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<a href="parser_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*****************************************************************************/</span><span class="comment"></span>
<a name="l00002"></a>00002 <span class="comment">/*!</span>
<a name="l00003"></a>00003 <span class="comment"> * \file parser.h</span>
<a name="l00004"></a>00004 <span class="comment"> * </span>
<a name="l00005"></a>00005 <span class="comment"> * Author: Sergey Berezin</span>
<a name="l00006"></a>00006 <span class="comment"> * </span>
<a name="l00007"></a>00007 <span class="comment"> * Created: Wed Feb 5 11:46:57 2003</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * <hr></span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> * License to use, copy, modify, sell and/or distribute this software</span>
<a name="l00012"></a>00012 <span class="comment"> * and its documentation for any purpose is hereby granted without</span>
<a name="l00013"></a>00013 <span class="comment"> * royalty, subject to the terms and conditions defined in the \ref</span>
<a name="l00014"></a>00014 <span class="comment"> * LICENSE file provided with this distribution.</span>
<a name="l00015"></a>00015 <span class="comment"> * </span>
<a name="l00016"></a>00016 <span class="comment"> * <hr></span>
<a name="l00017"></a>00017 <span class="comment"> * </span>
<a name="l00018"></a>00018 <span class="comment"> * The top-level API to the parser. At this level, it is simply a</span>
<a name="l00019"></a>00019 <span class="comment"> * stream of commands (Expr's) terminated by an infinite sequence of</span>
<a name="l00020"></a>00020 <span class="comment"> * Null Expr. It has a support to parse several different input</span>
<a name="l00021"></a>00021 <span class="comment"> * languages (as many as we care to implement), and may take a file</span>
<a name="l00022"></a>00022 <span class="comment"> * name, or an istream to read from (default: std::cin, or stdin).</span>
<a name="l00023"></a>00023 <span class="comment"> * Using iostream means no more worries about whether to close files</span>
<a name="l00024"></a>00024 <span class="comment"> * or not.</span>
<a name="l00025"></a>00025 <span class="comment"> */</span>
<a name="l00026"></a>00026 <span class="comment">/*****************************************************************************/</span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="preprocessor">#ifndef _cvc3__parser_h_</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define _cvc3__parser_h_</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include "<a class="code" href="exception_8h.html">exception.h</a>"</span>
<a name="l00032"></a>00032 <span class="preprocessor">#include "<a class="code" href="lang_8h.html" title="Definition of input and output languages to CVC3.">lang.h</a>"</span>
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="keyword">namespace </span>CVC3 {
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="keyword">class </span>ValidityChecker;
<a name="l00037"></a>00037 <span class="keyword">class </span>Translator;
<a name="l00038"></a>00038 <span class="keyword">class </span>Expr;
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">// Internal parser state and other data</span>
<a name="l00041"></a>00041 <span class="keyword">class </span>ParserData;
<a name="l00042"></a>00042
<a name="l00043"></a><a class="code" href="classCVC3_1_1Parser.html">00043</a> <span class="keyword">class </span><a class="code" href="classCVC3_1_1Parser.html">Parser</a> {
<a name="l00044"></a>00044 <span class="keyword">private</span>:
<a name="l00045"></a><a class="code" href="classCVC3_1_1Parser.html#ac27e79d59081d2b4baef825f0c61cdc6">00045</a> ParserData* <a class="code" href="classCVC3_1_1Parser.html#ac27e79d59081d2b4baef825f0c61cdc6">d_data</a>;
<a name="l00046"></a>00046 <span class="comment">// Internal methods for constructing and destroying the actual parser</span>
<a name="l00047"></a>00047 <span class="keywordtype">void</span> <a class="code" href="classCVC3_1_1Parser.html#ae356db81a01f6c01cea6109286046e6e">initParser</a>();
<a name="l00048"></a>00048 <span class="keywordtype">void</span> <a class="code" href="classCVC3_1_1Parser.html#adfcf293f037cc03e33e18727dba47d29">deleteParser</a>();
<a name="l00049"></a>00049 <span class="keyword">public</span>:
<a name="l00050"></a>00050 <span class="comment">// Constructors</span>
<a name="l00051"></a>00051 <a class="code" href="classCVC3_1_1Parser.html#a5169c93f94365de55769aa2b4e59ff05">Parser</a>(<a class="code" href="classCVC3_1_1ValidityChecker.html" title="Generic API for a validity checker.">ValidityChecker</a>* <a class="code" href="main_8cpp.html#a88136d6dfceb0dedcb0b781a65423d54">vc</a>, <a class="code" href="classCVC3_1_1Translator.html">Translator</a>* translator, <a class="code" href="namespaceCVC3.html#a3aaaf7bc1fc47a4860ef6e59ddb0db0e" title="Different input languages.">InputLanguage</a> lang,
<a name="l00052"></a>00052 <span class="comment">// The 'interactive' flag is ignored when fileName != ""</span>
<a name="l00053"></a>00053 <span class="keywordtype">bool</span> interactive = <span class="keyword">true</span>,
<a name="l00054"></a>00054 <span class="keyword">const</span> std::string& fileName = <span class="stringliteral">""</span>);
<a name="l00055"></a>00055 <a class="code" href="classCVC3_1_1Parser.html#a5169c93f94365de55769aa2b4e59ff05">Parser</a>(<a class="code" href="classCVC3_1_1ValidityChecker.html" title="Generic API for a validity checker.">ValidityChecker</a>* <a class="code" href="main_8cpp.html#a88136d6dfceb0dedcb0b781a65423d54">vc</a>, <a class="code" href="classCVC3_1_1Translator.html">Translator</a>* translator, <a class="code" href="namespaceCVC3.html#a3aaaf7bc1fc47a4860ef6e59ddb0db0e" title="Different input languages.">InputLanguage</a> lang, std::istream& is,
<a name="l00056"></a>00056 <span class="keywordtype">bool</span> interactive = <span class="keyword">false</span>);
<a name="l00057"></a>00057 <span class="comment">// Destructor</span>
<a name="l00058"></a>00058 <a class="code" href="classCVC3_1_1Parser.html#a7b686af83052939c1339342245e312a5">~Parser</a>();
<a name="l00059"></a>00059 <span class="comment">// Read the next command. </span>
<a name="l00060"></a>00060 <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> <a class="code" href="classCVC3_1_1Parser.html#a85eb8f5faba18ee392023d93ac6cc401">next</a>();
<a name="l00061"></a>00061 <span class="comment">// Check if we are done (end of input has been reached)</span>
<a name="l00062"></a>00062 <span class="keywordtype">bool</span> <a class="code" href="classCVC3_1_1Parser.html#a088627f9421c691414cd06161f99394a">done</a>() <span class="keyword">const</span>;
<a name="l00063"></a>00063 <span class="comment">// The same check can be done by using the class Parser's value as</span>
<a name="l00064"></a>00064 <span class="comment">// a Boolean</span>
<a name="l00065"></a><a class="code" href="classCVC3_1_1Parser.html#a787fa842873ad397eb21d6e46c360570">00065</a> <a class="code" href="classCVC3_1_1Parser.html#a787fa842873ad397eb21d6e46c360570">operator bool</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="classCVC3_1_1Parser.html#a088627f9421c691414cd06161f99394a">done</a>(); }
<a name="l00066"></a>00066 <span class="keywordtype">void</span> <a class="code" href="classCVC3_1_1Parser.html#a96620f0d491db182bbaefa186d05621b">printLocation</a>(std::ostream & out) <span class="keyword">const</span>;
<a name="l00067"></a>00067 <span class="comment">// Reset any local data that depends on validity checker</span>
<a name="l00068"></a>00068 <span class="keywordtype">void</span> <a class="code" href="classCVC3_1_1Parser.html#a84d22e302246021152e5dbc950e67758">reset</a>();
<a name="l00069"></a>00069 }; <span class="comment">// end of class Parser</span>
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="comment">// The global pointer to ParserTemp. Each instance of class Parser</span>
<a name="l00072"></a>00072 <span class="comment">// sets this pointer before any calls to the lexer. We do it this</span>
<a name="l00073"></a>00073 <span class="comment">// way because flex and bison use global vars, and we want each</span>
<a name="l00074"></a>00074 <span class="comment">// Parser object to appear independent.</span>
<a name="l00075"></a>00075 <span class="keyword">class </span>ParserTemp;
<a name="l00076"></a>00076 <span class="keyword">extern</span> ParserTemp* <a class="code" href="namespaceCVC3.html#aa23eb184feae0b7ca169d9f67d531043">parserTemp</a>;
<a name="l00077"></a>00077
<a name="l00078"></a>00078 } <span class="comment">// end of namespace CVC3</span>
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="preprocessor">#endif</span>
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