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# To check our support for consoles in scenarios, rewrite tests from
# scenario_console.mu
# Tests for console interface.

scenario read-key-in-mu [
  assume-console [
    type [abc]
  ]
  run [
    1:char, 2:bool <- read-key console
    3:char, 4:bool <- read-key console
    5:char, 6:bool <- read-key console
    7:char, 8:bool <- read-key console
  ]
  memory-should-contain [
    1 <- 97  # 'a'
    2 <- 1
    3 <- 98  # 'b'
    4 <- 1
    5 <- 99  # 'c'
    6 <- 1
    7 <- 0  # eof
    8 <- 1
  ]
]
='#n425'>425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992
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<pre id='vimCodeElement'>
<span class="Comment">//: Containers contain a fixed number of elements of different types.</span>

<span class="Delimiter">:(before &quot;End Mu Types Initialization&quot;)</span>
<span class="Comment">//: We'll use this container as a running example in scenarios below.</span>
type_ordinal point = put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;point&quot;</span><span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
get_or_insert<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">);</span>  <span class="Comment">// initialize</span>
get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>kind = CONTAINER<span class="Delimiter">;</span>
get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>name = <span class="Constant">&quot;point&quot;</span><span class="Delimiter">;</span>
get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;x:number&quot;</span><span class="Delimiter">));</span>
get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;y:number&quot;</span><span class="Delimiter">));</span>

<span class="Comment">//: Containers can be copied around with a single instruction just like</span>
<span class="Comment">//: numbers, no matter how large they are.</span>

<span class="Comment">//: Tests in this layer often explicitly set up memory before reading it as a</span>
<span class="Comment">//: container. Don't do this in general. I'm tagging exceptions with /unsafe to</span>
<span class="Comment">//: skip later checks.</span>
<span class="Delimiter">:(scenario copy_multiple_locations)</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">3</span>:point<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:point/unsafe
]
<span class="traceContains">+mem: storing 34 in location 3</span>
<span class="traceContains">+mem: storing 35 in location 4</span>

<span class="Comment">//: trying to copy to a differently-typed destination will fail</span>
<span class="Delimiter">:(scenario copy_checks_size)</span>
<span class="Special">% Hide_errors = true;</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">2</span>:point<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:num
]
<span class="traceContains">+error: main: can't copy '1:num' to '2:point'; types don't match</span>

<span class="Delimiter">:(before &quot;End Mu Types Initialization&quot;)</span>
<span class="Comment">// A more complex example container, containing another container as one of</span>
<span class="Comment">// its elements.</span>
type_ordinal point_number = put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;point-number&quot;</span><span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
get_or_insert<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">);</span>  <span class="Comment">// initialize</span>
get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>kind = CONTAINER<span class="Delimiter">;</span>
get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>name = <span class="Constant">&quot;point-number&quot;</span><span class="Delimiter">;</span>
get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;xy:point&quot;</span><span class="Delimiter">));</span>
get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;z:number&quot;</span><span class="Delimiter">));</span>

<span class="Delimiter">:(scenario copy_handles_nested_container_elements)</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
  <span class="Constant">15</span>:point-number<span class="Special"> &lt;- </span>copy <span class="Constant">12</span>:point-number/unsafe
]
<span class="traceContains">+mem: storing 36 in location 17</span>

<span class="Comment">//: products of recipes can include containers</span>
<span class="Delimiter">:(scenario return_container)</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">3</span>:point<span class="Special"> &lt;- </span>f <span class="Constant">2</span>
]
<span class="muRecipe">def</span> f [
  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>next-ingredient
  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Identifier">return</span> <span class="Constant">12</span>:point/<span class="Special">raw</span>
]
<span class="traceContains">+run: result 0 is [2, 35]</span>
<span class="traceContains">+mem: storing 2 in location 3</span>
<span class="traceContains">+mem: storing 35 in location 4</span>

<span class="Comment">//: Containers can be checked for equality with a single instruction just like</span>
<span class="Comment">//: numbers, no matter how large they are.</span>

<span class="Delimiter">:(scenario compare_multiple_locations)</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># first</span>
  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
  <span class="Constant">4</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># second</span>
  <span class="Constant">5</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">6</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
  <span class="Constant">7</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>equal <span class="Constant">1</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">4</span>:point-number/unsafe
]
<span class="traceContains">+mem: storing 1 in location 7</span>

<span class="Delimiter">:(scenario compare_multiple_locations_2)</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># first</span>
  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
  <span class="Constant">4</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># second</span>
  <span class="Constant">5</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">6</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">37</span>  <span class="Comment"># different</span>
  <span class="Constant">7</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>equal <span class="Constant">1</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">4</span>:point-number/unsafe
]
<span class="traceContains">+mem: storing 0 in location 7</span>

<span class="Comment">//: Can't put this in type_info because later layers will add support for more</span>
<span class="Comment">//: complex type trees where metadata depends on *combinations* of types.</span>
<span class="Delimiter">:(before &quot;struct reagent&quot;)</span>
<span class="Normal">struct</span> container_metadata <span class="Delimiter">{</span>
  <span class="Normal">int</span> size<span class="Delimiter">;</span>
  vector&lt;<span class="Normal">int</span>&gt; offset<span class="Delimiter">;</span>  <span class="Comment">// not used by exclusive containers</span>
  <span class="Comment">// End container_metadata Fields</span>
  container_metadata<span class="Delimiter">()</span> :size<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Comment">// End container_metadata Constructor</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">};</span>
<span class="Delimiter">:(before &quot;End reagent Fields&quot;)</span>
container_metadata metadata<span class="Delimiter">;</span>  <span class="Comment">// can't be a pointer into Container_metadata because we keep changing the base storage when we save/restore snapshots</span>
<span class="Delimiter">:(before &quot;End reagent Copy Operator&quot;)</span>
metadata = other<span class="Delimiter">.</span>metadata<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End reagent Copy Constructor&quot;)</span>
metadata = other<span class="Delimiter">.</span>metadata<span class="Delimiter">;</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span class="Comment">// todo: switch to map after figuring out how to consistently compare type trees</span>
vector&lt;pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt; &gt; Container_metadata<span class="Delimiter">,</span> Container_metadata_snapshot<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End save_snapshots&quot;)</span>
Container_metadata_snapshot = Container_metadata<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End restore_snapshots&quot;)</span>
restore_container_metadata<span class="Delimiter">();</span>
<span class="Delimiter">:(before &quot;End One-time Setup&quot;)</span>
atexit<span class="Delimiter">(</span>clear_container_metadata<span class="Delimiter">);</span>
<span class="Delimiter">:(code)</span>
<span class="Comment">// invariant: Container_metadata always contains a superset of Container_metadata_snapshot</span>
<span class="Normal">void</span> restore_container_metadata<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    assert<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>i &lt; SIZE<span class="Delimiter">(</span>Container_metadata_snapshot<span class="Delimiter">))</span> <span class="Delimiter">{</span>
      assert<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first == Container_metadata_snapshot<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">);</span>
      <span class="Identifier">continue</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
    <span class="Normal">delete</span> Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">;</span>
    Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first = <span class="Constant">NULL</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  Container_metadata<span class="Delimiter">.</span>resize<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>Container_metadata_snapshot<span class="Delimiter">));</span>
<span class="Delimiter">}</span>
<span class="Normal">void</span> clear_container_metadata<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  Container_metadata_snapshot<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">delete</span> Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">;</span>
    Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first = <span class="Constant">NULL</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  Container_metadata<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

<span class="Comment">//: do no work in size_of, simply lookup Container_metadata</span>

<span class="Delimiter">:(before &quot;End size_of(reagent r) Cases&quot;)</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">)</span> <span class="Identifier">return</span> r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">;</span>

<span class="Delimiter">:(before &quot;End size_of(type) Cases&quot;)</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>value == -<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">1</span><span class="Delimiter">;</span>  <span class="Comment">// error value, but we'll raise it elsewhere</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">const</span> type_tree* root = root_type<span class="Delimiter">(</span>type<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> root<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
  raise &lt;&lt; <span class="Constant">&quot;no such type &quot;</span> &lt;&lt; root<span class="Delimiter">-&gt;</span>value &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
type_info t = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> root<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>t<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Comment">// Compute size_of Container</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> type<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">1</span><span class="Delimiter">;</span>  <span class="Comment">// error raised elsewhere</span>
  <span class="Identifier">return</span> get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> type<span class="Delimiter">).</span>size<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">const</span> type_tree* root_type<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* t<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">const</span> type_tree* result = t<span class="Delimiter">-&gt;</span>atom ? t : t<span class="Delimiter">-&gt;</span>left<span class="Delimiter">;</span>
  assert<span class="Delimiter">(</span>result<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">);</span>
  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Comment">//: precompute Container_metadata before we need size_of</span>
<span class="Comment">//: also store a copy in each reagent in each instruction in each recipe</span>

<span class="Delimiter">:(after &quot;End Type Modifying Transforms&quot;)</span>
Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>compute_container_sizes<span class="Delimiter">);</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span>recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  recipe&amp; caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
  trace<span class="Delimiter">(</span><span class="Constant">9992</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;--- compute container sizes for &quot;</span> &lt;&lt; caller<span class="Delimiter">.</span>name &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    instruction&amp; inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
    trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;- compute container sizes for &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
      compute_container_sizes<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
      compute_container_sizes<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span>reagent&amp; r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  expand_type_abbreviations<span class="Delimiter">(</span>r<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>is_literal<span class="Delimiter">(</span>r<span class="Delimiter">)</span> || is_dummy<span class="Delimiter">(</span>r<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
  reagent rcopy = r<span class="Delimiter">;</span>
  <span class="Comment">// Compute Container Size(reagent rcopy)</span>
  set&lt;type_tree&gt; pending_metadata<span class="Delimiter">;</span>  <span class="Comment">// might actually be faster to just convert to string rather than compare type_tree directly; so far the difference is negligible</span>
  compute_container_sizes<span class="Delimiter">(</span>rcopy<span class="Delimiter">.</span>type<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> rcopy<span class="Delimiter">.</span>type<span class="Delimiter">))</span>
    r<span class="Delimiter">.</span>metadata = get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> rcopy<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">,</span> set&lt;type_tree&gt;&amp; pending_metadata<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
  trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;compute container sizes for &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>type<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> type<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>pending_metadata<span class="Delimiter">,</span> *type<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
  pending_metadata<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>*type<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    assert<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;address&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
      compute_container_sizes<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">);</span>
    <span class="Delimiter">}</span>
    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;array&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
      <span class="Normal">const</span> type_tree* element_type = type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">;</span>
      <span class="Comment">// hack: support both array:num:3 and array:address:num</span>
      <span class="Normal">if</span> <span class="Delimiter">(</span>!element_type<span class="Delimiter">-&gt;</span>atom &amp;&amp; element_type<span class="Delimiter">-&gt;</span>right &amp;&amp; element_type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>atom &amp;&amp; is_integer<span class="Delimiter">(</span>element_type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>name<span class="Delimiter">))</span>
        element_type = element_type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">;</span>
      compute_container_sizes<span class="Delimiter">(</span>element_type<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">);</span>
    <span class="Delimiter">}</span>
    <span class="Comment">// End compute_container_sizes Non-atom Cases</span>
    <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  assert<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>  <span class="Comment">// error raised elsewhere</span>
  type_info&amp; info = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    compute_container_sizes<span class="Delimiter">(</span>info<span class="Delimiter">,</span> type<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  <span class="Comment">// End compute_container_sizes Atom Cases</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span><span class="Normal">const</span> type_info&amp; container_info<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* full_type<span class="Delimiter">,</span> set&lt;type_tree&gt;&amp; pending_metadata<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  assert<span class="Delimiter">(</span>container_info<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">);</span>
  <span class="Comment">// size of a container is the sum of the sizes of its element</span>
  <span class="Comment">// (So it can only contain arrays if they're static and include their</span>
  <span class="Comment">// length in the type.)</span>
  container_metadata metadata<span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>container_info<span class="Delimiter">.</span>elements<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = container_info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
    <span class="Comment">// Compute Container Size(element, full_type)</span>
    compute_container_sizes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">);</span>
    metadata<span class="Delimiter">.</span>offset<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">);</span>  <span class="Comment">// save previous size as offset</span>
    metadata<span class="Delimiter">.</span>size += size_of<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  Container_metadata<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt;<span class="Delimiter">(</span><span class="Normal">new</span> type_tree<span class="Delimiter">(</span>*full_type<span class="Delimiter">),</span> metadata<span class="Delimiter">));</span>
<span class="Delimiter">}</span>

container_metadata&amp; get<span class="Delimiter">(</span>vector&lt;pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt; &gt;&amp; all<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* key<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>all<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>matches<span class="Delimiter">(</span>all<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">,</span> key<span class="Delimiter">))</span>
      <span class="Identifier">return</span> all<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>second<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  tb_shutdown<span class="Delimiter">();</span>
  raise &lt;&lt; <span class="Constant">&quot;unknown size for type '&quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>key<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
  assert<span class="Delimiter">(</span><span class="Constant">false</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> contains_key<span class="Delimiter">(</span><span class="Normal">const</span> vector&lt;pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt; &gt;&amp; all<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* key<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>all<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>matches<span class="Delimiter">(</span>all<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">,</span> key<span class="Delimiter">))</span>
      <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> matches<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* a<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* b<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>a == b<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!a || !b<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>atom != b<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Identifier">return</span> a<span class="Delimiter">-&gt;</span>value == b<span class="Delimiter">-&gt;</span>value<span class="Delimiter">;</span>
  <span class="Identifier">return</span> matches<span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> b<span class="Delimiter">-&gt;</span>left<span class="Delimiter">)</span> &amp;&amp; matches<span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> b<span class="Delimiter">-&gt;</span>right<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario stash_container)</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># first</span>
  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
  stash [foo:]<span class="Delimiter">,</span> <span class="Constant">1</span>:point-number/<span class="Special">raw</span>
]
<span class="traceContains">+app: foo: 34 35 36</span>

<span class="Comment">//: for the following unit tests we'll do the work of the transform by hand</span>

<span class="Delimiter">:(before &quot;End Unit Tests&quot;)</span>
<span class="Normal">void</span> test_container_sizes<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// a container we don't have the size for</span>
  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:point&quot;</span><span class="Delimiter">);</span>
  CHECK<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  <span class="Comment">// scan</span>
  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  <span class="Comment">// the reagent we scanned knows its size</span>
  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
  <span class="Comment">// the global table also knows its size</span>
  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> test_container_sizes_through_aliases<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// a new alias for a container</span>
  put<span class="Delimiter">(</span>Type_abbreviations<span class="Delimiter">,</span> <span class="Constant">&quot;pt&quot;</span><span class="Delimiter">,</span> new_type_tree<span class="Delimiter">(</span><span class="Constant">&quot;point&quot;</span><span class="Delimiter">));</span>
  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:pt&quot;</span><span class="Delimiter">);</span>
  <span class="Comment">// scan</span>
  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  <span class="Comment">// the reagent we scanned knows its size</span>
  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
  <span class="Comment">// the global table also knows its size</span>
  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> test_container_sizes_nested<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// a container we don't have the size for</span>
  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:point-number&quot;</span><span class="Delimiter">);</span>
  CHECK<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  <span class="Comment">// scan</span>
  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  <span class="Comment">// the reagent we scanned knows its size</span>
  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">3</span><span class="Delimiter">);</span>
  <span class="Comment">// the global table also knows its size</span>
  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">3</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> test_container_sizes_recursive<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// define a container containing an address to itself</span>
  run<span class="Delimiter">(</span><span class="Constant">&quot;container foo [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;  x:num</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;  y:address:foo</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:foo&quot;</span><span class="Delimiter">);</span>
  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> test_container_sizes_from_address<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// a container we don't have the size for</span>
  reagent container<span class="Delimiter">(</span><span class="Constant">&quot;x:point&quot;</span><span class="Delimiter">);</span>
  CHECK<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  <span class="Comment">// scanning an address to the container precomputes the size of the container</span>
  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:address:point&quot;</span><span class="Delimiter">);</span>
  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> test_container_sizes_from_array<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// a container we don't have the size for</span>
  reagent container<span class="Delimiter">(</span><span class="Constant">&quot;x:point&quot;</span><span class="Delimiter">);</span>
  CHECK<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  <span class="Comment">// scanning an array of the container precomputes the size of the container</span>
  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:array:point&quot;</span><span class="Delimiter">);</span>
  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> test_container_sizes_from_address_to_array<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// a container we don't have the size for</span>
  reagent container<span class="Delimiter">(</span><span class="Constant">&quot;x:point&quot;</span><span class="Delimiter">);</span>
  CHECK<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  <span class="Comment">// scanning an address to an array of the container precomputes the size of the container</span>
  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:address:array:point&quot;</span><span class="Delimiter">);</span>
  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> test_container_sizes_from_static_array<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// a container we don't have the size for</span>
  reagent container<span class="Delimiter">(</span><span class="Constant">&quot;x:point&quot;</span><span class="Delimiter">);</span>
  <span class="Normal">int</span> old_size = SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">);</span>
  <span class="Comment">// scanning an address to an array of the container precomputes the size of the container</span>
  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:array:point:10&quot;</span><span class="Delimiter">);</span>
  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
  <span class="Comment">// no non-container types precomputed</span>
  CHECK_EQ<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">)</span>-old_size<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> test_container_sizes_from_address_to_static_array<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// a container we don't have the size for</span>
  reagent container<span class="Delimiter">(</span><span class="Constant">&quot;x:point&quot;</span><span class="Delimiter">);</span>
  <span class="Normal">int</span> old_size = SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">);</span>
  <span class="Comment">// scanning an address to an array of the container precomputes the size of the container</span>
  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:address:array:point:10&quot;</span><span class="Delimiter">);</span>
  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
  <span class="Comment">// no non-container types precomputed</span>
  CHECK_EQ<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">)</span>-old_size<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> test_container_sizes_from_repeated_address_and_array_types<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// a container we don't have the size for</span>
  reagent container<span class="Delimiter">(</span><span class="Constant">&quot;x:point&quot;</span><span class="Delimiter">);</span>
  <span class="Normal">int</span> old_size = SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">);</span>
  <span class="Comment">// scanning repeated address and array types modifying the container precomputes the size of the container</span>
  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:address:array:address:array:point:10&quot;</span><span class="Delimiter">);</span>
  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
  <span class="Comment">// no non-container types precomputed</span>
  CHECK_EQ<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">)</span>-old_size<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="SalientComment">//:: To access elements of a container, use 'get'</span>
<span class="Comment">//: 'get' takes a 'base' container and an 'offset' into it and returns the</span>
<span class="Comment">//: appropriate element of the container value.</span>

<span class="Delimiter">:(scenario get)</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">15</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">12</span>:point/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>  <span class="Comment"># unsafe</span>
]
<span class="traceContains">+mem: storing 35 in location 15</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
GET<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;get&quot;</span><span class="Delimiter">,</span> GET<span class="Delimiter">);</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span class="Normal">case</span> GET: <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'get' expects exactly 2 ingredients in '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>  <span class="Comment">// new copy for every invocation</span>
  <span class="Comment">// Update GET base in Check</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!base<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'get' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
  <span class="Comment">// Update GET base_type in Check</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!base_type<span class="Delimiter">-&gt;</span>atom || base_type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span> || !contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">)</span> || get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>kind != CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'get' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">const</span> reagent&amp; offset = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>offset<span class="Delimiter">)</span> || !is_mu_scalar<span class="Delimiter">(</span>offset<span class="Delimiter">))</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;second ingredient of 'get' should have type 'offset', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">int</span> offset_value = <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>is_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">))</span>  <span class="Comment">// later layers permit non-integer offsets</span>
    offset_value = to_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
  <span class="Normal">else</span>
    offset_value = offset<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>offset_value &lt; <span class="Constant">0</span> || offset_value &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;invalid offset '&quot;</span> &lt;&lt; offset_value &lt;&lt; <span class="Constant">&quot;' for '&quot;</span> &lt;&lt; get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> product = inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
  <span class="Comment">// Update GET product in Check</span>
  <span class="Normal">const</span> reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = element_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">,</span> offset_value<span class="Delimiter">);</span>  <span class="Comment">// not just base_type because later layers will introduce compound types</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>product<span class="Delimiter">,</span> element<span class="Delimiter">))</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'get &quot;</span> &lt;&lt; base<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;, &quot;</span> &lt;&lt; offset<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;' should write to &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; but '&quot;</span> &lt;&lt; product<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;' has type &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>product<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span class="Normal">case</span> GET: <span class="Delimiter">{</span>
  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
  <span class="Comment">// Update GET base in Run</span>
  <span class="Normal">int</span> base_address = base<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>base_address == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;tried to access location 0 in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
  <span class="Comment">// Update GET base_type in Run</span>
  <span class="Normal">int</span> offset = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>offset &lt; <span class="Constant">0</span> || offset &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// copied from Check above</span>
  assert<span class="Delimiter">(</span>base<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">);</span>
  <span class="Normal">int</span> src = base_address + base<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>offset<span class="Delimiter">.</span>at<span class="Delimiter">(</span>offset<span class="Delimiter">);</span>
  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;address to copy is &quot;</span> &lt;&lt; src &lt;&lt; end<span class="Delimiter">();</span>
  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = element_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">,</span> offset<span class="Delimiter">);</span>  <span class="Comment">// not just base_type because later layers will introduce compound types</span>
  element<span class="Delimiter">.</span>set_value<span class="Delimiter">(</span>src<span class="Delimiter">);</span>
  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;its type is &quot;</span> &lt;&lt; names_to_string<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Comment">// Read element</span>
  products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>read_memory<span class="Delimiter">(</span>element<span class="Delimiter">));</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">const</span> reagent element_type<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">,</span> <span class="Normal">int</span> offset_value<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  assert<span class="Delimiter">(</span>offset_value &gt;= <span class="Constant">0</span><span class="Delimiter">);</span>
  <span class="Normal">const</span> type_tree* root = root_type<span class="Delimiter">(</span>type<span class="Delimiter">);</span>
  assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> root<span class="Delimiter">-&gt;</span>value<span class="Delimiter">));</span>
  assert<span class="Delimiter">(</span>!get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> root<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
  <span class="Normal">const</span> type_info&amp; info = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> root<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
  assert<span class="Delimiter">(</span>info<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>offset_value &gt;= SIZE<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">))</span> <span class="Identifier">return</span> reagent<span class="Delimiter">();</span>  <span class="Comment">// error handled elsewhere</span>
  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>offset_value<span class="Delimiter">);</span>
  <span class="Comment">// End element_type Special-cases</span>
  <span class="Identifier">return</span> element<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario get_handles_nested_container_elements)</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
  <span class="Constant">15</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>  <span class="Comment"># unsafe</span>
]
<span class="traceContains">+mem: storing 36 in location 15</span>

<span class="Delimiter">:(scenario get_out_of_bounds)</span>
<span class="Special">% Hide_errors = true;</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
  get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">2:offset</span>  <span class="Comment"># point-number occupies 3 locations but has only 2 fields; out of bounds</span>
]
<span class="traceContains">+error: main: invalid offset '2' for 'point-number'</span>

<span class="Delimiter">:(scenario get_out_of_bounds_2)</span>
<span class="Special">% Hide_errors = true;</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
  get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">-1:offset</span>
]
<span class="traceContains">+error: main: invalid offset '-1' for 'point-number'</span>

<span class="Delimiter">:(scenario get_product_type_mismatch)</span>
<span class="Special">% Hide_errors = true;</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
  <span class="Constant">15</span>:address:num<span class="Special"> &lt;- </span>get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>
]
<span class="traceContains">+error: main: 'get 12:point-number/raw, 1:offset' should write to number but '15' has type (address number)</span>

<span class="Comment">//: we might want to call 'get' without saving the results, say in a sandbox</span>

<span class="Delimiter">:(scenario get_without_product)</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  get <span class="Constant">12</span>:point/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>  <span class="Comment"># unsafe</span>
]
<span class="Comment"># just don't die</span>

<span class="SalientComment">//:: To write to elements of containers, use 'put'.</span>

<span class="Delimiter">:(scenario put)</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  $clear-trace
  <span class="Constant">12</span>:point<span class="Special"> &lt;- </span>put <span class="Constant">12</span>:point<span class="Delimiter">,</span> <span class="Constant">1:offset</span><span class="Delimiter">,</span> <span class="Constant">36</span>
]
<span class="traceContains">+mem: storing 36 in location 13</span>
<span class="traceAbsent">-mem: storing 34 in location 12</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
PUT<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;put&quot;</span><span class="Delimiter">,</span> PUT<span class="Delimiter">);</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span class="Normal">case</span> PUT: <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">3</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'put' expects exactly 3 ingredients in '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
  <span class="Comment">// Update PUT base in Check</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!base<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'put' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
  <span class="Comment">// Update PUT base_type in Check</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!base_type<span class="Delimiter">-&gt;</span>atom || base_type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span> || !contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">)</span> || get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>kind != CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'put' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> offset = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
  <span class="Comment">// Update PUT offset in Check</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>offset<span class="Delimiter">)</span> || !is_mu_scalar<span class="Delimiter">(</span>offset<span class="Delimiter">))</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;second ingredient of 'put' should have type 'offset', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">int</span> offset_value = <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>is_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">))</span> <span class="Delimiter">{</span>  <span class="Comment">// later layers permit non-integer offsets</span>
    offset_value = to_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>offset_value &lt; <span class="Constant">0</span> || offset_value &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Delimiter">{</span>
      raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;invalid offset '&quot;</span> &lt;&lt; offset_value &lt;&lt; <span class="Constant">&quot;' for '&quot;</span> &lt;&lt; get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Identifier">break</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Normal">else</span> <span class="Delimiter">{</span>
    offset_value = offset<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">const</span> reagent&amp; value = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>
  <span class="Normal">const</span> reagent&amp; element = element_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">,</span> offset_value<span class="Delimiter">);</span>  <span class="Comment">// not just base_type because later layers will introduce compound types</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>element<span class="Delimiter">,</span> value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'put &quot;</span> &lt;&lt; base<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;, &quot;</span> &lt;&lt; offset<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;' should write to &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; but '&quot;</span> &lt;&lt; value<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;' has type &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>value<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// no more checks necessary</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name != inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;product of 'put' must be first ingredient '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Comment">// End PUT Product Checks</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span class="Normal">case</span> PUT: <span class="Delimiter">{</span>
  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
  <span class="Comment">// Update PUT base in Run</span>
  <span class="Normal">int</span> base_address = base<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>base_address == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;tried to access location 0 in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
  <span class="Comment">// Update PUT base_type in Run</span>
  <span class="Normal">int</span> offset = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>offset &lt; <span class="Constant">0</span> || offset &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// copied from Check above</span>
  <span class="Normal">int</span> address = base_address + base<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>offset<span class="Delimiter">.</span>at<span class="Delimiter">(</span>offset<span class="Delimiter">);</span>
  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;address to copy to is &quot;</span> &lt;&lt; address &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Comment">// optimization: directly write the element rather than updating 'product'</span>
  <span class="Comment">// and writing the entire container</span>
  <span class="Comment">// Write Memory in PUT in Run</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">));</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;mem&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;storing &quot;</span> &lt;&lt; no_scientific<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; <span class="Constant">&quot; in location &quot;</span> &lt;&lt; address+i &lt;&lt; end<span class="Delimiter">();</span>
    put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> address+i<span class="Delimiter">,</span> ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">goto</span> finish_instruction<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario put_product_error)</span>
<span class="Special">% Hide_errors = true;</span>
<span class="muRecipe">def</span> main [
  local-scope
  load-ingredients
  <span class="Constant">1</span>:point<span class="Special"> &lt;- </span>merge <span class="Constant">34</span><span class="Delimiter">,</span> <span class="Constant">35</span>
  <span class="Constant">3</span>:point<span class="Special"> &lt;- </span>put <span class="Constant">1</span>:point<span class="Delimiter">,</span> <span class="Constant">x:offset</span><span class="Delimiter">,</span> <span class="Constant">36</span>
]
<span class="traceContains">+error: main: product of 'put' must be first ingredient '1:point', but got '3:point'</span>

<span class="SalientComment">//:: Allow containers to be defined in mu code.</span>

<span class="Delimiter">:(scenarios load)</span>
<span class="Delimiter">:(scenario container)</span>
<span class="muData">container</span> foo [
  <span class="Normal">x</span>:num
  <span class="Normal">y</span>:num
]
<span class="traceContains">+parse: --- defining container foo</span>
<span class="traceContains">+parse: element: {x: &quot;number&quot;}</span>
<span class="traceContains">+parse: element: {y: &quot;number&quot;}</span>

<span class="Delimiter">:(scenario container_use_before_definition)</span>
<span class="muData">container</span> foo [
  <span class="Normal">x</span>:num
  <span class="Normal">y</span>:bar
]
<span class="muData">container</span> bar [
  <span class="Normal">x</span>:num
  <span class="Normal">y</span>:num
]
<span class="traceContains">+parse: --- defining container foo</span>
<span class="traceContains">+parse: type number: 1000</span>
<span class="traceContains">+parse:   element: {x: &quot;number&quot;}</span>
<span class="Comment"># todo: brittle</span>
<span class="Comment"># type bar is unknown at this point, but we assign it a number</span>
<span class="traceContains">+parse:   element: {y: &quot;bar&quot;}</span>
<span class="Comment"># later type bar geon</span>
<span class="traceContains">+parse: --- defining container bar</span>
<span class="traceContains">+parse: type number: 1001</span>
<span class="traceContains">+parse:   element: {x: &quot;number&quot;}</span>
<span class="traceContains">+parse:   element: {y: &quot;number&quot;}</span>

<span class="Comment">//: if a container is defined again, the new fields add to the original definition</span>
<span class="Delimiter">:(scenarios run)</span>
<span class="Delimiter">:(scenario container_extend)</span>
<span class="muData">container</span> foo [
  <span class="Normal">x</span>:num
]
<span class="Comment"># add to previous definition</span>
<span class="muData">container</span> foo [
  <span class="Normal">y</span>:num
]
<span class="muRecipe">def</span> main [
  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">1</span>:foo<span class="Delimiter">,</span> <span class="Constant">0:offset</span>
  <span class="Constant">4</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">1</span>:foo<span class="Delimiter">,</span> <span class="Constant">1:offset</span>
]
<span class="traceContains">+mem: storing 34 in location 3</span>
<span class="traceContains">+mem: storing 35 in location 4</span>

<span class="Delimiter">:(before &quot;End Command Handlers&quot;)</span>
<span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>command == <span class="Constant">&quot;container&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
  insert_container<span class="Delimiter">(</span>command<span class="Delimiter">,</span> CONTAINER<span class="Delimiter">,</span> in<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Comment">//: Even though we allow containers to be extended, we don't allow this after</span>
<span class="Comment">//: a call to transform_all. But we do want to detect this situation and raise</span>
<span class="Comment">//: an error. This field will help us raise such errors.</span>
<span class="Delimiter">:(before &quot;End type_info Fields&quot;)</span>
<span class="Normal">int</span> Num_calls_to_transform_all_at_first_definition<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End type_info Constructor&quot;)</span>
Num_calls_to_transform_all_at_first_definition = -<span class="Constant">1</span><span class="Delimiter">;</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> insert_container<span class="Delimiter">(</span><span class="Normal">const</span> string&amp; command<span class="Delimiter">,</span> kind_of_type kind<span class="Delimiter">,</span> istream&amp; in<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
  string name = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
  <span class="Comment">// End container Name Refinements</span>
  trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">&quot;parse&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;--- defining &quot;</span> &lt;&lt; command &lt;&lt; <span class="Constant">' '</span> &lt;&lt; name &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">)</span>
      || get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">)</span> == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;parse&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;type number: &quot;</span> &lt;&lt; get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
  skip_bracket<span class="Delimiter">(</span>in<span class="Delimiter">,</span> <span class="Constant">&quot;'&quot;</span>+command+<span class="Constant">&quot;' must begin with '['&quot;</span><span class="Delimiter">);</span>
  type_info&amp; info = get_or_insert<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">));</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>Num_calls_to_transform_all_at_first_definition == -<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Comment">// initial definition of this container</span>
    info<span class="Delimiter">.</span>Num_calls_to_transform_all_at_first_definition = Num_calls_to_transform_all<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>Num_calls_to_transform_all_at_first_definition != Num_calls_to_transform_all<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Comment">// extension after transform_all</span>
    raise &lt;&lt; <span class="Constant">&quot;there was a call to transform_all() between the definition of container '&quot;</span> &lt;&lt; name &lt;&lt; <span class="Constant">&quot;' and a subsequent extension. This is not supported, since any recipes that used '&quot;</span> &lt;&lt; name &lt;&lt; <span class="Constant">&quot;' values have already been transformed and </span><span class="cSpecial">\&quot;</span><span class="Constant">frozen</span><span class="cSpecial">\&quot;</span><span class="Constant">.</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  info<span class="Delimiter">.</span>name = name<span class="Delimiter">;</span>
  info<span class="Delimiter">.</span>kind = kind<span class="Delimiter">;</span>
  <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span>
    skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
    string element = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>element == <span class="Constant">&quot;]&quot;</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
      raise &lt;&lt; command &lt;&lt; <span class="Constant">&quot; '&quot;</span> &lt;&lt; name &lt;&lt; <span class="Constant">&quot;' contains multiple elements on a single line. Containers and exclusive containers must only contain elements, one to a line, no code.</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Comment">// skip rest of container declaration</span>
      <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span>
        skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
        <span class="Normal">if</span> <span class="Delimiter">(</span>next_word<span class="Delimiter">(</span>in<span class="Delimiter">)</span> == <span class="Constant">&quot;]&quot;</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
      <span class="Delimiter">}</span>
      <span class="Identifier">break</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
    info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span>element<span class="Delimiter">));</span>
    expand_type_abbreviations<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">().</span>type<span class="Delimiter">);</span>  <span class="Comment">// todo: use abbreviation before declaration</span>
    replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">().</span>type<span class="Delimiter">,</span> info<span class="Delimiter">);</span>
    trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;parse&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;  element: &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">())</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Comment">// End Load Container Element Definition</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>type_tree* type<span class="Delimiter">,</span> <span class="Normal">const</span> type_info&amp; info<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> info<span class="Delimiter">);</span>
    replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> info<span class="Delimiter">);</span>
    <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  assert<span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">))</span> <span class="Delimiter">{</span>
    type<span class="Delimiter">-&gt;</span>value = get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>is_integer<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">))</span> <span class="Delimiter">{</span>  <span class="Comment">// sometimes types will contain non-type tags, like numbers for the size of an array</span>
    type<span class="Delimiter">-&gt;</span>value = <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Comment">// End insert_container Special-cases</span>
  <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>name != <span class="Constant">&quot;-&gt;&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>  <span class="Comment">// used in recipe types</span>
    put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
    type<span class="Delimiter">-&gt;</span>value = get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> skip_bracket<span class="Delimiter">(</span>istream&amp; in<span class="Delimiter">,</span> string message<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>get<span class="Delimiter">()</span> != <span class="Constant">'['</span><span class="Delimiter">)</span>
    raise &lt;&lt; message &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario multi_word_line_in_container_declaration)</span>
<span class="Special">% Hide_errors = true;</span>
<span class="muData">container</span> foo [
  <span class="Normal">x</span>:num y:num
]
<span class="traceContains">+error: container 'foo' contains multiple elements on a single line. Containers and exclusive containers must only contain elements, one to a line, no code.</span>

<span class="Comment">//: support type abbreviations in container definitions</span>

<span class="Delimiter">:(scenario type_abbreviations_in_containers)</span>
<span class="muData">type</span> foo = number
<span class="muData">container</span> bar [
  <span class="Normal">x</span>:foo
]
<span class="muRecipe">def</span> main [
  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">2</span>:foo<span class="Special"> &lt;- </span>get <span class="Constant">1</span>:bar/unsafe<span class="Delimiter">,</span> <span class="Constant">0:offset</span>
]
<span class="traceContains">+mem: storing 34 in location 2</span>

<span class="Delimiter">:(after &quot;Transform.push_back(expand_type_abbreviations)&quot;)</span>
Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>expand_type_abbreviations_in_containers<span class="Delimiter">);</span>
<span class="Delimiter">:(code)</span>
<span class="Comment">// extremely inefficient; we process all types over and over again, once for every single recipe</span>
<span class="Comment">// but it doesn't seem to cause any noticeable slowdown</span>
<span class="Normal">void</span> expand_type_abbreviations_in_containers<span class="Delimiter">(</span>unused <span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span>map&lt;type_ordinal<span class="Delimiter">,</span> type_info&gt;::iterator p = Type<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != Type<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span>second<span class="Delimiter">.</span>elements<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
      expand_type_abbreviations<span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span>second<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Comment">//: ensure scenarios are consistent by always starting new container</span>
<span class="Comment">//: declarations at the same type number</span>
<span class="Delimiter">:(before &quot;End Setup&quot;)</span>  <span class="Comment">//: for tests</span>
Next_type_ordinal = <span class="Constant">1000</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Test Run Initialization&quot;)</span>
assert<span class="Delimiter">(</span>Next_type_ordinal &lt; <span class="Constant">1000</span><span class="Delimiter">);</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> test_error_on_transform_all_between_container_definition_and_extension<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// define a container</span>
  run<span class="Delimiter">(</span><span class="Constant">&quot;container foo [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;  a:num</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
  <span class="Comment">// try to extend the container after transform</span>
  transform_all<span class="Delimiter">();</span>
  CHECK_TRACE_DOESNT_CONTAIN_ERROR<span class="Delimiter">();</span>
  Hide_errors = <span class="Constant">true</span><span class="Delimiter">;</span>
  run<span class="Delimiter">(</span><span class="Constant">&quot;container foo [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;  b:num</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
  CHECK_TRACE_CONTAINS_ERROR<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

<span class="SalientComment">//:: Allow container definitions anywhere in the codebase, but complain if you</span>
<span class="SalientComment">//:: can't find a definition at the end.</span>

<span class="Delimiter">:(scenario run_complains_on_unknown_types)</span>
<span class="Special">% Hide_errors = true;</span>
<span class="muRecipe">def</span> main [
  <span class="Comment"># integer is not a type</span>
  <span class="Constant">1</span>:integer<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
]
<span class="traceContains">+error: main: unknown type integer in '1:integer &lt;- copy 0'</span>

<span class="Delimiter">:(scenario run_allows_type_definition_after_use)</span>
<span class="muRecipe">def</span> main [
  <span class="Constant">1</span>:bar<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/unsafe
]
<span class="muData">container</span> bar [
  <span class="Normal">x</span>:num
]
$error: <span class="Constant">0</span>

<span class="Delimiter">:(before &quot;End Type Modifying Transforms&quot;)</span>
Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>check_or_set_invalid_types<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> check_or_set_invalid_types<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  recipe&amp; caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
  trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;--- check for invalid types in recipe &quot;</span> &lt;&lt; caller<span class="Delimiter">.</span>name &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> index = <span class="Constant">0</span><span class="Delimiter">;</span> index &lt; SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    instruction&amp; inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
      check_or_set_invalid_types<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">,</span> maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">),</span> <span class="Constant">&quot;'&quot;</span>+inst<span class="Delimiter">.</span>original_string+<span class="Constant">&quot;'&quot;</span><span class="Delimiter">);</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
      check_or_set_invalid_types<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">,</span> maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">),</span> <span class="Constant">&quot;'&quot;</span>+inst<span class="Delimiter">.</span>original_string+<span class="Constant">&quot;'&quot;</span><span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  <span class="Comment">// End check_or_set_invalid_types</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> check_or_set_invalid_types<span class="Delimiter">(</span>type_tree* type<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; block<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>  <span class="Comment">// will throw a more precise error elsewhere</span>
  <span class="Comment">// End Container Type Checks</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    check_or_set_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> block<span class="Delimiter">,</span> name<span class="Delimiter">);</span>
    check_or_set_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> block<span class="Delimiter">,</span> name<span class="Delimiter">);</span>
    <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
    assert<span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">))</span>
      type<span class="Delimiter">-&gt;</span>value = get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">);</span>
    <span class="Normal">else</span>
      raise &lt;&lt; block &lt;&lt; <span class="Constant">&quot;unknown type &quot;</span> &lt;&lt; type<span class="Delimiter">-&gt;</span>name &lt;&lt; <span class="Constant">&quot; in &quot;</span> &lt;&lt; name &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario container_unknown_field)</span>
<span class="Special">% Hide_errors = true;</span>
<span class="muData">container</span> foo [
  <span class="Normal">x</span>:num
  <span class="Normal">y</span>:bar
]
<span class="traceContains">+error: foo: unknown type in y</span>

<span class="Delimiter">:(scenario read_container_with_bracket_in_comment)</span>
<span class="muData">container</span> foo [
  <span class="Normal">x</span>:num
  <span class="Comment"># ']' in comment</span>
  <span class="Normal">y</span>:num
]
<span class="traceContains">+parse: --- defining container foo</span>
<span class="traceContains">+parse: element: {x: &quot;number&quot;}</span>
<span class="traceContains">+parse: element: {y: &quot;number&quot;}</span>

<span class="Delimiter">:(scenario container_with_compound_field_type)</span>
<span class="muData">container</span> foo [
  <span class="Delimiter">{</span>x: <span class="Delimiter">(</span>address array <span class="Delimiter">(</span>address array character<span class="Delimiter">))}</span>
]
$error: <span class="Constant">0</span>

<span class="Delimiter">:(before &quot;End transform_all&quot;)</span>
check_container_field_types<span class="Delimiter">();</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> check_container_field_types<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span>map&lt;type_ordinal<span class="Delimiter">,</span> type_info&gt;::iterator p = Type<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != Type<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">const</span> type_info&amp; info = p<span class="Delimiter">-&gt;</span>second<span class="Delimiter">;</span>
    <span class="Comment">// Check Container Field Types(info)</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
      check_invalid_types<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">,</span> maybe<span class="Delimiter">(</span>info<span class="Delimiter">.</span>name<span class="Delimiter">),</span> info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> check_invalid_types<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; block<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>  <span class="Comment">// will throw a more precise error elsewhere</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    check_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> block<span class="Delimiter">,</span> name<span class="Delimiter">);</span>
    check_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> block<span class="Delimiter">,</span> name<span class="Delimiter">);</span>
    <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>value != <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>  <span class="Comment">// value 0 = compound types (layer parse_tree) or type ingredients (layer shape_shifting_container)</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span>
      raise &lt;&lt; block &lt;&lt; <span class="Constant">&quot;unknown type in &quot;</span> &lt;&lt; name &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>
</pre>
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