// Copyright 2020 The Dawn & Tint Authors // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are met: // // 1. Redistributions of source code must retain the above copyright notice, this // list of conditions and the following disclaimer. // // 2. Redistributions in binary form must reproduce the above copyright notice, // this list of conditions and the following disclaimer in the documentation // and/or other materials provided with the distribution. // // 3. Neither the name of the copyright holder nor the names of its // contributors may be used to endorse or promote products derived from // this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #ifndef SRC_DAWN_COMMON_ITYP_SPAN_H_ #define SRC_DAWN_COMMON_ITYP_SPAN_H_ #include <type_traits> #include "dawn/common/TypedInteger.h" #include "dawn/common/UnderlyingType.h" namespace dawn::ityp { // ityp::span is a helper class that wraps an unowned packed array of type |Value|. // It stores the size and pointer to first element. It has the restriction that // indices must be a particular type |Index|. This provides a type-safe way to index // raw pointers. template <typename Index, typename Value> class span { … }; // ityp::SpanFromUntyped<Index>(myValues, myValueCount) creates a span<Index, Value> from a C-style // span that's without a TypedInteger index. It is useful at the interface between code that doesn't // use ityp and code that does. template <typename Index, typename Value> span<Index, Value> SpanFromUntyped(Value* data, size_t size) { … } } // namespace dawn::ityp #endif // SRC_DAWN_COMMON_ITYP_SPAN_H_