Bison Syntax Error Unexpected Identifier
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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 site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting syntax error unexpected identifier mongodb ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join syntax error unexpected identifier expecting class 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 mongoimport syntax error unexpected identifier minute: Sign up Bison unexpected indentifier error up vote 0 down vote favorite %{ #include
Javascript Syntax Error Unexpected Identifier
TOKPASSWORD VALUE SPACE NEWLINE input: auth input | input; delim: SPACE | NEWLINE; auth: TOKMACHINE delim VALUE delim TOKLOGIN delim VALUE delim TOKPASSWORD delim VALUE delim { printf("Found auth {%s,%s,%s}", $1,$3,$5); }; Here is simple bison grammar, with which I want to parse .netrc file. But I get error on input line: netrc.y:23.1-5: syntax error, unexpected identifier: I am new to Flex/Bison, but this example near literal copy from here c bison share|improve this question edited Aug 24 '12 at 18:28 Jens node.js syntax error unexpected identifier 36.2k863104 asked Aug 24 '12 at 18:18 KAction 1,035718 Line 23 is input: auth input | input;; columns 1-5 are the identifier input, which seems to be what it's complaining about. I don't remember bison well enough to figure out the problem. –Keith Thompson Aug 24 '12 at 18:25 This is anything but a near literal copy. Look at the original example exactly and you'll spot a handful of differences, all resulting in various errors. Yacc is unforgiving. –Jens Aug 24 '12 at 18:46 @Jens Of course, this question is about Bison, not Yacc, but they are part of the same bestiary... ;-) –twalberg Aug 24 '12 at 20:00 add a comment| 2 Answers 2 active oldest votes up vote 2 down vote accepted Looks like you are missing the %% delimiter. Make that %} %token ... %% input : ... share|improve this answer answered Aug 24 '12 at 18:38 Jens 36.2k863104 I tried that myself on the OP's code. It gets rid of the error message but introduces several more, including fatal error: start symbol input does not derive any sentence. –Keith Thompson Aug 24 '12 at 18:41 That would spark another few questions, I guess :-) Contrary to the poster's claim, the referenced copy is vastly different. –Jens Aug 24 '12 at 18:44 Well, probably I was't right with literally word. It is close in sence that uses nothing more c
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Syntax Error Unexpected Token
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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, http://stackoverflow.com/questions/12114673/bison-unexpected-indentifier-error helping each other. Join them; it only takes a minute: Sign up syntax error, unexpected identifier, expecting type. yacc. bison up vote 0 down vote favorite I am making a calculator with the sum and subtraction operations this is my code... Calc.y %{ #include %} %union{ double dval; } %token NUMERO %token SUMA RESTA %token ABRIR CERRAR %token http://stackoverflow.com/questions/20296057/syntax-error-unexpected-identifier-expecting-type-yacc-bison END %left SUMA RESTA %left NEG %type Expresion %start Input %% Input: Line | Input Line ; Line: END | Expresion END { printf("Resultado: %f\n",$1); } ; Expresion: NUMERO { $$=$1; } | Expresion SUMA Expresion { $$=$1+$3; } | Expresion RESTA Expresion { $$=$1-$3; } | RESTA Expresion %prec NEG { $$=-$2; } | ABRIR Expresion CERRAR { $$=$2; } ; %% int yyerror(char *s) { printf("%s\n",s); } int main(void) { yyparse(); } And this is the error Calc.y:16.7-15: syntax error, unexpected identifier, expecting type bison yacc share|improve this question asked Nov 30 '13 at 3:11 user3051124 12 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote The syntax of the %type directive is %type
topics Evaluation software Community Events Search developerWorks developerWorksTechnical topicsLinuxTechnical library Better error handling using Flex and BisonTips for building more user-friendly compilers and interpreters Although it is easy to generate programs using Flex and Bison, it is a bit harder to http://www.ibm.com/developerworks/library/l-flexbison/ make those programs produce user-friendly syntax and semantic error messages. This article examines the error-handling features of Flex and Bison, shows how to use them, and details some pitfalls. PDF (209 KB) | Share: Christian Hagen (chagen@de.ibm.com), Senior IT Architect, IBM Close [x] Christian Hagen is a Senior IT Architect with IBM Global Business Services, Application Services. Although he works as an IT architect, he likes to go back to syntax error the basics and do some programming. 28 July 2006 Also available inRussian Table of contents Introduction Sample source files Sample with plain error messages Extending Bison for better error messages A better input function Bison's location mechanism Conclusion Download Resources Comments IntroductionAs UNIX® developers know, Flex and Bison are powerful tools for developing lexical and grammar parsers, in particular language compilers and interpreters. If you're unfamiliar with these utilities or the syntax error unexpected tools they implement -- Lex and Yacc, respectively -- check the Resources section in this article for links to the Flex and Bison documentation and to additional articles that introduce both programs.This article covers a somewhat more advanced topic: features and techniques for putting better error-handling capabilities into your compiler or interpreter. To illustrate these techniques, I use a sample program called ccalc, which implements an enhanced calculator based on the infix calculator from the Bison handbook. You can download ccalc and associated files from the Download section at the end of this article.The enhancements include the use of variables. In ccalc, a variable is defined through its first use in an initialization such as a = 3. If a variable is used before it is initialized, a semantic error is generated, the variable is created with a value of zero, and a message is printed. Sample source filesThe sample source code consists of seven files: ccalc.c: The main program and some functions for input, output, and error processing ccalc.h:: Included definitions for all modules cmath.c: Mathematical functions parse.y: Input grammar for Bison lex.l Input for Flex makefile: A simple makefile defs.txt: Sample input file The program accepts two parameters: -debug: Produces debugging output filename: The name of th