Add new trait implementations for Identifier and BaseName

These allow for more convenient printing, as well as storage in map
types.

library/compiler-builtins/libm/crates/libm-test/src/op.rs

@@ -25,14 +25,26 @@ mod shared {
 
 /// An enum representing each possible symbol name (`sin`, `sinf`, `sinl`, etc).
 #[libm_macros::function_enum(BaseName)]
-#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub enum Identifier {}
 
+impl fmt::Display for Identifier {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str(self.as_str())
+    }
+}
+
 /// The name without any type specifier, e.g. `sin` and `sinf` both become `sin`.
 #[libm_macros::base_name_enum]
-#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub enum BaseName {}
 
+impl fmt::Display for BaseName {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str(self.as_str())
+    }
+}
+
 /// Attributes ascribed to a `libm` routine including signature, type information,
 /// and naming.
 pub trait MathOp {