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5cd71b8c0a
* Rename namespace semantic to sem * Rename directory src/semantic/ to src/sem/ Bug: tint:724 Change-Id: I76383b821fbca7f1037a803c497b595a706dcb06 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/48120 Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Antonio Maiorano <amaiorano@google.com> Reviewed-by: Ben Clayton <bclayton@google.com>
102 lines
3.0 KiB
C++
102 lines
3.0 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_SEM_VARIABLE_H_
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#define SRC_SEM_VARIABLE_H_
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#include <vector>
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#include "src/ast/storage_class.h"
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#include "src/sem/expression.h"
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namespace tint {
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// Forward declarations
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namespace ast {
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class IdentifierExpression;
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class Variable;
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} // namespace ast
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namespace type {
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class Type;
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} // namespace type
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namespace sem {
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class VariableUser;
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/// Variable holds the semantic information for variables.
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class Variable : public Castable<Variable, Node> {
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public:
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/// Constructor
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/// @param declaration the AST declaration node
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/// @param type the variable type
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/// @param storage_class the variable storage class
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Variable(const ast::Variable* declaration,
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type::Type* type,
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ast::StorageClass storage_class);
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/// Destructor
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~Variable() override;
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/// @returns the AST declaration node
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const ast::Variable* Declaration() const { return declaration_; }
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/// @returns the canonical type for the variable
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type::Type* Type() const { return type_; }
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/// @returns the AST node's type. May be nullptr.
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type::Type* DeclaredType() const;
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/// @returns the storage class for the variable
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ast::StorageClass StorageClass() const { return storage_class_; }
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/// @returns the expressions that use the variable
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const std::vector<const VariableUser*>& Users() const { return users_; }
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/// @param user the user to add
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void AddUser(const VariableUser* user) { users_.emplace_back(user); }
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private:
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const ast::Variable* const declaration_;
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type::Type* const type_;
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ast::StorageClass const storage_class_;
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std::vector<const VariableUser*> users_;
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};
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/// VariableUser holds the semantic information for an identifier expression
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/// node that resolves to a variable.
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class VariableUser : public Castable<VariableUser, Expression> {
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public:
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/// Constructor
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/// @param declaration the AST identifier node
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/// @param type the resolved type of the expression
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/// @param statement the statement that owns this expression
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/// @param variable the semantic variable
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VariableUser(ast::IdentifierExpression* declaration,
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type::Type* type,
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Statement* statement,
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sem::Variable* variable);
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/// @returns the variable that this expression refers to
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const sem::Variable* Variable() const { return variable_; }
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private:
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sem::Variable const* const variable_;
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};
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} // namespace sem
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} // namespace tint
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#endif // SRC_SEM_VARIABLE_H_
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