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Questions - flex-lexer

dyld[38909]: symbol not found in flat namespace '_yylex'

I have recently upgraded all installed components in macports. Post the upgradation, cscope has stopped working. when invoked on commandlind it exits with the following error $ cscope dyld[39064]: sy...
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Sudheer Hebbale

flex-lexer

cscope

Votes: 0

Answers: 1

Latest Answer

You had also asked this question in a MacPorts bug report where I eventually discovered that the problem only occurred on macOS 12 (Monterey) and only because MacPorts was running strip on the binary ...
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ryandesign

Segmentation fault with yacc/bison

I am trying to write a simple HTTP request parser for a school assignment but I have this segmentation fault that I can't get rid of. I think that my production rules are ok. I have executed bison wit...
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Zlatan Radovanovic

c

parsing

bison

flex-lexer

yacc

Votes: 0

Answers: 2

Latest Answer

HEADER: ID COLON STRING { $$ = (char *)malloc(sizeof(char)*(strlen($1)+1+strlen($2)+1)); sprintf($$, "%s:%s", $1, $3); }; Shouldn't you use strlen($3) in the expression, where you c...
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Jakob Stark

CMake project with flex/bison

I'm working on an hobby project in C++, using flex and bison. I'm using CMake as my build system, and I had struggle in making all work together. I'm quite new to CMake so the documentation seems quit...
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Alessandro Bertulli

c++

cmake

include

bison

flex-lexer

Votes: 0

Answers: 1

Latest Answer

If I were you I would have: flexbison/CMakeLists.txt: ... add_library(parserlib STATIC ${FLEX_lexer_OUTPUTS} ${BISON_parser_OUTPUTS} ) target_include_directories(parserlib PUBLIC $<BUILD_INT...
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Mizux

Flex: unrecognized rule `(?s:.)`

In my flex program, I am unable to use any of these regex. Usage of any of them are generating unrecognized rule error. %{ #include<stdio.h> %} %option nodefault %option noyywrap %option outfil...
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Sourav Kannantha B

regex

tokenize

flex-lexer

lex

Votes: 0

Answers: 1

Latest Answer

You need to update your flex installation if you want to use those constructs. Flex 2.5.4, which was released more than 25 years ago, does not implement {-} nor does it implement any of the (?:...) sy...
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rici

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