Initial commit

1 files changed, 37 insertions, 0 deletions

diff --git a/src/log_level.rs b/src/log_level.rs
new file mode 100644
index 0000000..6c84cb0
--- /dev/null
+++ b/src/log_level.rs
@@ -0,0 +1,37 @@
+
+use std::cmp::Ordering;
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum LogLevel {
+    /// Verbose record of decisions and operations.
+    Info,
+    /// Report recoverable issues.
+    Warn,
+    /// Report unrecoverable errors and quit.
+    Error,
+}
+
+impl PartialOrd for LogLevel {
+    fn partial_cmp(&self, other: &LogLevel) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Ord for LogLevel {
+    fn cmp(&self, other: &LogLevel) -> Ordering {
+        use LogLevel::*;
+        match (self, other) {
+            (Info , Info ) => Ordering::Equal,
+            (Info , Warn ) => Ordering::Less,
+            (Info , Error) => Ordering::Less,
+
+            (Warn , Info ) => Ordering::Greater,
+            (Warn , Warn ) => Ordering::Equal,
+            (Warn , Error) => Ordering::Less,
+
+            (Error , Info ) => Ordering::Greater,
+            (Error , Warn ) => Ordering::Greater,
+            (Error , Error) => Ordering::Equal,
+        }
+    }
+}