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#![feature(test)]
#[macro_use]
extern crate lazy_static;
pub mod trim;
pub trait Prune: IsNone {
fn prune(self) -> Self;
}
pub trait IsNone {
fn is_none(&self) -> bool {
false
}
}
impl<T> IsNone for Option<T> {
fn is_none(&self) -> bool {
self.is_none()
}
}
impl<T> Prune for Option<T>
where
T: Prune + IsNone,
{
fn prune(self) -> Self {
match self {
None => None,
Some(s) => {
let s = s.prune();
if s.is_none() {
None
} else {
Some(s)
}
}
}
}
}
impl<T> IsNone for Vec<T> {}
impl<T> Prune for Vec<T>
where
T: Prune,
{
fn prune(self) -> Self {
self.into_iter().map(Prune::prune).collect()
}
}
#[derive(Debug)]
pub enum Operator {
Trim,
TrimStart,
TrimEnd,
NoWhitespace,
Nested,
Custom(String),
}
macro_rules! tuple_impls {
($(
($(($idx:tt)),+)
)+) => {
tuple_impls! {
$(
($((T, $idx)),+)
)+
}
};
($(
($(($T:ident, $idx:tt)),+)
)+) => {
$(
impl<T> IsNone for ($($T),+) {}
impl<T> Prune for ($($T),+) where T: Prune {
fn prune(self) -> Self {
(
$(self.$idx.prune()),+
)
}
}
)+
};
}
tuple_impls! {
((0), (1))
((0), (1), (2))
((0), (1), (2), (3))
((0), (1), (2), (3), (4))
((0), (1), (2), (3), (4), (5))
((0), (1), (2), (3), (4), (5), (6))
((0), (1), (2), (3), (4), (5), (6), (7))
((0), (1), (2), (3), (4), (5), (6), (7), (8))
((0), (1), (2), (3), (4), (5), (6), (7), (8), (9))
((0), (1), (2), (3), (4), (5), (6), (7), (8), (9), (10))
((0), (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11))
((0), (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11), (12))
}