lex

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how to setup flex/bison rules for parsing a comma-delimited argument list

I would like to be able to parse a non-empty, one-or-many element, comma-delimited (and optionally parenthesized) list using flex/bison parse ru开发者_运维技巧les.[详细]

2023-03-10 13:46 分类：问答
Boost.Spirit: Lex + Qi error reporting

I am writing a parser for quite complicated config files that make use of indentation etc. I decided to use Lex to break input into tokens as it seems to make life easier. The problem is that I cannot[详细]

2023-03-04 08:00 分类：问答
Using Ocamllex for lexing strings (The Tiger Compiler)

I\'m trying to follow Appel\'s \"Modern Compiler Implementation in ML\" and am writing the lexer using Ocamllex.[详细]

2023-02-28 16:39 分类：问答
lextestpass.l:384: error: expected expression before ‘int’

So I have this definition in a header file (actually the y.tab.h file): typedef enum yytokentype { TOKEN_UNKNOWN = 1000,[详细]

2023-02-27 05:10 分类：问答
Any differences between terms parse trees and derivation trees?

The terms AST (Abstract Syntax Tree), parse tree and derivation tree are bandied about by different people when referring to the result of parsing texts conforming to a grammar. Assuming we are talkin[详细]

2023-02-27 01:55 分类：问答
Extra right brace in yacc output

My lex file has: word [^{}\"=,\\t\\n@\\\\ ]+ \\{{ return(LBRACE); } \\}{ return(RBRACE); } {word}{ yylval = yytext; printf(\"WORD=%s\",yytext); return(WORD);[详细]

2023-02-26 20:33 分类：问答
Regex for strings in Bibtex

I\'m trying to parse Bibtex files using lex/yacc. Strings in the bibtex database can be surrounded by quotes \"...\" or with braces - {...}[详细]

2023-02-26 07:18 分类：问答
semantic phase of c compiler

if write 1=a in the sample c program, it doesnt detect it as an error. How do i solve this problem? Also how do i do global and local scope of variables. Thanks if anyone can solve it[详细]

2023-02-25 09:39 分类：问答
Error compiling Lex output in C++

When I compile Lex\'s output as C++, I get these errors: $ make [6%] Building CXX object lib/CMakeFiles/lang.dir/lex_lexer.cpp.o[详细]

2023-02-25 09:39 分类：问答
Parsing: library functions, FSM, explode() or lex/yacc?

When I have to parse text (e.g. config files or other rather simple/descriptive languages), there are several solutions that come to my mind:[详细]

2023-02-25 06:05 分类：问答