spade_hir_lowering::usefulness

Struct PatStack

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pub(crate) struct PatStack {
    pats: Vec<DeconstructedPattern>,
}

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§pats: Vec<DeconstructedPattern>

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impl PatStack

A stack of subptaterns representing a part of a pattern which is currently being evaluated.

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pub(crate) fn new(inner: Vec<DeconstructedPattern>) -> Self

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fn head(&self) -> &DeconstructedPattern

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fn pop_head(&self, ctor: &Constructor) -> PatStack

Remove the left-most pattern, re-adding the fields of the pattern to the stack. For example, a stack containing [Some((_, _)), None] popped once would result in [(_, _), None], and [_, _, None] after a second pop

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fn is_empty(&self) -> bool

Trait Implementations§

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impl Clone for PatStack

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fn clone(&self) -> PatStack

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for PatStack

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Display for PatStack

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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