1 files changed, 34 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/syntax/UnaryOperator.java b/src/main/java/com/google/devtools/build/lib/syntax/UnaryOperator.java
new file mode 100644
index 0000000000..85fe9217c9
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/syntax/UnaryOperator.java
@@ -0,0 +1,34 @@
+// Copyright 2017 The Bazel Authors. All rights reserved.
+//
+// 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.
+
+package com.google.devtools.build.lib.syntax;
+
+/** Unary operators. */
+public enum UnaryOperator {
+
+  // Include trailing whitespace in name for non-symbolic operators (for pretty printing).
+  NOT("not "),
+  MINUS("-");
+
+  private final String name;
+
+  UnaryOperator(String name) {
+    this.name = name;
+  }
+
+  @Override
+  public String toString() {
+    return name;
+  }
+}