lsst.afw  20.0.0-9-g61a2a9a3d+14f89e4eca
type_traits.h
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1 // -*- LSST-C++ -*-
2 /*
3  * This file is part of afw.
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7  * (https://www.lsst.org).
8  * See the COPYRIGHT file at the top-level directory of this distribution
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24 
25 #ifndef LSST_AFW_TYPEHANDLING_DETAIL_TYPETRAITS_H
26 #define LSST_AFW_TYPEHANDLING_DETAIL_TYPETRAITS_H
27 
28 #include <type_traits>
29 
30 namespace lsst {
31 namespace afw {
32 namespace typehandling {
33 namespace detail {
34 
35 // Test for smart pointers as "any type with an element_type member"
36 // Second template parameter is a dummy to let us do some metaprogramming
37 template <typename, typename = void>
38 constexpr bool IS_SMART_PTR = false;
39 template <typename T>
40 constexpr bool IS_SMART_PTR<T, std::enable_if_t<std::is_object<typename T::element_type>::value>> = true;
41 
42 } // namespace detail
43 } // namespace typehandling
44 } // namespace afw
45 } // namespace lsst
46 
47 #endif
lsst::afw::typehandling::detail::IS_SMART_PTR
constexpr bool IS_SMART_PTR
Definition: type_traits.h:38
lsst
A base class for image defects.