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Questions tagged [boost-spirit-x3]

LL parser framework represents parsers directly as EBNF grammars in inlined C++14

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spirit::x3 parser does move_to as std::string in test, but does it with Char in another app

I have the following test that works fine in a test app but in my big code it doesn't compile. What happens is that the parser is trying to hand me Char instead of a std::string. I've looked for any possible reason I would get different result, but,…
lakeweb
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Boost.Spirit X3 -- operator minus does not work as expected

Consider the following code: TEST_CASE("Requirements Parser Description", "[test]") { namespace x3 = ::boost::spirit::x3; std::string s = "### Description\n\nSome\nmultiline\ntext." "\n\n### Attributes"; std::string…
Markus W.
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apply 'with<>' to a skipper parser to get context

My first version of this question was rich with misunderstandings. My answer below suits my needs. But I kept at it to understand what could be done with with<>. What I get is that it intended to inject context into a parser. Then the parser is…
lakeweb
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Defining strict_real_policies for reals with a comma decimal character

I would like to create a custom policy derived from strict_real_policies that will parse reals, such as "3,14", i.e. with a comma decimal point as used e.g. in Germany. That should be easy, right?
Niels Holst
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Simple parsing to a tuple fails

Why does this not compile? The marked line gives me: "static assertion failed: The parser expects tuple-like attribute type". I would think that an std::tuple were the essence of "tuple-like"? #include #include #include…
Niels Holst
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Boost Spirit X3 parse grammar a^(2n+1)

I am using Boost Spirit X3 to parse some grammars but I encountered some errors which I can not explain. The code below is the simplified version of what I am trying to do. #ifndef BOOST_SPIRIT_X3_NO_RTTI #define…
mibu
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Boost Spirit X3 Algebra Parser (With variables)

I've been writing a parser for algebraic expressions with spirit x3. My goal is to build upon the calc4c example parser so that it includes expressions with variables, exponents, and parentheses as a multiplication operator. I've been working on…
sheetkey
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Assign value to a "global" variable from a lambda function

I'm using the boost spirit x3 semantic parser as lambda functions. I would to like assign the value of string to an "external" variable, but my code doesn't work: template bool comment(Iterator first, Iterator last) { string…
Claudio La Rosa
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Embedding a parser from a separate translation unit into another parser

I am trying to reuse a parser (named parser1_rule) that I have isolated in a translation unit (unit1.h/unit1.cpp), into another parser (name trace_parser). However I get a warning and an error message (reproduced and reformated below for easier…
Heyji
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Boost spirit x3 - how to parse nested structures?

I try to parse list fldName I used the nested structures. But I have a trouble with parsing when one structure nested in other. Look at the sollowing minimal sample code: #include #include…
AeroSun
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How do I change the code from this example

How can I change the code source to display the result? I could not convert to boost spirit x3 Live Code #include #include #include #include #include…
AlexY
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Boost Spirit performance considerations (Date parsing)

I have been refactoring (while learning) some existing hand massaged date parsing routines with Boost Spirit. My main aim has been to try to do a single and unified interface to be able to parse dates represented in multiple different ways.…
Lauri
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How to deal with Boost Spirit X3 causing a "static initialization order fiasco" in Visual Studio 2019?

I'm working on a nontrivial parser in C++ on top of boost::spirit::x3. I am splitting up my parsing code into logical units some of which are dependencies of each other. For example, one unit is an expression parser that also exposes an indentifier…
jwezorek
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Parsing multiple CSS selectors with Boost Spirit X3

I am trying to parse multiple CSS selectors with Boost Spirit X3. If I have the following CSS rule that apply to multiple IDs (selectors) for example: #ID1, #ID2, #ID3 { color:#000000; } Where #ID1, #ID2, #ID3 are the selectors, color:#000000; is…
Jaime Ivan Cervantes
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boost spirit x3 error handler with expectations

I want to create a parser using boost::spirit::x3 for line based files, e.g. every line has the same structure and can be repeated. Further I want some detailed error description in case there is an error. Finally it should be possible that the file…
Max
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