Allow adding a unit hint when exporting variables

[mieldepoche]

In godot 4 some exports have units hints:

AFAIK it's not possible to specify your own unit hints for exports yet.

What about @export("unit hint") var foo ?
The hint would be shared among vector components if needed.

Examples:

@export("m/s") var speed := 10.0
@export_range(1, 60, 1, "", "s") var lifetime := 10.0

[Calinou]

I think you can already specify a custom hint string with annotations somehow. I don't remember the syntax though; godotengine/godot#62713 may have documented this.

[mieldepoche]

Yeah, I made a proposal but was closed for this reason.
Syntax is:

# Shows `unit` as a suffix. Only works for @export_range
@export_range(0, 20, 1, "suffix:unit") var x

[dalexeev]

@mieldepoche Is your issue resolved? Note that in 4.3 we also added @export_custom, which allows you to provide arbitrary hint, hint string, and usage flags.