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Implement LWG#2579: Inconsistency wrt Allocators in basic_string assignment vs. basic_string::assign

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@263042 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow
2016-03-09 18:08:29 +00:00
parent ff0b9f5749
commit f40ec90389
2 changed files with 35 additions and 11 deletions
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34
test/std/strings/basic.string/string.modifiers/string_assign/string.pass.cpp
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@@ -15,7 +15,9 @@
#include <string>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
#include "test_allocator.h"
template <class S>
void
@@ -26,6 +28,16 @@ test(S s, S str, S expected)
assert(s == expected);
}
template <class S>
void
testAlloc(S s, S str, const typename S::allocator_type& a)
{
s.assign(str);
assert(s.__invariants());
assert(s == str);
assert(s.get_allocator() == a);
}
int main()
{
{
@@ -50,7 +62,22 @@ int main()
test(S("12345678901234567890"), S("1234567890"), S("1234567890"));
test(S("12345678901234567890"), S("12345678901234567890"),
S("12345678901234567890"));
testAlloc(S(), S(), std::allocator<char>());
testAlloc(S(), S("12345"), std::allocator<char>());
testAlloc(S(), S("1234567890"), std::allocator<char>());
testAlloc(S(), S("12345678901234567890"), std::allocator<char>());
}
{ // LWG#5579 make sure assign takes the allocators where appropriate
typedef other_allocator<char> A; // has POCCA --> true
typedef std::basic_string<char, std::char_traits<char>, A> S;
testAlloc(S(A(5)), S(A(3)), A(3));
testAlloc(S(A(5)), S("1"), A());
testAlloc(S(A(5)), S("1", A(7)), A(7));
testAlloc(S(A(5)), S("1234567890123456789012345678901234567890123456789012345678901234567890", A(7)), A(7));
}
#if TEST_STD_VER >= 11
{
typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
@@ -74,9 +101,14 @@ int main()
test(S("12345678901234567890"), S("1234567890"), S("1234567890"));
test(S("12345678901234567890"), S("12345678901234567890"),
S("12345678901234567890"));
testAlloc(S(), S(), min_allocator<char>());
testAlloc(S(), S("12345"), min_allocator<char>());
testAlloc(S(), S("1234567890"), min_allocator<char>());
testAlloc(S(), S("12345678901234567890"), min_allocator<char>());
}
#endif
#if __cplusplus > 201402L
#if TEST_STD_VER > 14
{
typedef std::string S;
static_assert(noexcept(S().assign(S())), ""); // LWG#2063