libcruft-util/parse.hpp

54 lines
1.5 KiB
C++

/*
* 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.
*
* Copyright 2017 Danny Robson <danny@nerdcruft.net>
*/
#ifndef CRUFT_UTIL_PARSE_HPP
#define CRUFT_UTIL_PARSE_HPP
#include <cstring>
#include <string>
#include <iterator>
namespace util {
///////////////////////////////////////////////////////////////////////////
/// extracts an instance of a native type T from the string [first, last).
///
/// throws std::invalid_argument when the type cannot be parsed.
template <typename T>
T
parse (const char *first, const char *last);
//-------------------------------------------------------------------------
template <typename T>
T
parse (const char *str)
{
return parse<T> (str, str + strlen (str));
}
//-------------------------------------------------------------------------
template <typename T>
T
parse (const std::string &str)
{
return parse<T> (std::cbegin (str), std::cend (str));
}
}
#endif