27b583d304
This PR changes the elaboration of the `structure`/`class` commands so that default values have later fields in context as well. This allows field defaults to depend on fields that come both before and after them. While this was already the case for inherited fields to some degree, it now applies uniformly to all fields. Additionally, when elaborating the default value for a field, all fields that depend on it are cleared from the context to avoid situations where the default value depends on itself. This addresses an issue reported by Aaron Liu [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/default.20structure.20values.20can.20depend.20on.20themselves/near/578014370).
43 lines
1.8 KiB
Text
43 lines
1.8 KiB
Text
struct1.lean:9:14-9:17: error: Invalid resulting type: Expected a sort
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Hint: Examples of valid sorts include `Type _`, `Sort _`, and `Prop`
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struct1.lean:12:20-12:29: error: expected structure
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Hint: This error is possibly due to a change in the `structure` syntax. Now the syntax is `structure S : Type extends P` rather than `structure S extends P : Type`.
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The purpose of the change is to accommodate `structure S extends toP : P` syntax for naming parent projections.
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struct1.lean:15:28-15:33: warning: Field `x` from `B` has already been declared
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struct1.lean:16:1-16:2: error: Field `x` has already been declared in a parent structure
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struct1.lean:17:30-17:35: warning: Duplicate parent structure `A`; skipping
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struct1.lean:19:27-19:33: error: Field type mismatch: Field `x` from parent `B` has type
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Bool
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but is expected to have type
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Nat
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struct1.lean:30:1-30:2: error: Field `x` has already been declared
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struct1.lean:33:1-33:2: error: Field `x` has already been declared in a parent structure
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struct1.lean:36:6-36:10: error: Type mismatch
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true
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has type
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Bool
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but is expected to have type
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Nat
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struct1.lean:39:1-39:2: error: Type mismatch
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true
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has type
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Bool
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but is expected to have type
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Nat
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struct1.lean:42:12-42:16: error: Type mismatch
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true
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has type
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Bool
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but is expected to have type
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Nat
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struct1.lean:45:0-45:13: error: Constructor cannot be marked `private` because it is already in a `private` structure
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Hint: Remove `private` modifier from constructor
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p̵r̵i̵v̵a̵t̵e̵ ̵mk ::
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struct1.lean:48:0-48:15: error: Constructor cannot be `protected` because this structure is `private`
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struct1.lean:51:0-51:19: error: Field cannot be marked `protected` because this structure is `private`
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Spriv : Type
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struct1.lean:57:7-57:12: error(lean.unknownIdentifier): Unknown constant `S.mk2`
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