Agda-2.5.2: A dependently typed functional programming language and proof assistant

Safe Haskell | None
Language | Haskell2010

Agda.TypeChecking.RecordPatterns

Description

Code which replaces pattern matching on record constructors with uses of projection functions.

Synopsis

- translateRecordPatterns :: Clause -> TCM Clause
- translateCompiledClauses :: CompiledClauses -> TCM CompiledClauses
- translateSplitTree :: SplitTree -> TCM SplitTree
- recordPatternToProjections :: DeBruijnPattern -> TCM [Term -> Term]

# Documentation

translateRecordPatterns :: Clause -> TCM Clause #

Replaces pattern matching on record constructors with uses of projection functions. Does not remove record constructor patterns which have sub-patterns containing non-record constructor or literal patterns.

translateCompiledClauses :: CompiledClauses -> TCM CompiledClauses #

translateSplitTree :: SplitTree -> TCM SplitTree #

Bottom-up procedure to record-pattern-translate split tree.

recordPatternToProjections :: DeBruijnPattern -> TCM [Term -> Term] #

Take a record pattern `p` and yield a list of projections corresponding to the pattern variables, from left to right.

E.g. for `(x , (y , z))` we return `[ fst, fst . snd, snd . snd ]`.

If it is not a record pattern, error `ShouldBeRecordPattern` is raised.