lean4-htt/tests/elab/classical.lean
Garmelon 08eb78a5b2
chore: switch to new test/bench suite (#12590)
This PR sets up the new integrated test/bench suite. It then migrates
all benchmarks and some related tests to the new suite. There's also
some documentation and some linting.

For now, a lot of the old tests are left alone so this PR doesn't become
even larger than it already is. Eventually, all tests should be migrated
to the new suite though so there isn't a confusing mix of two systems.
2026-02-25 13:51:53 +00:00

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example : Bool := by
fail_if_success have := ∀ p, decide p -- no classical in scope
classical
have := ∀ p, decide p -- uses the classical instance
guard_expr decide (0 < 1) = @decide (0 < 1) (Nat.decLt 0 1)
exact decide (0 < 1) -- will use the decidable instance
-- double check no leakage
example : Bool := by
fail_if_success have := ∀ p, decide p -- no classical in scope
exact decide (0 < 1) -- uses the decidable instance
-- check that classical respects tactic blocks
example : Bool := by
fail_if_success have := ∀ p, decide p -- no classical in scope
( -- start a scope
classical
have := ∀ p, decide p -- uses the classical instance
)
fail_if_success have := ∀ p, decide p -- no classical in scope again
exact decide (0 < 1) -- will use the decidable instance