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b786621ed6
As it was, there was significant backtracking for big expressions, getting to the end, not finding a **, so having to try again for application expressions. Fixes #532
87 lines
3.3 KiB
Idris
87 lines
3.3 KiB
Idris
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module Lambda
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%default total
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data Ty = TyFunc Ty Ty | TyNat
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data Context = Empty | Extend Context Ty
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data Contains : Context -> Ty -> Type where
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Here : Contains (Extend g ty) ty
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There : (rest : Contains g ty)
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-> Contains (Extend g not_ty) ty
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data Term : Context -> Ty -> Type where
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Var : (idx : Contains g ty)
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-> Term g ty
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Func : (body : Term (Extend g tyA) tyB)
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-> Term g (TyFunc tyA tyB)
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App : (func : Term g (TyFunc tyA tyB))
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-> (var : Term g tyA)
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-> Term g tyB
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Zero : Term g TyNat
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Next : (inner : Term g TyNat)
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-> Term g TyNat
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Case : (scrutinee : Term g TyNat)
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-> (zero : Term g tyA)
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-> (next : Term (Extend g TyNat) tyA)
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-> Term g tyA
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Plus : Term g TyNat
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-> Term g TyNat
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-> Term g TyNat
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Rec : (body : Term (Extend g tyA) tyA)
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-> Term g tyA
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term : Term Empty
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(TyFunc TyNat -- (Var Here) -
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(TyFunc TyNat -- (Var (There Here)) -
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(TyFunc TyNat -- (Var (There (There Here))) -
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(TyFunc TyNat -- (Var (There (There (There Here)))) -
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(TyFunc TyNat -- (Var (There (There (There (There Here))))) -
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(TyFunc TyNat -- (Var (There (There (There (There (There Here)))))) -
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(TyFunc TyNat -- (Var (There (There (There (There (There (There Here)))))))
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TyNat
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)
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)
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)
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)
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)
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)
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)
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term =
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Func
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(Func
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(Func
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(Func
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(Func
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(Func
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(Func
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(Func (Plus (Var Here)
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(Plus (Var (There Here))
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(Plus (Var (There (There Here)))
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(Plus (Var (There (There (There Here))))
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(Plus (Var (There (There (There (There Here)))))
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(Plus (Var (There (There (There (There (There Here))))))
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(Var (There (There (There (There (There (There Here)))))))
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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