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Search found 67 results on 3 pages for 'yacc'.

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• how to download lex and lex.yy.c and yacc in ubuntu9.10 ? how to download lex and lex.yy.c and yacc

  - by Anudeep

  how to download lex and lex.yy.c and yacc in ubuntu9.10 ?

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• How To Compile YACC And LEX?

  - by nisha

  Actually I'm having YACC file as pos.yacc and LEX file name is pos1.lex.. while compilling I'm getting the folowing error... malathy@malathy:~$ cc lex.yy.c y.tab.c -ly -ll pos1.lex %{ #include "y.tab.h" int yylval; %} DIGIT [0-9]+ %% {DIGIT} {yylval=atoi(yytext);return DIGIT;} [\n ] {} . {return *yytext;} %% yacc file is pos.yacc %token…

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• how to download lex and lex.yy.c and yacc in ubuntu9.10 ? how to download lex and lex.yy.c and yacc

  - by Anudeep

  how to download lex and lex.yy.c and yacc in ubuntu9.10 ?

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• Looking for a Java grammar in lex/yacc format

  - by Ben

  Does anyone know an online repository for lex/yacc format grammars? I'm looking for a Java grammar to make a quicky sourcecode converter. Thank you!

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• Sharing memory among YACC, Lex, and C files

  - by sczizzo

  I have a YACC (Bison) grammar, a Lex (Flex) tokenizer, and a C program among which I need to share a struct (or really any variable). Currently, I declare the actual object in the grammar file and extern it wherever I need it (which is to say, my C source file), usually using a pointer to manipulate it. I have a shared header (and implementation)…

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• Python: Trouble with YACC

  - by Rosarch

  I'm parsing sentences like: "CS 2310 or equivalent experience" The desired output: [[("CS", 2310)], ["equivalent experience"]] YACC tokenizer symbols: tokens = [ 'DEPT_CODE', 'COURSE_NUMBER', 'OR_CONJ', 'MISC_TEXT', ] t_DEPT_CODE = r'[A-Z]{2,}' t_COURSE_NUMBER = r'[0-9]{4}' t_OR_CONJ = r'or' t_ignore = ' \t' terms =…

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• Unintentional concatenation in Bison/Yacc grammar.

  - by troutwine

  I am experimenting with lex and yacc and have run into a strange issue, but I think it would be best to show you my code before detailing the issue. This is my lexer: %{ #include <stdlib.h> #include <string.h> #include "y.tab.h" void yyerror(char *); %} %% [a-zA-Z]+ { yylval.strV = yytext; return ID; } [0-9]+ { …

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• Filter y.output from bison or yacc?

  - by acidzombie24

  I am using bison and its difficult to figure out the conflicts by looking at y.output. Is there a tool to make or filter y.output so its more useful? i would love to see the full path to the state with the conflict but anything helpful is what i would like.

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• Yacc and Lex inclusion confusion

  - by thejohnmeister

  I am wondering how to correctly compile a program with a Makefile that has calls to yyparse in it? This is what I do: I have a Makefile that compiles all my regular files and they have no connections to y.tab.c or lex.yy.c (Am I supposed to have them?) I do this on top of my code: #include "y.tab.c" #include "lex.yy.c" #include…

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• Python/YACC: Resolving a shift/reduce conflict

  - by Rosarch

  I'm using PLY. Here is one of my states from parser.out: state 3 (5) course_data -> course . (6) course_data -> course . course_list_tail (3) or_phrase -> course . OR_CONJ COURSE_NUMBER (7) course_list_tail -> . , COURSE_NUMBER (8) course_list_tail -> . , COURSE_NUMBER course_list_tail !…

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• Python/YACC Lexer: Token priority?

  - by Rosarch

  I'm trying to use reserved words in my grammar: reserved = { 'if' : 'IF', 'then' : 'THEN', 'else' : 'ELSE', 'while' : 'WHILE', } tokens = [ 'DEPT_CODE', 'COURSE_NUMBER', 'OR_CONJ', 'ID', ] + list(reserved.values()) t_DEPT_CODE = r'[A-Z]{2,}' t_COURSE_NUMBER = r'[0-9]{4}' t_OR_CONJ = r'or' t_ignore = ' \t' …

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• How to download lex and lex.yy.c and yacc in ubuntu9.10 ?

  - by Anudeep

  How to download lex and lex.yy.c and yacc in ubuntu9.10 ?

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• How to create a symbol table if given a grammar in a yacc file?

  - by Phenom

  I'm given a yacc file and I'm supposed to create a symbol table. What do I do after I use yacc on the file?

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• How do I generate different yyparse functions from lex/yacc for use in the same program?

  - by th

  Hi, I want to generate two separate parsing functions from lex/yacc. Normally yacc gives you a function yyparse() that you can call when you need to do some parsing, but I need to have several different yyparses each associated with different lexers and grammars. The man page seems to suggest the -p (prefix) flag, but this…

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• how to parse from command line arguements in yacc ?

  - by user205688

  how to parse from command line arguements in yacc ? of course i undefined input in both lex & yacc and then wrote int input(void) { printf("in input\n:"); char c; if(target > limit) return 0; if((c = target[0][offset++]) != '\0') return (c); target++; offset =0; return (' '); } where target contains the command…

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• How to get entire input string in Lex and Yacc?

  - by DevDevDev

  OK, so here is the deal. In my language I have some commands, say XYZ 3 5 GGB 8 9 HDH 8783 33 And in my Lex file XYZ { return XYZ; } GGB { return GGB; } HDH { return HDH; } [0-9]+ { yylval.ival = atoi(yytext); return NUMBER; } \n { return EOL; } In my yacc file start : commands ; commands : command |…

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• How to fix a warning message associated with strlen() used in Yacc?

  - by user547894

  Hello! Please i need your help. Basically, I am facing this warning message upon compiling with gcc, and am not able to deduce the error: Here are the details: The warning message i am receiving is literrally as follows: y.tab.c: In function ‘yyparse’: y.tab.c:1317 warning: incompatible implicit declaration of built-in…

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• How do I get Bison/YACC to not recognize a command until it parses the whole string?

  - by chucknelson

  I have some bison grammar: input: /* empty */ | input command ; command: builtin | external ; builtin: CD { printf("Changing to home directory...\n"); } | CD WORD printf("Changing to directroy %s\n", $2); } ; I'm wondering how I get Bison to not accept (YYACCEPT?) something as a…

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• identation control while developing a small python like language

  - by sap

  Hello, Im developing a small python like language using flex, byacc (for lexical and parsing) and C++, but i have a few questions regarding scope control. just as python it uses white spaces (or tabs) for identation, not only that but i want to implement index breaking like for instance if you type "break 2" inside a…

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• Indentation control while developing a small python like language

  - by sap

  Hello, I'm developing a small python like language using flex, byacc (for lexical and parsing) and C++, but i have a few questions regarding scope control. just as python it uses white spaces (or tabs) for indentation, not only that but i want to implement index breaking like for instance if you type "break 2" inside…

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• I need to develop a parser. Can I use Lex and Yacc for the purpose?

  - by Scrooge

  I need to extract very particular data from log files(of different types and formats). Since I am a recent college passout; my mind ran to using Lex and Yacc for the purpose. Now I have the following Questions 1. Will it be legal to do so ? (This product I am working for belongs to one of the biggest tech companies…

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• * * * * * * * * * * * * * * * * how t

  - by Anudeep

  how to download lex and lex.yy.c and yacc in ubuntu9.10 ?

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• C grammar in GCC source code

  - by Hrukai Whoever

  I'm looking for the C grammar in GCC source code, more specifically for the grammar in the yacc/bison form.

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• Tools to build a UI markup language parser

  - by Dan

  For a school project, I need to implement a parser for a (probably XML-based) markup language for User Interfaces. Based on the input it generates a HTML document with various UI components (textareas, inputs, panels, dialogs etc.) Do you have any suggestions for tools/libraries I might use for this? (At school we…

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• I'm trying to ressurrect UnderC C/C++ interpreter [closed]

  - by Domingo

  Hello ! I'm trying to ressurrect UnderC C/C++ interpreter https://code.google.com/p/underc-fltk/ and I got it to compile with modern mingw compilers 3.4.5 and up, I need some experts advice on some topics: -Yacc/Bison grammar (example some problems with recognizing "unsigned" alone and "friend class") -ARM…

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