spade_hir_lowering::usefulness

Struct Matrix

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pub(crate) struct Matrix {
    pub patterns: Vec<PatStack>,
}
Expand description

A vector of patterns which generally make up a set of patterns for which to check usefulness against. All patterns in the matrix must be of equal length

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§patterns: Vec<PatStack>

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impl Matrix

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pub(crate) fn new(patterns: &[PatStack]) -> Self

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fn empty() -> Self

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fn rows(&self) -> &[PatStack]

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fn push(&mut self, new: PatStack)

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fn specialize(&self, ctor: Constructor) -> Matrix

Specializing a matrix with respect to a constructor ctor filters out branches which are not covered by ctor and pops the inner patterns into a new matrix.

For example, the stack [ [Some(true), ] , [Some(), _] , [None, _] ] specialized against Some(_) results in [ [true, ] , [, _] ]

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impl Debug for Matrix

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl Freeze for Matrix

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impl RefUnwindSafe for Matrix

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impl Send for Matrix

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impl Sync for Matrix

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impl Unpin for Matrix

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impl UnwindSafe for Matrix

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impl<T> Any for T
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fn into_either(self, into_left: bool) -> Either<Self, Self>

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fn tap(self, func: impl FnOnce(&Self)) -> Self

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