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stringify.hpp
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stringify.hpp
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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef __STOUT_STRINGIFY_HPP__
#define __STOUT_STRINGIFY_HPP__
#include <iostream> // For 'std::cerr' and 'std::endl'.
#include <list>
#include <map>
#include <set>
#include <sstream> // For 'std::ostringstream'.
#include <string>
#include <vector>
#ifdef __WINDOWS__
// `codecvt` is not available on older versions of Linux. Until it is needed on
// other platforms, it's easiest to just build the UTF converter for Windows.
#include <codecvt>
#include <locale>
#endif // __WINDOWS__
#include "abort.hpp"
#include "hashmap.hpp"
#include "set.hpp"
template <typename T>
std::string stringify(const T& t)
{
std::ostringstream out;
out << t;
if (!out.good()) {
ABORT("Failed to stringify!");
}
return out.str();
}
// We provide an explicit overload for strings so we do not incur the overhead
// of a stringstream in generic code (e.g., when stringifying containers of
// strings below).
inline std::string stringify(const std::string& str)
{
return str;
}
#ifdef __WINDOWS__
inline std::string stringify(const std::wstring& str)
{
// Convert UTF-16 `wstring` to UTF-8 `string`.
static std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>, wchar_t>
converter(
"UTF-16 to UTF-8 conversion failed",
L"UTF-16 to UTF-8 conversion failed");
return converter.to_bytes(str);
}
inline std::wstring wide_stringify(const std::string& str)
{
// Convert UTF-8 `string` to UTF-16 `wstring`.
static std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>, wchar_t>
converter(
"UTF-8 to UTF-16 conversion failed",
L"UTF-8 to UTF-16 conversion failed");
return converter.from_bytes(str);
}
#endif // __WINDOWS__
inline std::string stringify(bool b)
{
return b ? "true" : "false";
}
template <typename T>
std::string stringify(const std::set<T>& set)
{
std::ostringstream out;
out << "{ ";
typename std::set<T>::const_iterator iterator = set.begin();
while (iterator != set.end()) {
out << stringify(*iterator);
if (++iterator != set.end()) {
out << ", ";
}
}
out << " }";
return out.str();
}
template <typename T>
std::string stringify(const std::list<T>& list)
{
std::ostringstream out;
out << "[ ";
typename std::list<T>::const_iterator iterator = list.begin();
while (iterator != list.end()) {
out << stringify(*iterator);
if (++iterator != list.end()) {
out << ", ";
}
}
out << " ]";
return out.str();
}
template <typename T>
std::string stringify(const std::vector<T>& vector)
{
std::ostringstream out;
out << "[ ";
typename std::vector<T>::const_iterator iterator = vector.begin();
while (iterator != vector.end()) {
out << stringify(*iterator);
if (++iterator != vector.end()) {
out << ", ";
}
}
out << " ]";
return out.str();
}
template <typename K, typename V>
std::string stringify(const std::map<K, V>& map)
{
std::ostringstream out;
out << "{ ";
typename std::map<K, V>::const_iterator iterator = map.begin();
while (iterator != map.end()) {
out << stringify(iterator->first);
out << ": ";
out << stringify(iterator->second);
if (++iterator != map.end()) {
out << ", ";
}
}
out << " }";
return out.str();
}
template <typename T>
std::string stringify(const hashset<T>& set)
{
std::ostringstream out;
out << "{ ";
typename hashset<T>::const_iterator iterator = set.begin();
while (iterator != set.end()) {
out << stringify(*iterator);
if (++iterator != set.end()) {
out << ", ";
}
}
out << " }";
return out.str();
}
template <typename K, typename V>
std::string stringify(const hashmap<K, V>& map)
{
std::ostringstream out;
out << "{ ";
typename hashmap<K, V>::const_iterator iterator = map.begin();
while (iterator != map.end()) {
out << stringify(iterator->first);
out << ": ";
out << stringify(iterator->second);
if (++iterator != map.end()) {
out << ", ";
}
}
out << " }";
return out.str();
}
#endif // __STOUT_STRINGIFY_HPP__