Flex/Bison based compiler and interpreter written in C++ (using Boost)
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/*
* Copyright (C) 2008 Kamil Dudka <xdudka00@stud.fit.vutbr.cz>
*
* This file is part of vyp08 (compiler and interpreter of VYP08 language).
*
* vyp08 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* vyp08 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with vyp08. If not, see <http://www.gnu.org/licenses/>.
*/
/* use C++ instead of C */
%option c++
/* count line numbers automatically */
%option yylineno
/* do not use yywrap function/method */
%option noyywrap
%{
#include "scanner.h"
%}
space [ \t\n\r\v\f]+
id [A-Za-z][A-Za-z0-9_]*
int [0-9]+
double [0-9]+\.([0-9]+(e[+-]?[0-9]+)?)?
esc_quot (\\\\)*\\\"
string \"{esc_quot}?([^\\]{esc_quot}|[^\"])*\"
%%
{space} /* skip blanks and tabs */
{id} return ETOKEN_ID;
{int} return ETOKEN_NUMBER_INT;
{double} return ETOKEN_NUMBER_DOUBLE;
{string} return ETOKEN_STRING;
"{" return ETOKEN_OP_LCBR;
"}" return ETOKEN_OP_RCBR;
"(" return ETOKEN_OP_LPAR;
")" return ETOKEN_OP_RPAR;
"*" return ETOKEN_OP_STAR;
"/" return ETOKEN_OP_SLASH;
"+" return ETOKEN_OP_PLUS;
"-" return ETOKEN_OP_MINUS;
"<" return ETOKEN_OP_LESS;
"<=" return ETOKEN_OP_LESS_EQ;
">" return ETOKEN_OP_GREATER;
">=" return ETOKEN_OP_GREATER_EQ;
":=" return ETOKEN_OP_ASSIGN;
"," return ETOKEN_OP_COMMA;
";" return ETOKEN_OP_SEMICOLON;
"/*" {
int c;
while((c = yyinput()) != 0) {
if(c == '*') {
if((c = yyinput()) == '/')
break;
else
unput(c);
}
}
}
"//" {
int c;
while ((c = yyinput()) != 0) {
if (c == '\n' || c == EOF)
break;
}
}
%%
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