Questions tagged [boost-spirit-lex]
60 questions
15
votes
1 answer
How to benchmark Boost Spirit Parser?
I'm working on a compiler and I would like to improve its performances. I found that about 50% of the time is spent parsing the source files. As the source file are quite small and I do quite a lot of transformations after that, it seems to me that…
Baptiste Wicht
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10
votes
1 answer
I can't get the string value of a token
I try to implement a Lexer for a little programming language with Boost Spirit.
I have to get the value of a token and I get a bad_get exception :
terminate called after throwing an instance of 'boost::bad_get'
what(): boost::bad_get: failed…
Baptiste Wicht
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6
votes
1 answer
Why does this boost::spirit::qi rule not match the input?
I tried to continue to work on my previous example and expand the rules. My problem is, that rules that use ID_IDENTIFIER do not work - although I know that the lexer is working (using unit tests).
Here's the example:
#include…
Tobias Langner
- 10,634
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6
votes
1 answer
How do I implement include directives using boost::spirit::lex?
I have a simple configuration file parser built from spirit::lex and spirit::qi. When the lexer reaches the pattern include "path" I want the text of the file to be included. As you may know, spirit::lexer::begin() starts the scanning process:
//…
May Oakes
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5
votes
1 answer
Troubles with boost::spirit::lex & whitespace
I try learning to use boost::spirit. To do that, I wanted to create some simple lexer, combine them and then start parsing using spirit. I tried modifying the example, but it doesn't run as expected (the result r isn't true).
Here's the…
Tobias Langner
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5
votes
1 answer
How do I convert a boost::spirit::lex token's value from iterator_range to a string?
When I try to convert the value of a token from iterator_range, the lexer fails when attempting to read the next token.
Here's the Tokens struct which holds the token definitions: (I don't think this is relevant but I'm including just in…
May Oakes
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4
votes
2 answers
How to go about adding a symbol table interface to boost::spirit::lex based lexer?
To implement support for typedef you'd need to lookup the symbol table when ever the lexer identifies a identifier and return a different token. This is easily done in flex lexer. I am trying to use boost Spirit to build the parser and looked about…
Uday
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4
votes
1 answer
Using lexer token attributes in grammar rules with Lex and Qi from Boost.Spirit
Let's consider following code:
#include
#include
#include
#include
#include
#include
#include
#include…
Adam Badura
- 5,069
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4
votes
1 answer
boost spirit: how to match any lexer token in qi?
I would like to match a C++ function declaration with default argument values, but ignoring these values.
For example:
int myFunction(int a, int b = 5 + 4);
Here is (a part of) the lexer:
struct Lexer : boost::spirit::lex::lexer
{
…
ZeeByeZon
- 112
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4
votes
3 answers
Boost Spirit Signals Successful Parsing Despite Token Being Incomplete
I have a very simple path construct that I am trying to parse with boost spirit.lex.
We have the following grammar:
token := [a-z]+
path := (token : path) | (token)
So we're just talking about colon separated lower-case ASCII strings here.
I have…
Craig Wright
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4
votes
1 answer
How do I use a qi::symbols parser to match tokens from a spirit lexer using no_case?
I have a lexer based on spirit::lexertl that produces tokens defined with lex::token_def. I'd like to use a qi::symbols<> table to match tokens in that table, using the associated data from the symbol table as the attribute in the rule.…
Tim Ruddick
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3
votes
2 answers
How to use a pointer as token attribute in Boost::Spirit::Lex?
I write a minimum example to demonstrate this problem. It parses nested list of numbers like (1 2 3 (4 5) (6 (7 (8)))). I use spirit::lex to parse number and spirit::qi to parse list, so I code like this:
using TokenTypes =…
yhgu2000
- 193
- 6
3
votes
2 answers
cannot get boost::spirit parser&lexer working for token types other than std::string or int or double
This does not compile (code below).
There was another question here with the same error. But I don't understand the answer. I already tried inserting qi::eps in places -- but without success.
I also tried already adding meta functions…
user8434768
3
votes
1 answer
Whitespace skipper when using Boost.Spirit Qi and Lex
Let's consider following code:
#include
#include
#include
#include
#include
#include
#include
namespace lex =…
Adam Badura
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3
votes
1 answer
Can`t compile boost spirit example4.cpp
I am continuing to learn the Boost Spirit library and I have some issue with example that I couldn`t compile. The source of example you can find here: source place. Also you can look at this code and compile result on Coliru.
#include…
AeroSun
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