Squashed 'externals/mp/' changes from 29cb5588d..649fde1e8

649fde1e8 typelist: Add drop
5efe868da travis: Drop GCC 7 from CI
c3f890f17 Update to use new metavalue types
c4dd1c9b9 metavalue: Add some common operations
7da45c71b Remove unnecessary public keyword for struct inheritance
287d8e7ec Correct typos in file headers

git-subtree-dir: externals/mp
git-subtree-split: 649fde1e814f9ce5b04d7ddeb940244d9f63cb2f
This commit is contained in:
MerryMage 2020-04-22 21:06:56 +01:00
parent 7b0c47d3f0
commit 1925d4dcc6
22 changed files with 460 additions and 24 deletions

View file

@ -5,16 +5,16 @@
#pragma once
#include <type_traits>
#include <mp/metavalue/value.h>
namespace mp {
/// Is type T an instance of template class C?
template <template <class...> class, class>
struct is_instance_of_template : public std::false_type {};
struct is_instance_of_template : false_type {};
template <template <class...> class C, class... As>
struct is_instance_of_template<C, C<As...>> : public std::true_type {};
struct is_instance_of_template<C, C<As...>> : true_type {};
/// Is type T an instance of template class C?
template<template <class...> class C, class T>