Improve niceTypeName, and also swap a warn to an err

src/args/parsers/enumLiteral.zig

@@ -38,7 +38,7 @@ fn parseEnumFromStr(comptime T: type, str: []const u8) !T {
         // todo: maybe find a way to get Zig tests to run without stderr *unless* they fail?
     }
 
-    log.warn("could not parse `{s}` as enum `{s}`", .{ str, @typeName(T) });
+    log.err("could not parse `{s}` as enum `{s}`", .{ str, @typeName(T) });
     log.warn("hint: try one of the following:", .{});
 
     inline for (info.Enum.fields) |field| {

src/args/utils.zig

@@ -11,14 +11,24 @@ pub fn niceTypeName(comptime T: type) []const u8 {
         return "array";
     }
 
+    if (std.mem.lastIndexOf(u8, name, ".")) |idx| {
+        return name[idx + 1 ..];
+    }
+
     return name;
 }
 
 const t = std.testing;
 
 test "nice type names" {
+    const Enum = enum(u8) {
+        ThisIs,
+        ATest,
+    };
+
     try t.expectEqualStrings("string", niceTypeName([]const u8));
     try t.expectEqualStrings("array", niceTypeName(std.ArrayList(u8)));
+    try t.expectEqualStrings("Enum", niceTypeName(Enum));
 
     try t.expectEqualStrings("u8", niceTypeName(u8));
 }