90a79a0b06
Now, `universe` may declare many universes. The goal is to make it consistent with the `variable` command
44 lines
850 B
Text
44 lines
850 B
Text
import Lean.Meta
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open Lean
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open Lean.Meta
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universe u v w
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abbrev M := ExceptT String MetaM
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def testM {α} [BEq α] [ToString α] (x : M α) (expected : α) : MetaM Unit := do
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let r ← x
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match r with
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| Except.ok a => unless a == expected do throwError m!"unexpected result {a}"
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| Except.error e => throwError m!"FAILED: {e}"
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@[noinline] def act1 : M Nat :=
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throw <| Exception.error Syntax.missing "Error at act1"
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def g1 : M Nat :=
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tryCatchThe Exception
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(tryCatchThe String act1 (fun ex => pure 100))
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(fun ex => pure 200)
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#eval testM g1 200
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@[noinline] def act2 : M Nat :=
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throwThe String "hello world"
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def g2 : M Nat :=
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tryCatchThe Exception
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(tryCatchThe String act2 (fun ex => pure 100))
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(fun ex => pure 200)
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#eval testM g2 100
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def h1 : CoreM Nat :=
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pure 10
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#eval h1
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def h2 : MetaM Nat :=
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pure 20
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#eval h2
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