mirror of https://github.com/bsnes-emu/bsnes.git
35 lines
1.0 KiB
C++
35 lines
1.0 KiB
C++
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#ifndef NALL_CONCEPT_HPP
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#define NALL_CONCEPT_HPP
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#include <nall/static.hpp>
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#include <nall/utility.hpp>
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namespace nall {
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//unsigned count() const;
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template<typename T> struct has_count { enum { value = false }; };
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//unsigned length() const;
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template<typename T> struct has_length { enum { value = false }; };
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//unsigned size() const;
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template<typename T> struct has_size { enum { value = false }; };
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template<typename T> unsigned container_size(const T& object, typename mp_enable_if<has_count<T>>::type = 0) {
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return object.count();
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}
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template<typename T> unsigned container_size(const T& object, typename mp_enable_if<has_length<T>>::type = 0) {
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return object.length();
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}
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template<typename T> unsigned container_size(const T& object, typename mp_enable_if<has_size<T>>::type = 0) {
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return object.size();
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}
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template<typename T> unsigned container_size(const T& object, typename mp_enable_if<std::is_array<T>>::type = 0) {
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return sizeof(T) / sizeof(typename std::remove_extent<T>::type);
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}
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}
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#endif
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