48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
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/**
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* @file types.h
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* @brief Typedefs for easier changing of types
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* @author Richard Roberts
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* @created Aug 21, 2010
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*/
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#pragma once
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#include <unistd.h>
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namespace gtsam {
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typedef size_t varid_t;
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/** Helper class that uses templates to select between two types based on
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* whether TEST_TYPE is const or not.
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*/
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template<typename TEST_TYPE, typename BASIC_TYPE, typename AS_NON_CONST, typename AS_CONST>
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struct const_selector {};
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/** Specialization for the non-const version */
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template<typename BASIC_TYPE, typename AS_NON_CONST, typename AS_CONST>
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struct const_selector<BASIC_TYPE, BASIC_TYPE, AS_NON_CONST, AS_CONST> {
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typedef AS_NON_CONST type;
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};
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/** Specialization for the const version */
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template<typename BASIC_TYPE, typename AS_NON_CONST, typename AS_CONST>
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struct const_selector<const BASIC_TYPE, BASIC_TYPE, AS_NON_CONST, AS_CONST> {
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typedef AS_CONST type;
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};
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/**
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* Helper struct that encapsulates a value with a default, this is just used
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* as a member object so you don't have to specify defaults in the class
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* constructor.
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*/
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template<typename T, T defaultValue>
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struct ValueWithDefault {
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T value;
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ValueWithDefault() : value(defaultValue) {}
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ValueWithDefault(const T& _value) : value(_value) {}
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T& operator*() { return value; }
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};
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}
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