Like niceTypeName to its own file of utils

src/args/utils.zig

@@ -0,0 +1,24 @@
+const std = @import("std");
+
+pub fn niceTypeName(comptime T: type) []const u8 {
+    if (T == []const u8) {
+        return "string";
+    }
+
+    const name = @typeName(T);
+
+    if (std.mem.startsWith(u8, name, "array_list.ArrayListAligned")) {
+        return "array";
+    }
+
+    return name;
+}
+
+const t = std.testing;
+
+test "nice type names" {
+    try t.expectEqualStrings("string", niceTypeName([]const u8));
+    try t.expectEqualStrings("array", niceTypeName(std.ArrayList(u8)));
+
+    try t.expectEqualStrings("u8", niceTypeName(u8));
+}