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.\" ========================================================================
.\"
.IX Title "RIFLE 1"
.TH RIFLE 1 "rifle-1.5.5" "02/18/2013" "rifle manual"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
rifle \- ranger's file opener
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBrifle\fR [\fB\-\-help\fR] [\fB\-f\fR \fI\s-1FLAGS\s0\fR] [\fB\-l\fR] [\fB\-p\fR \fI\s-1KEYWORD\s0\fR]
[\fB\-w\fR \fI\s-1PROGRAM\s0\fR] \fIfiles\fR
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
rifle is a powerful file executor that allows for complex file type checking,
written to meet the needs of the file manager \fIranger\fR.  rifle's strength lies
in automatically determining file types, depending on which programs are
installed on the system, even without any user interaction.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-f\fR \fI\s-1FLAGS\s0\fR" 14
.IX Item "-f FLAGS"
Specify flags for opening the files.  Flags are letters that changes how the
program is executed.  Any combination of flags will work.  Writing uppercase
flags will negate the effect of all previously used lowercase flags of the same
letter.
.Sp
Table of all flags:
 f   fork program to background
 r   run program as root, using sudo
 t   run program in a separate terminal, as specified by \f(CW$TERMCMD\fR
.IP "\fB\-l\fR" 14
.IX Item "-l"
List all possible ways to open the specified files.  Each line will contain information in the format of \fIid:label:flags:command\fR. \fIid\fR is the identification number. \fIlabel\fR is an arbitrary string that was specified for this command, \fIflags\fR are the flags that are used by default, and \fIcommand\fR is the command that is going to be executed.
.IP "\fB\-p\fR \fI\s-1KEYWORD\s0\fR" 14
.IX Item "-p KEYWORD"
Pick a method to open the files.
.Sp
\&\fI\s-1KEYWORD\s0\fR is either the \s-1ID\s0 number listed by \f(CW\*(C`rifle \-l\*(C'\fR or a string that matches a label in the configuration file.
.IP "\fB\-w\fR \fI\s-1PROGRAM\s0\fR" 14
.IX Item "-w PROGRAM"
Open the files with the program \fI\s-1PROGRAM\s0\fR
.IP "\fB\-h\fR, \fB\-\-help\fR" 14
.IX Item "-h, --help"
Print a list of options and exit.
.SH "FILES"
.IX Header "FILES"
rifle shares configuration files with ranger, though ranger is not required in
order to use rifle.  The configuration file \fIrifle.conf\fR is expected to be at
\&\fI~/.config/ranger/rifle.conf\fR.
.PP
This file specifies patterns for determining the commands to open files with.
The syntax is described in the comments of the default \fIrifle.conf\fR that ships
with ranger.  To obtain it, you need to run: \f(CW\*(C`ranger \-\-copy\-config=rifle\*(C'\fR
.SH "ENVIRONMENT"
.IX Header "ENVIRONMENT"
.IP "\s-1EDITOR\s0" 8
.IX Item "EDITOR"
Determines which editor to use for editing files (in the default \fIrifle.conf\fR).
.IP "\s-1PAGER\s0" 8
.IX Item "PAGER"
Determines which pager to use for displaying files (in the default \fIrifle.conf\fR).
.IP "\s-1TERMCMD\s0" 8
.IX Item "TERMCMD"
Determines the terminal emulator command for use with the \fIt\fR flag.  It is required that the value is the path to an executable file which accepts the \*(L"\-e \s-1COMMAND\s0\*(R" argument.
.IP "\s-1XDG_CONFIG_HOME\s0" 8
.IX Item "XDG_CONFIG_HOME"
Specifies the directory for configuration files. Defaults to \fI\f(CI$HOME\fI/.config\fR.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
List all the different methods:
.PP
.Vb 4
\& $ rifle \-l helloworld.py
\& 0:editor::"$EDITOR" \-\- "$@"
\& 1:pager::"$PAGER" \-\- "$@"
\& 2:::python \-\- "$1"
.Ve
.PP
Display its content by opening it with \*(L"cat\*(R":
.PP
.Vb 2
\& $ rifle \-w cat helloworld.py
\& print("Hello World!")
.Ve
.PP
Run it by picking the method 2, which calls 'python \*(-- \*(L"$1\*(R"':
.PP
.Vb 2
\& $ rifle \-p 2 helloworld.py
\& Hello World!
.Ve
.PP
Display the file in a pager inside a new terminal, run as root:
.PP
.Vb 1
\& $ rifle \-p 1 \-f tr helloworld.py
.Ve
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<a href='https://github.com/akkartik/mu/blob/master/031merge.cc'>https://github.com/akkartik/mu/blob/master/031merge.cc</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr">  1 </span><span class="Comment">//: Construct types out of their constituent fields.</span>
<span id="L2" class="LineNr">  2 </span>
<span id="L3" class="LineNr">  3 </span><span class="Delimiter">:(scenario merge)</span>
<span id="L4" class="LineNr">  4 </span><span class="muData">container</span> foo [
<span id="L5" class="LineNr">  5 </span>  <span class="Normal">x</span>:num
<span id="L6" class="LineNr">  6 </span>  <span class="Normal">y</span>:num
<span id="L7" class="LineNr">  7 </span>]
<span id="L8" class="LineNr">  8 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L9" class="LineNr">  9 </span>  <span class="Constant">1</span>:foo<span class="Special"> &lt;- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L10" class="LineNr"> 10 </span>]
<span id="L11" class="LineNr"> 11 </span><span class="traceContains">+mem: storing 3 in location 1</span>
<span id="L12" class="LineNr"> 12 </span><span class="traceContains">+mem: storing 4 in location 2</span>
<span id="L13" class="LineNr"> 13 </span>
<span id="L14" class="LineNr"> 14 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L15" class="LineNr"> 15 </span>MERGE<span class="Delimiter">,</span>
<span id="L16" class="LineNr"> 16 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L17" class="LineNr"> 17 </span><a href='001help.cc.html#L221'>put</a><span class="Delimiter">(</span><span class="Special">Recipe_ordinal</span><span class="Delimiter">,</span> <span class="Constant">&quot;merge&quot;</span><span class="Delimiter">,</span> MERGE<span class="Delimiter">);</span>
<span id="L18" class="LineNr"> 18 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L19" class="LineNr"> 19 </span><span class="Normal">case</span> MERGE: <span class="Delimiter">{</span>
<span id="L20" class="LineNr"> 20 </span>  <span class="Comment">// type-checking in a separate transform below</span>
<span id="L21" class="LineNr"> 21 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L22" class="LineNr"> 22 </span><span class="Delimiter">}</span>
<span id="L23" class="LineNr"> 23 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L24" class="LineNr"> 24 </span><span class="Normal">case</span> MERGE: <span class="Delimiter">{</span>
<span id="L25" class="LineNr"> 25 </span>  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L26" class="LineNr"> 26 </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; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
<span id="L27" class="LineNr"> 27 </span>    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> j = <span class="Constant">0</span><span class="Delimiter">;</span>  j &lt; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>  ++j<span class="Delimiter">)</span>
<span id="L28" class="LineNr"> 28 </span>      products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>at<span class="Delimiter">(</span>j<span class="Delimiter">));</span>
<span id="L29" class="LineNr"> 29 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L30" class="LineNr"> 30 </span><span class="Delimiter">}</span>
<span id="L31" class="LineNr"> 31 </span>
<span id="L32" class="LineNr"> 32 </span><span class="Comment">//: type-check 'merge' to avoid interpreting numbers as addresses</span>
<span id="L33" class="LineNr"> 33 </span>
<span id="L34" class="LineNr"> 34 </span><span class="Delimiter">:(scenario merge_check)</span>
<span id="L35" class="LineNr"> 35 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L36" class="LineNr"> 36 </span>  <span class="Constant">1</span>:point<span class="Special"> &lt;- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L37" class="LineNr"> 37 </span>]
<span id="L38" class="LineNr"> 38 </span>$error: <span class="Constant">0</span>
<span id="L39" class="LineNr"> 39 </span>
<span id="L40" class="LineNr"> 40 </span><span class="Delimiter">:(scenario merge_check_missing_element)</span>
<span id="L41" class="LineNr"> 41 </span><span class="Special">% Hide_errors = true;</span>
<span id="L42" class="LineNr"> 42 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L43" class="LineNr"> 43 </span>  <span class="Constant">1</span>:point<span class="Special"> &lt;- </span>merge <span class="Constant">3</span>
<span id="L44" class="LineNr"> 44 </span>]
<span id="L45" class="LineNr"> 45 </span><span class="traceContains">+error: <a href='000organization.cc.html#L113'>main</a>: too few ingredients in '1:point &lt;- merge 3'</span>
<span id="L46" class="LineNr"> 46 </span>
<span id="L47" class="LineNr"> 47 </span><span class="Delimiter">:(scenario merge_check_extra_element)</span>
<span id="L48" class="LineNr"> 48 </span><span class="Special">% Hide_errors = true;</span>
<span id="L49" class="LineNr"> 49 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L50" class="LineNr"> 50 </span>  <span class="Constant">1</span>:point<span class="Special"> &lt;- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span><span class="Delimiter">,</span> <span class="Constant">5</span>
<span id="L51" class="LineNr"> 51 </span>]
<span id="L52" class="LineNr"> 52 </span><span class="traceContains">+error: <a href='000organization.cc.html#L113'>main</a>: too many ingredients in '1:point &lt;- merge 3, 4, 5'</span>
<span id="L53" class="LineNr"> 53 </span>
<span id="L54" class="LineNr"> 54 </span><span class="Comment">//: We want to avoid causing memory corruption, but other than that we want to</span>
<span id="L55" class="LineNr"> 55 </span><span class="Comment">//: be flexible in how we construct containers of containers. It should be</span>
<span id="L56" class="LineNr"> 56 </span><span class="Comment">//: equally easy to define a container out of primitives or intermediate</span>
<span id="L57" class="LineNr"> 57 </span><span class="Comment">//: container fields.</span>
<span id="L58" class="LineNr"> 58 </span>
<span id="L59" class="LineNr"> 59 </span><span class="Delimiter">:(scenario merge_check_recursive_containers)</span>
<span id="L60" class="LineNr"> 60 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L61" class="LineNr"> 61 </span>  <span class="Constant">1</span>:point<span class="Special"> &lt;- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L62" class="LineNr"> 62 </span>  <span class="Constant">1</span>:point-number<span class="Special"> &lt;- </span>merge <span class="Constant">1</span>:point<span class="Delimiter">,</span> <span class="Constant">5</span>
<span id="L63" class="LineNr"> 63 </span>]
<span id="L64" class="LineNr"> 64 </span>$error: <span class="Constant">0</span>
<span id="L65" class="LineNr"> 65 </span>
<span id="L66" class="LineNr"> 66 </span><span class="Delimiter">:(scenario merge_check_recursive_containers_2)</span>
<span id="L67" class="LineNr"> 67 </span><span class="Special">% Hide_errors = true;</span>
<span id="L68" class="LineNr"> 68 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L69" class="LineNr"> 69 </span>  <span class="Constant">1</span>:point<span class="Special"> &lt;- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L70" class="LineNr"> 70 </span>  <span class="Constant">2</span>:point-number<span class="Special"> &lt;- </span>merge <span class="Constant">1</span>:point
<span id="L71" class="LineNr"> 71 </span>]
<span id="L72" class="LineNr"> 72 </span><span class="traceContains">+error: <a href='000organization.cc.html#L113'>main</a>: too few ingredients in '2:point-number &lt;- merge 1:point'</span>
<span id="L73" class="LineNr"> 73 </span>
<span id="L74" class="LineNr"> 74 </span><span class="Delimiter">:(scenario merge_check_recursive_containers_3)</span>
<span id="L75" class="LineNr"> 75 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L76" class="LineNr"> 76 </span>  <span class="Constant">1</span>:point-number<span class="Special"> &lt;- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span><span class="Delimiter">,</span> <span class="Constant">5</span>
<span id="L77" class="LineNr"> 77 </span>]
<span id="L78" class="LineNr"> 78 </span>$error: <span class="Constant">0</span>
<span id="L79" class="LineNr"> 79 </span>
<span id="L80" class="LineNr"> 80 </span><span class="Delimiter">:(scenario merge_check_recursive_containers_4)</span>
<span id="L81" class="LineNr"> 81 </span><span class="Special">% Hide_errors = true;</span>
<span id="L82" class="LineNr"> 82 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L83" class="LineNr"> 83 </span>  <span class="Constant">1</span>:point-number<span class="Special"> &lt;- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L84" class="LineNr"> 84 </span>]
<span id="L85" class="LineNr"> 85 </span><span class="traceContains">+error: <a href='000organization.cc.html#L113'>main</a>: too few ingredients in '1:point-number &lt;- merge 3, 4'</span>
<span id="L86" class="LineNr"> 86 </span>
<span id="L87" class="LineNr"> 87 </span><span class="Delimiter">:(scenario merge_check_reflexive)</span>
<span id="L88" class="LineNr"> 88 </span><span class="Special">% Hide_errors = true;</span>
<span id="L89" class="LineNr"> 89 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L90" class="LineNr"> 90 </span>  <span class="Constant">1</span>:point<span class="Special"> &lt;- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L91" class="LineNr"> 91 </span>  <span class="Constant">2</span>:point<span class="Special"> &lt;- </span>merge <span class="Constant">1</span>:point
<span id="L92" class="LineNr"> 92 </span>]
<span id="L93" class="LineNr"> 93 </span>$error: <span class="Constant">0</span>
<span id="L94" class="LineNr"> 94 </span>
<span id="L95" class="LineNr"> 95 </span><span class="Comment">//: Since a container can be merged in several ways, we need to be able to</span>
<span id="L96" class="LineNr"> 96 </span><span class="Comment">//: backtrack through different possibilities. Later we'll allow creating</span>
<span id="L97" class="LineNr"> 97 </span><span class="Comment">//: exclusive containers which contain just one of rather than all of their</span>
<span id="L98" class="LineNr"> 98 </span><span class="Comment">//: elements. That will also require backtracking capabilities. Here's the</span>
<span id="L99" class="LineNr"> 99 </span><span class="Comment">//: state we need to maintain for backtracking:</span>
<span id="L100" class="LineNr">100 </span>
<span id="L101" class="LineNr">101 </span><span class="Delimiter">:(before &quot;End Types&quot;)</span>
<span id="L102" class="LineNr">102 </span><span class="Normal">struct</span> merge_check_point <span class="Delimiter">{</span>
<span id="L103" class="LineNr">103 </span>  reagent container<span class="Delimiter">;</span>
<span id="L104" class="LineNr">104 </span>  <span class="Normal">int</span> container_element_index<span class="Delimiter">;</span>
<span id="L105" class="LineNr">105 </span>  merge_check_point<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; c<span class="Delimiter">,</span> <span class="Normal">int</span> i<span class="Delimiter">)</span> :container<span class="Delimiter">(</span>c<span class="Delimiter">),</span> container_element_index<span class="Delimiter">(</span>i<span class="Delimiter">)</span> <span class="Delimiter">{}</span>
<span id="L106" class="LineNr">106 </span><span class="Delimiter">};</span>
<span id="L107" class="LineNr">107 </span>
<span id="L108" class="LineNr">108 </span><span class="Normal">struct</span> <a href='031merge.cc.html#L108'>merge_check_state</a> <span class="Delimiter">{</span>
<span id="L109" class="LineNr">109 </span>  stack&lt;merge_check_point&gt; data<span class="Delimiter">;</span>
<span id="L110" class="LineNr">110 </span><span class="Delimiter">};</span>
<span id="L111" class="LineNr">111 </span>
<span id="L112" class="LineNr">112 </span><span class="Delimiter">:(before &quot;End Checks&quot;)</span>
<span id="L113" class="LineNr">113 </span><span class="Special">Transform</span><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='031merge.cc.html#L115'>check_merge_calls</a><span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
<span id="L114" class="LineNr">114 </span><span class="Delimiter">:(code)</span>
<span id="L115" class="LineNr">115 </span><span class="Normal">void</span> <a href='031merge.cc.html#L115'>check_merge_calls</a><span class="Delimiter">(</span><span class="Normal">const</span> <a href='010vm.cc.html#L14'>recipe_ordinal</a> r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L116" class="LineNr">116 </span>  <span class="Normal">const</span> recipe&amp; caller = get<span class="Delimiter">(</span><span class="Special">Recipe</span><span class="Delimiter">,</span> r<span class="Delimiter">);</span>
<span id="L117" class="LineNr">117 </span>  <a href='003trace.cc.html#L189'>trace</a><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;--- type-check merge instructions in <a href='010vm.cc.html#L19'>recipe</a> &quot;</span> &lt;&lt; caller<span class="Delimiter">.</span>name &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L118" class="LineNr">118 </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; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L119" class="LineNr">119 </span>    <span class="Normal">const</span> instruction&amp; inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L120" class="LineNr">120 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name != <span class="Constant">&quot;merge&quot;</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L121" class="LineNr">121 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L122" class="LineNr">122 </span>      <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'merge' should yield a single product in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L123" class="LineNr">123 </span>      <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L124" class="LineNr">124 </span>    <span class="Delimiter">}</span>
<span id="L125" class="LineNr">125 </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 id="L126" class="LineNr">126 </span>    <span class="Comment">// Update product While Type-checking Merge</span>
<span id="L127" class="LineNr">127 </span>    <span class="Normal">const</span> type_tree* product_base_type = product<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>atom ? product<span class="Delimiter">.</span>type : product<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">;</span>
<span id="L128" class="LineNr">128 </span>    assert<span class="Delimiter">(</span>product_base_type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">);</span>
<span id="L129" class="LineNr">129 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>product_base_type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span> || !contains_key<span class="Delimiter">(</span><span class="Special">Type</span><span class="Delimiter">,</span> product_base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L130" class="LineNr">130 </span>      <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'merge' should yield a container in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L131" class="LineNr">131 </span>      <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L132" class="LineNr">132 </span>    <span class="Delimiter">}</span>
<span id="L133" class="LineNr">133 </span>    <span class="Normal">const</span> type_info&amp; info = get<span class="Delimiter">(</span><span class="Special">Type</span><span class="Delimiter">,</span> product_base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
<span id="L134" class="LineNr">134 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>kind != <a href='010vm.cc.html#L180'>CONTAINER</a> &amp;&amp; info<span class="Delimiter">.</span>kind != <a href='010vm.cc.html#L181'>EXCLUSIVE_CONTAINER</a><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L135" class="LineNr">135 </span>      <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'merge' should yield a container in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L136" class="LineNr">136 </span>      <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L137" class="LineNr">137 </span>    <span class="Delimiter">}</span>
<span id="L138" class="LineNr">138 </span>    <a href='031merge.cc.html#L142'>check_merge_call</a><span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">,</span> product<span class="Delimiter">,</span> caller<span class="Delimiter">,</span> inst<span class="Delimiter">);</span>
<span id="L139" class="LineNr">139 </span>  <span class="Delimiter">}</span>
<span id="L140" class="LineNr">140 </span><span class="Delimiter">}</span>
<span id="L141" class="LineNr">141 </span>
<span id="L142" class="LineNr">142 </span><span class="Normal">void</span> <a href='031merge.cc.html#L142'>check_merge_call</a><span class="Delimiter">(</span><span class="Normal">const</span> vector&lt;reagent&gt;&amp; ingredients<span class="Delimiter">,</span> <span class="Normal">const</span> reagent&amp; product<span class="Delimiter">,</span> <span class="Normal">const</span> recipe&amp; caller<span class="Delimiter">,</span> <span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L143" class="LineNr">143 </span>  <span class="Normal">int</span> ingredient_index = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L144" class="LineNr">144 </span>  <a href='031merge.cc.html#L108'>merge_check_state</a> state<span class="Delimiter">;</span>
<span id="L145" class="LineNr">145 </span>  state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>push<span class="Delimiter">(</span>merge_check_point<span class="Delimiter">(</span>product<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">));</span>
<span id="L146" class="LineNr">146 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L147" class="LineNr">147 </span>    assert<span class="Delimiter">(</span>!state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
<span id="L148" class="LineNr">148 </span>    <a href='003trace.cc.html#L189'>trace</a><span class="Delimiter">(</span><span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; ingredient_index &lt;&lt; <span class="Constant">&quot; vs &quot;</span> &lt;&lt; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">)</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L149" class="LineNr">149 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>ingredient_index &gt;= <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L150" class="LineNr">150 </span>      <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;too few ingredients in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L151" class="LineNr">151 </span>      <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L152" class="LineNr">152 </span>    <span class="Delimiter">}</span>
<span id="L153" class="LineNr">153 </span>    reagent&amp; container = state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container<span class="Delimiter">;</span>
<span id="L154" class="LineNr">154 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>!container<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>  <span class="Comment">// error handled elsewhere</span>
<span id="L155" class="LineNr">155 </span>    <span class="Normal">const</span> type_tree* top_root_type = container<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>atom ? container<span class="Delimiter">.</span>type : container<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">;</span>
<span id="L156" class="LineNr">156 </span>    assert<span class="Delimiter">(</span>top_root_type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">);</span>
<span id="L157" class="LineNr">157 </span>    type_info&amp; container_info = get<span class="Delimiter">(</span><span class="Special">Type</span><span class="Delimiter">,</span> top_root_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
<span id="L158" class="LineNr">158 </span>    <span class="Normal">switch</span> <span class="Delimiter">(</span>container_info<span class="Delimiter">.</span>kind<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L159" class="LineNr">159 </span>      <span class="Normal">case</span> <a href='010vm.cc.html#L180'>CONTAINER</a>: <span class="Delimiter">{</span>
<span id="L160" class="LineNr">160 </span>        <span class="Comment">// degenerate case: merge with the same type always succeeds</span>
<span id="L161" class="LineNr">161 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index == <span class="Constant">0</span> &amp;&amp; <a href='021check_instruction.cc.html#L91'>types_coercible</a><span class="Delimiter">(</span>container<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">)))</span>
<span id="L162" class="LineNr">162 </span>          <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L163" class="LineNr">163 </span>        <span class="Normal">const</span> reagent&amp; expected_ingredient = <a href='030container.cc.html#L212'>element_type</a><span class="Delimiter">(</span>container<span class="Delimiter">.</span>type<span class="Delimiter">,</span> state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index<span class="Delimiter">);</span>
<span id="L164" class="LineNr">164 </span>        <a href='003trace.cc.html#L189'>trace</a><span class="Delimiter">(</span><span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;checking container &quot;</span> &lt;&lt; <a href='028call_return.cc.html#L163'>to_string</a><span class="Delimiter">(</span>container<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; || &quot;</span> &lt;&lt; <a href='028call_return.cc.html#L163'>to_string</a><span class="Delimiter">(</span>expected_ingredient<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; vs ingredient &quot;</span> &lt;&lt; ingredient_index &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L165" class="LineNr">165 </span>        <span class="Comment">// if the current element is the ingredient we expect, move on to the next element/ingredient</span>
<span id="L166" class="LineNr">166 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span><a href='021check_instruction.cc.html#L91'>types_coercible</a><span class="Delimiter">(</span>expected_ingredient<span class="Delimiter">,</span> ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L167" class="LineNr">167 </span>          ++ingredient_index<span class="Delimiter">;</span>
<span id="L168" class="LineNr">168 </span>          ++state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index<span class="Delimiter">;</span>
<span id="L169" class="LineNr">169 </span>          <span class="Normal">while</span> <span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index &gt;= <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>get<span class="Delimiter">(</span><span class="Special">Type</span><span class="Delimiter">,</span> get_base_type<span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container<span class="Delimiter">.</span>type<span class="Delimiter">)-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L170" class="LineNr">170 </span>            state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>pop<span class="Delimiter">();</span>
<span id="L171" class="LineNr">171 </span>            <span class="Normal">if</span> <span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L172" class="LineNr">172 </span>              <span class="Normal">if</span> <span class="Delimiter">(</span>ingredient_index &lt; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">))</span>
<span id="L173" class="LineNr">173 </span>                <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;too many ingredients in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L174" class="LineNr">174 </span>              <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L175" class="LineNr">175 </span>            <span class="Delimiter">}</span>
<span id="L176" class="LineNr">176 </span>            ++state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index<span class="Delimiter">;</span>
<span id="L177" class="LineNr">177 </span>          <span class="Delimiter">}</span>
<span id="L178" class="LineNr">178 </span>        <span class="Delimiter">}</span>
<span id="L179" class="LineNr">179 </span>        <span class="Comment">// if not, maybe it's a field of the current element</span>
<span id="L180" class="LineNr">180 </span>        <span class="Normal">else</span> <span class="Delimiter">{</span>
<span id="L181" class="LineNr">181 </span>          <span class="Comment">// no change to ingredient_index</span>
<span id="L182" class="LineNr">182 </span>          state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>push<span class="Delimiter">(</span>merge_check_point<span class="Delimiter">(</span>expected_ingredient<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">));</span>
<span id="L183" class="LineNr">183 </span>        <span class="Delimiter">}</span>
<span id="L184" class="LineNr">184 </span>        <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L185" class="LineNr">185 </span>      <span class="Delimiter">}</span>
<span id="L186" class="LineNr">186 </span>      <span class="Comment">// End check_merge_call Special-cases</span>
<span id="L187" class="LineNr">187 </span>      <span class="Normal">default</span>: <span class="Delimiter">{</span>
<span id="L188" class="LineNr">188 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>container<span class="Delimiter">,</span> ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L189" class="LineNr">189 </span>          <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;incorrect type of ingredient &quot;</span> &lt;&lt; ingredient_index &lt;&lt; <span class="Constant">&quot; in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L190" class="LineNr">190 </span>          <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <span class="Constant">&quot;  (expected '&quot;</span> &lt;&lt; debug_string<span class="Delimiter">(</span>container<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;')\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L191" class="LineNr">191 </span>          <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <span class="Constant">&quot;  (got '&quot;</span> &lt;&lt; debug_string<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">))</span> &lt;&lt; <span class="Constant">&quot;')\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L192" class="LineNr">192 </span>          <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L193" class="LineNr">193 </span>        <span class="Delimiter">}</span>
<span id="L194" class="LineNr">194 </span>        ++ingredient_index<span class="Delimiter">;</span>
<span id="L195" class="LineNr">195 </span>        <span class="Comment">// ++state.data.top().container_element_index;  // unnecessary, but wouldn't do any harm</span>
<span id="L196" class="LineNr">196 </span>        <span class="Normal">do</span> <span class="Delimiter">{</span>
<span id="L197" class="LineNr">197 </span>          state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>pop<span class="Delimiter">();</span>
<span id="L198" class="LineNr">198 </span>          <span class="Normal">if</span> <span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L199" class="LineNr">199 </span>            <span class="Normal">if</span> <span class="Delimiter">(</span>ingredient_index &lt; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">))</span>
<span id="L200" class="LineNr">200 </span>              <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;too many ingredients in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L201" class="LineNr">201 </span>            <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L202" class="LineNr">202 </span>          <span class="Delimiter">}</span>
<span id="L203" class="LineNr">203 </span>          ++state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index<span class="Delimiter">;</span>
<span id="L204" class="LineNr">204 </span>        <span class="Delimiter">}</span> <span class="Normal">while</span> <span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index &gt;= <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>get<span class="Delimiter">(</span><span class="Special">Type</span><span class="Delimiter">,</span> get_base_type<span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container<span class="Delimiter">.</span>type<span class="Delimiter">)-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">));</span>
<span id="L205" class="LineNr">205 </span>      <span class="Delimiter">}</span>
<span id="L206" class="LineNr">206 </span>    <span class="Delimiter">}</span>
<span id="L207" class="LineNr">207 </span>  <span class="Delimiter">}</span>
<span id="L208" class="LineNr">208 </span>  <span class="Comment">// never gets here</span>
<span id="L209" class="LineNr">209 </span>  assert<span class="Delimiter">(</span><span class="Constant">false</span><span class="Delimiter">);</span>
<span id="L210" class="LineNr">210 </span><span class="Delimiter">}</span>
<span id="L211" class="LineNr">211 </span>
<span id="L212" class="LineNr">212 </span><span class="Comment">//: replaced in a later layer</span>
<span id="L213" class="LineNr">213 </span><span class="Comment">//: todo: find some clean way to take this call completely out of this layer</span>
<span id="L214" class="LineNr">214 </span><span class="Normal">const</span> type_tree* get_base_type<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* t<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L215" class="LineNr">215 </span>  <span class="Identifier">return</span> t<span class="Delimiter">;</span>
<span id="L216" class="LineNr">216 </span><span class="Delimiter">}</span>
<span id="L217" class="LineNr">217 </span>
<span id="L218" class="LineNr">218 </span><span class="Delimiter">:(scenario merge_check_product)</span>
<span id="L219" class="LineNr">219 </span><span class="Special">% Hide_errors = true;</span>
<span id="L220" class="LineNr">220 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L221" class="LineNr">221 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>merge <span class="Constant">3</span>
<span id="L222" class="LineNr">222 </span>]
<span id="L223" class="LineNr">223 </span><span class="traceContains">+error: <a href='000organization.cc.html#L113'>main</a>: 'merge' should yield a container in '1:num &lt;- merge 3'</span>
<span id="L224" class="LineNr">224 </span>
<span id="L225" class="LineNr">225 </span><span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span id="L226" class="LineNr">226 </span><span class="Comment">#include &lt;stack&gt;</span>
<span id="L227" class="LineNr">227 </span><span class="Normal">using</span> std::stack<span class="Delimiter">;</span>
</pre>
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