annotate src/sdl/expr.y @ 34:6bde5b67a2b8

saving progress
author Robert McIntyre <rlm@mit.edu>
date Mon, 05 Mar 2012 01:58:52 -0600
parents f9f4f1b99eed
children
rev   line source
rlm@1 1 %{
rlm@1 2 namespace std {
rlm@1 3 #include <stdio.h>
rlm@1 4 #include <memory.h>
rlm@1 5 #include <stdlib.h>
rlm@1 6 #include <string.h>
rlm@1 7 }
rlm@1 8
rlm@1 9 using namespace std;
rlm@1 10
rlm@1 11 #include "System.h"
rlm@1 12 #include "elf.h"
rlm@1 13 #include "exprNode.h"
rlm@1 14
rlm@1 15 extern int yyerror(char *);
rlm@1 16 extern int yylex();
rlm@1 17 extern char *yytext;
rlm@1 18
rlm@1 19
rlm@1 20 //#define YYERROR_VERBOSE 1
rlm@1 21 //#define YYDEBUG 1
rlm@1 22
rlm@1 23 Node *result = NULL;
rlm@1 24 %}
rlm@1 25
rlm@1 26 %token TOKEN_IDENTIFIER TOKEN_DOT TOKEN_STAR TOKEN_ARROW TOKEN_ADDR
rlm@1 27 %token TOKEN_SIZEOF TOKEN_NUMBER
rlm@1 28 %left TOKEN_DOT TOKEN_ARROW '['
rlm@1 29 %expect 6
rlm@1 30 %%
rlm@1 31
rlm@1 32 final: expression { result = $1; }
rlm@1 33 ;
rlm@1 34
rlm@1 35 expression:
rlm@1 36 simple_expression { $$ = $1; } |
rlm@1 37 '(' expression ')' { $$ = $2; } |
rlm@1 38 expression TOKEN_DOT ident { $$ = exprNodeDot($1, $3); } |
rlm@1 39 expression TOKEN_ARROW ident { $$ = exprNodeArrow($1, $3); } |
rlm@1 40 expression '[' number ']' { $$ = exprNodeArray($1, $3); }
rlm@1 41 ;
rlm@1 42 simple_expression:
rlm@1 43 ident { $$ = $1; } |
rlm@1 44 TOKEN_STAR expression { $$ = exprNodeStar($2); } |
rlm@1 45 TOKEN_ADDR expression { $$ = exprNodeAddr($2); } |
rlm@1 46 TOKEN_SIZEOF '(' expression ')' { $$ = exprNodeSizeof($3); }
rlm@1 47 ;
rlm@1 48
rlm@1 49 number:
rlm@1 50 TOKEN_NUMBER { $$ = exprNodeNumber(); }
rlm@1 51 ;
rlm@1 52
rlm@1 53 ident:
rlm@1 54 TOKEN_IDENTIFIER {$$ = exprNodeIdentifier(); }
rlm@1 55 ;
rlm@1 56
rlm@1 57 %%
rlm@1 58
rlm@1 59 int yyerror(char *s)
rlm@1 60 {
rlm@1 61 return 0;
rlm@1 62 }
rlm@1 63
rlm@1 64 #ifndef SDL
rlm@1 65 extern FILE *yyin;
rlm@1 66 int main(int argc, char **argv)
rlm@1 67 {
rlm@1 68 // yydebug = 1;
rlm@1 69 ++argv, --argc;
rlm@1 70 if(argc > 0)
rlm@1 71 yyin = fopen(argv[0], "r");
rlm@1 72 else
rlm@1 73 yyin = stdin;
rlm@1 74 if(!yyparse())
rlm@1 75 result->print();
rlm@1 76 }
rlm@1 77 #endif