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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <string>
// UNSUPPORTED: c++98, c++03, c++11, c++14
// UNSUPPORTED: libcpp-no-deduction-guides
// template<class InputIterator,
// class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
// basic_string(InputIterator, InputIterator, Allocator = Allocator())
// -> basic_string<typename iterator_traits<InputIterator>::value_type,
// char_traits<typename iterator_traits<InputIterator>::value_type>,
// Allocator>;
//
// The deduction guide shall not participate in overload resolution if InputIterator
// is a type that does not qualify as an input iterator, or if Allocator is a type
// that does not qualify as an allocator.
#include <string>
#include <iterator>
#include <cassert>
#include <cstddef>
#include "test_macros.h"
class NotAnItertor {};
template <typename T>
struct NotAnAllocator { typedef T value_type; };
int main()
{
{ // Not an iterator at all
std::basic_string s1{NotAnItertor{}, NotAnItertor{}, std::allocator<char>{}}; // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'basic_string'}}
}
{ // Not an input iterator
const char16_t* s = u"12345678901234";
std::basic_string<char16_t> s0;
std::basic_string s1{std::back_insert_iterator(s0), // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'basic_string'}}
std::back_insert_iterator(s0),
std::allocator<char16_t>{}};
}
{ // Not an allocator
const wchar_t* s = L"12345678901234";
std::basic_string s1{s, s+10, NotAnAllocator<wchar_t>{}}; // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'basic_string'}}
}
}
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