perf: store splat arg index in a single byte - #158251

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teor2345 wants to merge 13 commits into

rust-lang:mainfrom

teor2345:fn-arg-splat-exp-255-limit

Commits on Jun 22, 2026

Limit splat AST and FnDecl to 255 args
teor2345
committed
a8c1a22
Impl HIR FnSig for #[splat]
teor2345
committed
1ac6b6a
Impl HIR typeck for #[splat]
teor2345
committed
b9d2e39
Remove a leftover direct call to fn_ctxt.label_generic_mismatches
teor2345
committed
79c9709
Fix ICE in `label_fn_like` when splatted arg index is out of bounds

Ajay-singh1
authored and
teor2345
committed
b4f8649
Impl MIR lowering side-tables for #[splat]
teor2345
committed
bd1ba47
Impl actual MIR lowering for #[splat]
teor2345
committed
e5e24aa
Impl TypeInfo for splat
teor2345
committed
ec6ae17
Add UI tests for `#[splat]` unhappy path, generics, fn colors

Ajay-singh1
authored and
teor2345
committed
abca2d0
Add failing test for #[splat] with dyn AsRef<T> where T: Tuple

Ajay-singh1
authored and
teor2345
committed
ebcd34a
Add splat UI tests for 255 splatted arg limit
teor2345
committed
1d46627
Fix FnSig clippy
teor2345
authored
485ef9f
Fix FnDecl clippy
teor2345
authored
6298a47