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Auto merge of #96745 - ehuss:even-more-attribute-validation, r=cjgillot

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Visit attributes in more places.

This adds 3 loosely related changes (I can split PRs if desired):

- Attribute checking on pattern struct fields.
- Attribute checking on struct expression fields.
- Lint level visiting on pattern struct fields, struct expression fields, and generic parameters.

There are still some lints which ignore lint levels in various positions. This is a consequence of how the lints themselves are implemented. For example, lint levels on associated consts don't work with `unused_braces`.
This commit is contained in:
bors 2022-08-15 05:50:54 +00:00
commit 86a0a18179
1 changed files with 14 additions and 12 deletions
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26
clippy_lints/src/dereference.rs
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@ -2,7 +2,7 @@ use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_hir_and_then};
use clippy_utils::source::{snippet_with_applicability, snippet_with_context};
use clippy_utils::sugg::has_enclosing_paren;
use clippy_utils::ty::{expr_sig, peel_mid_ty_refs, ty_sig, variant_of_res};
use clippy_utils::{get_parent_expr, is_lint_allowed, path_to_local, walk_to_expr_usage};
use clippy_utils::{get_parent_expr, get_parent_expr_for_hir, is_lint_allowed, path_to_local, walk_to_expr_usage};
use rustc_ast::util::parser::{PREC_POSTFIX, PREC_PREFIX};
use rustc_data_structures::fx::FxIndexMap;
use rustc_errors::Applicability;
@ -699,6 +699,19 @@ fn walk_parents<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> (Position, &
Some(ty_auto_deref_stability(cx, output, precedence).position_for_result(cx))
},
Node::ExprField(field) if field.span.ctxt() == ctxt => match get_parent_expr_for_hir(cx, field.hir_id) {
Some(Expr {
hir_id,
kind: ExprKind::Struct(path, ..),
..
}) => variant_of_res(cx, cx.qpath_res(path, *hir_id))
.and_then(|variant| variant.fields.iter().find(|f| f.name == field.ident.name))
.map(|field_def| {
ty_auto_deref_stability(cx, cx.tcx.type_of(field_def.did), precedence).position_for_arg()
}),
_ => None,
},
Node::Expr(parent) if parent.span.ctxt() == ctxt => match parent.kind {
ExprKind::Ret(_) => {
let owner_id = cx.tcx.hir().body_owner(cx.enclosing_body.unwrap());
@ -788,17 +801,6 @@ fn walk_parents<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> (Position, &
}
})
},
ExprKind::Struct(path, fields, _) => {
let variant = variant_of_res(cx, cx.qpath_res(path, parent.hir_id));
fields
.iter()
.find(|f| f.expr.hir_id == child_id)
.zip(variant)
.and_then(|(field, variant)| variant.fields.iter().find(|f| f.name == field.ident.name))
.map(|field| {
ty_auto_deref_stability(cx, cx.tcx.type_of(field.did), precedence).position_for_arg()
})
},
ExprKind::Field(child, name) if child.hir_id == e.hir_id => Some(Position::FieldAccess(name.name)),
ExprKind::Unary(UnOp::Deref, child) if child.hir_id == e.hir_id => Some(Position::Deref),
ExprKind::Match(child, _, MatchSource::TryDesugar | MatchSource::AwaitDesugar)