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83 lines
2.1 KiB
83 lines
2.1 KiB
/*
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* const_templates.h
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*
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* Created on: 11.10.2012
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* Author: Thomas Heinemann
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*/
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#ifndef CONST_TEMPLATES_H_
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#define CONST_TEMPLATES_H_
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namespace mrmc {
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namespace misc {
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/*!
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* Returns a constant value of 0 that is fit to the type it is being written to.
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* As (at least) gcc has problems to use the correct template by the return value
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* only, the function gets a pointer as a parameter to infer the return type.
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*
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* <b>Parameter</b>
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*
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* The parameter is a pointer which is used to infer the return type (So, if you want
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* the return value to be of type double, the parameter has to be of type double*).
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* In most cases, it is a good choice to use the address of the variable that is to be
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* set.
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*/
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template<typename _Scalar>
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static inline _Scalar constGetZero(_Scalar*) {
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return _Scalar(0);
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}
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/*! @cond TEMPLATE_SPECIALIZATION
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* (exclude the specializations from the documentation) */
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template <>
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inline int_fast32_t constGetZero(int_fast32_t*) {
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return 0;
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}
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/*! @internal
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* Specialization of constGetZero for int_fast32_t
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*/
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template <>
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inline double constGetZero(double*) {
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return 0.0;
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}
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/*! @endcond */
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/*!
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* Returns a constant value of 0 that is fit to the type it is being written to.
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* As (at least) gcc has problems to use the correct template by the return value
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* only, the function gets a pointer as a parameter to infer the return type.
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*
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* <b>Parameter</b>
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*
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* The parameter is a pointer which is used to infer the return type (So, if you want
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* the return value to be of type double, the parameter has to be of type double*).
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* In most cases, it is a good choice to use the address of the variable that is to be
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* set.
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*/
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template<typename _Scalar>
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static inline _Scalar constGetOne(_Scalar*) {
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return _Scalar(1);
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}
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/*! @cond TEMPLATE_SPECIALIZATION
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* (exclude the specializations from the documentation) */
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template<>
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inline int_fast32_t constGetOne(int_fast32_t*) {
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return 1;
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}
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template<>
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inline double constGetOne(double*) {
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return 1.0;
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}
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/*! @endcond */
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} //namespace misc
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} //namespace mrmc
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#endif /* CONST_TEMPLATES_H_ */
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