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pub use either::Either;
pub use swc_visit_macros::define;
pub mod util;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct Optional<V> {
pub enabled: bool,
pub visitor: V,
}
impl<V> Optional<V> {
pub fn new(visitor: V, enabled: bool) -> Self {
Self { enabled, visitor }
}
}
pub trait Repeated {
fn changed(&self) -> bool;
fn reset(&mut self);
}
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
pub struct AndThen<A, B> {
pub first: A,
pub second: B,
}
#[macro_export]
macro_rules! chain {
($a:expr, $b:expr) => {{
use $crate::AndThen;
AndThen {
first: $a,
second: $b,
}
}};
($a:expr, $b:expr,) => {
chain!($a, $b)
};
($a:expr, $b:expr, $($rest:tt)+) => {{
use $crate::AndThen;
AndThen{
first: $a,
second: chain!($b, $($rest)*),
}
}};
}
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
pub struct Repeat<V>
where
V: Repeated,
{
pub pass: V,
}
impl<V> Repeat<V>
where
V: Repeated,
{
pub fn new(pass: V) -> Self {
Self { pass }
}
}
impl<V> Repeated for Repeat<V>
where
V: Repeated,
{
fn changed(&self) -> bool {
self.pass.changed()
}
fn reset(&mut self) {
self.pass.reset()
}
}
impl<A, B> Repeated for AndThen<A, B>
where
A: Repeated,
B: Repeated,
{
fn changed(&self) -> bool {
self.first.changed() || self.second.changed()
}
fn reset(&mut self) {
self.first.reset();
self.second.reset();
}
}