main.v

module main

type Number = any_int | any_float

fn is_gt(val string, dst Number) bool {
	match dst {
		any_int {
			return val.int() > dst
		}
		any_float {
			return val.f64() > dst
		}
	}
}

fn main() {
	rs := is_gt('3', 2)
	println(rs)
}

here's the output:

$ v run main.v
==================
                       ~~~~~~~~~~~~~~~ ^ ~~~
/private/var/folders/4z/zkxqxv9n545dgkx16_d5zhmm0000gn/T/v/main.tmp.c:9414:26: error: invalid operands to binary expression ('f64' (aka 'double') and 'any_float *' (aka 'double *'))
                return string_f64(val) > dst;
                       ~~~~~~~~~~~~~~~ ^ ~~~
/private/var/folders/4z/zkxqxv9n545dgkx16_d5zhmm0000gn/T/v/main.tmp.c:9446:38: warning: integer literal is too large to be represented in a signed integer type, interpreting as unsigned [-Wimplicitly-unsigned-literal]
        _const_math__bits__max_u64 = ((u64)(18446744073709551615));
                                            ^
/private/var/folders/4z/zkxqxv9n545dgkx16_d5zhmm0000gn/T/v/main.tmp.c:9473:409: warning: integer literal is too large to be represented in a signed integer type, interpreting as unsigned [-Wimplicitly-unsigned-literal]
                ((u64)(1)), ((u64)(10)), ((u64)(100)), ((u64)(1000)), ((u64)(10000)), ((u64)(100000)), ((u64)(1000000)), ((u64)(10000000)), ((u64)(100000000)), ((u64)(1000000000)), ((u64)(10000000000)), ((u64)(100000000000)), ((u64)(1000000000000)), ((u64)(10000000000000)), ((u64)(100000000000000)), ((u64)(1000000000000000)), ((u64)(10000000000000000)), ((u64)(100000000000000000)), ((u64)(1000000000000000000)), ((u64)(10000000000000000000))}));
                                                                                                                                                                                                                                                                                                                                                                                                                                      ^
24 warnings and 1 error generated.
...
==================
(Use `v -cg` to print the entire error message)

builder error:
==================
C error. This should never happen.

If you were not working with C interop, please raise an issue on GitHub:

https://github.com/vlang/v/issues/new/choose

You can also use #help on Discord: https://discord.gg/vlang