mirror of https://github.com/boostorg/mp11.git synced 2026-07-05 08:00:48 +02:00

T

Jonathan Poelen b21ff00f9b optimize mp_transform_if (extract f from the struct to benefit from memoization)

compiler |       gcc-12      |      clang-15
before   | 0:00.13s - 60432K | 0:00.16s - 100956K
after    | 0:00.11s - 47300K | 0:00.16s - 100484K

```cpp
using namespace boost::mp11;

template<class T> using p = mp_bool<T::value & 1>;
template<class T> using f = mp_size_t<T::value + 1>;
template<class I> using test = mp_transform_if<p, f, mp_iota<I>>;

using r1 = mp_transform<test, mp_iota_c<50>>;
```

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.github/workflows

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include/boost

optimize mp_transform_if (extract f from the struct to benefit from memoization)

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meta

Add "cxxstd" json field. The "cxxstd" json field is being added to each Boost library's meta json information for libraries whose minumum C++ standard compilation level is C++11 on up. The value of this field matches one of the values for 'cxxstd' in Boost.Build. The purpose of doing this is to provide information for the Boost website documentation for each library which will specify the minimum C++ standard compilation that an end-user must employ in order to use the particular library. This will aid end-users who want to know if they can successfully use a Boost library based on their C++ compiler's compilation level, without having to search the library's documentation to find this out.

2020-12-15 21:51:31 -05:00

test

Test mp_fold and mp_reverse_fold with std::pair. Refs #108 .

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tools

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CMakeLists.txt

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README.md

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README.md

Mp11, a C++11 metaprogramming library

Mp11 is a C++11 metaprogramming library based on template aliases and variadic templates. It implements the approach outlined in the article "Simple C++11 metaprogramming" and its sequel.

Mp11 is part of Boost, starting with release 1.66.0. It however has no Boost dependencies and can be used standalone, as a Git submodule, for instance. For CMake users, add_subdirectory is supported, as is installation and find_package(boost_mp11).

Supported compilers

g++ 4.8 or later
clang++ 3.9 or later
Visual Studio 2013 or later

Tested on Github Actions and Appveyor.

License

Distributed under the Boost Software License, Version 1.0.

Languages

C++ 99.1%

CMake 0.5%

Python 0.1%

Shell 0.1%

Batchfile 0.1%