Questions tagged [boost-spirit-lex]
60 questions
2
votes
1 answer
Flipping the order of subrules inside a rule in a boost::spirit grammar results in segfault
Warning; while I tried to shorten the code down, to a minimum. I still had to include quite a bit, to ensure that the required information was present.
This code, compiles files, and runs resulting in a syntax error;
name = simple_name […
Skeen
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2
votes
1 answer
Boost::spirit get value from non-terminal
I have this, in my boost::spirit grammar;
paren = (qi::token(LEFT_PAREN) >> character >> qi::token(RIGHT_PAREN)) [ build_paren ]
;
character = qi::token(CHARACTER) [ build_character]
;
Where these are defined…
Skeen
- 4,614
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2
votes
1 answer
unhandled exception using Boost Spirit to parse grammar
I am trying to use Boost Spirit to parse the following grammar:
sentence:
noun verb
sentence conjunction sentence
conjunction:
"and"
noun:
"birds"
"cats"
verb:
"fly"
"meow"
parsing succeeds when the grammar only includes noun >> verb rule.
when…
user2149346
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2
votes
1 answer
cannot compile boost-spirit example for changing token value using Phoenix actor
When i try to compile the code below (using the example from boost\spirit\home\lex\argument.hpp: value_setter) I get the following compiler error:
c:\program files (x86)\boost\boost_1_50\boost\range\iterator.hpp(63) : error C2039: 'type' : is not a…
coproc
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2
votes
1 answer
conversion to token_def's value type
When I define in lexical analyzer
typedef boost::mpl::vector
token_value_types;
lex::token_def lit_uint("[0-9]+", token_ids::lit_uint);
and then use it in some grammar as
primary_expr =
…
Tomilov Anatoliy
- 15,657
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2
votes
1 answer
how to get spirit's qi::as_string to work with repeat?
For some odd reason, I can't get qi::as_string[] to work with repeat()[].
Parsing std::string str = { "{ +100S+++ ;\n }" };, I get the following OUTPUT
PLUS OR MINUS+
THREE PLUS OR MINUS
PARSED FINE
-------------------------
Parsing…
kfmfe04
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2
votes
1 answer
Trouble with boost::spirit::lex - punctuation characters
I want to create a lex::token_def<> that contains character sequences like '[' or ']' or '&>'
I tried escaping the necessary characters:
namespace lex = boost::spirit::lex;
enum LexerIDs { ID_IDENTIFIER, ID_WHITESPACE, ID_INTEGER, ID_FLOAT,…
Tobias Langner
- 10,634
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2
votes
1 answer
Retrieving the ID of a token_def<>
Is it possible to retrieve the ID of a token defined in the lexer like this: token_def<> tok; from inside the semantic action of a Spirit parser.
What I'm trying to do is to use the token ID of every operator (like +, -, *, etc.) and retrieve a…
Haitham Gad
- 1,529
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2
votes
1 answer
Eliminating syntactic sugar using Spirit.Qi
I'm trying to parse a lisp-like language which has some syntactic sugar for common functions. For example, the plus function can be written as (+ 1 2) or as 1 + 2. I'm thinking that eliminating syntactic sugar before trying to interpret the language…
Haitham Gad
- 1,529
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1
vote
1 answer
I can't get Semantic actions in Boost Spirit's lexer functionality to compile
So, I'm using boost 1.47.0 and I've been trying to put together a lexer.
My goal is to add to some of the tokens of my lexer a semantic action containing
spirit::lex::_pass = spirit::lex::pass_flags::pass_ignore. However, I haven't been able to get…
Bill Lynch
- 80,138
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1
vote
1 answer
Why boost spirit lex hung instead parse error?
I long time didnt work with boost::spirit and back again. And stuck at simple case (omg, sometimes I want to kill this library...why why why so simple task is so complex with boost).
#include
#include
#include…
AeroSun
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1
vote
1 answer
Spirit Fails to Parse After only Appearing to get First symbol From the Lexer
Recently, I asked a question here:
Boost Spirit Segfault In Parser
In this post it was pointed out the grammar I was working with was absolutely left recursive and that spirit is a PEG parser generator, meaning left recursion is impossible.
I…
joshu
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1
vote
1 answer
Can`t compile boost spirit word_count_lexer example
I am continuing to learn the Boost Spirit library and have comile 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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1
vote
1 answer
Why does qi::skip fail with tokens from the lexer?
I'm using boost::spirit lex and qi to parse some source code.
I already skip white spaces from the input string using the lexer. What I would like to do is to switch skipping the comments depending on the context in the parser.
Here is a basic demo.…
ZeeByeZon
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1
vote
1 answer
How to use a slash in Spirit Lex patterns?
Code below compiles fine with
clang++ -std=c++11 test.cpp -o test
But when running an exception is thrown
terminate called after throwing an instance of
'boost::lexer::runtime_error'
what(): Lookahead ('/') is not supported yet.
The…
user1587451
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