Incorrect warning about default value shows up for enum function parameters

[aaronfranke]

Tested versions

• Reproducible in latest master as of writing 4e5ed0b
• Reproducible in 4.3 beta 1.
• Reproducible in 4.3 dev 6.
• Does not occur in 4.3 dev 5.
• Does not occur in 4.3 dev 3.
• Does not occur in Godot 4.2 stable.

System information

macOS 14.5

Issue description

Line (ENUM_VARIABLE_WITHOUT_DEFAULT):
The variable "test" has an enum type and does not set an explicit default value. The default will be set to "0".

This error message shows up when using an enum in a function parameter. However, this warning is incorrect. The variable test is in fact not an ordinary variable, it is a parameter. And parameters do not have implicit default values. Values are either required (in which case it's provided by the caller) or optional (which have explicit default values).

Steps to reproduce

Put this code in a GDScript file:

enum Test {
	A = 1,
	B = 2,
}

func bugged(test: Test):
	print(test)

Minimal reproduction project (MRP)

enum-parameter-default-bug.zip