47 lines
418 B
Plaintext
47 lines
418 B
Plaintext
%{
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int yylex(void);
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static void yyerror(const char *);
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%}
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%union {
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int ival;
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double dval;
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}
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%type <tag2> recur
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%token NUMBER
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%%
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expr : '(' recur ')'
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{ $$ = $2; }
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;
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recur : NUMBER
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{ $$ = 1; }
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;
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%%
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#include <stdio.h>
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int
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main(void)
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{
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printf("yyparse() = %d\n", yyparse());
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return 0;
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}
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int
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yylex(void)
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{
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return -1;
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}
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static void
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yyerror(const char* s)
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{
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printf("%s\n", s);
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}
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