Add error::canceled.

Author: evoskuil

include/bitcoin/database/error.hpp

@@ -35,7 +35,10 @@ enum error_t : uint8_t
 {
     /// general
     success,
+    canceled,
     unknown_state,
+
+    /// integrity (internal fault)
     integrity,
     integrity1,
     integrity2,

src/error.cpp

@@ -28,7 +28,10 @@ DEFINE_ERROR_T_MESSAGE_MAP(error)
 {
     // general
     { success, "success" },
+    { canceled, "canceled" },
     { unknown_state, "unknown state" },
+
+    // integrity (internal fault)
     { integrity, "store corrupted" },
     { integrity1, "store corrupted1" },
     { integrity2, "store corrupted2" },

test/error.cpp

@@ -32,6 +32,15 @@ BOOST_AUTO_TEST_CASE(error_t__code__success__false_exected_message)
     BOOST_REQUIRE_EQUAL(ec.message(), "success");
 }
 
+BOOST_AUTO_TEST_CASE(error_t__code__canceled__true_exected_message)
+{
+    constexpr auto value = error::canceled;
+    const auto ec = code(value);
+    BOOST_REQUIRE(ec);
+    BOOST_REQUIRE(ec == value);
+    BOOST_REQUIRE_EQUAL(ec.message(), "canceled");
+}
+
 BOOST_AUTO_TEST_CASE(error_t__code__unknown_state__true_exected_message)
 {
     constexpr auto value = error::unknown_state;