Attribute Macro precompile_util_macro::generate_function_selector

#[generate_function_selector]

This macro allows to associate to each variant of an enumeration a discriminant (of type u32 whose value corresponds to the first 4 bytes of the Hash Keccak256 of the character string indicated by the user of this macro.

Usage:

#[generate_function_selector]
enum Action {
	Toto = "toto()",
	Tata = "tata()",
}

Extended to:

#[repr(u32)]
enum Action {
	Toto = 119097542u32,
	Tata = 1414311903u32,
}