svector.hh
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/* -*- mia-c++ -*-
*
* This file is part of MIA - a toolbox for medical image analysis
* Copyright (c) Leipzig, Madrid 1999-2017 Gert Wollny
*
* MIA is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MIA; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef mia_core_svector_hh
#define mia_core_svector_hh
#include <istream>
#include <ostream>
#include <sstream>
#include <vector>
#include <stdexcept>
#include <mia/core/errormacro.hh>
#include <mia/core/typedescr.hh>
NS_MIA_BEGIN
template <typename T>
std::ostream& operator << (std::ostream& os, const std::vector<T>& v)
{
auto i = v.begin();
auto e = v.end();
if (i != e)
os << *i++;
while (i != e)
os << "," << *i++;
return os;
}
template <typename T>
struct __dispatch_translate {
static bool apply(const std::string& str, T& v)
{
char c;
std::istringstream s(str);
s >> v;
if (s.fail())
return false;
while (!s.eof() && s.peek() == ' ')
s >> c;
return s.eof();
}
};
template <>
struct __dispatch_translate<std::string> {
static bool apply(const std::string& s, std::string& str)
{
str = s;
return true;
}
};
template <typename T>
std::istream& operator >> (std::istream& is, std::vector<T>& v)
{
std::vector<T> values;
std::string token;
T val;
while (std::getline(is, token, ',')) {
if (__dispatch_translate<T>::apply(token, val))
values.push_back(val);
else {
throw create_exception<std::invalid_argument>("Reading vector: value, '", token,
"' could not be translate to ",
mia::__type_descr<T>::value);
}
}
if (!v.empty() && v.size() != values.size()) {
throw create_exception<std::invalid_argument>("Reading vector: expected ",
v.size(), " values, but got ", values.size());
}
v.swap(values);
return is;
}
NS_MIA_END
#endif
NS_MIA_BEGIN
#define NS_MIA_BEGIN
conveniance define to start the mia namespace
Definition defines.hh:33
NS_MIA_END
#define NS_MIA_END
conveniance define to end the mia namespace
Definition defines.hh:36
errormacro.hh
operator<<
std::ostream & operator<<(std::ostream &os, const std::vector< T > &v)
implements the direct streaming of std::vectors.
Definition svector.hh:40
create_exception
E create_exception(T ...t)
helper template to create exceptions with complex messages
Definition errormacro.hh:80
std
Definition gsl_iterator.hh:324
__dispatch_translate< std::string >::apply
static bool apply(const std::string &s, std::string &str)
Definition svector.hh:74
__dispatch_translate
Definition svector.hh:55
__dispatch_translate::apply
static bool apply(const std::string &str, T &v)
Definition svector.hh:56
operator>>
std::istream & operator>>(std::istream &is, std::vector< T > &v)
Definition svector.hh:83
typedescr.hh