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diff --git a/html/033exclusive_container.cc.html b/html/033exclusive_container.cc.html new file mode 100644 index 00000000..90f47d3a --- /dev/null +++ b/html/033exclusive_container.cc.html @@ -0,0 +1,466 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> +<html> +<head> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<title>Mu - 033exclusive_container.cc</title> +<meta name="Generator" content="Vim/7.4"> +<meta name="plugin-version" content="vim7.4_v2"> +<meta name="syntax" content="cpp"> +<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy="> +<meta name="colorscheme" content="minimal"> +<style type="text/css"> +<!-- +pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; } +body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color: #080808; } +* { font-size: 12pt; font-size: 1em; } +.Constant { color: #00a0a0; } +.cSpecial { color: #008000; } +.traceContains { color: #008000; } +.SalientComment { color: #00ffff; } +.Comment { color: #9090ff; } +.Delimiter { color: #800080; } +.Special { color: #c00000; } +.Identifier { color: #fcb165; } +.Normal { color: #eeeeee; background-color: #080808; padding-bottom: 1px; } +--> +</style> + +<script type='text/javascript'> +<!-- + +--> +</script> +</head> +<body> +<pre id='vimCodeElement'> +<span class="Comment">//: Exclusive containers contain exactly one of a fixed number of 'variants'</span> +<span class="Comment">//: of different types.</span> +<span class="Comment">//:</span> +<span class="Comment">//: They also implicitly contain a tag describing precisely which variant is</span> +<span class="Comment">//: currently stored in them.</span> + +<span class="Delimiter">:(before "End Mu Types Initialization")</span> +<span class="Comment">//: We'll use this container as a running example, with two number elements.</span> +<span class="Delimiter">{</span> +type_ordinal tmp = put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"number-or-point"</span><span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span> +get_or_insert<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> tmp<span class="Delimiter">);</span> <span class="Comment">// initialize</span> +get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> tmp<span class="Delimiter">).</span>kind = EXCLUSIVE_CONTAINER<span class="Delimiter">;</span> +get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> tmp<span class="Delimiter">).</span>name = <span class="Constant">"number-or-point"</span><span class="Delimiter">;</span> +get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> tmp<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">"i:number"</span><span class="Delimiter">));</span> +get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> tmp<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">"p:point"</span><span class="Delimiter">));</span> +<span class="Delimiter">}</span> + +<span class="Comment">//: Tests in this layer often explicitly set up memory before reading it as an</span> +<span class="Comment">//: array. Don't do this in general. I'm tagging exceptions with /raw to keep</span> +<span class="Comment">//: checks in future layers from flagging them.</span> +<span class="Delimiter">:(scenario copy_exclusive_container)</span> +<span class="Comment"># Copying exclusive containers copies all their contents and an extra location for the tag.</span> +def main [ + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">1</span> <span class="Comment"># 'point' variant</span> + <span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">34</span> + <span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">35</span> + <span class="Constant">4</span>:number-<span class="Normal">or</span>-point<span class="Special"> <- </span>copy <span class="Constant">1</span>:number-<span class="Normal">or</span>-point/unsafe +] +<span class="traceContains">+mem: storing 1 in location 4</span> +<span class="traceContains">+mem: storing 34 in location 5</span> +<span class="traceContains">+mem: storing 35 in location 6</span> + +<span class="Delimiter">:(before "End size_of(type) Cases")</span> +<span class="Normal">if</span> <span class="Delimiter">(</span>t<span class="Delimiter">.</span>kind == EXCLUSIVE_CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Comment">// Compute size_of Exclusive Container</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">:(before "End compute_container_sizes Cases")</span> +<span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>kind == EXCLUSIVE_CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span> + container_metadata metadata<span class="Delimiter">;</span> + <span class="Comment">// size of an exclusive container is the size of its largest variant</span> + <span class="Comment">// (So like containers, it can't contain arrays.)</span> + <span class="Normal">int</span> size = <span class="Constant">0</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 < SIZE<span class="Delimiter">(</span>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 = info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span> + <span class="Comment">// Compute Exclusive Container Size(element)</span> + compute_container_sizes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">);</span> + <span class="Normal">int</span> variant_size = size_of<span class="Delimiter">(</span>element<span class="Delimiter">);</span> + <span class="Normal">if</span> <span class="Delimiter">(</span>variant_size > size<span class="Delimiter">)</span> size = variant_size<span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Comment">// ...+1 for its tag.</span> + metadata<span class="Delimiter">.</span>size = size+<span class="Constant">1</span><span class="Delimiter">;</span> + Container_metadata<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair<type_tree*<span class="Delimiter">,</span> container_metadata><span class="Delimiter">(</span><span class="Normal">new</span> type_tree<span class="Delimiter">(</span>*type<span class="Delimiter">),</span> metadata<span class="Delimiter">));</span> +<span class="Delimiter">}</span> + +<span class="SalientComment">//:: To access variants of an exclusive container, use 'maybe-convert'.</span> +<span class="Comment">//: It always returns an address (so that you can modify it) or null (to</span> +<span class="Comment">//: signal that the conversion failed (because the container contains a</span> +<span class="Comment">//: different variant).</span> + +<span class="Comment">//: 'maybe-convert' requires a literal in ingredient 1. We'll use a synonym</span> +<span class="Comment">//: called 'variant'.</span> +<span class="Delimiter">:(before "End Mu Types Initialization")</span> +put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"variant"</span><span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span> + +<span class="Delimiter">:(scenario maybe_convert)</span> +def main [ + <span class="Constant">12</span>:number<span class="Special"> <- </span>copy <span class="Constant">1</span> + <span class="Constant">13</span>:number<span class="Special"> <- </span>copy <span class="Constant">35</span> + <span class="Constant">14</span>:number<span class="Special"> <- </span>copy <span class="Constant">36</span> + <span class="Constant">20</span>:point<span class="Delimiter">,</span> <span class="Constant">22</span>:boolean<span class="Special"> <- </span>maybe-convert <span class="Constant">12</span>:number-<span class="Normal">or</span>-point/unsafe<span class="Delimiter">,</span> <span class="Constant">1</span>:variant +] +<span class="Comment"># boolean</span> +<span class="traceContains">+mem: storing 1 in location 22</span> +<span class="Comment"># point</span> +<span class="traceContains">+mem: storing 35 in location 20</span> +<span class="traceContains">+mem: storing 36 in location 21</span> + +<span class="Delimiter">:(scenario maybe_convert_fail)</span> +def main [ + <span class="Constant">12</span>:number<span class="Special"> <- </span>copy <span class="Constant">1</span> + <span class="Constant">13</span>:number<span class="Special"> <- </span>copy <span class="Constant">35</span> + <span class="Constant">14</span>:number<span class="Special"> <- </span>copy <span class="Constant">36</span> + <span class="Constant">20</span>:number<span class="Delimiter">,</span> <span class="Constant">21</span>:boolean<span class="Special"> <- </span>maybe-convert <span class="Constant">12</span>:number-<span class="Normal">or</span>-point/unsafe<span class="Delimiter">,</span> <span class="Constant">0</span>:variant +] +<span class="Comment"># boolean</span> +<span class="traceContains">+mem: storing 0 in location 21</span> +<span class="Comment"># number: no write</span> + +<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span> +MAYBE_CONVERT<span class="Delimiter">,</span> +<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span> +put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"maybe-convert"</span><span class="Delimiter">,</span> MAYBE_CONVERT<span class="Delimiter">);</span> +<span class="Delimiter">:(before "End Primitive Recipe Checks")</span> +<span class="Normal">case</span> MAYBE_CONVERT: <span class="Delimiter">{</span> + <span class="Normal">const</span> recipe& caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<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 << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"'maybe-convert' expects exactly 2 ingredients in '"</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << 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 MAYBE_CONVERT base in Check</span> + <span class="Normal">if</span> <span class="Delimiter">(</span>!base<span class="Delimiter">.</span>type || !base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value || get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value<span class="Delimiter">).</span>kind != EXCLUSIVE_CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span> + raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"first ingredient of 'maybe-convert' should be an exclusive-container, but got '"</span> << base<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << 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>!is_literal<span class="Delimiter">(</span>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="Delimiter">{</span> + raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"second ingredient of 'maybe-convert' should have type 'variant', but got '"</span> << 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 << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << 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="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">)</span> != <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> + raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"'maybe-convert' expects exactly 2 products in '"</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << 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> 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 MAYBE_CONVERT product in Check</span> + reagent& 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> + populate_value<span class="Delimiter">(</span>offset<span class="Delimiter">);</span> + <span class="Normal">if</span> <span class="Delimiter">(</span>offset<span class="Delimiter">.</span>value >= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Delimiter">{</span> + raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"invalid tag "</span> << offset<span class="Delimiter">.</span>value << <span class="Constant">" in '"</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Normal">const</span> reagent& variant = variant_type<span class="Delimiter">(</span>base<span class="Delimiter">,</span> offset<span class="Delimiter">.</span>value<span class="Delimiter">);</span> + <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>product<span class="Delimiter">,</span> variant<span class="Delimiter">))</span> <span class="Delimiter">{</span> + raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"'maybe-convert "</span> << base<span class="Delimiter">.</span>original_string << <span class="Constant">", "</span> << 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 << <span class="Constant">"' should write to "</span> << to_string<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>type<span class="Delimiter">)</span> << <span class="Constant">" but '"</span> << product<span class="Delimiter">.</span>name << <span class="Constant">"' has type "</span> << to_string<span class="Delimiter">(</span>product<span class="Delimiter">.</span>type<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span> << 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> status = inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span> + <span class="Comment">// Update MAYBE_CONVERT status in Check</span> + <span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_boolean<span class="Delimiter">(</span>status<span class="Delimiter">))</span> <span class="Delimiter">{</span> + raise << 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> << <span class="Constant">"second product yielded by 'maybe-convert' should be a boolean, but tried to write to '"</span> << inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << 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 "End Primitive Recipe Implementations")</span> +<span class="Normal">case</span> MAYBE_CONVERT: <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 MAYBE_CONVERT 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 << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"tried to access location 0 in '"</span> << to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Normal">int</span> tag = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>value<span class="Delimiter">;</span> + reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> product = current_instruction<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 MAYBE_CONVERT product in Run</span> + reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> status = current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span> + <span class="Comment">// Update MAYBE_CONVERT status in Run</span> + <span class="Comment">// optimization: directly write results to only update first product when necessary</span> + <span class="Normal">if</span> <span class="Delimiter">(</span>tag == <span class="Normal">static_cast</span><<span class="Normal">int</span>><span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> base_address<span class="Delimiter">)))</span> <span class="Delimiter">{</span> + <span class="Normal">const</span> reagent& variant = variant_type<span class="Delimiter">(</span>base<span class="Delimiter">,</span> tag<span class="Delimiter">);</span> + trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"storing 1 in location "</span> << status<span class="Delimiter">.</span>value << end<span class="Delimiter">();</span> + put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> status<span class="Delimiter">.</span>value<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span> + <span class="Comment">// Write Memory in Successful MAYBE_CONVERT 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 < size_of<span class="Delimiter">(</span>variant<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Normal">double</span> val = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> base_address+<span class="Comment">/*</span><span class="Comment">skip tag</span><span class="Comment">*/</span><span class="Constant">1</span>+i<span class="Delimiter">);</span> + trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"storing "</span> << no_scientific<span class="Delimiter">(</span>val<span class="Delimiter">)</span> << <span class="Constant">" in location "</span> << product<span class="Delimiter">.</span>value+i << end<span class="Delimiter">();</span> + put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> product<span class="Delimiter">.</span>value+i<span class="Delimiter">,</span> val<span class="Delimiter">);</span> + <span class="Delimiter">}</span> + <span class="Delimiter">}</span> + <span class="Normal">else</span> <span class="Delimiter">{</span> + trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"storing 0 in location "</span> << status<span class="Delimiter">.</span>value << end<span class="Delimiter">();</span> + put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> status<span class="Delimiter">.</span>value<span class="Delimiter">,</span> <span class="Constant">0</span><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">:(code)</span> +<span class="Normal">const</span> reagent variant_type<span class="Delimiter">(</span><span class="Normal">const</span> reagent& base<span class="Delimiter">,</span> <span class="Normal">int</span> tag<span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Identifier">return</span> variant_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">,</span> tag<span class="Delimiter">);</span> +<span class="Delimiter">}</span> + +<span class="Normal">const</span> reagent variant_type<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">,</span> <span class="Normal">int</span> tag<span class="Delimiter">)</span> <span class="Delimiter">{</span> + assert<span class="Delimiter">(</span>tag >= <span class="Constant">0</span><span class="Delimiter">);</span> + assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-></span>value<span class="Delimiter">));</span> + assert<span class="Delimiter">(</span>!get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-></span>value<span class="Delimiter">).</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">());</span> + <span class="Normal">const</span> type_info& info = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-></span>value<span class="Delimiter">);</span> + assert<span class="Delimiter">(</span>info<span class="Delimiter">.</span>kind == EXCLUSIVE_CONTAINER<span class="Delimiter">);</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>tag<span class="Delimiter">);</span> + <span class="Comment">// End variant_type Special-cases</span> + <span class="Identifier">return</span> element<span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(scenario maybe_convert_product_type_mismatch)</span> +<span class="Special">% Hide_errors = true;</span> +def main [ + <span class="Constant">12</span>:number<span class="Special"> <- </span>copy <span class="Constant">1</span> + <span class="Constant">13</span>:number<span class="Special"> <- </span>copy <span class="Constant">35</span> + <span class="Constant">14</span>:number<span class="Special"> <- </span>copy <span class="Constant">36</span> + <span class="Constant">20</span>:number<span class="Delimiter">,</span> <span class="Constant">21</span>:boolean<span class="Special"> <- </span>maybe-convert <span class="Constant">12</span>:number-<span class="Normal">or</span>-point/unsafe<span class="Delimiter">,</span> <span class="Constant">1</span>:variant +] +<span class="traceContains">+error: main: 'maybe-convert 12:number-or-point/unsafe, 1:variant' should write to point but '20' has type number</span> + +<span class="SalientComment">//:: Allow exclusive containers to be defined in mu code.</span> + +<span class="Delimiter">:(scenario exclusive_container)</span> +exclusive-container foo [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:number +] +<span class="traceContains">+parse: --- defining exclusive-container foo</span> +<span class="traceContains">+parse: element: {x: "number"}</span> +<span class="traceContains">+parse: element: {y: "number"}</span> + +<span class="Delimiter">:(before "End Command Handlers")</span> +<span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>command == <span class="Constant">"exclusive-container"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> + insert_container<span class="Delimiter">(</span>command<span class="Delimiter">,</span> EXCLUSIVE_CONTAINER<span class="Delimiter">,</span> in<span class="Delimiter">);</span> +<span class="Delimiter">}</span> + +<span class="Comment">//: arrays are disallowed inside exclusive containers unless their length is</span> +<span class="Comment">//: fixed in advance</span> + +<span class="Delimiter">:(scenario exclusive_container_contains_array)</span> +exclusive-container foo [ + <span class="Normal">x</span>:array:number:<span class="Constant">3</span> +] +$error: <span class="Constant">0</span> + +<span class="Delimiter">:(scenario exclusive_container_disallows_dynamic_array_element)</span> +<span class="Special">% Hide_errors = true;</span> +exclusive-container foo [ + <span class="Normal">x</span>:array:number +] +<span class="traceContains">+error: container 'foo' cannot determine size of element 'x'</span> + +<span class="SalientComment">//:: To construct exclusive containers out of variant types, use 'merge'.</span> +<span class="Delimiter">:(scenario lift_to_exclusive_container)</span> +exclusive-container foo [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:number +] + +def main [ + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">34</span> + <span class="Constant">2</span>:foo<span class="Special"> <- </span>merge <span class="Constant">0</span>/x<span class="Delimiter">,</span> <span class="Constant">1</span>:number <span class="Comment"># tag must be a literal when merging exclusive containers</span> + <span class="Constant">4</span>:foo<span class="Special"> <- </span>merge <span class="Constant">1</span>/y<span class="Delimiter">,</span> <span class="Constant">1</span>:number +] +<span class="traceContains">+mem: storing 0 in location 2</span> +<span class="traceContains">+mem: storing 34 in location 3</span> +<span class="traceContains">+mem: storing 1 in location 4</span> +<span class="traceContains">+mem: storing 34 in location 5</span> + +<span class="Comment">//: type-checking for 'merge' on exclusive containers</span> + +<span class="Delimiter">:(scenario merge_handles_exclusive_container)</span> +exclusive-container foo [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:bar +] +container bar [ + <span class="Normal">z</span>:number +] +def main [ + <span class="Constant">1</span>:foo<span class="Special"> <- </span>merge <span class="Constant">0</span>/x<span class="Delimiter">,</span> <span class="Constant">34</span> +] +<span class="traceContains">+mem: storing 0 in location 1</span> +<span class="traceContains">+mem: storing 34 in location 2</span> +$error: <span class="Constant">0</span> + +<span class="Delimiter">:(scenario merge_requires_literal_tag_for_exclusive_container)</span> +<span class="Special">% Hide_errors = true;</span> +exclusive-container foo [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:bar +] +container bar [ + <span class="Normal">z</span>:number +] +def main [ + local-scope + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span> + <span class="Constant">2</span>:foo<span class="Special"> <- </span>merge <span class="Constant">1</span>:number<span class="Delimiter">,</span> <span class="Constant">34</span> +] +<span class="traceContains">+error: main: ingredient 0 of 'merge' should be a literal, for the tag of exclusive-container 'foo'</span> + +<span class="Delimiter">:(before "End valid_merge Cases")</span> +<span class="Normal">case</span> EXCLUSIVE_CONTAINER: <span class="Delimiter">{</span> + assert<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><span class="Delimiter">);</span> + trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"checking exclusive container "</span> << to_string<span class="Delimiter">(</span>container<span class="Delimiter">)</span> << <span class="Constant">" vs ingredient "</span> << ingredient_index << end<span class="Delimiter">();</span> + <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">)))</span> <span class="Delimiter">{</span> + raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"ingredient "</span> << ingredient_index << <span class="Constant">" of 'merge' should be a literal, for the tag of exclusive-container '"</span> << container_info<span class="Delimiter">.</span>name << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + <span class="Identifier">return</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> ingredient = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">);</span> <span class="Comment">// unnecessary copy just to keep this function from modifying caller</span> + populate_value<span class="Delimiter">(</span>ingredient<span class="Delimiter">);</span> + <span class="Normal">if</span> <span class="Delimiter">(</span>ingredient<span class="Delimiter">.</span>value >= SIZE<span class="Delimiter">(</span>container_info<span class="Delimiter">.</span>elements<span class="Delimiter">))</span> <span class="Delimiter">{</span> + raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"invalid tag at "</span> << ingredient_index << <span class="Constant">" for '"</span> << container_info<span class="Delimiter">.</span>name << <span class="Constant">"' in '"</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + <span class="Identifier">return</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Normal">const</span> reagent& variant = variant_type<span class="Delimiter">(</span>container<span class="Delimiter">,</span> ingredient<span class="Delimiter">.</span>value<span class="Delimiter">);</span> + trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"tag: "</span> << ingredient<span class="Delimiter">.</span>value << end<span class="Delimiter">();</span> + <span class="Comment">// replace union with its variant</span> + state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>pop<span class="Delimiter">();</span> + state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>push<span class="Delimiter">(</span>merge_check_point<span class="Delimiter">(</span>variant<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">));</span> + ++ingredient_index<span class="Delimiter">;</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(scenario merge_check_container_containing_exclusive_container)</span> +container foo [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:bar +] +exclusive-container bar [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:number +] +def main [ + <span class="Constant">1</span>:foo<span class="Special"> <- </span>merge <span class="Constant">23</span><span class="Delimiter">,</span> <span class="Constant">1</span>/y<span class="Delimiter">,</span> <span class="Constant">34</span> +] +<span class="traceContains">+mem: storing 23 in location 1</span> +<span class="traceContains">+mem: storing 1 in location 2</span> +<span class="traceContains">+mem: storing 34 in location 3</span> +$error: <span class="Constant">0</span> + +<span class="Delimiter">:(scenario merge_check_container_containing_exclusive_container_2)</span> +<span class="Special">% Hide_errors = true;</span> +container foo [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:bar +] +exclusive-container bar [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:number +] +def main [ + <span class="Constant">1</span>:foo<span class="Special"> <- </span>merge <span class="Constant">23</span><span class="Delimiter">,</span> <span class="Constant">1</span>/y<span class="Delimiter">,</span> <span class="Constant">34</span><span class="Delimiter">,</span> <span class="Constant">35</span> +] +<span class="traceContains">+error: main: too many ingredients in '1:foo <- merge 23, 1/y, 34, 35'</span> + +<span class="Delimiter">:(scenario merge_check_exclusive_container_containing_container)</span> +exclusive-container foo [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:bar +] +container bar [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:number +] +def main [ + <span class="Constant">1</span>:foo<span class="Special"> <- </span>merge <span class="Constant">1</span>/y<span class="Delimiter">,</span> <span class="Constant">23</span><span class="Delimiter">,</span> <span class="Constant">34</span> +] +<span class="traceContains">+mem: storing 1 in location 1</span> +<span class="traceContains">+mem: storing 23 in location 2</span> +<span class="traceContains">+mem: storing 34 in location 3</span> +$error: <span class="Constant">0</span> + +<span class="Delimiter">:(scenario merge_check_exclusive_container_containing_container_2)</span> +exclusive-container foo [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:bar +] +container bar [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:number +] +def main [ + <span class="Constant">1</span>:foo<span class="Special"> <- </span>merge <span class="Constant">0</span>/x<span class="Delimiter">,</span> <span class="Constant">23</span> +] +$error: <span class="Constant">0</span> + +<span class="Delimiter">:(scenario merge_check_exclusive_container_containing_container_3)</span> +<span class="Special">% Hide_errors = true;</span> +exclusive-container foo [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:bar +] +container bar [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:number +] +def main [ + <span class="Constant">1</span>:foo<span class="Special"> <- </span>merge <span class="Constant">1</span>/y<span class="Delimiter">,</span> <span class="Constant">23</span> +] +<span class="traceContains">+error: main: too few ingredients in '1:foo <- merge 1/y, 23'</span> + +<span class="Delimiter">:(scenario merge_check_exclusive_container_containing_container_4)</span> +exclusive-container foo [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:bar +] +container bar [ + <span class="Normal">a</span>:number + <span class="Normal">b</span>:number +] +def main [ + <span class="Constant">1</span>:bar<span class="Special"> <- </span>merge <span class="Constant">23</span><span class="Delimiter">,</span> <span class="Constant">24</span> + <span class="Constant">3</span>:foo<span class="Special"> <- </span>merge <span class="Constant">1</span>/y<span class="Delimiter">,</span> <span class="Constant">1</span>:bar +] +$error: <span class="Constant">0</span> + +<span class="Comment">//: Since the different variants of an exclusive-container might have</span> +<span class="Comment">//: different sizes, relax the size mismatch check for 'merge' instructions.</span> +<span class="Delimiter">:(before "End size_mismatch(x) Cases")</span> +<span class="Normal">if</span> <span class="Delimiter">(</span>current_step_index<span class="Delimiter">()</span> < SIZE<span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>steps<span class="Delimiter">())</span> + && current_instruction<span class="Delimiter">().</span>operation == MERGE + && !current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">()</span> + && current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>type<span class="Delimiter">)</span> <span class="Delimiter">{</span> + reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> x = current_instruction<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 size_mismatch Check for MERGE(x)</span> + <span class="Normal">if</span> <span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value<span class="Delimiter">).</span>kind == EXCLUSIVE_CONTAINER<span class="Delimiter">)</span> + <span class="Identifier">return</span> size_of<span class="Delimiter">(</span>x<span class="Delimiter">)</span> < SIZE<span class="Delimiter">(</span>data<span class="Delimiter">);</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(scenario merge_exclusive_container_with_mismatched_sizes)</span> +container foo [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:number +] +exclusive-container bar [ + <span class="Normal">x</span>:number + <span class="Normal">y</span>:foo +] +def main [ + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">34</span> + <span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">35</span> + <span class="Constant">3</span>:bar<span class="Special"> <- </span>merge <span class="Constant">0</span>/x<span class="Delimiter">,</span> <span class="Constant">1</span>:number + <span class="Constant">6</span>:bar<span class="Special"> <- </span>merge <span class="Constant">1</span>/foo<span class="Delimiter">,</span> <span class="Constant">1</span>:number<span class="Delimiter">,</span> <span class="Constant">2</span>:number +] +<span class="traceContains">+mem: storing 0 in location 3</span> +<span class="traceContains">+mem: storing 34 in location 4</span> +<span class="Comment"># bar is always 3 large so location 5 is skipped</span> +<span class="traceContains">+mem: storing 1 in location 6</span> +<span class="traceContains">+mem: storing 34 in location 7</span> +<span class="traceContains">+mem: storing 35 in location 8</span> +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |