boost-spirit-x3

Boost Spirit X3: “Attribute does not have the expected size,” but why does it care?

由 半腔热情 提交于 2019-12-10 14:23:04
问题 I am trying to write a parser with Spirit X3, but I haven't gotten very far because I'm running into a compilation error that I can't figure out. I think I know what the compiler is complaining about, but what I don't understand is why it cares. The following code compiles (clang 3.9, Boost 1.62.0) and works. (I realize it's structured poorly and that there are built-in parsers for constants; I'm just trying to demonstrate the issue.) #define BOOST_SPIRIT_X3_DEBUG #include <iostream> #include

eps parser that can fail for a “post-initialization” that could fail

由 只谈情不闲聊 提交于 2019-12-10 11:44:58
问题 I'm reading the Boost X3 Quick Start tutorial and noticed the line eps is a special spirit parser that consumes no input but is always successful. We use it to initialize the rule's synthesized attribute, to zero before anything else. [...] Using eps this way is good for doing pre and post initializations. Now I can't help but wonder if an eps_that_might_fail would be useful to do some sort of semantic/post analysis on a part of the parsed input, which could fail, to have some sort of

Can spirit X3 work with BOOST_FUSION_ADAPT_ADT?

由 ╄→гoц情女王★ 提交于 2019-12-10 10:14:54
问题 Change my codes from QI to X3, and get some compile error with BOOST_FUSION_ADAPT_ADT . I tried boost 1.64 and 1.67, neither of them work. I modified the spirit X3 example rexpr_min , adding getter and setter to struct rexpr , changing the BOOST_FUSION_ADAPT_STRUCT to BOOST_FUSION_ADAPT_ADT , and compile it fail, too. Enviroment: ubuntu 16.04 G++ 5.4, with -std=c++17 flag boost 1.67 Error message: boost/spirit/home/x3/core/detail/parse_into_container.hpp:142:35: error: invalid initialization

Eleminating left recursion in parser rule of spirit x3

由 梦想与她 提交于 2019-12-09 02:38:27
问题 I am currently stuck with a rule I am trying to parse using boost spirit x3. Here is te EBNF(using the % operator from spirit for lists) for what I am trying to parse: type ::= class_type | lambda_type lambda_type ::= more_arg_lambda | one_arg_lambda more_arg_lambda ::= "(", type%",", ")", "=>", type one_arg_lambda ::= type, "=>", type <- here is the left recursion class_type ::= identifier%"::", ["<", type%",", ">"] usng boost spirit x3, I am trying to parse into the following struct/variant

Simple sematic action destroys the result in Spirit X3

由 为君一笑 提交于 2019-12-08 12:45:53
问题 I have this Spirit X3 parser auto xyz_def = x3::omit[x3::int_] >> x3::eol >> (x3::lexeme[+(x3::char_ - x3::eol)]) >> x3::eol >> (*(chemical::parser::atom >> x3::eol) ; Which parses, with no problem something like this 2 Comment H 1.2 3.2 4.5 C 1.1 9.1 8.5 Now I want to use (instead of completely ignoring) the first integer as a hint to help build the vector (from the Kleen*). To do that I do: auto xyz_def = x3::omit[x3::int_[([](auto& ctx){x3::_val(ctx).reserve(x3::_attr(ctx));})]] >> x3::eol

Boost spirit x3 example calculator (calc8, calc9) linker error

由 若如初见. 提交于 2019-12-08 08:28:23
问题 I'm very new with boost spirit (and with boost). Its very interesting library. I use qtcreator + MinGW 5.3. I simply add every source file from git_hub_calc8 into new project and add some boost library, but i got the following error trying to build (All other examples work fine) C:\Program Files\boost\boost\boost\spirit\home\x3\nonterminal\rule.hpp:113: ошибка: undefined reference to `bool client::parser::parse_rule<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char,

Recursive x3 parser with results passing around

由 流过昼夜 提交于 2019-12-08 02:23:47
问题 (1) Say we want to parse a simple recursive block surrounded by {} . { Some text. { { Some more text. } Some Text again. {} } } This recursive parser is quite simple. x3::rule<struct idBlock1> const ruleBlock1{"Block1"}; auto const ruleBlock1_def = x3::lit('{') >> *( ruleBlock1 | (x3::char_ - x3::lit('}')) ) >> x3::lit('}'); BOOST_SPIRIT_DEFINE(ruleBlock1) (2) Then the block becomes more complex. It could also be surrounded by [] . { Some text. [ { Some more text. } Some Text again. [] ] } We

X3, how to populate a more complex AST?

由 别来无恙 提交于 2019-12-08 02:20:05
问题 Trying to generate an AST like the employee example that has more than just the employee. In my current mindset, the RExpressions example isn't helping me. The example I have doesn't compile, but I went as far as I understood in adding teams, departments, and corporations to the employee example. My problem is in understanding how to add the different structs into a variant and add the variant to phrase_parse, if that's the idea. In this example, there can be several of the same lines

Boost Spirit X3 AST not working with semantic actions when using separate rule definition and instantiation

由 谁说我不能喝 提交于 2019-12-07 04:44:16
问题 I am trying to use Boost Spirit X3 with semantic actions while parsing the structure to an AST. If I use a rule without separate definition and instantiation it works just fine, for example: #include <vector> #include <string> #include <iostream> #include <boost/fusion/include/adapt_struct.hpp> #include <boost/spirit/home/x3.hpp> namespace ast { struct ast_struct { int number; std::vector<int> numbers; }; } BOOST_FUSION_ADAPT_STRUCT( ast::ast_struct, (int, number) (std::vector<int>, numbers)

Boost spirit x3 example calculator (calc8, calc9) linker error

由 蹲街弑〆低调 提交于 2019-12-06 16:45:38
I'm very new with boost spirit (and with boost). Its very interesting library. I use qtcreator + MinGW 5.3. I simply add every source file from git_hub_calc8 into new project and add some boost library, but i got the following error trying to build (All other examples work fine) C:\Program Files\boost\boost\boost\spirit\home\x3\nonterminal\rule.hpp:113: ошибка: undefined reference to `bool client::parser::parse_rule<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::spirit::x3::context<boost::spirit::x3::error
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