This PR changes "structure-like" terminology to "non-recursive
structure" across internal documentation, error messages, the
metaprogramming API, and the kernel, to clarify Lean's type theory. A
*structure* is a one-constructor inductive type with no indices — these
can be created by either the `structure` or `inductive` commands — and
are supported by the primitive `Expr.proj` projections. Only
*non-recursive* structures have an eta conversion rule. The PR
description contains the APIs that were renamed.
Addresses RFC #5891, which proposed this rename. The change is motivated
by the need to distinguish between `structure`-defined structures,
structures, and non-recursive structures. Especially since #5783, which
enabled the `structure` command to define recursive structures,
"structure-like" has been easy to misunderstand.
Changes:
- Kernel: `is_structure_like()` -> `is_non_rec_structure()`
- `Lean.isStructureLike` -> `Lean.isNonRecStructure`
- `Lean.matchConstStructLike` -> `Lean.matchConstNonRecStructure`
- `Lean.getStructureLikeCtor?` -> `Lean.getNonRecStructureCtor?`
- `Lean.getStructureLikeNumFields` -> `Lean.getNonRecStructureNumFields`
- `Lean.Expr.proj`: extended and corrected documentation (note: despite
the fact that not every projection can be written as a recursor
application, I left in this claim since it seems good to document a
more-restrictive specification, and some users have requested the kernel
be more restrictive in this way)
Closes#5891
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
Renamed from tests/lean/run/structure_recursive.lean (Browse further)
