My Project
svector.hh
Go to the documentation of this file.
1/* -*- mia-c++ -*-
2 *
3 * This file is part of MIA - a toolbox for medical image analysis
4 * Copyright (c) Leipzig, Madrid 1999-2017 Gert Wollny
5 *
6 * MIA is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with MIA; if not, see <http://www.gnu.org/licenses/>.
18 *
19 */
20
21#ifndef mia_core_svector_hh
22#define mia_core_svector_hh
23
24#include <istream>
25#include <ostream>
26#include <sstream>
27#include <vector>
28#include <stdexcept>
29
31#include <mia/core/typedescr.hh>
32
34
39template <typename T>
40std::ostream& operator << (std::ostream& os, const std::vector<T>& v)
41{
42 auto i = v.begin();
43 auto e = v.end();
44
45 if (i != e)
46 os << *i++;
47
48 while (i != e)
49 os << "," << *i++;
50
51 return os;
52}
53
54template <typename T>
56 static bool apply(const std::string& str, T& v)
57 {
58 char c;
59 std::istringstream s(str);
60 s >> v;
61
62 if (s.fail())
63 return false;
64
65 while (!s.eof() && s.peek() == ' ')
66 s >> c;
67
68 return s.eof();
69 }
70};
71
72template <>
73struct __dispatch_translate<std::string> {
74 static bool apply(const std::string& s, std::string& str)
75 {
76 str = s;
77 return true;
78 }
79};
80
81
82template <typename T>
83std::istream& operator >> (std::istream& is, std::vector<T>& v)
84{
85 std::vector<T> values;
86 std::string token;
87 T val;
88
89 while (std::getline(is, token, ',')) {
90 if (__dispatch_translate<T>::apply(token, val))
91 values.push_back(val);
92 else {
93 throw create_exception<std::invalid_argument>("Reading vector: value, '", token,
94 "' could not be translate to ",
95 mia::__type_descr<T>::value);
96 }
97 }
98
99 if (!v.empty() && v.size() != values.size()) {
100 throw create_exception<std::invalid_argument>("Reading vector: expected ",
101 v.size(), " values, but got ", values.size());
102 }
103
104 v.swap(values);
105 return is;
106}
107
108
110
111#endif
112
#define NS_MIA_BEGIN
conveniance define to start the mia namespace
Definition: defines.hh:33
#define NS_MIA_END
conveniance define to end the mia namespace
Definition: defines.hh:36
std::ostream & operator<<(std::ostream &os, const std::vector< T > &v)
implements the direct streaming of std::vectors.
Definition: svector.hh:40
static bool apply(const std::string &s, std::string &str)
Definition: svector.hh:74
static bool apply(const std::string &str, T &v)
Definition: svector.hh:56
std::istream & operator>>(std::istream &is, std::vector< T > &v)
Definition: svector.hh:83