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f148f0891b
This CL updates the WGSL parser to parse `default` as a case selector value. Bug: tint:1633 Change-Id: I57661d25924e36bec5c03f96399c557fb7bbf760 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/106382 Commit-Queue: Dan Sinclair <dsinclair@chromium.org> Commit-Queue: Ben Clayton <bclayton@google.com> Auto-Submit: Dan Sinclair <dsinclair@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Ben Clayton <bclayton@google.com>
126 lines
4.0 KiB
C++
126 lines
4.0 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_TINT_SEM_SWITCH_STATEMENT_H_
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#define SRC_TINT_SEM_SWITCH_STATEMENT_H_
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#include <vector>
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#include "src/tint/sem/block_statement.h"
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// Forward declarations
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namespace tint::ast {
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class CaseStatement;
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class CaseSelector;
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class SwitchStatement;
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} // namespace tint::ast
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namespace tint::sem {
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class CaseStatement;
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class CaseSelector;
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class Constant;
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class Expression;
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} // namespace tint::sem
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namespace tint::sem {
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/// Holds semantic information about an switch statement
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class SwitchStatement final : public Castable<SwitchStatement, CompoundStatement> {
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public:
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/// Constructor
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/// @param declaration the AST node for this switch statement
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/// @param parent the owning statement
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/// @param function the owning function
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SwitchStatement(const ast::SwitchStatement* declaration,
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const CompoundStatement* parent,
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const sem::Function* function);
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/// Destructor
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~SwitchStatement() override;
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/// @return the AST node for this statement
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const ast::SwitchStatement* Declaration() const;
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/// @returns the case statements for this switch
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std::vector<const CaseStatement*>& Cases() { return cases_; }
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/// @returns the case statements for this switch
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const std::vector<const CaseStatement*>& Cases() const { return cases_; }
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private:
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std::vector<const CaseStatement*> cases_;
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};
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/// Holds semantic information about a switch case statement
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class CaseStatement final : public Castable<CaseStatement, CompoundStatement> {
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public:
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/// Constructor
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/// @param declaration the AST node for this case statement
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/// @param parent the owning statement
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/// @param function the owning function
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CaseStatement(const ast::CaseStatement* declaration,
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const CompoundStatement* parent,
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const sem::Function* function);
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/// Destructor
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~CaseStatement() override;
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/// @return the AST node for this statement
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const ast::CaseStatement* Declaration() const;
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/// @param body the case body block statement
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void SetBlock(const BlockStatement* body) { body_ = body; }
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/// @returns the case body block statement
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const BlockStatement* Body() const { return body_; }
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/// @returns the selectors for the case
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std::vector<const CaseSelector*>& Selectors() { return selectors_; }
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/// @returns the selectors for the case
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const std::vector<const CaseSelector*>& Selectors() const { return selectors_; }
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private:
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const BlockStatement* body_ = nullptr;
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std::vector<const CaseSelector*> selectors_;
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};
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/// Holds semantic information about a switch case selector
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class CaseSelector final : public Castable<CaseSelector, Node> {
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public:
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/// Constructor
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/// @param decl the selector declaration
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/// @param val the case selector value, nullptr for a default selector
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explicit CaseSelector(const ast::CaseSelector* decl, const Constant* val = nullptr);
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/// Destructor
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~CaseSelector() override;
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/// @returns true if this is a default selector
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bool IsDefault() const { return val_ == nullptr; }
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/// @returns the case selector declaration
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const ast::CaseSelector* Declaration() const;
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/// @returns the selector constant value, or nullptr if this is the default selector
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const Constant* Value() const { return val_; }
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private:
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const ast::CaseSelector* const decl_;
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const Constant* const val_;
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};
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} // namespace tint::sem
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#endif // SRC_TINT_SEM_SWITCH_STATEMENT_H_
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