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8648120bbe
And remove a whole load of const_cast hackery. Semantic nodes may contain internally mutable fields (although only ever modified during resolving), so these are always passed by `const` pointer. While all AST nodes are internally immutable, we have decided that pointers to AST nodes should also be marked `const`, for consistency. There's still a collection of const_cast calls in the Resolver. These will be fixed up in a later change. Bug: tint:745 Change-Id: I046309b8e586772605fc0fe6b2d27f28806d40ef Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/66606 Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Ben Clayton <bclayton@chromium.org> Reviewed-by: David Neto <dneto@google.com>
114 lines
3.7 KiB
C++
114 lines
3.7 KiB
C++
// Copyright 2021 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_SEM_ARRAY_H_
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#define SRC_SEM_ARRAY_H_
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#include <stdint.h>
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#include <string>
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#include "src/sem/node.h"
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#include "src/sem/type.h"
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// Forward declarations
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namespace tint {
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namespace ast {
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class Array;
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} // namespace ast
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} // namespace tint
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namespace tint {
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namespace sem {
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/// Array holds the semantic information for Array nodes.
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class Array : public Castable<Array, Type> {
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public:
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/// Constructor
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/// @param element the array element type
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/// @param count the number of elements in the array. 0 represents a
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/// runtime-sized array.
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/// @param align the byte alignment of the array
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/// @param size the byte size of the array
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/// @param stride the number of bytes from the start of one element of the
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/// array to the start of the next element
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/// @param implicit_stride the number of bytes from the start of one element
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/// of the array to the start of the next element, if there was no [[stride]]
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/// decoration applied.
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Array(Type const* element,
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uint32_t count,
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uint32_t align,
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uint32_t size,
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uint32_t stride,
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uint32_t implicit_stride);
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/// @return the array element type
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Type const* ElemType() const { return element_; }
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/// @returns the number of elements in the array. 0 represents a runtime-sized
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/// array.
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uint32_t Count() const { return count_; }
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/// @returns the byte alignment of the array
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/// @note this may differ from the alignment of a structure member of this
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/// array type, if the member is annotated with the `[[align(n)]]` decoration.
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uint32_t Align() const override;
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/// @returns the byte size of the array
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/// @note this may differ from the size of a structure member of this array
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/// type, if the member is annotated with the `[[size(n)]]` decoration.
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uint32_t Size() const override;
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/// @returns the number of bytes from the start of one element of the
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/// array to the start of the next element
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uint32_t Stride() const { return stride_; }
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/// @returns the number of bytes from the start of one element of the
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/// array to the start of the next element, if there was no [[stride]]
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/// decoration applied
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uint32_t ImplicitStride() const { return implicit_stride_; }
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/// @returns true if the value returned by Stride() matches the element's
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/// natural stride
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bool IsStrideImplicit() const { return stride_ == implicit_stride_; }
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/// @returns true if this array is runtime sized
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bool IsRuntimeSized() const { return count_ == 0; }
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/// @returns true if constructible as per
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/// https://gpuweb.github.io/gpuweb/wgsl/#constructible-types
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bool IsConstructible() const override;
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/// @returns the name for the type
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std::string type_name() const override;
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/// @param symbols the program's symbol table
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/// @returns the name for this type that closely resembles how it would be
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/// declared in WGSL.
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std::string FriendlyName(const SymbolTable& symbols) const override;
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private:
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Type const* const element_;
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const uint32_t count_;
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const uint32_t align_;
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const uint32_t size_;
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const uint32_t stride_;
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const uint32_t implicit_stride_;
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const bool constructible_;
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};
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} // namespace sem
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} // namespace tint
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#endif // SRC_SEM_ARRAY_H_
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