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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <string>
// template<class InputIterator>
// basic_string& assign(InputIterator first, InputIterator last); // constexpr since C++20
#include <string>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
#include "min_allocator.h"
#include "asan_testing.h"
template <class S, class It>
TEST_CONSTEXPR_CXX20 void test(S s, It first, It last, S expected) {
s.assign(first, last);
LIBCPP_ASSERT(s.__invariants());
assert(s == expected);
LIBCPP_ASSERT(is_string_asan_correct(s));
}
#ifndef TEST_HAS_NO_EXCEPTIONS
struct Widget {
operator char() const { throw 42; }
};
template <class S, class It>
void test_exceptions(S s, It first, It last) {
S original = s;
typename S::iterator begin = s.begin();
typename S::iterator end = s.end();
try {
s.assign(first, last);
assert(false);
} catch (...) {
}
// Part of "no effects" is that iterators and pointers
// into the string must not have been invalidated.
LIBCPP_ASSERT(s.__invariants());
assert(s == original);
assert(s.begin() == begin);
assert(s.end() == end);
}
#endif
template <class S>
TEST_CONSTEXPR_CXX20 void test_string() {
{
const char* s = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
test(S(), s, s, S());
test(S(), s, s + 1, S("A"));
test(S(), s, s + 10, S("ABCDEFGHIJ"));
test(S(), s, s + 52, S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"));
test(S("12345"), s, s, S());
test(S("12345"), s, s + 1, S("A"));
test(S("12345"), s, s + 10, S("ABCDEFGHIJ"));
test(S("12345"), s, s + 52, S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"));
test(S("1234567890"), s, s, S());
test(S("1234567890"), s, s + 1, S("A"));
test(S("1234567890"), s, s + 10, S("ABCDEFGHIJ"));
test(S("1234567890"), s, s + 52, S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"));
test(S("12345678901234567890"), s, s, S());
test(S("12345678901234567890"), s, s + 1, S("A"));
test(S("12345678901234567890"), s, s + 10, S("ABCDEFGHIJ"));
test(S("12345678901234567890"), s, s + 52, S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"));
test(S(), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), S());
test(S(), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s + 1), S("A"));
test(S(), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s + 10), S("ABCDEFGHIJ"));
test(S(),
cpp17_input_iterator<const char*>(s),
cpp17_input_iterator<const char*>(s + 52),
S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"));
test(S("12345"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), S());
test(S("12345"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s + 1), S("A"));
test(S("12345"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s + 10), S("ABCDEFGHIJ"));
test(S("12345"),
cpp17_input_iterator<const char*>(s),
cpp17_input_iterator<const char*>(s + 52),
S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"));
test(S("1234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), S());
test(S("1234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s + 1), S("A"));
test(S("1234567890"),
cpp17_input_iterator<const char*>(s),
cpp17_input_iterator<const char*>(s + 10),
S("ABCDEFGHIJ"));
test(S("1234567890"),
cpp17_input_iterator<const char*>(s),
cpp17_input_iterator<const char*>(s + 52),
S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"));
test(S("12345678901234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), S());
test(S("12345678901234567890"),
cpp17_input_iterator<const char*>(s),
cpp17_input_iterator<const char*>(s + 1),
S("A"));
test(S("12345678901234567890"),
cpp17_input_iterator<const char*>(s),
cpp17_input_iterator<const char*>(s + 10),
S("ABCDEFGHIJ"));
test(S("12345678901234567890"),
cpp17_input_iterator<const char*>(s),
cpp17_input_iterator<const char*>(s + 52),
S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"));
}
#ifndef TEST_HAS_NO_EXCEPTIONS
if (!TEST_IS_CONSTANT_EVALUATED) { // test iterator operations that throw
typedef ThrowingIterator<char> TIter;
typedef cpp17_input_iterator<TIter> IIter;
const char* s = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
test_exceptions(S(), IIter(TIter(s, s + 10, 4, TIter::TAIncrement)), IIter(TIter()));
test_exceptions(S(), IIter(TIter(s, s + 10, 5, TIter::TADereference)), IIter(TIter()));
test_exceptions(S(), IIter(TIter(s, s + 10, 6, TIter::TAComparison)), IIter(TIter()));
test_exceptions(S(), TIter(s, s + 10, 4, TIter::TAIncrement), TIter());
test_exceptions(S(), TIter(s, s + 10, 5, TIter::TADereference), TIter());
test_exceptions(S(), TIter(s, s + 10, 6, TIter::TAComparison), TIter());
Widget w[100];
test_exceptions(S(), w, w + 100);
}
#endif
{ // test assigning to self
S s_short = "123/";
S s_long = "Lorem ipsum dolor sit amet, consectetur/";
s_short.assign(s_short.begin(), s_short.end());
assert(s_short == "123/");
s_short.assign(s_short.begin() + 2, s_short.end());
assert(s_short == "3/");
s_long.assign(s_long.begin(), s_long.end());
assert(s_long == "Lorem ipsum dolor sit amet, consectetur/");
s_long.assign(s_long.begin() + 30, s_long.end());
assert(s_long == "nsectetur/");
}
{ // test assigning a different type
const std::uint8_t p[] = "ABCD";
S s;
s.assign(p, p + 4);
assert(s == "ABCD");
}
{ // regression-test assigning to self in sneaky ways
S sneaky = "hello";
sneaky.resize(sneaky.capacity(), 'x');
S expected = sneaky + S(1, '\0');
test(sneaky, sneaky.data(), sneaky.data() + sneaky.size() + 1, expected);
}
}
TEST_CONSTEXPR_CXX20 bool test() {
test_string<std::string>();
#if TEST_STD_VER >= 11
test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char> > >();
#endif
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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