Initial commit
diff --git a/src/ast/unary_derivative_expression.cc b/src/ast/unary_derivative_expression.cc
new file mode 100644
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+++ b/src/ast/unary_derivative_expression.cc
@@ -0,0 +1,52 @@
+// 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.
+
+#include "src/ast/unary_derivative_expression.h"
+
+namespace tint {
+namespace ast {
+
+UnaryDerivativeExpression::UnaryDerivativeExpression(
+ UnaryDerivative op,
+ DerivativeModifier mod,
+ std::unique_ptr<Expression> param)
+ : Expression(), op_(op), modifier_(mod), param_(std::move(param)) {}
+
+UnaryDerivativeExpression::UnaryDerivativeExpression(
+ const Source& source,
+ UnaryDerivative op,
+ DerivativeModifier mod,
+ std::unique_ptr<Expression> param)
+ : Expression(source), op_(op), modifier_(mod), param_(std::move(param)) {}
+
+UnaryDerivativeExpression::~UnaryDerivativeExpression() = default;
+
+bool UnaryDerivativeExpression::IsValid() const {
+ return true;
+}
+
+void UnaryDerivativeExpression::to_str(std::ostream& out, size_t indent) const {
+ make_indent(out, indent);
+ out << "UnaryDerivative{" << std::endl;
+ make_indent(out, indent + 2);
+ out << op_ << std::endl;
+ make_indent(out, indent + 2);
+ out << modifier_ << std::endl;
+ param_->to_str(out, indent);
+ make_indent(out, indent);
+ out << "}";
+}
+
+} // namespace ast
+} // namespace tint
