If the type of a variable is a built-in Variant type, then it will
automatically be assigned a default value based on the type. This means
that the explicit initialization may be unnecessary. Thus this commit
removes the warning in such case.
This also changes the meaning of the unassigned warning to happen when
the variable is used before being assigned, not when it has zero
assignments.
If the left value type is known to be String, assume the format operator
(`%`) will return a string, since it works with any type in the right
hand side. This is also used by type inference even if the right hand
type is unknown at compile time.
Allows setting any arbitrary hint, hint string, and usage flags.
Useful for more complex hints or potential future hints not
available as a dedicated annotation.
Not defaulting to the native type rationale:
Defaulting to the native type is less than useful, as:
* There are very few native types that are extensible and have static methods.
* Defaulting to the native type does not account for a method being script-defined.
While the "real fix" would be to carefully track the source of the method, the get_function_signature method is already complicated enough.
This will at least ensure the resulting code should always be valid.
Not triggering on self-calls rationale:
Found in PR comment https://github.com/godotengine/godot/pull/85918#issuecomment-1935864459
```
static func example():
pass
func example2():
example() # self-call on static function
```
Disabling this warning on self-calls is:
* Consistent with other languages
* Important for anonymous classes (where the output code is unusable)
- Unify documentation, hoping to clear misconcepctions about about propagation of the cache mode across dependant loads.
- Clarify in docs that `CACHE_MODE_REPLACE` now also works on the main resource (from #87008).
- Add two recursive modes, counterparts of `CACHE_MODE_REPLACE` and `CACHE_MODE_IGNORE`, since it seems some need them (see #59669, #82830).
- Let resources, even loaded with one of the ignore-cache modes, get a path, which is useful for tools.
