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Questions tagged [boost-spirit-lex]

60 questions
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boost spirit lexer on a stream does not tokenize "early" enough (too much lookahead?)

I'm using a boost::spirit::lex lexer to tokenize an input stream, using spirit::istream_iterators as described in Using Boost.Spirit.Lex and stream iterators . My problem is that lex::tokenize does not seem to output a token as "early" (along the…
nfomon
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Different types of semantic actions in Boost Spirit Lex

Can Boost's Spirit Lex have multiple semantic actions for a token definition? Consider this Lexer construction: namespace bp = boost::phoenix; this->self = lex::token_def<>("[ \v\f\t\r]+") | lex::token_def<>("\n")[++bp::ref(line_no)] |…
SiimKallas
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Boost::spirit illegal_backtracking exception

I use Boost.Spirit.Lex and .Qi for a simple calculator project and (as usual) it gives me some pain to debug and use. The debug prints: boost::spirit::multi_pass::illegal_backtracking This exception is thrown and I can't…
Pierre T.
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Boost::Spirit::Lex; How do I specify the token "||"?

So my question is quite simple, in my lexer class (extending lex::lexer), I have the following; this->self.add ... ("&&", AND_AND) ("||", OR_OR) ... Inside my constructor, which compiles just fine, but triggers a SegFault on…
Skeen
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Parsing a tokenized free form grammar with Boost.Spirit

I've got stuck trying to create a Boost.Spirit parser for the callgrind tool's output which is part of valgrind. Callgrind outputs a domain specific embedded programming language (DSEL) which lets you do all sorts of cool stuff like custom…
Niall Douglas
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How to ignore a token attribute from spirit::Lex when using spirit::qi?

When I use this qi grammar accepting tokens from Lex: pair %= token(ID_MARKER) >> ':' >> atom >> ',' >> atom ; in conjunction with this fusion/tuple mapping to assist in the capture: BOOST_FUSION_ADAPT_STRUCT( …
kfmfe04
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why does this boost::spirit::qi rule not work?

I have a grammar that defines the following rules: constantValue = qi::token(ID_FLOAT) | qi::token(ID_INTEGER); postfixExpression = primaryExpression | (postfixExpression >> qi::token(ID_OPENBRACKET) >> qi::token(ID_INTEGER) >>…
Tobias Langner
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Internal compiler error with Boost.Spirit

I'm trying to compile the following seemingly simple code using GCC 3.4.6 and Boost 1.43 and it's generating an internal compiler error: #include #include #include…
Haitham Gad
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Attribute compatibility not disabled by semantic actions

I have a grammar rule that looks like this: rule expr, factor; expr = ( +( ( toks.symbol // toks.symbol attribute type is an std::string [ // I'm trying to force…
Haitham Gad
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Need help with lexer runtime_error

I'm trying to write a C qi parser for a modified C language. When I un-comment the t_in_op and below section I get a run_time error stating Syntax Error: Hit BEGIN when '+' at index 1 (or something along those lines, don't remember exactly). What is…
Uday
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Boost.Spirit(2) Lex: strip_comments_lexer.cpp - not work?

boost_1_47_0/libs/spirit/example/lex/strip_comments_lexer.cpp Not strip C-style comments. Why?
knkd
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Converting a Boost actor_lexer to static: Error as if "actor_" not used

I'm converting a Boost Spirit Lex program to the static lexer model. The lexer has a semantic action, therefore the dynamic lexer is of type actor_lexer: #ifndef USE_STATIC_SI_LEXER typedef lex::lexertl::actor_lexer…
Felix Dombek
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Boost spirit how check value of token?

How I can check in next code that value of last tok.identifier is '='-character? parameter = ( tok.identifier >> ((lit(":") >> tok.identifier) | (tok.identifier >>…
Viola
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C++ boost::spirit lexer regex

I'm doing a simple lexer/parser with boost::spirit. This is the lexer : template struct word_count_tokens : lex::lexer { word_count_tokens() { …
user1746732
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Parsing a peculiar unary minus sign using Spirit.Lex

I'm trying to parse a language where a unary minus is distinguished from a binary minus by the whitespaces existing around the sign. Below are some pseudo rules defining how the minus sign is interpreted in this language: -x // unary x - y …
Haitham Gad
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