ghc-9.4.0.20220721: The GHC API
Safe HaskellSafe-Inferred
LanguageHaskell2010

GHC.HsToCore.Pmc.Check

Description

Coverage checking step of the Lower Your Guards paper.

Coverage check guard trees (like PmMatch Pre) to get a CheckResult, containing

  1. The set of uncovered values, cr_uncov
  2. And an annotated tree variant (like PmMatch Post) that captures redundancy and inaccessibility information as RedSets annotations

Basically the UA function from Section 5.1, which is an optimised interleaving of U and A from Section 3.2 (Figure 5). The Normalised Refinement Types Nablas are maintained in GHC.HsToCore.Pmc.Solver.

Synopsis

Documentation

newtype CheckAction a Source #

Coverage checking action. Can be composed leftToRight or topToBottom.

Constructors

CA 

Fields

Instances

Instances details
Functor CheckAction Source # 
Instance details

Defined in GHC.HsToCore.Pmc.Check

Methods

fmap :: (a -> b) -> CheckAction a -> CheckAction b Source #

(<$) :: a -> CheckAction b -> CheckAction a Source #