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feat(input): add def_command

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🪞👃🪞 2025-08-23 23:19:39 +03:00
parent 022bfa3e20
commit 375b959e33
1 changed files with 22 additions and 5 deletions
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27
input/input.rs
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@ -26,8 +26,8 @@ flex_trait_mut!(Handle <E: Input> {
});
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>
fn execute (&self, state: &mut S) -> Perhaps<Self>;
fn delegate <T> (&self, state: &mut S, wrap: impl Fn(Self)->T) -> Perhaps<T>
where Self: Sized
{
Ok(self.execute(state)?.map(wrap))
@ -35,10 +35,10 @@ pub trait Command<S>: Send + Sync + Sized {
}
impl<S, T: Command<S>> Command<S> for Option<T> {
fn execute (self, _: &mut S) -> Perhaps<Self> {
fn execute (&self, _: &mut S) -> Perhaps<Self> {
Ok(None)
}
fn delegate <U> (self, _: &mut S, _: impl Fn(Self)->U) -> Perhaps<U>
fn delegate <U> (&self, _: &mut S, _: impl Fn(Self)->U) -> Perhaps<U>
where Self: Sized
{
Ok(None)
@ -49,13 +49,30 @@ impl<S, T: Command<S>> Command<S> for Option<T> {
#[macro_export] macro_rules! command {
($(<$($l:lifetime),+>)?|$self:ident:$Command:ty,$state:ident:$State:ty|$handler:expr) => {
impl$(<$($l),+>)? ::tengri::input::Command<$State> for $Command {
fn execute ($self, $state: &mut $State) -> Perhaps<Self> {
fn execute (&$self, $state: &mut $State) -> Perhaps<Self> {
Ok($handler)
}
}
};
}
#[macro_export] macro_rules! def_command (($Command:ident: |$state:ident: $State:ty| {
$($Variant:ident$({$($arg:ident:$Arg:ty),+ $(,)?})?=>$body:expr),* $(,)?
})=>{
#[derive(Debug)]
pub enum $Command {
$($Variant $({ $($arg: $Arg),* })?),*
}
impl Command<$State> for $Command {
fn execute (&self, $state: &mut $State) -> Perhaps<Self> {
match self {
$(Self::$Variant $({ $($arg),* })? => $body,)*
_ => unimplemented!("Command<{}>: {self:?}", stringify!($State)),
}
}
}
});
/// Implement [Handle] for given `State` and `handler`.
#[macro_export] macro_rules! handle {
(|$self:ident:$State:ty,$input:ident|$handler:expr) => {