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<span class="Comment">//: Since different layers all carve out different parts of various namespaces</span>
<span class="Comment">//: (recipes, memory, etc.) for their own use, there's no previous place where</span>
<span class="Comment">//: we can lay out the big picture of what uses what. So we'll do that here</span>
<span class="Comment">//: and just have to manually remember to update it when we move boundaries</span>
<span class="Comment">//: around.</span>
<span class="Comment">//:</span>
<span class="SalientComment">//:: Memory</span>
<span class="Comment">//:</span>
<span class="Comment">//: Location 0 - unused (since it can help uncover bugs)</span>
<span class="Comment">//: Locations 1-899 - reserved for tests</span>
<span class="Comment">//: Locations 900-999 - reserved for predefined globals in mu scenarios, like keyboard, screen, etc.</span>
<span class="Delimiter">:(before "End Setup")</span>
assert<span class="Delimiter">(</span>Max_variables_in_scenarios == <span class="Constant">900</span><span class="Delimiter">);</span>
<span class="Comment">//: Locations 1000 ('Reserved_for_tests') onward - available to the allocator in chunks of size Initial_memory_per_routine.</span>
assert<span class="Delimiter">(</span>Reserved_for_tests == <span class="Constant">1000</span><span class="Delimiter">);</span>
<span class="SalientComment">//:: Recipes</span>
<span class="Comment">//:</span>
<span class="Comment">//: 0 - unused (IDLE; do nothing)</span>
<span class="Comment">//: 1-199 - primitives</span>
assert<span class="Delimiter">(</span>MAX_PRIMITIVE_RECIPES < <span class="Constant">200</span><span class="Delimiter">);</span>
<span class="Comment">//: 200-999 - defined in .mu files as sequences of primitives</span>
assert<span class="Delimiter">(</span>Next_recipe_ordinal == <span class="Constant">1000</span><span class="Delimiter">);</span>
<span class="Comment">//: 1000 onwards - reserved for tests, cleared between tests</span>
<span class="SalientComment">//:: Depths for tracing</span>
<span class="Comment">//:</span>
<span class="Comment">//: 0 - unused</span>
<span class="Comment">//: 1-100 - app-level trace statements in mu</span>
<span class="Comment">//: 101-9989 - call-stack statements (mostly label run)</span>
assert<span class="Delimiter">(</span>Initial_callstack_depth == <span class="Constant">101</span><span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>Max_callstack_depth == <span class="Constant">9989</span><span class="Delimiter">);</span>
<span class="Comment">//: 9990-9999 - intra-instruction lines (mostly label mem)</span>
<span class="SalientComment">//:: Summary of transforms and their dependencies</span>
<span class="Comment">//: begin transforms</span>
<span class="Comment">//: begin instruction inserting transforms</span>
<span class="Comment">//: 52 insert fragments</span>
<span class="Comment">//: ↳ 52.2 check fragments</span>
<span class="Comment">//: ---</span>
<span class="Comment">//: 53 rewrite 'stash' instructions</span>
<span class="Comment">//: end instruction inserting transforms</span>
<span class="Comment">//:</span>
<span class="Comment">//: begin instruction modifying transforms</span>
<span class="Comment">//: 56.2 check header ingredients</span>
<span class="Comment">//: ↳ 56.4 fill in return ingredients</span>
<span class="Comment">//: 48 check or set types by name</span>
<span class="Comment">//:</span>
<span class="Comment">//: begin type modifying transforms</span>
<span class="Comment">//: 56.3 deduce types from header</span>
<span class="Comment">//: ---</span>
<span class="Comment">//: 30 check or set invalid containers</span>
<span class="Comment">//: end type modifying transforms</span>
<span class="Comment">//: ↱ 46 collect surrounding spaces</span>
<span class="Comment">//: ↳ 42 transform names</span>
<span class="Comment">//: ↳ 57 static dispatch</span>
<span class="Comment">//: ---</span>
<span class="Comment">//: 13 update instruction operation</span>
<span class="Comment">//: 40 transform braces</span>
<span class="Comment">//: 41 transform labels</span>
<span class="Comment">//: end instruction modifying transforms</span>
<span class="Comment">//: ↳ 60 check immutable ingredients</span>
<span class="Comment">//:</span>
<span class="Comment">//: begin checks</span>
<span class="Comment">//: ---</span>
<span class="Comment">//: 21 check instruction</span>
<span class="Comment">//: ↳ 61 check indirect calls against header</span>
<span class="Comment">//: ↳ 56 check calls against header</span>
<span class="Comment">//: ↳ 43 transform 'new' to 'allocate'</span>
<span class="Comment">//: 30 check merge calls</span>
<span class="Comment">//: 36 check types of return instructions</span>
<span class="Comment">//: 43 check default space</span>
<span class="Comment">//: 56 check return instructions against header</span>
<span class="Comment">//: end checks</span>
<span class="Comment">//: end transforms</span>
<span class="SalientComment">//:: Summary of type-checking in different phases</span>
<span class="Comment">//: when dispatching instructions we accept first recipe that:</span>
<span class="Comment">//: strictly matches all types</span>
<span class="Comment">//: maps literal 0 or literal 1 to boolean for some ingredients</span>
<span class="Comment">//: performs some other acceptable type conversion</span>
<span class="Comment">//: literal 0 -> address</span>
<span class="Comment">//: literal -> character</span>
<span class="Comment">//: when checking instructions we ensure that types match, and that literals map to some scalar</span>
<span class="Comment">//: (address can only map to literal 0)</span>
<span class="Comment">//: (boolean can only map to literal 0 or literal 1)</span>
<span class="Comment">//: (but conditionals can take any scalar)</span>
<span class="Comment">//: at runtime we perform no checks</span>
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