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Keep track of the earliest evaluation point for an expression. Required to properly track what can be assigned to a `const`, `override`, `let`, `var`. Bug: tint:1601 Bug: chromium:1343242 Change-Id: I301eec21b71e9036dc1bf6c9af8079317d724762 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/95949 Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Antonio Maiorano <amaiorano@google.com> Commit-Queue: Ben Clayton <bclayton@google.com>
69 lines
2.6 KiB
C++
69 lines
2.6 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_INDEX_ACCESSOR_EXPRESSION_H_
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#define SRC_TINT_SEM_INDEX_ACCESSOR_EXPRESSION_H_
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#include <vector>
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#include "src/tint/sem/expression.h"
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// Forward declarations
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namespace tint::ast {
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class IndexAccessorExpression;
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} // namespace tint::ast
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namespace tint::sem {
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/// IndexAccessorExpression holds the semantic information for a ast::IndexAccessorExpression node.
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class IndexAccessorExpression final : public Castable<IndexAccessorExpression, Expression> {
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public:
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/// Constructor
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/// @param declaration the AST node
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/// @param type the resolved type of the expression
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/// @param stage the earliest evaluation stage for the expression
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/// @param object the object expression that is being indexed
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/// @param index the index expression
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/// @param statement the statement that owns this expression
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/// @param constant the constant value of the expression. May be null
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/// @param has_side_effects whether this expression may have side effects
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/// @param source_var the (optional) source variable for this expression
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IndexAccessorExpression(const ast::IndexAccessorExpression* declaration,
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const sem::Type* type,
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EvaluationStage stage,
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const Expression* object,
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const Expression* index,
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const Statement* statement,
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const Constant* constant,
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bool has_side_effects,
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const Variable* source_var = nullptr);
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/// Destructor
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~IndexAccessorExpression() override;
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/// @returns the object expression that is being indexed
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Expression const* Object() const { return object_; }
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/// @returns the index expression
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Expression const* Index() const { return index_; }
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private:
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Expression const* const object_;
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Expression const* const index_;
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};
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} // namespace tint::sem
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#endif // SRC_TINT_SEM_INDEX_ACCESSOR_EXPRESSION_H_
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