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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>
// string to_string(int val);
// string to_string(unsigned val);
// string to_string(long val);
// string to_string(unsigned long val);
// string to_string(long long val);
// string to_string(unsigned long long val);
// string to_string(float val);
// string to_string(double val);
// string to_string(long double val);
#include <limits>
#include <string>
#include <cassert>
#include <sstream>
template <class T>
void
test_signed()
{
{
std::string s = std::to_string(T(0));
assert(s.size() == 1);
assert(s[s.size()] == 0);
assert(s == "0");
}
{
std::string s = std::to_string(T(12345));
assert(s.size() == 5);
assert(s[s.size()] == 0);
assert(s == "12345");
}
{
std::string s = std::to_string(T(-12345));
assert(s.size() == 6);
assert(s[s.size()] == 0);
assert(s == "-12345");
}
{
std::string s = std::to_string(std::numeric_limits<T>::max());
assert(s.size() == std::numeric_limits<T>::digits10 + 1);
std::istringstream is(s);
T t(0);
is >> t;
assert(t == std::numeric_limits<T>::max());
}
{
std::string s = std::to_string(std::numeric_limits<T>::min());
std::istringstream is(s);
T t(0);
is >> t;
assert(t == std::numeric_limits<T>::min());
}
}
template <class T>
void
test_unsigned()
{
{
std::string s = std::to_string(T(0));
assert(s.size() == 1);
assert(s[s.size()] == 0);
assert(s == "0");
}
{
std::string s = std::to_string(T(12345));
assert(s.size() == 5);
assert(s[s.size()] == 0);
assert(s == "12345");
}
{
std::string s = std::to_string(std::numeric_limits<T>::max());
assert(s.size() == std::numeric_limits<T>::digits10 + 1);
std::istringstream is(s);
T t(0);
is >> t;
assert(t == std::numeric_limits<T>::max());
}
}
template <class T>
void
test_float()
{
{
std::string s = std::to_string(T(0));
assert(s.size() == 8);
assert(s[s.size()] == 0);
assert(s == "0.000000");
}
{
std::string s = std::to_string(T(12345));
assert(s.size() == 12);
assert(s[s.size()] == 0);
assert(s == "12345.000000");
}
{
std::string s = std::to_string(T(-12345));
assert(s.size() == 13);
assert(s[s.size()] == 0);
assert(s == "-12345.000000");
}
}
int main()
{
test_signed<int>();
test_signed<long>();
test_signed<long long>();
test_unsigned<unsigned>();
test_unsigned<unsigned long>();
test_unsigned<unsigned long long>();
test_float<float>();
test_float<double>();
test_float<long double>();
}
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