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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 T>
// basic_string& assign(const T& t, size_type pos, size_type n=npos); // C++17
#include <string>
#include <stdexcept>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
template <class S, class SV>
void
test(S s, SV sv, typename S::size_type pos, typename S::size_type n, S expected)
{
if (pos <= sv.size())
{
s.assign(sv, pos, n);
LIBCPP_ASSERT(s.__invariants());
assert(s == expected);
}
#ifndef TEST_HAS_NO_EXCEPTIONS
else
{
try
{
s.assign(sv, pos, n);
assert(false);
}
catch (std::out_of_range&)
{
assert(pos > sv.size());
}
}
#endif
}
template <class S, class SV>
void
test_npos(S s, SV sv, typename S::size_type pos, S expected)
{
if (pos <= sv.size())
{
s.assign(sv, pos);
LIBCPP_ASSERT(s.__invariants());
assert(s == expected);
}
#ifndef TEST_HAS_NO_EXCEPTIONS
else
{
try
{
s.assign(sv, pos);
assert(false);
}
catch (std::out_of_range&)
{
assert(pos > sv.size());
}
}
#endif
}
int main()
{
{
typedef std::string S;
typedef std::string_view SV;
test(S(), SV(), 0, 0, S());
test(S(), SV(), 1, 0, S());
test(S(), SV("12345"), 0, 3, S("123"));
test(S(), SV("12345"), 1, 4, S("2345"));
test(S(), SV("12345"), 3, 15, S("45"));
test(S(), SV("12345"), 5, 15, S(""));
test(S(), SV("12345"), 6, 15, S("not happening"));
test(S(), SV("12345678901234567890"), 0, 0, S());
test(S(), SV("12345678901234567890"), 1, 1, S("2"));
test(S(), SV("12345678901234567890"), 2, 3, S("345"));
test(S(), SV("12345678901234567890"), 12, 13, S("34567890"));
test(S(), SV("12345678901234567890"), 21, 13, S("not happening"));
test(S("12345"), SV(), 0, 0, S());
test(S("12345"), SV("12345"), 2, 2, S("34"));
test(S("12345"), SV("1234567890"), 0, 100, S("1234567890"));
test(S("12345678901234567890"), SV(), 0, 0, S());
test(S("12345678901234567890"), SV("12345"), 1, 3, S("234"));
test(S("12345678901234567890"), SV("12345678901234567890"), 5, 10,
S("6789012345"));
}
#if TEST_STD_VER >= 11
{
typedef std::basic_string <char, std::char_traits<char>, min_allocator<char>> S;
typedef std::basic_string_view<char, std::char_traits<char> > SV;
test(S(), SV(), 0, 0, S());
test(S(), SV(), 1, 0, S());
test(S(), SV("12345"), 0, 3, S("123"));
test(S(), SV("12345"), 1, 4, S("2345"));
test(S(), SV("12345"), 3, 15, S("45"));
test(S(), SV("12345"), 5, 15, S(""));
test(S(), SV("12345"), 6, 15, S("not happening"));
test(S(), SV("12345678901234567890"), 0, 0, S());
test(S(), SV("12345678901234567890"), 1, 1, S("2"));
test(S(), SV("12345678901234567890"), 2, 3, S("345"));
test(S(), SV("12345678901234567890"), 12, 13, S("34567890"));
test(S(), SV("12345678901234567890"), 21, 13, S("not happening"));
test(S("12345"), SV(), 0, 0, S());
test(S("12345"), SV("12345"), 2, 2, S("34"));
test(S("12345"), SV("1234567890"), 0, 100, S("1234567890"));
test(S("12345678901234567890"), SV(), 0, 0, S());
test(S("12345678901234567890"), SV("12345"), 1, 3, S("234"));
test(S("12345678901234567890"), SV("12345678901234567890"), 5, 10,
S("6789012345"));
}
#endif
{
typedef std::string S;
typedef std::string_view SV;
test_npos(S(), SV(), 0, S());
test_npos(S(), SV(), 1, S());
test_npos(S(), SV("12345"), 0, S("12345"));
test_npos(S(), SV("12345"), 1, S("2345"));
test_npos(S(), SV("12345"), 3, S("45"));
test_npos(S(), SV("12345"), 5, S(""));
test_npos(S(), SV("12345"), 6, S("not happening"));
}
{
std::string s = "ABCD";
std::string_view sv = "EFGH";
char arr[] = "IJKL";
s.assign("CDEF", 0); // calls assign(const char *, len)
assert(s == "");
s.clear();
s.assign("QRST", 0, std::string::npos); // calls assign(string("QRST", pos, len)
assert(s == "QRST");
s.clear();
s.assign(sv, 0); // calls assign(T, pos, npos)
assert(s == sv);
s.clear();
s.assign(sv, 0, std::string::npos); // calls assign(T, pos, npos)
assert(s == sv);
s.clear();
s.assign(arr, 0); // calls assign(const char *, len)
assert(s == "");
s.clear();
s.assign(arr, 0, std::string::npos); // calls assign(string("IJKL"), pos, npos)
assert(s == "IJKL");
s.clear();
s.assign(arr, 0); // calls assign(const char *, len)
assert(s == "");
s.clear();
}
{
std::string s = "ABCD";
std::string_view sv = s;
s.assign(sv);
assert(s == "ABCD");
sv = s;
s.assign(sv, 0, std::string::npos);
assert(s == "ABCD");
}
{
std::string s = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
std::string_view sv = s;
s.assign(sv);
assert(s == "ABCDEFGHIJKLMNOPQRSTUVWXYZ");
sv = s;
s.assign(sv, 0, std::string::npos);
assert(s == "ABCDEFGHIJKLMNOPQRSTUVWXYZ");
}
}
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