libcruft-util/cmdopt.ipp

94 lines
2.5 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 2013 Danny Robson <danny@nerdcruft.net>
*/
#ifdef __UTIL_CMDLINE_IPP
#error
#endif
#define __UTIL_CMDLINE_IPP
#include <sstream>
namespace util { namespace cmdopt {
///////////////////////////////////////////////////////////////////////////
template <typename T>
option::value<T>::value (std::string _name, T &_data):
base (std::move (_name)),
m_data (_data)
{ ; }
//-------------------------------------------------------------------------
template <typename T>
void
option::value<T>::execute (const char *restrict str)
{
try {
std::istringstream os (str);
os.exceptions (
std::istringstream::failbit
| std::istringstream::badbit
);
os >> m_data;
if (!os.eof ())
throw invalid_value (__func__);
} catch (...) {
throw invalid_value (__func__);
}
}
//-----------------------------------------------------------------------------
template <typename T>
T
option::value<T>::data (void) const
{
return m_data;
}
//-----------------------------------------------------------------------------
template <typename T>
T&
option::value<T>::data (void)
{
return m_data;
}
///////////////////////////////////////////////////////////////////////////
template <typename T, typename ...Args>
T&
parser::add (char shortname,
std::string longname,
std::string description,
Args&&... args)
{
// TODO: make use of the description with the help option
(void)description;
auto handler = std::make_unique<T> (longname, std::forward<Args> (args)...);
T& ref = *handler;
m_short.emplace_back (shortname, ref);
m_long .emplace_back (longname, ref);
m_options.emplace_back (std::move (handler));
return ref;
}
} }