e57d84bba0
This PR changes the counter-example accumulator in the match compiler from a `List` (built with cons, producing reverse order) to an `Array` (built with push, preserving declaration order). Missing cases are now reported in the order constructors appear in the inductive type definition. For example, given `inductive Enum | a | b | c | d`, missing cases `c` and `d` were previously shown as `d, c` and are now shown as `c, d`. Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
39 lines
548 B
Text
39 lines
548 B
Text
inductive Enum where | a | b | c | d
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/--
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error: Missing cases:
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Enum.c
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Enum.d
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-/
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#guard_msgs in
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def test : Enum → Nat
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| .a => 0
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| .b => 0
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/--
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error: Missing cases:
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_, false
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-/
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#guard_msgs in
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def test2 : Enum → Bool → Nat
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| .a, _ => 0
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| _, true => 0
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/--
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error: Missing cases:
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(some _), false
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-/
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#guard_msgs in
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def test3 : Option Enum → Bool → Nat
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| none, _ => 0
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| some .a, _ => 0
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| some _, true => 0
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/--
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error: Missing cases:
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_, false
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-/
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#guard_msgs in
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def test4 : String → Bool → Nat
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| "a", _ => 0
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| _, true => 0
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