/** @file ginsh_lexer.ll
*
* Lexical analyzer definition for ginsh.
- * This file must be processed with flex.
- *
+ * This file must be processed with flex. */
+
+/*
* GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
*
* This program is free software; you can redistribute it and/or modify
%%
[ \t\n]+ /* skip whitespace */
\\$ /* skip line continuations */
-"#".* /* skip comments starting with "#" */
+"//".* /* skip comments starting with "//" */
^"!".* system(yytext + 1); /* execute shell command */
/* special values */
Pi yylval = Pi; return T_LITERAL;
-EulerGamma yylval = EulerGamma; return T_LITERAL;
+Euler yylval = Euler; return T_LITERAL;
Catalan yylval = Catalan; return T_LITERAL;
FAIL yylval = *new fail(); return T_LITERAL;
I yylval = I; return T_NUMBER;
/* keywords */
quit|exit return T_QUIT;
+warranty return T_WARRANTY;
print return T_PRINT;
+iprint return T_IPRINT;
time return T_TIME;
xyzzy return T_XYZZY;
inventory return T_INVENTORY;
/* numbers */
{D}+ |
+"#"{D}+"R"{AN}+ |
+"#b"([01])+ |
+"#o"[0-7]+ |
+"#x"[0-9a-fA-F]+ |
{D}+"."{D}*({E})? |
{D}*"."{D}+({E})? |
{D}+{E} yylval = numeric(yytext); return T_NUMBER;
/* symbols */
{A}{AN}* {
- if (syms.find(yytext) == syms.end())
- syms[yytext] = *(new symbol(yytext));
- yylval = syms[yytext];
+ sym_tab::const_iterator i = syms.find(yytext);
+ if (i == syms.end()) {
+ yylval = syms[yytext] = *(new symbol(yytext));
+ } else
+ yylval = i->second;
return T_SYMBOL;
}