error: ',' expected (got "self")

[Dracks]

Describe the bug

Runing the tests of one of my libraries, I've got the C error:

================== C compilation error (from tcc): ==============
cc: /tmp/v_1000/tsession_7f67a12af740_01JNVWNVSBV9CADK9FQ6GVNC57/class_transformer_test.01JNVWNWHE7Y2G4EXH61NRRFYC.tmp.c:2563: error: ',' expected (got "self")
=================================================================

Reproduction Steps

Run the tests of: https://github.com/Dracks/vlang-validator-form

Expected Behavior

The tests run

Current Behavior

It throws a C error. You can see it in the pipeline output:
https://github.com/Dracks/vlang-validator-form/actions/runs/13741867512/job/38432091608?pr=1

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.9 44f8ba6

Environment details (OS name and version, etc.)

Linux

Note

You can use the 👍 reaction to increase the issue's priority for developers.

Please note that only the 👍 reaction to the issue itself counts as a vote.
Other reactions and those to comments will not be taken into account.

[huly-for-github]

Connected to Huly®: V_0.6-22289

[Dracks]

Hello, I found a smaller version of the code that reproduce the problem:

pub struct ValueWithErrors[T, E] {
pub:
	value  T
	errors E
}

@[inline]
pub fn (self ValueWithErrors[T, E]) has_errors() bool {
	return self.errors.len > 0
}



pub fn transform_and_validate[T](data map[string]string) ValueWithErrors[T, map[string][]IError] {
	mut new_object := T{}
	mut errors := map[string][]IError{}
	return ValueWithErrors[T, map[string][]IError]{
		errors: errors
		value:  new_object
	}
}

struct BasicStruct {
	str    string @[max_length: 15; min_length: 3; req]
	number int    @[max: 100; min: 3; req]
	b      bool   @[req]
}

data_with_errors := transform_and_validate[BasicStruct]({
	'str':    '1234567890123456'
	'number': '11'
})

assert data_with_errors.errors.len > 0

[Dracks]

FYI: I did some tests, and seems the problem appears from the function transform_and_validate, when I do manually the creation of the object, everything seems to be fine, in fact, I found some kind of workarround to make the issue dissapear, from the following code, see the commented lines:

struct BasicStruct {
	str    string @[max_length: 15; min_length: 3; req]
	number int    @[max: 100; min: 3; req]
	b      bool   @[req]
}

pub struct ValueWithErrors[T, E] {
pub:
	value  T
	errors E
}

@[inline]
pub fn (self ValueWithErrors[T, E]) has_errors() bool {
	return self.errors.len > 0
}

pub fn transform_and_validate[T]() ValueWithErrors[T, map[string][]IError] {
	mut new_object := T{}
	mut errors := map[string][]IError{}
	return ValueWithErrors[T, map[string][]IError]{
		errors: errors
		value:  new_object
	}
}

/*
// Uncomment this to make the issue dissapear
mut new_object := BasicStruct{}
mut errors := map[string][]IError{}
data_with_errors := ValueWithErrors[BasicStruct, map[string][]IError]{
		errors: errors
		value:  new_object
	}
*/
data_with_errors2 := transform_and_validate[BasicStruct]()
assert data_with_errors2.errors.len > 0