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diff --git a/src/ast/call_expression.h b/src/ast/call_expression.h
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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_CALL_EXPRESSION_H_
+#define SRC_AST_CALL_EXPRESSION_H_
+
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "src/ast/expression.h"
+#include "src/ast/literal.h"
+
+namespace tint {
+namespace ast {
+
+/// A call expression
+class CallExpression : public Expression {
+ public:
+ /// Constructor
+ /// @param func the function
+ /// @param params the parameters
+ CallExpression(std::unique_ptr<Expression> func,
+ std::vector<std::unique_ptr<Expression>> params);
+ /// Constructor
+ /// @param source the initializer source
+ /// @param func the function
+ /// @param params the parameters
+ CallExpression(const Source& source,
+ std::unique_ptr<Expression> func,
+ std::vector<std::unique_ptr<Expression>> params);
+ /// Move constructor
+ CallExpression(CallExpression&&) = default;
+ ~CallExpression() override;
+
+ /// Sets the func
+ /// @param func the func
+ void set_func(std::unique_ptr<Expression> func) { func_ = std::move(func); }
+ /// @returns the func
+ Expression* func() const { return func_.get(); }
+
+ /// Sets the parameters
+ /// @param params the parameters
+ void set_params(std::vector<std::unique_ptr<Expression>> params) {
+ params_ = std::move(params);
+ }
+ /// @returns the parameters
+ const std::vector<std::unique_ptr<Expression>>& params() const {
+ return params_;
+ }
+
+ /// @returns true if this is a call expression
+ bool IsCall() 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:
+ CallExpression(const CallExpression&) = delete;
+
+ std::unique_ptr<Expression> func_;
+ std::vector<std::unique_ptr<Expression>> params_;
+};
+
+} // namespace ast
+} // namespace tint
+
+#endif // SRC_AST_CALL_EXPRESSION_H_
