1ff619295c
Add "star" variadic parameters that accept zero or more arguments, distinguished with a `*` in front of the parameter name.
27 lines
586 B
Rust
27 lines
586 B
Rust
use crate::common::*;
|
|
|
|
/// Parameters can either be…
|
|
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
|
|
pub(crate) enum ParameterKind {
|
|
/// …singular, accepting a single argument
|
|
Singular,
|
|
/// …variadic, accepting one or more arguments
|
|
Plus,
|
|
/// …variadic, accepting zero or more arguments
|
|
Star,
|
|
}
|
|
|
|
impl ParameterKind {
|
|
pub(crate) fn prefix(self) -> Option<&'static str> {
|
|
match self {
|
|
Self::Singular => None,
|
|
Self::Plus => Some("+"),
|
|
Self::Star => Some("*"),
|
|
}
|
|
}
|
|
|
|
pub(crate) fn is_variadic(self) -> bool {
|
|
self != Self::Singular
|
|
}
|
|
}
|