Struct mz_transform::analysis::non_negative::NonNegative

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pub struct NonNegative;
Expand description

Analysis that determines if all accumulations at all times are non-negative.

The analysis assumes that Id::Global references only refer to non-negative collections.

Trait Implementations§

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impl Analysis for NonNegative

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type Value = bool

The type of value this analysis associates with an expression.
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fn derive( &self, expr: &MirRelationExpr, index: usize, results: &[Self::Value], depends: &Derived, ) -> Self::Value

The analysis value derived for an expression, given other analysis results. Read more
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fn lattice() -> Option<Box<dyn Lattice<Self::Value>>>

When available, provide a lattice interface to allow optimistic recursion. Read more
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fn announce_dependencies(_builder: &mut DerivedBuilder<'_>)

Announce any dependencies this analysis has on other analyses. Read more
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impl Debug for NonNegative

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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<T> Any for T
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fn type_id(&self) -> TypeId

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where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

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where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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