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83bd738ab4
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>
53 lines
1.7 KiB
C++
53 lines
1.7 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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#include "src/tint/sem/expression.h"
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#include <utility>
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#include "src/tint/sem/materialize.h"
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TINT_INSTANTIATE_TYPEINFO(tint::sem::Expression);
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namespace tint::sem {
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Expression::Expression(const ast::Expression* declaration,
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const sem::Type* type,
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EvaluationStage stage,
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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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: declaration_(declaration),
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source_variable_(source_var),
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type_(type),
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stage_(stage),
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statement_(statement),
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constant_(std::move(constant)),
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has_side_effects_(has_side_effects) {
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TINT_ASSERT(Semantic, type_);
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TINT_ASSERT(Semantic, (constant != nullptr) == (stage == EvaluationStage::kConstant));
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}
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Expression::~Expression() = default;
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const Expression* Expression::UnwrapMaterialize() const {
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if (auto* m = As<Materialize>()) {
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return m->Expr();
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}
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return this;
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}
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} // namespace tint::sem
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