<!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 - 011load.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; } .traceAbsent { color: #c00000; } .cSpecial { color: #008000; } .traceContains { color: #008000; } .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">//: Phase 1 of running mu code: load it from a textual representation.</span> <span class="Delimiter">:(scenarios load)</span> <span class="Comment">// use 'load' instead of 'run' in all scenarios in this layer</span> <span class="Delimiter">:(scenario first_recipe)</span> def main [ <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span> ] <span class="traceContains">+parse: instruction: copy</span> <span class="traceContains">+parse: ingredient: {23: "literal"}</span> <span class="traceContains">+parse: product: {1: "number"}</span> <span class="Delimiter">:(code)</span> vector<recipe_ordinal> load<span class="Delimiter">(</span>string form<span class="Delimiter">)</span> <span class="Delimiter">{</span> istringstream in<span class="Delimiter">(</span>form<span class="Delimiter">);</span> in >> std::noskipws<span class="Delimiter">;</span> <span class="Identifier">return</span> load<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Delimiter">}</span> vector<recipe_ordinal> load<span class="Delimiter">(</span>istream& in<span class="Delimiter">)</span> <span class="Delimiter">{</span> in >> std::noskipws<span class="Delimiter">;</span> vector<recipe_ordinal> result<span class="Delimiter">;</span> <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span> skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span> string command = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Comment">// Command Handlers</span> <span class="Normal">if</span> <span class="Delimiter">(</span>command == <span class="Constant">"recipe"</span> || command == <span class="Constant">"def"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>slurp_recipe<span class="Delimiter">(</span>in<span class="Delimiter">));</span> <span class="Delimiter">}</span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>command == <span class="Constant">"recipe!"</span> || command == <span class="Constant">"def!"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> Disable_redefine_checks = <span class="Constant">true</span><span class="Delimiter">;</span> result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>slurp_recipe<span class="Delimiter">(</span>in<span class="Delimiter">));</span> Disable_redefine_checks = <span class="Constant">false</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> <span class="Comment">// End Command Handlers</span> <span class="Normal">else</span> <span class="Delimiter">{</span> raise << <span class="Constant">"unknown top-level command: "</span> << command << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span> <span class="Delimiter">}</span> <span class="Delimiter">}</span> <span class="Identifier">return</span> result<span class="Delimiter">;</span> <span class="Delimiter">}</span> <span class="Normal">int</span> slurp_recipe<span class="Delimiter">(</span>istream& in<span class="Delimiter">)</span> <span class="Delimiter">{</span> recipe result<span class="Delimiter">;</span> result<span class="Delimiter">.</span>name = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Comment">// End Load Recipe Name</span> skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Comment">// End Recipe Refinements</span> <span class="Normal">if</span> <span class="Delimiter">(</span>result<span class="Delimiter">.</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> raise << <span class="Constant">"empty result.name</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"--- defining "</span> << result<span class="Delimiter">.</span>name << end<span class="Delimiter">();</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">))</span> put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">,</span> Next_recipe_ordinal++<span class="Delimiter">);</span> <span class="Normal">if</span> <span class="Delimiter">(</span>Recipe<span class="Delimiter">.</span>find<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">))</span> != Recipe<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span> trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"already exists"</span> << end<span class="Delimiter">();</span> <span class="Normal">if</span> <span class="Delimiter">(</span>should_check_for_redefine<span class="Delimiter">(</span>result<span class="Delimiter">.</span>name<span class="Delimiter">))</span> raise << <span class="Constant">"redefining recipe "</span> << result<span class="Delimiter">.</span>name << <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> Recipe<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">));</span> <span class="Delimiter">}</span> slurp_body<span class="Delimiter">(</span>in<span class="Delimiter">,</span> result<span class="Delimiter">);</span> <span class="Comment">// End Recipe Body(result)</span> put<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">),</span> result<span class="Delimiter">);</span> <span class="Identifier">return</span> get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">);</span> <span class="Delimiter">}</span> <span class="Normal">void</span> slurp_body<span class="Delimiter">(</span>istream& in<span class="Delimiter">,</span> recipe& result<span class="Delimiter">)</span> <span class="Delimiter">{</span> in >> std::noskipws<span class="Delimiter">;</span> skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>get<span class="Delimiter">()</span> != <span class="Constant">'['</span><span class="Delimiter">)</span> raise << result<span class="Delimiter">.</span>name << <span class="Constant">": recipe body must begin with '['</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Comment">// permit trailing comment after '['</span> instruction curr<span class="Delimiter">;</span> <span class="Normal">while</span> <span class="Delimiter">(</span>next_instruction<span class="Delimiter">(</span>in<span class="Delimiter">,</span> &curr<span class="Delimiter">))</span> <span class="Delimiter">{</span> <span class="Comment">// End Rewrite Instruction(curr, recipe result)</span> trace<span class="Delimiter">(</span><span class="Constant">9992</span><span class="Delimiter">,</span> <span class="Constant">"load"</span><span class="Delimiter">)</span> << <span class="Constant">"after rewriting: "</span> << to_string<span class="Delimiter">(</span>curr<span class="Delimiter">)</span> << end<span class="Delimiter">();</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!curr<span class="Delimiter">.</span>is_empty<span class="Delimiter">())</span> <span class="Delimiter">{</span> curr<span class="Delimiter">.</span>original_string = to_string<span class="Delimiter">(</span>curr<span class="Delimiter">);</span> result<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>curr<span class="Delimiter">);</span> <span class="Delimiter">}</span> <span class="Delimiter">}</span> <span class="Delimiter">}</span> <span class="Normal">bool</span> next_instruction<span class="Delimiter">(</span>istream& in<span class="Delimiter">,</span> instruction* curr<span class="Delimiter">)</span> <span class="Delimiter">{</span> curr<span class="Delimiter">-></span>clear<span class="Delimiter">();</span> skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span> raise << <span class="Constant">"0: unbalanced '[' for recipe</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> vector<string> words<span class="Delimiter">;</span> <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">)</span> && in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span> raise << <span class="Constant">"1: unbalanced '[' for recipe</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> string word = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span> words<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>word<span class="Delimiter">);</span> skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Delimiter">}</span> skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>words<span class="Delimiter">)</span> == <span class="Constant">1</span> && words<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> == <span class="Constant">"]"</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span> <span class="Comment">// end of recipe</span> <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>words<span class="Delimiter">)</span> == <span class="Constant">1</span> && !isalnum<span class="Delimiter">(</span>words<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">))</span> && words<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> != <span class="Constant">'$'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> curr<span class="Delimiter">-></span>is_label = <span class="Constant">true</span><span class="Delimiter">;</span> curr<span class="Delimiter">-></span>label = words<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span> trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"label: "</span> << curr<span class="Delimiter">-></span>label << end<span class="Delimiter">();</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span> raise << <span class="Constant">"7: unbalanced '[' for recipe</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> vector<string>::iterator p = words<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> <span class="Normal">if</span> <span class="Delimiter">(</span>find<span class="Delimiter">(</span>words<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> words<span class="Delimiter">.</span>end<span class="Delimiter">(),</span> <span class="Constant">"<-"</span><span class="Delimiter">)</span> != words<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span> <span class="Normal">for</span> <span class="Delimiter">(;</span> *p != <span class="Constant">"<-"</span><span class="Delimiter">;</span> ++p<span class="Delimiter">)</span> curr<span class="Delimiter">-></span>products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span>*p<span class="Delimiter">));</span> ++p<span class="Delimiter">;</span> <span class="Comment">// skip <-</span> <span class="Delimiter">}</span> <span class="Normal">if</span> <span class="Delimiter">(</span>p == words<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span> raise << <span class="Constant">"instruction prematurely ended with '<-'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> curr<span class="Delimiter">-></span>old_name = curr<span class="Delimiter">-></span>name = *p<span class="Delimiter">;</span> p++<span class="Delimiter">;</span> <span class="Comment">// curr->operation will be set in a later layer</span> <span class="Normal">for</span> <span class="Delimiter">(;</span> p != words<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> curr<span class="Delimiter">-></span>ingredients<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span>*p<span class="Delimiter">));</span> trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"instruction: "</span> << curr<span class="Delimiter">-></span>name << end<span class="Delimiter">();</span> trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">" number of ingredients: "</span> << SIZE<span class="Delimiter">(</span>curr<span class="Delimiter">-></span>ingredients<span class="Delimiter">)</span> << end<span class="Delimiter">();</span> <span class="Normal">for</span> <span class="Delimiter">(</span>vector<reagent>::iterator p = curr<span class="Delimiter">-></span>ingredients<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != curr<span class="Delimiter">-></span>ingredients<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">" ingredient: "</span> << to_string<span class="Delimiter">(</span>*p<span class="Delimiter">)</span> << end<span class="Delimiter">();</span> <span class="Normal">for</span> <span class="Delimiter">(</span>vector<reagent>::iterator p = curr<span class="Delimiter">-></span>products<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != curr<span class="Delimiter">-></span>products<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">" product: "</span> << to_string<span class="Delimiter">(</span>*p<span class="Delimiter">)</span> << end<span class="Delimiter">();</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span> raise << <span class="Constant">"9: unbalanced '[' for recipe</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> string next_word<span class="Delimiter">(</span>istream& in<span class="Delimiter">)</span> <span class="Delimiter">{</span> skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Comment">// End next_word Special-cases</span> ostringstream out<span class="Delimiter">;</span> slurp_word<span class="Delimiter">(</span>in<span class="Delimiter">,</span> out<span class="Delimiter">);</span> skip_whitespace_and_comments_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span> <span class="Delimiter">}</span> <span class="Delimiter">:(before "End Globals")</span> <span class="Comment">// word boundaries</span> <span class="Normal">const</span> string Terminators<span class="Delimiter">(</span><span class="Constant">"(){}"</span><span class="Delimiter">);</span> <span class="Delimiter">:(code)</span> <span class="Normal">void</span> slurp_word<span class="Delimiter">(</span>istream& in<span class="Delimiter">,</span> ostream& out<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span class="Normal">char</span> c<span class="Delimiter">;</span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">)</span> && Terminators<span class="Delimiter">.</span>find<span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">())</span> != string::npos<span class="Delimiter">)</span> <span class="Delimiter">{</span> in >> c<span class="Delimiter">;</span> out << c<span class="Delimiter">;</span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> <span class="Normal">while</span> <span class="Delimiter">(</span>in >> c<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span class="Normal">if</span> <span class="Delimiter">(</span>isspace<span class="Delimiter">(</span>c<span class="Delimiter">)</span> || Terminators<span class="Delimiter">.</span>find<span class="Delimiter">(</span>c<span class="Delimiter">)</span> != string::npos || Ignore<span class="Delimiter">.</span>find<span class="Delimiter">(</span>c<span class="Delimiter">)</span> != string::npos<span class="Delimiter">)</span> <span class="Delimiter">{</span> in<span class="Delimiter">.</span>putback<span class="Delimiter">(</span>c<span class="Delimiter">);</span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> out << c<span class="Delimiter">;</span> <span class="Delimiter">}</span> <span class="Delimiter">}</span> <span class="Normal">void</span> skip_whitespace_and_comments<span class="Delimiter">(</span>istream& in<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Normal">if</span> <span class="Delimiter">(</span>isspace<span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()))</span> in<span class="Delimiter">.</span>get<span class="Delimiter">();</span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>Ignore<span class="Delimiter">.</span>find<span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">())</span> != string::npos<span class="Delimiter">)</span> in<span class="Delimiter">.</span>get<span class="Delimiter">();</span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> == <span class="Constant">'#'</span><span class="Delimiter">)</span> skip_comment<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Normal">else</span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> <span class="Delimiter">}</span> <span class="Comment">// confusing; move to the next line only to skip a comment, but never otherwise</span> <span class="Normal">void</span> skip_whitespace_and_comments_but_not_newline<span class="Delimiter">(</span>istream& in<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> == <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Normal">if</span> <span class="Delimiter">(</span>isspace<span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()))</span> in<span class="Delimiter">.</span>get<span class="Delimiter">();</span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>Ignore<span class="Delimiter">.</span>find<span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">())</span> != string::npos<span class="Delimiter">)</span> in<span class="Delimiter">.</span>get<span class="Delimiter">();</span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> == <span class="Constant">'#'</span><span class="Delimiter">)</span> skip_comment<span class="Delimiter">(</span>in<span class="Delimiter">);</span> <span class="Normal">else</span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> <span class="Delimiter">}</span> <span class="Normal">void</span> skip_comment<span class="Delimiter">(</span>istream& in<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">)</span> && in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> == <span class="Constant">'#'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> in<span class="Delimiter">.</span>get<span class="Delimiter">();</span> <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">)</span> && in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> in<span class="Delimiter">.</span>get<span class="Delimiter">();</span> <span class="Delimiter">}</span> <span class="Delimiter">}</span> <span class="Comment">//: Warn if a recipe gets redefined, because large codebases can accidentally</span> <span class="Comment">//: step on their own toes. But there'll be many occasions later where</span> <span class="Comment">//: we'll want to disable the errors.</span> <span class="Delimiter">:(before "End Globals")</span> <span class="Normal">bool</span> Disable_redefine_checks = <span class="Constant">false</span><span class="Delimiter">;</span> <span class="Delimiter">:(before "End Setup")</span> Disable_redefine_checks = <span class="Constant">false</span><span class="Delimiter">;</span> <span class="Delimiter">:(code)</span> <span class="Normal">bool</span> should_check_for_redefine<span class="Delimiter">(</span><span class="Normal">const</span> string& recipe_name<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span class="Normal">if</span> <span class="Delimiter">(</span>Disable_redefine_checks<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> <span class="Comment">// for debugging</span> <span class="Delimiter">:(code)</span> <span class="Normal">void</span> show_rest_of_stream<span class="Delimiter">(</span>istream& in<span class="Delimiter">)</span> <span class="Delimiter">{</span> cerr << <span class="Constant">'^'</span><span class="Delimiter">;</span> <span class="Normal">char</span> c<span class="Delimiter">;</span> <span class="Normal">while</span> <span class="Delimiter">(</span>in >> c<span class="Delimiter">)</span> cerr << c<span class="Delimiter">;</span> cerr << <span class="Constant">"$</span><span class="cSpecial">\n</span><span class="Constant">"</span><span class="Delimiter">;</span> exit<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span> <span class="Delimiter">}</span> <span class="Delimiter">:(scenario parse_comment_outside_recipe)</span> <span class="Comment"># this comment will be dropped by the tangler, so we need a dummy recipe to stop that</span> def f1 [ ] <span class="Comment"># this comment will go through to 'load'</span> def main [ <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span> ] <span class="traceContains">+parse: instruction: copy</span> <span class="traceContains">+parse: ingredient: {23: "literal"}</span> <span class="traceContains">+parse: product: {1: "number"}</span> <span class="Delimiter">:(scenario parse_comment_amongst_instruction)</span> def main [ <span class="Comment"># comment</span> <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span> ] <span class="traceContains">+parse: instruction: copy</span> <span class="traceContains">+parse: ingredient: {23: "literal"}</span> <span class="traceContains">+parse: product: {1: "number"}</span> <span class="Delimiter">:(scenario parse_comment_amongst_instruction_2)</span> def main [ <span class="Comment"># comment</span> <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span> <span class="Comment"># comment</span> ] <span class="traceContains">+parse: instruction: copy</span> <span class="traceContains">+parse: ingredient: {23: "literal"}</span> <span class="traceContains">+parse: product: {1: "number"}</span> <span class="Delimiter">:(scenario parse_comment_amongst_instruction_3)</span> def main [ <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span> <span class="Comment"># comment</span> <span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span> ] <span class="traceContains">+parse: instruction: copy</span> <span class="traceContains">+parse: ingredient: {23: "literal"}</span> <span class="traceContains">+parse: product: {1: "number"}</span> <span class="traceContains">+parse: instruction: copy</span> <span class="traceContains">+parse: ingredient: {23: "literal"}</span> <span class="traceContains">+parse: product: {2: "number"}</span> <span class="Delimiter">:(scenario parse_comment_after_instruction)</span> def main [ <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span> <span class="Comment"># comment</span> ] <span class="traceContains">+parse: instruction: copy</span> <span class="traceContains">+parse: ingredient: {23: "literal"}</span> <span class="traceContains">+parse: product: {1: "number"}</span> <span class="Delimiter">:(scenario parse_label)</span> def main [ +foo ] <span class="traceContains">+parse: label: +foo</span> <span class="Delimiter">:(scenario parse_dollar_as_recipe_name)</span> def main [ $foo ] <span class="traceContains">+parse: instruction: $foo</span> <span class="Delimiter">:(scenario parse_multiple_properties)</span> def main [ <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span>/foo:bar:baz ] <span class="traceContains">+parse: instruction: copy</span> <span class="traceContains">+parse: ingredient: {23: "literal", "foo": ("bar" "baz")}</span> <span class="traceContains">+parse: product: {1: "number"}</span> <span class="Delimiter">:(scenario parse_multiple_products)</span> def main [ <span class="Constant">1</span>:number<span class="Delimiter">,</span> <span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span> ] <span class="traceContains">+parse: instruction: copy</span> <span class="traceContains">+parse: ingredient: {23: "literal"}</span> <span class="traceContains">+parse: product: {1: "number"}</span> <span class="traceContains">+parse: product: {2: "number"}</span> <span class="Delimiter">:(scenario parse_multiple_ingredients)</span> def main [ <span class="Constant">1</span>:number<span class="Delimiter">,</span> <span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span><span class="Delimiter">,</span> <span class="Constant">4</span>:number ] <span class="traceContains">+parse: instruction: copy</span> <span class="traceContains">+parse: ingredient: {23: "literal"}</span> <span class="traceContains">+parse: ingredient: {4: "number"}</span> <span class="traceContains">+parse: product: {1: "number"}</span> <span class="traceContains">+parse: product: {2: "number"}</span> <span class="Delimiter">:(scenario parse_multiple_types)</span> def main [ <span class="Constant">1</span>:number<span class="Delimiter">,</span> <span class="Constant">2</span>:address:number<span class="Special"> <- </span>copy <span class="Constant">23</span><span class="Delimiter">,</span> <span class="Constant">4</span>:number ] <span class="traceContains">+parse: instruction: copy</span> <span class="traceContains">+parse: ingredient: {23: "literal"}</span> <span class="traceContains">+parse: ingredient: {4: "number"}</span> <span class="traceContains">+parse: product: {1: "number"}</span> <span class="traceContains">+parse: product: {2: ("address" "number")}</span> <span class="Delimiter">:(scenario parse_properties)</span> def main [ <span class="Constant">1</span>:address:number/lookup<span class="Special"> <- </span>copy <span class="Constant">23</span> ] <span class="traceContains">+parse: product: {1: ("address" "number"), "lookup": ()}</span> <span class="Comment">//: this test we can't represent with a scenario</span> <span class="Delimiter">:(code)</span> <span class="Normal">void</span> test_parse_comment_terminated_by_eof<span class="Delimiter">()</span> <span class="Delimiter">{</span> load<span class="Delimiter">(</span><span class="Constant">"recipe main [</span><span class="cSpecial">\n</span><span class="Constant">"</span> <span class="Constant">" a:number <- copy 34</span><span class="cSpecial">\n</span><span class="Constant">"</span> <span class="Constant">"]</span><span class="cSpecial">\n</span><span class="Constant">"</span> <span class="Constant">"# abc"</span><span class="Delimiter">);</span> <span class="Comment">// no newline after comment</span> cerr << <span class="Constant">"."</span><span class="Delimiter">;</span> <span class="Comment">// termination = success</span> <span class="Delimiter">}</span> <span class="Delimiter">:(scenario forbid_redefining_recipes)</span> <span class="Special">% Hide_errors = true;</span> def main [ <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span> ] def main [ <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">24</span> ] <span class="traceContains">+error: redefining recipe main</span> <span class="Delimiter">:(scenario permit_forcibly_redefining_recipes)</span> def main [ <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span> ] def! main [ <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">24</span> ] <span class="traceAbsent">-error: redefining recipe main</span> $error: <span class="Constant">0</span> </pre> </body> </html> <!-- vim: set foldmethod=manual : -->