Agda-2.5.1: A dependently typed functional programming language and proof assistant

Safe HaskellNone
LanguageHaskell98

Agda.Syntax.Internal.Pattern

Contents

Synopsis

Tools for clauses

clauseArgs :: Clause -> Args Source

Translate the clause patterns to terms with free variables bound by the clause telescope.

Precondition: no projection patterns.

clauseElims :: Clause -> Elims Source

Translate the clause patterns to an elimination spine with free variables bound by the clause telescope.

class FunArity a where Source

Arity of a function, computed from clauses.

Methods

funArity :: a -> Int Source

Instances

FunArity Clause Source

Get the number of initial Apply patterns in a clause.

IsProjP p => FunArity [p] Source

Get the number of initial Apply patterns.

FunArity [Clause] Source

Get the number of common initial Apply patterns in a list of clauses.

Tools for patterns

class LabelPatVars a b i | b -> i where Source

Label the pattern variables from left to right using one label for each variable pattern and one for each dot pattern.

Methods

labelPatVars :: a -> State [i] b Source

unlabelPatVars :: b -> a Source

Intended, but unpractical due to the absence of type-level lambda, is: labelPatVars :: f (Pattern' x) -> State [i] (f (Pattern' (i,x)))

Instances

LabelPatVars a b i => LabelPatVars [a] [b] i Source 
LabelPatVars a b i => LabelPatVars (Arg a) (Arg b) i Source 
LabelPatVars (Pattern' x) (Pattern' (i, x)) i Source 
LabelPatVars a b i => LabelPatVars (Named x a) (Named x b) i Source 

numberPatVars :: LabelPatVars a b Int => Permutation -> a -> b Source

Augment pattern variables with their de Bruijn index.