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feat(input): add defcom! macro

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🪞👃🪞 2025-04-24 19:33:05 +03:00
parent fa6f6dab1d
commit 3861439c49
1 changed files with 16 additions and 0 deletions
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16
input/src/command.rs
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@ -1,4 +1,18 @@
use crate::*;
#[macro_export] macro_rules! defcom {
(|$self:ident, $app:ident:$App:ty| $($Command:ident { $(
$Variant:ident $(($($param:ident: $Param:ty),+))? => $expr:expr
)* $(,)? })*) => {
$(#[derive(Clone, Debug)] pub enum $Command {
$($Variant $(($($Param),+))?),*
})*
$(command!(|$self: $Command, $app: $App|match $self {
$($Command::$Variant $(($($param),+))? => $expr),*
});)*
}
}
#[macro_export] macro_rules! command {
($(<$($l:lifetime),+>)?|$self:ident:$Command:ty,$state:ident:$State:ty|$handler:expr) => {
impl$(<$($l),+>)? Command<$State> for $Command {
@ -8,6 +22,7 @@ use crate::*;
}
};
}
pub trait Command<S>: Send + Sync + Sized {
fn execute (self, state: &mut S) -> Perhaps<Self>;
fn delegate <T> (self, state: &mut S, wrap: impl Fn(Self)->T) -> Perhaps<T>
@ -16,6 +31,7 @@ pub trait Command<S>: Send + Sync + Sized {
Ok(self.execute(state)?.map(wrap))
}
}
impl<S, T: Command<S>> Command<S> for Option<T> {
fn execute (self, _: &mut S) -> Perhaps<Self> {
Ok(None)