22 lines
393 B
Text
22 lines
393 B
Text
import Lean
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set_option compiler.checkTypes true
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def f1 (x : Option Nat) (y : Nat) : Nat :=
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let z := some y
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if let (some x, some y) := (x, z) then
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x + y
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else
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0
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inductive Ty where
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| c1 | c2 | c3 | c4 | c5
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def f2 (a b : Ty) (n : Nat) : Nat :=
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let x := match a with
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| .c1 => 10 * n
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| _ => 20 * n
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let y := match b with
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| .c2 => 10 + n
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| _ => 20 + n
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x + y
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