Checker: wrong cast on methods mutable params

[enghitalo]

Describe the bug

I think it is a method problem already the the follow code works.

module main

struct Struct {
	a string
	b int
}

struct Decoder {}

pub fn decode[T](src []u8) !T {
	mut val := T{}

	mut d := Decoder{}

	decode_[T](src, mut val)!

	return val
}

pub fn decode_[T](data []u8, mut val T) ! {
	$if T is $struct {
		mut keys := ['a', 'b']
		for mut key in keys {

			decode_(data, mut key)!

			$for field in T.fields {

				if field.name == key {
					mut value := val.$(field.name)
					// println(val.$(field.name))
					// decode_(data, mut val.$(field.name))!
					decode_(data, mut value)!
					val.$(field.name) = value
				}
			}
		}
	}
}

de := decode[Struct]([])!
println(de)

Reproduction Steps

module main

struct Struct {
    a string
    b int
}

struct Decoder {}

pub fn decode[T](src []u8) !T {
    mut val := T{}

    mut d := Decoder{}

    d.decode[T](src, mut val)!

    return val
}

pub fn (mut d Decoder) decode[T](data []u8, mut val T) ! {
    $if T is $struct {
        mut keys := ['a', 'b']
        for mut key in keys {

            d.decode(data, mut key)!

            $for field in T.fields {

                if field.name == key {
                    mut value := val.$(field.name)
                    // println(val.$(field.name))
                    // d.decode(data, mut val.$(field.name))!
                    d.decode(data, mut value)!
                    val.$(field.name) = value
                }
            }
        }
    }
}

de := decode[Struct]([])!
println(de)

Expected Behavior

Struct{
a: ''
b: 0
}

Current Behavior

discardable.v:33:25: error: cannot use `int` as `&string` in argument 2 to `Decoder.decode`
   31 |                     // println(val.$(field.name))
   32 |                     // d.decode(data, mut val.$(field.name))!
   33 |                     d.decode(data, mut value)!
      |                                        ~~~~~
   34 |                     val.$(field.name) = value
   35 |                 }

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.3 782bf86

Environment details (OS name and version, etc.)

Linux Ubuntu

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[shove70]

This should be able to be closed, @felipensp has solved it.

[felipensp]

This should be able to be closed, @felipensp has solved it.

I've solved the mut value part, but the comptimeselector part needs a fix.