127 lines
3.1 KiB
C++
127 lines
3.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <string>
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// string to_string(int val);
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// string to_string(unsigned val);
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// string to_string(long val);
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// string to_string(unsigned long val);
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// string to_string(long long val);
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// string to_string(unsigned long long val);
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// string to_string(float val);
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// string to_string(double val);
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// string to_string(long double val);
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#include <string>
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#include <cassert>
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#include <sstream>
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template <class T>
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void
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test_signed()
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{
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{
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std::string s = std::to_string(T(0));
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assert(s.size() == 1);
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assert(s[s.size()] == 0);
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assert(s == "0");
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}
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{
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std::string s = std::to_string(T(12345));
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assert(s.size() == 5);
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assert(s[s.size()] == 0);
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assert(s == "12345");
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}
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{
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std::string s = std::to_string(T(-12345));
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assert(s.size() == 6);
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assert(s[s.size()] == 0);
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assert(s == "-12345");
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}
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{
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std::string s = std::to_string(std::numeric_limits<T>::max());
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assert(s.size() == std::numeric_limits<T>::digits10 + 1);
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std::istringstream is(s);
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T t(0);
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is >> t;
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assert(t == std::numeric_limits<T>::max());
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}
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{
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std::string s = std::to_string(std::numeric_limits<T>::min());
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std::istringstream is(s);
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T t(0);
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is >> t;
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assert(t == std::numeric_limits<T>::min());
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}
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}
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template <class T>
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void
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test_unsigned()
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{
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{
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std::string s = std::to_string(T(0));
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assert(s.size() == 1);
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assert(s[s.size()] == 0);
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assert(s == "0");
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}
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{
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std::string s = std::to_string(T(12345));
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assert(s.size() == 5);
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assert(s[s.size()] == 0);
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assert(s == "12345");
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}
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{
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std::string s = std::to_string(std::numeric_limits<T>::max());
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assert(s.size() == std::numeric_limits<T>::digits10 + 1);
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std::istringstream is(s);
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T t(0);
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is >> t;
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assert(t == std::numeric_limits<T>::max());
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}
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}
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template <class T>
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void
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test_float()
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{
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{
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std::string s = std::to_string(T(0));
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assert(s.size() == 8);
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assert(s[s.size()] == 0);
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assert(s == "0.000000");
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}
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{
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std::string s = std::to_string(T(12345));
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assert(s.size() == 12);
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assert(s[s.size()] == 0);
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assert(s == "12345.000000");
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}
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{
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std::string s = std::to_string(T(-12345));
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assert(s.size() == 13);
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assert(s[s.size()] == 0);
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assert(s == "-12345.000000");
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}
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}
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int main()
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{
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test_signed<int>();
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test_signed<long>();
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test_signed<long long>();
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test_unsigned<unsigned>();
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test_unsigned<unsigned long>();
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test_unsigned<unsigned long long>();
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test_float<float>();
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test_float<double>();
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test_float<long double>();
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}
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