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fixing issues in MSVC, adding comments in MSVC-failing examples

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badair
2016-03-31 01:47:45 -05:00
parent 040dfe0088
commit 9cc2840b31
8 changed files with 196 additions and 55 deletions
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12
example/is_constexpr/function_object.cpp
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@@ -4,6 +4,10 @@ Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http ://boost.org/LICENSE_1_0.txt)
*/
// NOTE: Due to non-compliance in MSVC, is_constexpr always
// returns std::false_type on that compiler, which causes
// the static asserts below to fail.
#include <type_traits>
#include <callable_traits/callable_traits.hpp>
@@ -12,7 +16,7 @@ namespace ct = callable_traits;
//this is a constexpr function object (non-templated)
struct zero {
constexpr auto operator()() {
constexpr auto operator()() const {
return 0;
}
};
@@ -30,7 +34,7 @@ struct subtract {
// function accesses member names besides "type" and "value".
// Unary/binary operators and constructor calls are okay to use.
template<typename T1, typename T2>
constexpr auto operator()(T1, T2) {
constexpr auto operator()(T1, T2) const {
return T1{} - T2{};
}
};
@@ -43,7 +47,7 @@ static_assert(ct::is_constexpr(subtract{}), "");
//this is NOT a constexpr function object
struct add {
template<typename T1, typename T2>
auto operator()(T1, T2) {
auto operator()(T1, T2) const {
return T1{} + T2{};
}
};
@@ -70,4 +74,4 @@ static_assert(!ct::is_constexpr(multiply), "");
int main() {}
int main() {}