Getting started guide for Boost.Spirit? [closed]
An introductory article from CP A JSON parser implemented using Boost.Spirit from CodeProject Spirit Application Repository
boost-spirit
Boolean expression (grammar) parser in c++
Here is an implementation based on Boost Spirit. Because Boost Spirit generates recursive descent parsers based on expression templates, honouring the ‘idiosyncratic’ (sic) precedence rules (as mentioned by others) is quite tedious. Therefore the grammar lacks a certain elegance. Abstract Data Type I defined a tree data structure using Boost Variant’s recursive variant support, note … Read more
How to parse space-separated floats in C++ quickly?
UPDATE Since Spirit X3 is available for testing, I’ve updated the benchmarks. Meanwhile I’ve used Nonius to get statistically sound benchmarks. All charts below are available interactive online Benchmark CMake project + testdata used is on github: https://github.com/sehe/bench_float_parsing Summary: Spirit parsers are fastest. If you can use C++14 consider the experimental version Spirit X3: The … Read more
What are the disadvantages of the Spirit parser-generator framework from boost.org?
It is a quite cool idea, and I liked it; it was especially useful to really learn how to use C++ templates. But their documentation recommends the usage of spirit for small to medium-size parsers. A parser for a full language would take ages to compile. I will list three reasons. Scannerless parsing. While it’s … Read more
boost spirit semantic action parameters
This a really good question (and also a can of worms) because it gets at the interface of qi and phoenix. I haven’t seen an example either, so I’ll extend the article a little in this direction. As you say, functions for semantic actions can take up to three parameters Matched attribute – covered in … Read more
What is the name of this unusual C++ template feature used by Boost.Spirit?
The arguments to a template do not necessarily have to be defined to be used. The use of “class roman” actually declares the class roman. Here is some example code: #include <iostream> template <class T> void foo(); template<> void foo<class roman>() { // allowed because roman is declared roman* pointer1; // not allowed because romania … Read more
more spirit madness – parser-types (rules vs int_parser) and meta-programming techniques
I’m not so sure I get the full extent of the question, but here are a few hints The line commented with // THIS is what I need to do. compiles fine with me (problem solved? I’m guessing you actually meant assigning a parser, not a rule?) Initialization of function-local static has been defined to … Read more