lean4-htt/tests/lean/ppBeta.lean
Kyle Miller 044bfdb098
feat: eliminate letFun support, deprecate let_fun syntax (#9086)
This PR deprecates `let_fun` syntax in favor of `have` and removes
`letFun` support from WHNF and `simp`.
2025-06-30 02:10:18 +00:00

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#check (fun x => x) Nat
#check have x := Nat; x
set_option pp.beta true
#check (fun x => x) Nat
#check have x := Nat; x
set_option pp.all true
#check (fun x => x) Nat