Wandbox

Ran/Viewed Log

Author

anonymous

over 6 years ago

Language

C++

Compiler

gcc HEAD 9.0.0 20181216 (experimental)

Options

Warnings

Boost 1.69.0

C++2a(GNU)

no pedantic

Author

anonymous

over 6 years ago

tight_pair.h

$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.69.0/gcc-head/include -std=gnu++2a

prog.cc: In instantiation of 'constexpr bool binaryTraitAre_impl() [with Trait = std::is_convertible; First = int*; Second = void*; Rest = {}]':
prog.cc:9:80:   required from 'constexpr bool binaryTraitAre_impl() [with Trait = std::is_convertible; First = int; Second = int&; Rest = {int*, void*}]'
prog.cc:15:83:   required from here
prog.cc:9:80: error: no matching function for call to 'binaryTraitAre_impl<template<class _From, class _To> struct std::is_convertible>()'
    9 |         return Trait<First, Second>{}() and binaryTraitAre_impl<Trait, Rest...>();
      |                                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
prog.cc:3:17: note: candidate: 'template<template<class First, class Second> class Trait, class First, class Second, class ... Rest> constexpr bool binaryTraitAre_impl()'
    3 |  constexpr bool binaryTraitAre_impl()
      |                 ^~~~~~~~~~~~~~~~~~~
prog.cc:3:17: note:   template argument deduction/substitution failed:
prog.cc:9:80: note:   couldn't deduce template parameter 'First'
    9 |         return Trait<First, Second>{}() and binaryTraitAre_impl<Trait, Rest...>();
      |                                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~

Exit Code:

1