macro_rules! define_implicit_function {
($name:ident, args: [$arg_type0:path], $body:expr) => { ... };
($name:ident, args: [$arg_type0:path, $arg_type1:path], $body:expr) => { ... };
($name:ident, args: [$arg_type0:path, $arg_type1:path, $arg_type2:path], $body:expr) => { ... };
($name:ident, args: [$arg_type0:path, $arg_type1:path, $arg_type2:path, $arg_type3:path], $body:expr) => { ... };
}Expand description
Define an implicit (method-style) function for specific Value types.
Expands to a FunctionHandler that:
- Validates argument count (1–4).
- For each argument, reuses the actual type if it matches
$arg_typeN, otherwise converts viato_type. - Invokes
$bodywith references to typed arguments and, for multi-arg variants, the evaluation context.