use rustc_hir as hir;
use rustc_hir::def::{CtorKind, Namespace};
use rustc_hir::GeneratorKind;
-use rustc_infer::infer::TyCtxtInferExt;
+use rustc_infer::infer::{LateBoundRegionConversionTime, TyCtxtInferExt};
use rustc_middle::mir::tcx::PlaceTy;
use rustc_middle::mir::{
AggregateKind, Constant, FakeReadCause, Field, Local, LocalInfo, LocalKind, Location, Operand,
use rustc_span::def_id::LocalDefId;
use rustc_span::{symbol::sym, Span, Symbol, DUMMY_SP};
use rustc_target::abi::VariantIdx;
-use rustc_trait_selection::traits::type_known_to_meet_bound_modulo_regions;
+use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt;
+use rustc_trait_selection::traits::{
+ type_known_to_meet_bound_modulo_regions, Obligation, ObligationCause,
+};
use super::borrow_set::BorrowData;
use super::MirBorrowckCtxt;
move_prefix: &str,
) {
let message = format!(
- "{}move occurs because {} has type `{}`, which does not implement the `Copy` trait",
- move_prefix, place_desc, ty,
+ "{move_prefix}move occurs because {place_desc} has type `{ty}`, which does not implement the `Copy` trait",
);
if let Some(span) = span {
err.span_label(span, message);
BorrowedContentSource::OverloadedDeref(ty) => ty
.ty_adt_def()
.and_then(|adt| match tcx.get_diagnostic_name(adt.did())? {
- name @ (sym::Rc | sym::Arc) => Some(format!("an `{}`", name)),
+ name @ (sym::Rc | sym::Arc) => Some(format!("an `{name}`")),
_ => None,
})
- .unwrap_or_else(|| format!("dereference of `{}`", ty)),
- BorrowedContentSource::OverloadedIndex(ty) => format!("index of `{}`", ty),
+ .unwrap_or_else(|| format!("dereference of `{ty}`")),
+ BorrowedContentSource::OverloadedIndex(ty) => format!("index of `{ty}`"),
}
}
BorrowedContentSource::OverloadedDeref(ty) => ty
.ty_adt_def()
.and_then(|adt| match tcx.get_diagnostic_name(adt.did())? {
- name @ (sym::Rc | sym::Arc) => Some(format!("an `{}`", name)),
+ name @ (sym::Rc | sym::Arc) => Some(format!("an `{name}`")),
_ => None,
})
- .unwrap_or_else(|| format!("dereference of `{}`", ty)),
- BorrowedContentSource::OverloadedIndex(ty) => format!("an index of `{}`", ty),
+ .unwrap_or_else(|| format!("dereference of `{ty}`")),
+ BorrowedContentSource::OverloadedIndex(ty) => format!("an index of `{ty}`"),
}
}
if let UseSpans::FnSelfUse { var_span, fn_call_span, fn_span, kind } = move_spans {
let place_name = self
.describe_place(moved_place.as_ref())
- .map(|n| format!("`{}`", n))
+ .map(|n| format!("`{n}`"))
.unwrap_or_else(|| "value".to_owned());
match kind {
CallKind::FnCall { fn_trait_id, .. }
err.span_label(
fn_call_span,
&format!(
- "{} {}moved due to this call{}",
- place_name, partially_str, loop_message
+ "{place_name} {partially_str}moved due to this call{loop_message}",
),
);
err.span_note(
err.span_label(
fn_call_span,
&format!(
- "{} {}moved due to usage in operator{}",
- place_name, partially_str, loop_message
+ "{place_name} {partially_str}moved due to usage in operator{loop_message}",
),
);
if self.fn_self_span_reported.insert(fn_span) {
);
}
}
- CallKind::Normal { self_arg, desugaring, method_did } => {
+ CallKind::Normal { self_arg, desugaring, method_did, method_substs } => {
let self_arg = self_arg.unwrap();
+ let tcx = self.infcx.tcx;
if let Some((CallDesugaringKind::ForLoopIntoIter, _)) = desugaring {
- let ty = moved_place.ty(self.body, self.infcx.tcx).ty;
- let suggest = match self.infcx.tcx.get_diagnostic_item(sym::IntoIterator) {
+ let ty = moved_place.ty(self.body, tcx).ty;
+ let suggest = match tcx.get_diagnostic_item(sym::IntoIterator) {
Some(def_id) => {
let infcx = self.infcx.tcx.infer_ctxt().build();
type_known_to_meet_bound_modulo_regions(
&infcx,
self.param_env,
- infcx.tcx.mk_imm_ref(
- infcx.tcx.lifetimes.re_erased,
- infcx.tcx.erase_regions(ty),
- ),
+ tcx.mk_imm_ref(tcx.lifetimes.re_erased, tcx.erase_regions(ty)),
def_id,
DUMMY_SP,
)
err.span_suggestion_verbose(
move_span.shrink_to_lo(),
&format!(
- "consider iterating over a slice of the `{}`'s content to \
+ "consider iterating over a slice of the `{ty}`'s content to \
avoid moving into the `for` loop",
- ty,
),
"&",
Applicability::MaybeIncorrect,
err.span_label(
fn_call_span,
&format!(
- "{} {}moved due to this implicit call to `.into_iter()`{}",
- place_name, partially_str, loop_message
+ "{place_name} {partially_str}moved due to this implicit call to `.into_iter()`{loop_message}",
),
);
// If the moved place was a `&mut` ref, then we can
&format!(
"consider creating a fresh reborrow of {} here",
self.describe_place(moved_place.as_ref())
- .map(|n| format!("`{}`", n))
+ .map(|n| format!("`{n}`"))
.unwrap_or_else(|| "the mutable reference".to_string()),
),
"&mut *",
err.span_label(
fn_call_span,
&format!(
- "{} {}moved due to this method call{}",
- place_name, partially_str, loop_message
+ "{place_name} {partially_str}moved due to this method call{loop_message}",
),
);
+
+ let infcx = tcx.infer_ctxt().build();
+ // Erase and shadow everything that could be passed to the new infcx.
+ let ty = tcx.erase_regions(moved_place.ty(self.body, tcx).ty);
+ let method_substs = tcx.erase_regions(method_substs);
+
+ if let ty::Adt(def, substs) = ty.kind()
+ && Some(def.did()) == tcx.lang_items().pin_type()
+ && let ty::Ref(_, _, hir::Mutability::Mut) = substs.type_at(0).kind()
+ && let self_ty = infcx.replace_bound_vars_with_fresh_vars(
+ fn_call_span,
+ LateBoundRegionConversionTime::FnCall,
+ tcx.fn_sig(method_did).subst(tcx, method_substs).input(0),
+ )
+ && infcx.can_eq(self.param_env, ty, self_ty).is_ok()
+ {
+ err.span_suggestion_verbose(
+ fn_call_span.shrink_to_lo(),
+ "consider reborrowing the `Pin` instead of moving it",
+ "as_mut().".to_string(),
+ Applicability::MaybeIncorrect,
+ );
+ }
+ if let Some(clone_trait) = tcx.lang_items().clone_trait()
+ && let trait_ref = tcx.mk_trait_ref(clone_trait, [ty])
+ && let o = Obligation::new(
+ tcx,
+ ObligationCause::dummy(),
+ self.param_env,
+ ty::Binder::dummy(trait_ref),
+ )
+ && infcx.predicate_must_hold_modulo_regions(&o)
+ {
+ err.span_suggestion_verbose(
+ fn_call_span.shrink_to_lo(),
+ "you can `clone` the value and consume it, but this might not be \
+ your desired behavior",
+ "clone().".to_string(),
+ Applicability::MaybeIncorrect,
+ );
+ }
}
- let tcx = self.infcx.tcx;
// Avoid pointing to the same function in multiple different
// error messages.
if span != DUMMY_SP && self.fn_self_span_reported.insert(self_arg.span) {
if move_span != span || !loop_message.is_empty() {
err.span_label(
move_span,
- format!("value {}moved{} here{}", partially_str, move_msg, loop_message),
+ format!("value {partially_str}moved{move_msg} here{loop_message}"),
);
}
// If the move error occurs due to a loop, don't show
if loop_message.is_empty() {
move_spans.var_span_label(
err,
- format!("variable {}moved due to use{}", partially_str, move_spans.describe()),
+ format!("variable {partially_str}moved due to use{}", move_spans.describe()),
"moved",
);
}
projects / rust.git / blobdiff