Initial Commit

cpepetest1/demo_error.hpp

@@ -0,0 +1,35 @@
+// examples/demo_error.hpp                                            -*-C++-*-
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+#ifndef INCLUDED_EXAMPLES_DEMO_ERROR
+#define INCLUDED_EXAMPLES_DEMO_ERROR
+
+#include <string>
+#include <system_error>
+
+// ----------------------------------------------------------------------------
+
+namespace demo
+{
+    inline constexpr int timeout{1};
+
+    inline auto category() -> std::error_category const&
+    {
+        struct category
+            : std::error_category
+        {
+            auto name() const noexcept -> char const* override {
+                return "demo-category";
+            }
+            auto message(int c) const noexcept -> std::string override {
+                return c == 1? "timeout": "unknown";
+            }
+        };
+        static category rc{};
+        return rc;
+    }
+}
+
+// ----------------------------------------------------------------------------
+
+#endif