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5f764d8527
This CL moves sem/type and copies sem/node into the type/ folder. The type subclasses are moved over to using type::Type while remaining in the sem:: namespace. They will be moved over in followup CLs. Bug: tint:1718 Change-Id: I3f3495328d734f88e4fc2dfbc6705343f1198dc5 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/113180 Reviewed-by: Ben Clayton <bclayton@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
// Copyright 2022 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_TINT_SEM_ARRAY_COUNT_H_
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#define SRC_TINT_SEM_ARRAY_COUNT_H_
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#include "src/tint/sem/expression.h"
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#include "src/tint/sem/variable.h"
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#include "src/tint/type/array_count.h"
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namespace tint::sem {
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/// The variant of an ArrayCount when the count is a named override variable.
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/// Example:
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/// ```
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/// override N : i32;
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/// type arr = array<i32, N>
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/// ```
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class NamedOverrideArrayCount final : public Castable<NamedOverrideArrayCount, type::ArrayCount> {
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public:
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/// Constructor
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/// @param var the `override` variable
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explicit NamedOverrideArrayCount(const GlobalVariable* var);
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~NamedOverrideArrayCount() override;
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/// @returns a hash of the array count.
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size_t Hash() const override;
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/// @param t other array count
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/// @returns true if this array count is equal to the given array count
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bool Equals(const type::ArrayCount& t) const override;
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/// The `override` variable.
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const GlobalVariable* variable;
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};
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/// The variant of an ArrayCount when the count is an unnamed override variable.
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/// Example:
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/// ```
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/// override N : i32;
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/// type arr = array<i32, N*2>
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/// ```
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class UnnamedOverrideArrayCount final
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: public Castable<UnnamedOverrideArrayCount, type::ArrayCount> {
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public:
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/// Constructor
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/// @param e the override expression
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explicit UnnamedOverrideArrayCount(const Expression* e);
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~UnnamedOverrideArrayCount() override;
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/// @returns a hash of the array count.
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size_t Hash() const override;
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/// @param t other array count
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/// @returns true if this array count is equal to the given array count
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bool Equals(const type::ArrayCount& t) const override;
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/// The unnamed override expression.
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/// Note: Each AST expression gets a unique semantic expression node, so two equivalent AST
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/// expressions will not result in the same `expr` pointer. This property is important to ensure
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/// that two array declarations with equivalent AST expressions do not compare equal.
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/// For example, consider:
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/// ```
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/// override size : u32;
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/// var<workgroup> a : array<f32, size * 2>;
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/// var<workgroup> b : array<f32, size * 2>;
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/// ```
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// The array count for `a` and `b` have equivalent AST expressions, but the types for `a` and
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// `b` must not compare equal.
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const Expression* expr;
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};
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} // namespace tint::sem
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#endif // SRC_TINT_SEM_ARRAY_COUNT_H_
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