less clones and more cleanup for `rustc_builtin_macros` - #162234

Draft

cyrgani wants to merge 19 commits into

rust-lang:mainfrom

cyrgani:builtin-macros-clean-3

Commits on Sep 3, 2026

take `&Item` instead of `Annotatable` as derive macro input
cyrgani
committed
da1a5df
take `Box<Item>` instead of `Annotatable` as the `push` argument
cyrgani
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12beb43
several small cleanups
cyrgani
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6221469
remove one use of `expand_ext`
cyrgani
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a054d6f
dissolve the `cmp` subdirectory
cyrgani
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2bc7a87
split `bounds` module into `const_param_ty` and `copy` modules
cyrgani
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c186774
remove last `StaticFields` usage
cyrgani
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38adf7b
remove `StaticFields` and `IsTuple`
cyrgani
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3c3c3cd
make `expr_for_field` a closure
cyrgani
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3eea7c8

Commits on Sep 4, 2026

several small tweaks
cyrgani
committed
0890086
use a named struct instead of a 4-tuple
cyrgani
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41ca6ab
unify `span_bug` message format for unreachable substructures
cyrgani
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0da0c77
remove some clones via owned `Substructure`
cyrgani
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600ef0d
less clones in `cs_clone`
cyrgani
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49a7763
avoid collecting into intermediate `Vec`s
cyrgani
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3bc743c
remove `Bounds` in favor of `ast::Generics`
cyrgani
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b3310a2
avoid emitting empty `assert_fields_are_equal` methods
cyrgani
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785ad11
utilize `cx.pat_ident`
cyrgani
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68db54e
stop passing a `&MetaItem` around
cyrgani
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dc2a811