b5122b6a7b
This change * moves `termination_by` and `decreasing_by` next to the function they apply to * simplify the syntax of `termination_by` * apply the `decreasing_by` goal to all goals at once, for better interactive use. See the section in `RELEASES.md` for more details and migration advise. This is a hard breaking change, requiring developers to touch every `termination_by` in their code base. We decided to still do it as a hard-breaking change, because supporting both old and new syntax at the same time would be non-trivial, and not save that much. Moreover, this requires changes to some metaprograms that developers might have written, and supporting both syntaxes at the same time would make _their_ migration harder.
24 lines
532 B
Text
24 lines
532 B
Text
/-!
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Test that PackMutual isn't confused when a recursive call has more arguments than is packed
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into the unary argument, which can happen if the return type is a function type.
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-/
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mutual
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inductive A : Type
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| baseA : A
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| fromB : B → A
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inductive B : Type
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| fromA : A → B
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end
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mutual
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def foo : B → Prop
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| .fromA a => bar a 0
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termination_by x => sizeOf x
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def bar : A → Nat → Prop
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| .baseA => (fun _ => True)
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| .fromB b => (fun (c : Nat) => ∃ (t : Nat), foo b)
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termination_by x => sizeOf x
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end
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