Bison Syntax Error Unexpected $end
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Parse Error Syntax Error Unexpected End Of File
more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us syntax error unexpected end of file php Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like syntax error unexpected end of file bash you, helping each other. Join them; it only takes a minute: Sign up Bison: syntax error, unexpected end of file up vote 0 down vote favorite this is my thermo.l file %{ #include
Syntax Error Unexpected End Of File Wordpress
of line */; [ \t]+ /* ignore whitespace */; %% This is my thermo.y file %{ #include
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Syntax Error Unexpected End Of File Python
Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Bison unexpected indentifier error up vote 0 down http://stackoverflow.com/questions/24093406/bison-syntax-error-unexpected-end-of-file vote favorite %{ #include
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this http://stackoverflow.com/questions/1756275/bison-end-of-file site About Us Learn more about Stack Overflow the company Business Learn more https://www.gnu.org/s/bison/manual/html_node/Error-Reporting.html about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up bison end of syntax error file up vote 8 down vote favorite 3 If i forget to put an empty line at the end of any of my files my program gets a syntax error. The problem is my grammar expects a newline to end the current line. Since a newline doesnt exist bison generates a syntax error bc it does not finish the rule. How do i solve syntax error unexpected this? I tried making <> return MY_EOF BUT when i do that lex crashes a horrible death. I guess theres code in its default EOF that i am not calling. and i have no idea what functions they may be. Using EOF create the error symbol EOF is used, but is not defined as a token and has no rules yacc bison lex eof share|improve this question asked Nov 18 '09 at 14:14 acidzombie24 42.6k136454813 add a comment| 4 Answers 4 active oldest votes up vote 11 down vote accepted You could use a flex EOF rule to append a newline to the input: <
An action in the grammar can also explicitly proclaim an error, using the macro YYERROR (see Special Features for Use in Actions). The Bison parser expects to report the error by calling an error reporting function named yyerror, which you must supply. It is called by yyparse whenever a syntax error is found, and it receives one argument. For a syntax error, the string is normally "syntaxerror". If you invoke ‘%define parse.error verbose’ in the Bison declarations section (see The Bison Declarations Section), then Bison provides a more verbose and specific error message string instead of just plain "syntaxerror". However, that message sometimes contains incorrect information if LAC is not enabled (see LAC). The parser can detect one other kind of error: memory exhaustion. This can happen when the input contains constructions that are very deeply nested. It isn’t likely you will encounter this, since the Bison parser normally extends its stack automatically up to a very large limit. But if memory is exhausted, yyparse calls yyerror in the usual fashion, except that the argument string is "memoryexhausted". In some cases diagnostics like "syntaxerror" are translated automatically from English to some other language before they are passed to yyerror. See Internationalization. The following definition suffices in simple programs: void yyerror (char const *s) { fprintf (stderr, "%s\n", s); } After yyerror returns to yyparse, the latter will attempt error recovery if you have written suitable error recovery grammar rules (see Error Recovery). If recovery is impossible, yyparse will immediately return 1. Obviously, in location tracking pure parsers, yyerror should have an access to the current location. With %define api.pure, this is indeed the case for the GLR parsers, but not for the Yacc parser, for historical reasons, and this is the why %define api.pure full should be prefered over %define api.pure. When %locations %define api.pure full is used, yyerror has the following signature: void yyerror (YYLTYPE *locp, char const *msg); The prototypes are only indications of how the code produced by Bison uses yyerror. Bison-generated code always ignores the returned value, so yyerror can return any type, including void. Also, yyerror can be a variadic function; that is why the message is always passed last. Traditionally yyerror returns an int that is always ignored, but this is purely for historical reasons, and void is preferable since it more accurately describes the return type for yyerror. The variable yynerrs contains t