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38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
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// Copyright (c) 2022 The Chromium Embedded Framework Authors. All rights
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// reserved. Use of this source code is governed by a BSD-style license that
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// can be found in the LICENSE file.
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#ifndef CEF_LIBCEF_DLL_TEMPLATE_UTIL_H_
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#define CEF_LIBCEF_DLL_TEMPLATE_UTIL_H_
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#pragma once
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#include <type_traits>
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namespace template_util {
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// Used to detect whether the given C struct has a size_t size field or has a
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// base field and a base field has a size field.
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template <typename T, typename = void>
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struct HasValidSize {
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bool operator()(const T*) { return true; }
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};
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template <typename T>
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struct HasValidSize<
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T,
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typename std::enable_if_t<std::is_same<decltype(T::size), size_t>::value>> {
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bool operator()(const T* s) { return s->size == sizeof(*s); }
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};
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template <typename T>
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struct HasValidSize<T, decltype(void(T::base.size))> {
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bool operator()(const T* s) { return s->base.size == sizeof(*s); }
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};
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template <typename T>
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inline bool has_valid_size(const T* s) {
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return HasValidSize<T>()(s);
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}
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} // namespace template_util
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#endif // CEF_LIBCEF_DLL_TEMPLATE_UTIL_H_
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