Jonathan Brouwer 6f13b5244c Rollup merge of #153795 - arferreira:turbofish-span-improvement, r=Kivooeo,eggyal ...

Point turbofish inference errors at the uninferred generic arg

Follow-up to rust-lang/rust#153751.

When a method call has a turbofish with an uninferred generic argument, point the diagnostic span at the specific `_` that couldn't be inferred instead of the method name.

Before:
```rust
LL |     S.f::<u32, _>(42);
   |       ^ cannot infer type of the type parameter `B`
```

After:
```rust
LL |     S.f::<u32, _>(42);
   |                ^ cannot infer type of the type parameter `B`
```

Path expressions (`None::<_>`, `foo::<_>()`) are not handled yet, that's a separate code path.

cc @eggyal

2026-03-17 21:20:02 +01:00

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assoc_const_unification

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auxiliary

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const_kind_expr

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abstract-const-as-cast-1.rs

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abstract-const-as-cast-2.fixed

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abstract-const-as-cast-2.rs

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abstract-const-as-cast-2.stderr

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abstract-const-as-cast-3.rs

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abstract-const-as-cast-3.stderr

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abstract-const-as-cast-4.rs

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abstract-consts-as-cast-5.rs

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abstract-consts-as-cast-5.stderr

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adt_wf_hang.rs

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adt_wf_hang.stderr

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array-size-in-generic-struct-param.full.stderr

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array-size-in-generic-struct-param.min.stderr

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array-size-in-generic-struct-param.rs

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associated-const.rs

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associated-consts.rs

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bad-multiply.rs

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bad-multiply.stderr

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cannot-convert-refree-ice-114463.rs

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cannot-convert-refree-ice-114463.stderr

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closures.rs

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closures.stderr

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const_eval_resolve_canonical.rs

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const-block-is-poly.rs

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const-block-is-poly.stderr

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const-generics-closure.rs

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const-generics-closure.stderr

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convert-refree-region-vid-ice-114464.rs

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convert-refree-region-vid-ice-114464.stderr

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cross_crate_predicate.rs

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cross_crate_predicate.stderr

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cross_crate.rs

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cross-crate-2.rs

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dependence_lint.full.stderr

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dependence_lint.gce.stderr

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dependence_lint.rs

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different-fn.rs

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different-fn.stderr

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division.rs

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dont-eagerly-error-in-is-const-evaluatable.rs

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double-opaque-parent-predicates.rs

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double-opaque-parent-predicates.stderr

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drop_impl.rs

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dyn-compatibility-err-ret.rs

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dyn-compatibility-err-ret.stderr

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dyn-compatibility-err-where-bounds.rs

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dyn-compatibility-err-where-bounds.stderr

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dyn-compatibility-ok-infer-err.rs

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dyn-compatibility-ok-infer-err.stderr

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dyn-compatibility-ok.rs

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elaborate-trait-pred.rs

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error_in_ty.rs

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error_in_ty.stderr

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eval-privacy.rs

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eval-privacy.stderr

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eval-try-unify.rs

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eval-try-unify.stderr

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evaluated-to-ambig.rs

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expected-type-of-closure-body-to-be-a-closure-or-coroutine-ice-113776.rs

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expected-type-of-closure-body-to-be-a-closure-or-coroutine-ice-113776.stderr

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failed-to-normalize-ice-issue-88421.rs

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failed-to-resolve-instance-ice-111667.rs

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feature-attribute-missing-in-dependent-crate-ice.rs

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feature-attribute-missing-in-dependent-crate-ice.stderr

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feature-gate-generic_const_exprs.rs

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feature-gate-generic_const_exprs.stderr

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fn_call.rs

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from-sig-fail.rs

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from-sig-fail.stderr

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from-sig.rs

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function-call.rs

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function-call.stderr

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ice-generics_of-no-entry-found-for-key-113017.rs

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ice-generics_of-no-entry-found-for-key-113017.stderr

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ice-predicates-of-no-entry-found-for-key-119275.rs

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ice-predicates-of-no-entry-found-for-key-119275.stderr

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impl-bounds.rs

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infer-too-generic.rs

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inline-const-in-const-generic-defaults.rs

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issue-62504.full.stderr

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issue-62504.min.stderr

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issue-62504.rs

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issue-69654.rs

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issue-69654.stderr

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issue-72787.min.stderr

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issue-72787.rs

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issue-72819-generic-in-const-eval.full.stderr

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issue-72819-generic-in-const-eval.min.stderr

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issue-72819-generic-in-const-eval.rs

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issue-73298.rs

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issue-73899.rs

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issue-74634.rs

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issue-74713.rs

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issue-74713.stderr

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issue-76595.rs

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issue-76595.stderr

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issue-79518-default_trait_method_normalization.rs

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issue-79518-default_trait_method_normalization.stderr

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issue-80561-incorrect-param-env.rs

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issue-80742.rs

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issue-80742.stderr

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issue-82268.rs

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issue-83765.rs

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issue-83765.stderr

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issue-83972.rs

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issue-84408.rs

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issue-84669.rs

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issue-85848.rs

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issue-85848.stderr

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issue-86710.rs

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issue-89851.rs

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issue-90847.rs

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issue-94293.rs

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issue-96699.rs

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issue-97047-ice-1.rs

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issue-97047-ice-1.stderr

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issue-97047-ice-2.rs

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issue-97047-ice-2.stderr

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issue-99647.rs

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issue-99705.rs

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issue-100217.rs

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issue-100360.rs

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issue-102074.rs

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issue-102768.rs

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issue-102768.stderr

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issue-105257.rs

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issue-105257.stderr

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issue-105608.rs

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issue-105608.stderr

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issue-109141.rs

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issue-109141.stderr

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less_than.rs

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let-bindings.rs

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let-bindings.stderr

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mismatched-gat-subst-kind.rs

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mismatched-gat-subst-kind.stderr

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needs_where_clause.rs

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needs_where_clause.stderr

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negative-coherence-ice-140609.rs

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nested_uneval_unification-1.rs

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nested_uneval_unification-2.rs

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nested-abstract-consts-1.rs

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nested-abstract-consts-2.rs

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no_dependence.rs

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no_where_clause.rs

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no_where_clause.stderr

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no-entry-found-for-key-ice-gce-nlb-113133.rs

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no-entry-found-for-key-ice-gce-nlb-113133.stderr

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non_local_anon_const_diagnostics.rs

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non_local_anon_const_diagnostics.stderr

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non-local-const.rs

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non-local-const.stderr

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normed_to_param_is_evaluatable.rs

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obligation-cause.rs

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obligation-cause.stderr

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opaque_type.rs

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opaque_type.stderr

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poly-const-uneval-ice-106423.rs

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post-analysis-user-facing-param-env.rs

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post-analysis-user-facing-param-env.stderr

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serializing_error_guaranteed.rs

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simple_fail.rs

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simple_fail.stderr

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single-satisfied-ConstEvaluatable-in-probe.rs

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size_of-dyn-trait-2.rs

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size_of-dyn-trait-2.stderr

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size_of-dyn-trait-3.rs

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size_of-dyn-trait-3.stderr

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size_of-dyn-trait.rs

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size_of-dyn-trait.stderr

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specialization-fuzzing-ice-133639.rs

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specialization-fuzzing-ice-133639.stderr

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subexprs_are_const_evalutable.rs

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trivial-anon-const-use-cases.full.stderr

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trivial-anon-const-use-cases.min.stderr

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trivial-anon-const-use-cases.rs

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ty-alias-substitution.rs

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type_mismatch.rs

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type_mismatch.stderr

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type-alias-bounds.neg.stderr

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type-alias-bounds.rs

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unevaluated-const-ice-119731.rs

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unevaluated-const-ice-119731.stderr

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unknown-alias-defkind-anonconst-ice-116710.rs

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unknown-alias-defkind-anonconst-ice-116710.stderr

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unop.rs

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unresolved_lifetimes_error.rs

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unresolved_lifetimes_error.stderr

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unused_expr.rs

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unused_expr.stderr

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unused-complex-default-expr.rs

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