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+// Copyright 2020 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef SRC_AST_IDENTIFIER_EXPRESSION_H_
+#define SRC_AST_IDENTIFIER_EXPRESSION_H_
+
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "src/ast/expression.h"
+
+namespace tint {
+namespace ast {
+
+/// An identifier expression
+class IdentifierExpression : public Expression {
+ public:
+ /// Constructor
+ /// @param name the name
+ explicit IdentifierExpression(const std::string& name);
+ /// Constructor
+ /// @param source the source
+ /// @param name the name
+ IdentifierExpression(const Source& source, const std::string& name);
+ /// Constructor
+ /// @param name the name
+ explicit IdentifierExpression(std::vector<std::string> name);
+ /// Constructor
+ /// @param source the initializer source
+ /// @param name the name
+ IdentifierExpression(const Source& source, std::vector<std::string> name);
+ /// Move constructor
+ IdentifierExpression(IdentifierExpression&&) = default;
+ ~IdentifierExpression() override;
+
+ /// Sets the name
+ /// @param name the name
+ void set_name(std::vector<std::string> name) { name_ = std::move(name); }
+ /// @returns the name
+ std::vector<std::string> name() const { return name_; }
+
+ /// @returns true if this is an identifier expression
+ bool IsIdentifier() const override { return true; }
+
+ /// @returns true if the node is valid
+ bool IsValid() const override;
+
+ /// Writes a representation of the node to the output stream
+ /// @param out the stream to write to
+ /// @param indent number of spaces to indent the node when writing
+ void to_str(std::ostream& out, size_t indent) const override;
+
+ private:
+ IdentifierExpression(const IdentifierExpression&) = delete;
+
+ std::vector<std::string> name_;
+};
+
+} // namespace ast
+} // namespace tint
+
+#endif // SRC_AST_IDENTIFIER_EXPRESSION_H_
