71 lines
1.4 KiB
Plaintext
71 lines
1.4 KiB
Plaintext
%{
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#include "c_analyzer.tab.h"
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int line_number = 1;
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void yyerror(const char *s) {
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fprintf(stderr,
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"\033[91m\nError at line %i: %s near '%s'\033[0m\n",
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line_number,
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s,
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yytext);
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}
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%}
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%%
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"{" { return LBRACE; }
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"}" { return RBRACE; }
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"(" { return LPAREN; }
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")" { return RPAREN; }
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";" { return SEMICOLON; }
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"=" { return ASSIGN; }
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"+" { return PLUS; }
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"-" { return MINUS; }
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"*" { return MULT; }
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"/" { return DIV; }
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"%" { return MOD; }
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"&&" { return AND; }
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"||" { return OR; }
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"!" { return NOT; }
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"<" { return LT; }
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">" { return GT; }
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"return" { return RET; }
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"print" { return PRINT; }
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"while" { return WHILE; }
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"do" { return DO; }
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"if" { return IF; }
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"else" { return ELSE; }
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"func" { return FUNC; }
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"," { return COMMA; }
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"//" {
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int c;
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while ((c = input()) != '\n' && c != 0);
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if (c == '\n') line_number++;
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}
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"/*" {
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int c, prev = 0;
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while ((c = input()) != 0) {
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if (c == '\n') line_number++;
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if (prev == '*' && c == '/') break;
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prev = c;
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}
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if (c == 0) yyerror("Unterminated comment");
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}
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[0-9]+ { yylval.str = strdup(yytext); return NUMBER; }
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[a-zA-Z_][a-zA-Z0-9_]* { yylval.str = strdup(yytext); return IDENTIFIER; }
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[ \t] ;
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\n { line_number++; }
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. { yyerror("Invalid character"); }
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%%
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int yywrap() {
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return 1;
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} |