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Rollup merge of #113599 - chenyukang:yukang-fix-use-maybe_body_owned_by, r=cjgillot

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Use maybe_body_owned_by for multiple suggestions

This is a continued work from https://github.com/rust-lang/rust/pull/113567

We have several other suggestions not working for closure, this PR use `maybe_body_owned_by` to fix them and add test cases for them.
This commit is contained in:
Matthias Krüger 2023-07-14 19:33:26 +02:00 • committed by GitHub
commit f6dbf7d69b
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15 changed files with 280 additions and 118 deletions
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37
compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs
View file

@ -363,21 +363,12 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
}
}
let hir = self.infcx.tcx.hir();
if let Some(hir::Node::Item(hir::Item {
kind: hir::ItemKind::Fn(_, _, body_id),
..
})) = hir.find(self.mir_hir_id())
&& let Some(hir::Node::Expr(expr)) = hir.find(body_id.hir_id)
{
if let Some(body_id) = hir.maybe_body_owned_by(self.mir_def_id()) {
let expr = hir.body(body_id).value;
let place = &self.move_data.move_paths[mpi].place;
let span = place.as_local()
.map(|local| self.body.local_decls[local].source_info.span);
let mut finder = ExpressionFinder {
expr_span: move_span,
expr: None,
pat: None,
parent_pat: None,
};
let span = place.as_local().map(|local| self.body.local_decls[local].source_info.span);
let mut finder =
ExpressionFinder { expr_span: move_span, expr: None, pat: None, parent_pat: None };
finder.visit_expr(expr);
if let Some(span) = span && let Some(expr) = finder.expr {
for (_, expr) in hir.parent_iter(expr.hir_id) {
@ -461,7 +452,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
} = move_spans {
// We already suggest cloning for these cases in `explain_captures`.
} else {
self.suggest_cloning(err, ty, move_span);
self.suggest_cloning(err, ty, expr, move_span);
}
}
}
@ -736,9 +727,21 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
true
}
fn suggest_cloning(&self, err: &mut Diagnostic, ty: Ty<'tcx>, span: Span) {
fn suggest_cloning(
&self,
err: &mut Diagnostic,
ty: Ty<'tcx>,
expr: &hir::Expr<'_>,
span: Span,
) {
let tcx = self.infcx.tcx;
// Try to find predicates on *generic params* that would allow copying `ty`
let suggestion =
if let Some(symbol) = tcx.hir().maybe_get_struct_pattern_shorthand_field(expr) {
format!(": {}.clone()", symbol)
} else {
".clone()".to_owned()
};
if let Some(clone_trait_def) = tcx.lang_items().clone_trait()
&& self.infcx
.type_implements_trait(
@ -751,7 +754,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
err.span_suggestion_verbose(
span.shrink_to_hi(),
"consider cloning the value if the performance cost is acceptable",
".clone()",
suggestion,
Applicability::MachineApplicable,
);
}

101
compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs
View file

@ -2,7 +2,6 @@ use rustc_errors::{Applicability, Diagnostic, DiagnosticBuilder, ErrorGuaranteed
use rustc_hir as hir;
use rustc_hir::intravisit::Visitor;
use rustc_hir::Node;
use rustc_middle::hir::map::Map;
use rustc_middle::mir::{Mutability, Place, PlaceRef, ProjectionElem};
use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_middle::{
@ -646,14 +645,8 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
}
let hir_map = self.infcx.tcx.hir();
let def_id = self.body.source.def_id();
let hir_id = hir_map.local_def_id_to_hir_id(def_id.as_local().unwrap());
let node = hir_map.find(hir_id);
let Some(hir::Node::Item(item)) = node else {
return;
};
let hir::ItemKind::Fn(.., body_id) = item.kind else {
return;
};
let Some(local_def_id) = def_id.as_local() else { return };
let Some(body_id) = hir_map.maybe_body_owned_by(local_def_id) else { return };
let body = self.infcx.tcx.hir().body(body_id);
let mut v = V { assign_span: span, err, ty, suggested: false };
@ -790,23 +783,12 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
// In the future, attempt in all path but initially for RHS of for_loop
fn suggest_similar_mut_method_for_for_loop(&self, err: &mut Diagnostic) {
use hir::{
BodyId, Expr,
Expr,
ExprKind::{Block, Call, DropTemps, Match, MethodCall},
HirId, ImplItem, ImplItemKind, Item, ItemKind,
};
fn maybe_body_id_of_fn(hir_map: Map<'_>, id: HirId) -> Option<BodyId> {
match hir_map.find(id) {
Some(Node::Item(Item { kind: ItemKind::Fn(_, _, body_id), .. }))
| Some(Node::ImplItem(ImplItem { kind: ImplItemKind::Fn(_, body_id), .. })) => {
Some(*body_id)
}
_ => None,
}
}
let hir_map = self.infcx.tcx.hir();
let mir_body_hir_id = self.mir_hir_id();
if let Some(fn_body_id) = maybe_body_id_of_fn(hir_map, mir_body_hir_id) {
if let Some(body_id) = hir_map.maybe_body_owned_by(self.mir_def_id()) {
if let Block(
hir::Block {
expr:
@ -840,7 +822,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
..
},
_,
) = hir_map.body(fn_body_id).value.kind
) = hir_map.body(body_id).value.kind
{
let opt_suggestions = self
.infcx
@ -1102,46 +1084,45 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
}
let hir_map = self.infcx.tcx.hir();
let def_id = self.body.source.def_id();
let hir_id = hir_map.local_def_id_to_hir_id(def_id.expect_local());
let node = hir_map.find(hir_id);
let hir_id = if let Some(hir::Node::Item(item)) = node
&& let hir::ItemKind::Fn(.., body_id) = item.kind
{
let body = hir_map.body(body_id);
let mut v = BindingFinder {
span: err_label_span,
hir_id: None,
let hir_id = if let Some(local_def_id) = def_id.as_local() &&
let Some(body_id) = hir_map.maybe_body_owned_by(local_def_id)
{
let body = hir_map.body(body_id);
let mut v = BindingFinder {
span: err_label_span,
hir_id: None,
};
v.visit_body(body);
v.hir_id
} else {
None
};
v.visit_body(body);
v.hir_id
} else {
None
};
if let Some(hir_id) = hir_id
&& let Some(hir::Node::Local(local)) = hir_map.find(hir_id)
{
let (changing, span, sugg) = match local.ty {
Some(ty) => ("changing", ty.span, message),
None => (
"specifying",
local.pat.span.shrink_to_hi(),
format!(": {message}"),
),
};
err.span_suggestion_verbose(
span,
format!("consider {changing} this binding's type"),
sugg,
Applicability::HasPlaceholders,
);
} else {
err.span_label(
err_label_span,
format!(
"consider changing this binding's type to be: `{message}`"
),
);
}
{
let (changing, span, sugg) = match local.ty {
Some(ty) => ("changing", ty.span, message),
None => (
"specifying",
local.pat.span.shrink_to_hi(),
format!(": {message}"),
),
};
err.span_suggestion_verbose(
span,
format!("consider {changing} this binding's type"),
sugg,
Applicability::HasPlaceholders,
);
} else {
err.span_label(
err_label_span,
format!(
"consider changing this binding's type to be: `{message}`"
),
);
}
}
None => {}
}