mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-19 01:01:59 +03:00
19 lines
512 B
Plaintext
19 lines
512 B
Plaintext
data Nat : Type where
|
|
Z : Nat
|
|
S : Nat -> Nat
|
|
|
|
plus : Nat -> Nat -> Nat
|
|
plus Z $y = y
|
|
plus (S $k) $y = S (plus k y)
|
|
|
|
data Baz : Nat -> Type where
|
|
AddThings : (x : Nat) -> (y : Nat) -> Baz (plus x y)
|
|
|
|
addBaz : (x : Nat) -> Baz x -> Nat
|
|
addBaz (plus x y) (AddThings x y) = plus x y
|
|
|
|
-- Can't unify because holes are solved as part of the dot pattern (plus x x)
|
|
-- which would accidentally lead to a non-linear pattern
|
|
addBaz3 : (x : Nat) -> Baz x -> Nat
|
|
addBaz3 (plus x x) (AddThings _ _) = plus x x
|