1 files changed, 32 insertions, 0 deletions
diff --git a/src/x/error.h b/src/x/error.h
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--- /dev/null
+++ b/src/x/error.h
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+// Copyright 2021 Benjamin Barenblat
+//
+// 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
+//
+//     https://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 GLPLANET_SRC_X_ERROR_H_
+#define GLPLANET_SRC_X_ERROR_H_
+
+#include <stdint.h>
+
+#include <stdexcept>
+
+namespace x {
+
+// An X protocol error.
+class Error final : public std::runtime_error {
+ public:
+  explicit Error(uint8_t code) noexcept;
+};
+
+}  // namespace x
+
+#endif  // GLPLANET_SRC_X_ERROR_H_