<!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 - 015literal_noninteger.cc</title> <meta name="Generator" content="Vim/7.4"> <meta name="plugin-version" content="vim7.4_v1"> <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-family: monospace; color: #eeeeee; background-color: #080808; } * { font-size: 1.05em; } .traceContains { color: #008000; } .cSpecial { color: #008000; } .Comment { color: #9090ff; } .Delimiter { color: #a04060; } .Special { color: #ff6060; } .Identifier { color: #804000; } .Constant { color: #00a0a0; } --> </style> <script type='text/javascript'> <!-- --> </script> </head> <body> <pre id='vimCodeElement'> <span class="Comment">//: Support literal non-integers.</span> <span class="Delimiter">:(scenarios load)</span> <span class="Delimiter">:(scenario noninteger_literal)</span> recipe main [ <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">3.14159</span> ] <span class="traceContains">+parse: ingredient: {"3.14159": "literal-number"}</span> <span class="Delimiter">:(after "Parsing reagent(string s)")</span> if <span class="Delimiter">(</span>is_noninteger<span class="Delimiter">(</span>s<span class="Delimiter">))</span> <span class="Delimiter">{</span> name = s<span class="Delimiter">;</span> type = new type_tree<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span> properties<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair<string<span class="Delimiter">,</span> string_tree*><span class="Delimiter">(</span>name<span class="Delimiter">,</span> new string_tree<span class="Delimiter">(</span><span class="Constant">"literal-number"</span><span class="Delimiter">)));</span> set_value<span class="Delimiter">(</span>to_double<span class="Delimiter">(</span>s<span class="Delimiter">));</span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> <span class="Delimiter">:(code)</span> bool is_noninteger<span class="Delimiter">(</span>const string& s<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span class="Identifier">return</span> s<span class="Delimiter">.</span>find_first_not_of<span class="Delimiter">(</span><span class="Constant">"0123456789-."</span><span class="Delimiter">)</span> == string::npos && s<span class="Delimiter">.</span>find_first_of <span class="Delimiter">(</span><span class="Constant">"0123456789-"</span><span class="Delimiter">)</span> != string::npos && std::count<span class="Delimiter">(</span>s<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> s<span class="Delimiter">.</span>end<span class="Delimiter">(),</span> <span class="Constant">'.'</span><span class="Delimiter">)</span> == <span class="Constant">1</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> double to_double<span class="Delimiter">(</span>string n<span class="Delimiter">)</span> <span class="Delimiter">{</span> char* end = <span class="Constant">NULL</span><span class="Delimiter">;</span> <span class="Comment">// safe because string.c_str() is guaranteed to be null-terminated</span> double result = strtod<span class="Delimiter">(</span>n<span class="Delimiter">.</span>c_str<span class="Delimiter">(),</span> &end<span class="Delimiter">);</span> assert<span class="Delimiter">(</span>*end == <span class="cSpecial">'\0'</span><span class="Delimiter">);</span> <span class="Identifier">return</span> result<span class="Delimiter">;</span> <span class="Delimiter">}</span> void test_is_noninteger<span class="Delimiter">()</span> <span class="Delimiter">{</span> CHECK<span class="Delimiter">(</span>!is_noninteger<span class="Delimiter">(</span><span class="Constant">"1234"</span><span class="Delimiter">));</span> CHECK<span class="Delimiter">(</span>!is_noninteger<span class="Delimiter">(</span><span class="Constant">"1a2"</span><span class="Delimiter">));</span> CHECK<span class="Delimiter">(</span>is_noninteger<span class="Delimiter">(</span><span class="Constant">"234.0"</span><span class="Delimiter">));</span> CHECK<span class="Delimiter">(</span>!is_noninteger<span class="Delimiter">(</span><span class="Constant">"..."</span><span class="Delimiter">));</span> CHECK<span class="Delimiter">(</span>!is_noninteger<span class="Delimiter">(</span><span class="Constant">"."</span><span class="Delimiter">));</span> CHECK<span class="Delimiter">(</span>is_noninteger<span class="Delimiter">(</span><span class="Constant">"2."</span><span class="Delimiter">));</span> CHECK<span class="Delimiter">(</span>is_noninteger<span class="Delimiter">(</span><span class="Constant">".2"</span><span class="Delimiter">));</span> <span class="Delimiter">}</span> </pre> </body> </html> <!-- vim: set foldmethod=manual : -->