pub enum Cost {
Negligible,
Specialized,
Canonicalize,
}Expand description
When calling is_constant the children are all checked for constantness.
This enum decide at each precision/cost level the constant check should run as.
The cost increase as we move down the list.
Variants§
Negligible
Only apply constant time computation to estimate constantness.
Specialized
Allow the encoding to do a linear amount of work to determine is constant. Each encoding should implement short-circuiting make the common case runtime well below a linear scan.
Canonicalize
Same as linear, but when necessary canonicalize the array and check is constant. This must always return a known answer.
Trait Implementations§
impl Copy for Cost
impl Eq for Cost
impl StructuralPartialEq for Cost
Auto Trait Implementations§
impl Freeze for Cost
impl RefUnwindSafe for Cost
impl Send for Cost
impl Sync for Cost
impl Unpin for Cost
impl UnwindSafe for Cost
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