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Add 'with' and 'with_mut' to 'use_shared_state' #1353

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Aug 15, 2023
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Add 'with' and 'with_mut' to 'use_shared_state' #1353

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14 changes: 14 additions & 0 deletions packages/hooks/src/use_shared_state.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -282,6 +282,20 @@ impl<T> UseSharedState<T> {
),
}
}

/// Take a reference to the inner value temporarily and produce a new value
#[cfg_attr(debug_assertions, track_caller)]
#[cfg_attr(debug_assertions, inline(never))]
pub fn with<O>(&self, immutable_callback: impl FnOnce(&T) -> O) -> O {
immutable_callback(&*self.read())
}

/// Take a mutable reference to the inner value temporarily and produce a new value
#[cfg_attr(debug_assertions, track_caller)]
#[cfg_attr(debug_assertions, inline(never))]
pub fn with_mut<O>(&self, mutable_callback: impl FnOnce(&mut T) -> O) -> O {
mutable_callback(&mut *self.write())
}
}

impl<T> Clone for UseSharedState<T> {
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