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merge Quox.{Syntax.Term.}Reduce

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rhiannon morris 2022-05-25 15:59:58 +02:00
parent b0692c15b9
commit 3cf246b4dc
4 changed files with 132 additions and 132 deletions
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1
lib/Quox/Equal.idr
View file

@ -1,7 +1,6 @@
module Quox.Equal module Quox.Equal
import public Quox.Syntax import public Quox.Syntax
import public Quox.Reduce
import Control.Monad.Either import Control.Monad.Either
import Generics.Derive import Generics.Derive

130
lib/Quox/Reduce.idr
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@ -1,130 +0,0 @@
module Quox.Reduce
import public Quox.Syntax
%default total
public export
data IsRedexT : Term d n -> Type where
IsUpsilonT : IsRedexT $ E (_ :# _)
IsCloT : IsRedexT $ CloT {}
IsDCloT : IsRedexT $ DCloT {}
public export %inline
NotRedexT : Term d n -> Type
NotRedexT = Not . IsRedexT
public export
data IsRedexE : Elim d n -> Type where
IsUpsilonE : IsRedexE $ E _ :# _
IsBetaLam : IsRedexE $ (Lam {} :# Pi {}) :@ _
IsCloE : IsRedexE $ CloE {}
IsDCloE : IsRedexE $ DCloE {}
public export %inline
NotRedexE : Elim d n -> Type
NotRedexE = Not . IsRedexE
export %inline
isRedexT : (t : Term d n) -> Dec (IsRedexT t)
isRedexT (E (_ :# _)) = Yes IsUpsilonT
isRedexT (CloT {}) = Yes IsCloT
isRedexT (DCloT {}) = Yes IsDCloT
isRedexT (TYPE _) = No $ \x => case x of {}
isRedexT (Pi {}) = No $ \x => case x of {}
isRedexT (Lam {}) = No $ \x => case x of {}
isRedexT (E (F _)) = No $ \x => case x of {}
isRedexT (E (B _)) = No $ \x => case x of {}
isRedexT (E (_ :@ _)) = No $ \x => case x of {}
isRedexT (E (CloE {})) = No $ \x => case x of {}
isRedexT (E (DCloE {})) = No $ \x => case x of {}
export %inline
isRedexE : (e : Elim d n) -> Dec (IsRedexE e)
isRedexE (E _ :# _) = Yes IsUpsilonE
isRedexE ((Lam {} :# Pi {}) :@ _) = Yes IsBetaLam
isRedexE (CloE {}) = Yes IsCloE
isRedexE (DCloE {}) = Yes IsDCloE
isRedexE (F x) = No $ \x => case x of {}
isRedexE (B i) = No $ \x => case x of {}
isRedexE (F _ :@ _) = No $ \x => case x of {}
isRedexE (B _ :@ _) = No $ \x => case x of {}
isRedexE (_ :@ _ :@ _) = No $ \x => case x of {}
isRedexE ((TYPE _ :# _) :@ _) = No $ \x => case x of {}
isRedexE ((Pi {} :# _) :@ _) = No $ \x => case x of {}
isRedexE ((Lam {} :# TYPE _) :@ _) = No $ \x => case x of {}
isRedexE ((Lam {} :# Lam {}) :@ _) = No $ \x => case x of {}
isRedexE ((Lam {} :# E _) :@ _) = No $ \x => case x of {}
isRedexE ((Lam {} :# CloT {}) :@ _) = No $ \x => case x of {}
isRedexE ((Lam {} :# DCloT {}) :@ _) = No $ \x => case x of {}
isRedexE ((E _ :# _) :@ _) = No $ \x => case x of {}
isRedexE ((CloT {} :# _) :@ _) = No $ \x => case x of {}
isRedexE ((DCloT {} :# _) :@ _) = No $ \x => case x of {}
isRedexE (CloE {} :@ _) = No $ \x => case x of {}
isRedexE (DCloE {} :@ _) = No $ \x => case x of {}
isRedexE (TYPE _ :# _) = No $ \x => case x of {}
isRedexE (Pi {} :# _) = No $ \x => case x of {}
isRedexE (Lam {} :# _) = No $ \x => case x of {}
isRedexE (CloT {} :# _) = No $ \x => case x of {}
isRedexE (DCloT {} :# _) = No $ \x => case x of {}
public export %inline
RedexTerm : Nat -> Nat -> Type
RedexTerm d n = Subset (Term d n) IsRedexT
public export %inline
NonRedexTerm : Nat -> Nat -> Type
NonRedexTerm d n = Subset (Term d n) NotRedexT
public export %inline
RedexElim : Nat -> Nat -> Type
RedexElim d n = Subset (Elim d n) IsRedexE
public export %inline
NonRedexElim : Nat -> Nat -> Type
NonRedexElim d n = Subset (Elim d n) NotRedexE
||| substitute a term with annotation for the bound variable of a `ScopeTerm`
export %inline
substScope : (arg, argTy : Term d n) -> (body : ScopeTerm d n) -> Term d n
substScope arg argTy (TUsed body) = body // one (arg :# argTy)
substScope arg argTy (TUnused body) = body
export %inline
stepT' : (s : Term d n) -> IsRedexT s -> Term d n
stepT' (E (s :# _)) IsUpsilonT = s
stepT' (CloT s th) IsCloT = pushSubstsTWith' id th s
stepT' (DCloT s th) IsDCloT = pushSubstsTWith' th id s
export %inline
stepT : (s : Term d n) -> Either (NotRedexT s) (Term d n)
stepT s = case isRedexT s of Yes y => Right $ stepT' s y; No n => Left n
export %inline
stepE' : (e : Elim d n) -> IsRedexE e -> Elim d n
stepE' (E e :# _) IsUpsilonE = e
stepE' ((Lam {body, _} :# Pi {arg, res, _}) :@ s) IsBetaLam =
substScope s arg body :# substScope s arg res
stepE' (CloE e th) IsCloE = pushSubstsEWith' id th e
stepE' (DCloE e th) IsDCloE = pushSubstsEWith' th id e
export %inline
stepE : (e : Elim d n) -> Either (NotRedexE e) (Elim d n)
stepE e = case isRedexE e of Yes y => Right $ stepE' e y; No n => Left n
export covering
whnfT : Term d n -> NonRedexTerm d n
whnfT s = case stepT s of
Right s' => whnfT s'
Left done => Element s done
export covering
whnfE : Elim d n -> NonRedexElim d n
whnfE e = case stepE e of
Right e' => whnfE e'
Left done => Element e done

132
lib/Quox/Syntax/Term/Reduce.idr
View file

@ -162,3 +162,135 @@ weakT t = t //. shift 1
public export %inline public export %inline
weakE : Elim d n -> Elim d (S n) weakE : Elim d n -> Elim d (S n)
weakE t = t //. shift 1 weakE t = t //. shift 1
mutual
public export
data IsRedexT : Term d n -> Type where
IsUpsilonT : IsRedexT $ E (_ :# _)
IsCloT : IsRedexT $ CloT {}
IsDCloT : IsRedexT $ DCloT {}
IsERedex : IsRedexE e -> IsRedexT $ E e
public export %inline
NotRedexT : Term d n -> Type
NotRedexT = Not . IsRedexT
public export
data IsRedexE : Elim d n -> Type where
IsUpsilonE : IsRedexE $ E _ :# _
IsBetaLam : IsRedexE $ (Lam {} :# Pi {}) :@ _
IsCloE : IsRedexE $ CloE {}
IsDCloE : IsRedexE $ DCloE {}
public export %inline
NotRedexE : Elim d n -> Type
NotRedexE = Not . IsRedexE
mutual
export %inline
isRedexT : (t : Term d n) -> Dec (IsRedexT t)
isRedexT (E (tm :# ty)) = Yes IsUpsilonT
isRedexT (CloT {}) = Yes IsCloT
isRedexT (DCloT {}) = Yes IsDCloT
isRedexT (E (CloE {})) = Yes $ IsERedex IsCloE
isRedexT (E (DCloE {})) = Yes $ IsERedex IsDCloE
isRedexT (E e@(_ :@ _)) with (isRedexE e)
_ | Yes yes = Yes $ IsERedex yes
_ | No no = No \case IsERedex p => no p
isRedexT (TYPE {}) = No $ \x => case x of {}
isRedexT (Pi {}) = No $ \x => case x of {}
isRedexT (Lam {}) = No $ \x => case x of {}
isRedexT (E (F _)) = No $ \x => case x of IsERedex _ impossible
isRedexT (E (B _)) = No $ \x => case x of IsERedex _ impossible
export %inline
isRedexE : (e : Elim d n) -> Dec (IsRedexE e)
isRedexE (E _ :# _) = Yes IsUpsilonE
isRedexE ((Lam {} :# Pi {}) :@ _) = Yes IsBetaLam
isRedexE (CloE {}) = Yes IsCloE
isRedexE (DCloE {}) = Yes IsDCloE
isRedexE (F x) = No $ \x => case x of {}
isRedexE (B i) = No $ \x => case x of {}
isRedexE (F _ :@ _) = No $ \x => case x of {}
isRedexE (B _ :@ _) = No $ \x => case x of {}
isRedexE (_ :@ _ :@ _) = No $ \x => case x of {}
isRedexE ((TYPE _ :# _) :@ _) = No $ \x => case x of {}
isRedexE ((Pi {} :# _) :@ _) = No $ \x => case x of {}
isRedexE ((Lam {} :# TYPE _) :@ _) = No $ \x => case x of {}
isRedexE ((Lam {} :# Lam {}) :@ _) = No $ \x => case x of {}
isRedexE ((Lam {} :# E _) :@ _) = No $ \x => case x of {}
isRedexE ((Lam {} :# CloT {}) :@ _) = No $ \x => case x of {}
isRedexE ((Lam {} :# DCloT {}) :@ _) = No $ \x => case x of {}
isRedexE ((E _ :# _) :@ _) = No $ \x => case x of {}
isRedexE ((CloT {} :# _) :@ _) = No $ \x => case x of {}
isRedexE ((DCloT {} :# _) :@ _) = No $ \x => case x of {}
isRedexE (CloE {} :@ _) = No $ \x => case x of {}
isRedexE (DCloE {} :@ _) = No $ \x => case x of {}
isRedexE (TYPE _ :# _) = No $ \x => case x of {}
isRedexE (Pi {} :# _) = No $ \x => case x of {}
isRedexE (Lam {} :# _) = No $ \x => case x of {}
isRedexE (CloT {} :# _) = No $ \x => case x of {}
isRedexE (DCloT {} :# _) = No $ \x => case x of {}
public export %inline
RedexTerm : Nat -> Nat -> Type
RedexTerm d n = Subset (Term d n) IsRedexT
public export %inline
NonRedexTerm : Nat -> Nat -> Type
NonRedexTerm d n = Subset (Term d n) NotRedexT
public export %inline
RedexElim : Nat -> Nat -> Type
RedexElim d n = Subset (Elim d n) IsRedexE
public export %inline
NonRedexElim : Nat -> Nat -> Type
NonRedexElim d n = Subset (Elim d n) NotRedexE
||| substitute a term with annotation for the bound variable of a `ScopeTerm`
export %inline
substScope : (arg, argTy : Term d n) -> (body : ScopeTerm d n) -> Term d n
substScope arg argTy (TUsed body) = body // one (arg :# argTy)
substScope arg argTy (TUnused body) = body
mutual
export %inline
stepT' : (s : Term d n) -> IsRedexT s -> Term d n
stepT' (E (s :# _)) IsUpsilonT = s
stepT' (CloT s th) IsCloT = pushSubstsTWith' id th s
stepT' (DCloT s th) IsDCloT = pushSubstsTWith' th id s
stepT' (E e) (IsERedex p) = E $ stepE' e p
export %inline
stepE' : (e : Elim d n) -> IsRedexE e -> Elim d n
stepE' (E e :# _) IsUpsilonE = e
stepE' ((Lam {body, _} :# Pi {arg, res, _}) :@ s) IsBetaLam =
substScope s arg body :# substScope s arg res
stepE' (CloE e th) IsCloE = pushSubstsEWith' id th e
stepE' (DCloE e th) IsDCloE = pushSubstsEWith' th id e
export %inline
stepT : (s : Term d n) -> Either (NotRedexT s) (Term d n)
stepT s = case isRedexT s of Yes y => Right $ stepT' s y; No n => Left n
export %inline
stepE : (e : Elim d n) -> Either (NotRedexE e) (Elim d n)
stepE e = case isRedexE e of Yes y => Right $ stepE' e y; No n => Left n
export covering
whnfT : Term d n -> NonRedexTerm d n
whnfT s = case stepT s of
Right s' => whnfT s'
Left done => Element s done
export covering
whnfE : Elim d n -> NonRedexElim d n
whnfE e = case stepE e of
Right e' => whnfE e'
Left done => Element e done

1
lib/quox-lib.ipkg
View file

@ -32,6 +32,5 @@ modules =
Quox.Context, Quox.Context,
Quox.Equal, Quox.Equal,
Quox.Name, Quox.Name,
Quox.Reduce,
Quox.Typing, Quox.Typing,
Quox.Typechecker Quox.Typechecker