VTK  9.2.6
vtkVariantExtract.h
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1/*=========================================================================
2
3 Program: Visualization Toolkit
4 Module: vtkVariantExtract.h
5
6-------------------------------------------------------------------------
7 Copyright 2008 Sandia Corporation.
8 Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
9 the U.S. Government retains certain rights in this software.
10-------------------------------------------------------------------------
11
12 Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
13 All rights reserved.
14 See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
15
16 This software is distributed WITHOUT ANY WARRANTY; without even
17 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
18 PURPOSE. See the above copyright notice for more information.
19
20=========================================================================*/
21
38#ifndef vtkVariantExtract_h
39#define vtkVariantExtract_h
40
41#include "vtkVariant.h"
42#include <typeinfo> // for typeid
43
44template <typename T>
45T vtkVariantExtract(const vtkVariant& value, bool& valid)
46{
47 vtkGenericWarningMacro(
48 << "Cannot convert vtkVariant containing [" << value.GetTypeAsString() << "] "
49 << "to unsupported type [" << typeid(T).name() << "]. "
50 << "Create a vtkVariantExtract<> specialization to eliminate this warning.");
51
52 valid = false;
53
54 static T dummy;
55 return dummy;
56}
57
58template <>
59inline char vtkVariantExtract<char>(const vtkVariant& value, bool& valid)
60{
61 valid = value.IsChar();
62 return valid ? value.ToChar() : 0;
63}
64
65template <>
66inline unsigned char vtkVariantExtract<unsigned char>(const vtkVariant& value, bool& valid)
67{
68 valid = value.IsUnsignedChar();
69 return valid ? value.ToUnsignedChar() : 0;
70}
71
72template <>
73inline short vtkVariantExtract<short>(const vtkVariant& value, bool& valid)
74{
75 valid = value.IsShort();
76 return valid ? value.ToShort() : 0;
77}
78
79template <>
80inline unsigned short vtkVariantExtract<unsigned short>(const vtkVariant& value, bool& valid)
81{
82 valid = value.IsUnsignedShort();
83 return valid ? value.ToUnsignedShort() : 0;
84}
85
86template <>
87inline int vtkVariantExtract<int>(const vtkVariant& value, bool& valid)
88{
89 valid = value.IsInt();
90 return valid ? value.ToInt() : 0;
91}
92
93template <>
94inline unsigned int vtkVariantExtract<unsigned int>(const vtkVariant& value, bool& valid)
95{
96 valid = value.IsUnsignedInt();
97 return valid ? value.ToUnsignedInt() : 0;
98}
99
100template <>
101inline long vtkVariantExtract<long>(const vtkVariant& value, bool& valid)
102{
103 valid = value.IsLong();
104 return valid ? value.ToLong() : 0;
105}
106
107template <>
108inline unsigned long vtkVariantExtract<unsigned long>(const vtkVariant& value, bool& valid)
109{
110 valid = value.IsUnsignedLong();
111 return valid ? value.ToUnsignedLong() : 0;
112}
113
114template <>
115inline long long vtkVariantExtract<long long>(const vtkVariant& value, bool& valid)
116{
117 valid = value.IsLongLong();
118 return valid ? value.ToLongLong() : 0;
119}
120
121template <>
123 const vtkVariant& value, bool& valid)
124{
125 valid = value.IsUnsignedLongLong();
126 return valid ? value.ToUnsignedLongLong() : 0;
127}
128
129template <>
130inline float vtkVariantExtract<float>(const vtkVariant& value, bool& valid)
131{
132 valid = value.IsFloat();
133 return valid ? value.ToFloat() : 0.0f;
134}
135
136template <>
137inline double vtkVariantExtract<double>(const vtkVariant& value, bool& valid)
138{
139 valid = value.IsDouble();
140 return valid ? value.ToDouble() : 0.0;
141}
142
143template <>
145{
146 valid = value.IsString();
147 return valid ? value.ToString() : vtkStdString();
148}
149
150template <>
151inline vtkVariant vtkVariantExtract<vtkVariant>(const vtkVariant& value, bool& valid)
152{
153 valid = true;
154 return value;
155}
156
157#endif
158
159// VTK-HeaderTest-Exclude: vtkVariantExtract.h
Wrapper around std::string to keep symbols short.
A atomic type representing the union of many types.
Definition vtkVariant.h:70
vtkVariant vtkVariantExtract< vtkVariant >(const vtkVariant &value, bool &valid)
long long vtkVariantExtract< long long >(const vtkVariant &value, bool &valid)
double vtkVariantExtract< double >(const vtkVariant &value, bool &valid)
unsigned long long vtkVariantExtract< unsigned long long >(const vtkVariant &value, bool &valid)
unsigned long vtkVariantExtract< unsigned long >(const vtkVariant &value, bool &valid)
int vtkVariantExtract< int >(const vtkVariant &value, bool &valid)
T vtkVariantExtract(const vtkVariant &value, bool &valid)
unsigned char vtkVariantExtract< unsigned char >(const vtkVariant &value, bool &valid)
vtkStdString vtkVariantExtract< vtkStdString >(const vtkVariant &value, bool &valid)
long vtkVariantExtract< long >(const vtkVariant &value, bool &valid)
float vtkVariantExtract< float >(const vtkVariant &value, bool &valid)
short vtkVariantExtract< short >(const vtkVariant &value, bool &valid)
unsigned short vtkVariantExtract< unsigned short >(const vtkVariant &value, bool &valid)
char vtkVariantExtract< char >(const vtkVariant &value, bool &valid)
unsigned int vtkVariantExtract< unsigned int >(const vtkVariant &value, bool &valid)