Author
anonymous
about 5 years ago
Language
C++
Compiler
clang 9.0.0
Options
Warnings
Boost 1.72.0
C++2a(GNU)
no pedantic
Author
anonymous
about 5 years ago
$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.72.0/clang-9.0.0/include -std=gnu++2a prog.cc:7:17: error: non-type template argument specializes a template parameter with dependent type 'typename std::enable_if<std::is_integral<T>::value, std::nullptr_t>::type'
struct Hoge<T*, nullptr> {
^
prog.cc:2:96: note: template parameter is declared here
template<typename T, typename std::enable_if<std::is_integral<T>::value, std::nullptr_t>::type = nullptr>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^
prog.cc:2:46: error: failed requirement 'std::is_integral<int *>::value'; 'enable_if' cannot be used to disable this declaration
template<typename T, typename std::enable_if<std::is_integral<T>::value, std::nullptr_t>::type = nullptr>
^~~~~~~~~~~~~~~~~~~~~~~~~~
prog.cc:11:39: note: while substituting prior template arguments into non-type template parameter [with T = int *]
static_assert(std::is_same_v<typename Hoge<int*>::type, int>);
^~~~~~~~~~
prog.cc:11:48: note: while checking a default template argument used here
static_assert(std::is_same_v<typename Hoge<int*>::type, int>);
~~~~~~~~~^
prog.cc:11:51: error: expected a qualified name after 'typename'
static_assert(std::is_same_v<typename Hoge<int*>::type, int>);
^
prog.cc:11:51: error: unknown type name 'type'
4 errors generated.
Exit Code:
1