Introduce ModernIdent type to unify macro 2.0 hygiene handling #144439

xizheyin · 2025-07-25T09:15:03Z

This pr introduce ModernIdent type to unify macro 2.0 hygiene handling

Added ModernIdent type. Wraps Ident and automatically calls normalize_to_macros_2_0()
Unified identifier normalization. Replaced scattered ident.normalize_to_macros_2_0() calls with ModernIdent::new(ident)

r? @petrochenkov

rustbot · 2025-07-25T09:15:09Z

HIR ty lowering was modified

cc @fmease

fee1-dead · 2025-07-25T16:29:23Z

What problem is this intended to solve? ModernIdent seems like a quite confusing name.

compiler/rustc_span/src/symbol.rs

compiler/rustc_hir_analysis/src/coherence/inherent_impls_overlap.rs

compiler/rustc_span/src/symbol.rs

compiler/rustc_resolve/src/macros.rs

compiler/rustc_resolve/src/lib.rs

compiler/rustc_resolve/src/build_reduced_graph.rs

compiler/rustc_resolve/src/late.rs

compiler/rustc_span/src/symbol.rs

petrochenkov · 2025-07-25T17:01:09Z

In general, I have mixed feelings about both this and MacroRulesNormalizedIdent.
It clearly can potentially catch some mistakes or inefficiencies (like it did in fn define_macro, I think), on the other hand it can only be used opportunistically because most places either do not care about the normalization, or care but the normalization should be different in different cases (like in rib.bindings, I guess).

xizheyin

In this version, I removed some unnecessary uses.
The modifications are mainly centered around two fields.

BindingKey::ident
Resolver::extern_prelude

compiler/rustc_span/src/symbol.rs

compiler/rustc_resolve/src/check_unused.rs

compiler/rustc_resolve/src/diagnostics.rs

compiler/rustc_resolve/src/lib.rs

xizheyin · 2025-08-04T03:14:00Z

I rebased it @rustbot ready

compiler/rustc_span/src/symbol.rs

compiler/rustc_resolve/src/build_reduced_graph.rs

compiler/rustc_resolve/src/lib.rs

Signed-off-by: xizheyin <[email protected]>

xizheyin

It's getting clearer.

@rustbot ready

compiler/rustc_resolve/src/build_reduced_graph.rs

compiler/rustc_resolve/src/imports.rs

compiler/rustc_span/src/symbol.rs

petrochenkov · 2025-08-06T13:29:38Z

@bors r+

bors · 2025-08-06T13:29:41Z

📌 Commit 6e7b9d5 has been approved by petrochenkov

It is now in the queue for this repository.

Introduce ModernIdent type to unify macro 2.0 hygiene handling This pr introduce ModernIdent type to unify macro 2.0 hygiene handling 1. Added ModernIdent type. Wraps Ident and automatically calls `normalize_to_macros_2_0()` 2. Unified identifier normalization. Replaced scattered ident.normalize_to_macros_2_0() calls with ModernIdent::new(ident) r? `@petrochenkov`

Introduce ModernIdent type to unify macro 2.0 hygiene handling This pr introduce ModernIdent type to unify macro 2.0 hygiene handling 1. Added ModernIdent type. Wraps Ident and automatically calls `normalize_to_macros_2_0()` 2. Unified identifier normalization. Replaced scattered ident.normalize_to_macros_2_0() calls with ModernIdent::new(ident) r? ``@petrochenkov``

Introduce ModernIdent type to unify macro 2.0 hygiene handling This pr introduce ModernIdent type to unify macro 2.0 hygiene handling 1. Added ModernIdent type. Wraps Ident and automatically calls `normalize_to_macros_2_0()` 2. Unified identifier normalization. Replaced scattered ident.normalize_to_macros_2_0() calls with ModernIdent::new(ident) r? ```@petrochenkov```

rustbot assigned petrochenkov Jul 25, 2025

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xizheyin commented Jul 25, 2025

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xizheyin force-pushed the symbol-rs branch from d2ad9c8 to 00a5785 Compare August 4, 2025 03:13

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Introduce ModernIdent type to unify macro 2.0 hygiene handling

6e7b9d5

Signed-off-by: xizheyin <[email protected]>

xizheyin force-pushed the symbol-rs branch from 00a5785 to 6e7b9d5 Compare August 6, 2025 13:20

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Zalathar mentioned this pull request Aug 7, 2025

Rollup of 21 pull requests #145034

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Zalathar mentioned this pull request Aug 7, 2025

Rollup of 20 pull requests #145039

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Introduce ModernIdent type to unify macro 2.0 hygiene handling #144439

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Introduce ModernIdent type to unify macro 2.0 hygiene handling #144439

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xizheyin commented Jul 25, 2025

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xizheyin commented Aug 4, 2025

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petrochenkov commented Aug 6, 2025

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