Update .gitignore.

[cdecl99.git] / src / scan.l

diff --git a/src/scan.l b/src/scan.l
index 5c1a960651d591f4cfd75bcc10658a55b260df95..54cea88717622f138a74f11841b73e9170f9f328 100644 (file)
--- a/src/scan.l
+++ b/src/scan.l
@@ -17,10 +17,112 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
- #include "parse.h"
+#include <config.h>
+#include "parse.h"
 }
 
-%option noyywrap bison-locations
+%option nodefault noyywrap bison-locations reentrant never-interactive
+%option extra-type="_Bool"
+%option prefix="cdecl__yy"
+
+%{
+#define lex_error(msg) do { \
+       cdecl__yyerror(yylloc, NULL, NULL, (msg)); \
+       return T_LEX_ERROR; \
+} while(0)
+
+#define dup_token() do { \
+       yylval->strval = malloc(yyleng+1); \
+       if (!yylval->strval) \
+               lex_error("failed to allocate memory"); \
+       strcpy(yylval->strval, yytext); \
+} while(0)
+%}
+
+%s ENGLISH
+
+IDENT [_[:alpha:]][_[:alnum:]]*
+INTEGER 0x[[:xdigit:]]+|0[0-7]+|[[:digit:]]+
 
 %%
 
+%{
+       if (yyextra) {
+               yyextra = 0;
+               BEGIN(ENGLISH);
+               return T_ENGLISH;
+       }
+%}
+
+"..." return T_ELLIPSIS;
+";"   return T_SEMICOLON;
+"*"   return T_ASTERISK;
+"("   return T_LPAREN;
+")"   return T_RPAREN;
+"["   return T_LBRACKET;
+"]"   return T_RBRACKET;
+","   return T_COMMA;
+
+"typedef"    return T_TYPEDEF;
+"extern"     return T_EXTERN;
+"static"     return T_STATIC;
+"auto"       return T_AUTO;
+"register"   return T_REGISTER;
+
+"restrict"   return T_RESTRICT;
+"volatile"   return T_VOLATILE;
+"const"      return T_CONST;
+
+"inline"     return T_INLINE;
+
+"void"       return T_VOID;
+"char"       return T_CHAR;
+"short"      return T_SHORT;
+"int"        return T_INT;
+"long"       return T_LONG;
+"float"      return T_FLOAT;
+"double"     return T_DOUBLE;
+"signed"     return T_SIGNED;
+"unsigned"   return T_UNSIGNED;
+"_Bool"      return T_BOOL;
+"_Complex"   return T_COMPLEX;
+"_Imaginary" return T_IMAGINARY;
+
+"struct"     return T_STRUCT;
+"union"      return T_UNION;
+"enum"       return T_ENUM;
+
+{INTEGER} {
+       char *end;
+
+       errno = 0;
+       yylval->uintval = strtoumax(yytext, &end, 0);
+       if (errno == ERANGE)
+               lex_error("integer constant out of range");
+       if (*end)
+               lex_error("invalid integer constant");
+
+       return T_UINT;
+}
+
+<ENGLISH>{
+       "variable-length" return T_VLA;
+       "type"            return T_TYPE;
+       "declare"         return T_DECLARE;
+       "pointer"         return T_POINTER;
+       "function"        return T_FUNCTION;
+       "returning"       return T_RETURNING;
+       "array"           return T_ARRAY;
+       "to"              return T_TO;
+       "of"              return T_OF;
+       "as"              return T_AS;
+}
+
+{IDENT} { dup_token(); return T_IDENT; }
+
+[[:space:]]+
+. {
+       char buf[] = "syntax error, unexpected #";
+       *strchr(buf, '#') = *yytext;
+       lex_error(buf);
+}