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Auto merge of #120730 - estebank:confusable-api, r=oli-obk 

Provide suggestions through `rustc_confusables` annotations

Help with common API confusion, like asking for `push` when the data structure really has `append`.

```
error[E0599]: no method named `size` found for struct `Vec<{integer}>` in the current scope
  --> $DIR/rustc_confusables_std_cases.rs:17:7
   |
LL |     x.size();
   |       ^^^^
   |
help: you might have meant to use `len`
   |
LL |     x.len();
   |       ~~~
help: there is a method with a similar name
   |
LL |     x.resize();
   |       ~~~~~~
```

Fix #59450 (we can open subsequent tickets for specific cases).

Fix #108437:

```
error[E0599]: `Option<{integer}>` is not an iterator
   --> f101.rs:3:9
    |
3   |     opt.flat_map(|val| Some(val));
    |         ^^^^^^^^ `Option<{integer}>` is not an iterator
    |
   ::: /home/gh-estebank/rust/library/core/src/option.rs:571:1
    |
571 | pub enum Option<T> {
    | ------------------ doesn't satisfy `Option<{integer}>: Iterator`
    |
    = note: the following trait bounds were not satisfied:
            `Option<{integer}>: Iterator`
            which is required by `&mut Option<{integer}>: Iterator`
help: you might have meant to use `and_then`
    |
3   |     opt.and_then(|val| Some(val));
    |         ~~~~~~~~
```

On type error of method call arguments, look at confusables for suggestion. Fix #87212:

```
error[E0308]: mismatched types
    --> f101.rs:8:18
     |
8    |     stuff.append(Thing);
     |           ------ ^^^^^ expected `&mut Vec<Thing>`, found `Thing`
     |           |
     |           arguments to this method are incorrect
     |
     = note: expected mutable reference `&mut Vec<Thing>`
                           found struct `Thing`
note: method defined here
    --> /home/gh-estebank/rust/library/alloc/src/vec/mod.rs:2025:12
     |
2025 |     pub fn append(&mut self, other: &mut Self) {
     |            ^^^^^^
help: you might have meant to use `push`
     |
8    |     stuff.push(Thing);
     |           ~~~~
```
This commit is contained in:
bors 2024-02-23 00:42:56 +00:00
parent 397937d812 91d0b371ef
commit a28d221a4b
72 changed files with 833 additions and 196 deletions
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126
compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs
View File

@ -1,7 +1,11 @@
use crate::coercion::CoerceMany;
use crate::errors::SuggestPtrNullMut;
use crate::fn_ctxt::arg_matrix::{ArgMatrix, Compatibility, Error, ExpectedIdx, ProvidedIdx};
use crate::fn_ctxt::infer::FnCall;
use crate::gather_locals::Declaration;
use crate::method::probe::IsSuggestion;
use crate::method::probe::Mode::MethodCall;
use crate::method::probe::ProbeScope::TraitsInScope;
use crate::method::MethodCallee;
use crate::TupleArgumentsFlag::*;
use crate::{errors, Expectation::*};
@ -451,7 +455,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
call_expr: &'tcx hir::Expr<'tcx>,
) -> ErrorGuaranteed {
// Next, let's construct the error
let (error_span, full_call_span, call_name, is_method) = match &call_expr.kind {
let (error_span, call_ident, full_call_span, call_name, is_method) = match &call_expr.kind {
hir::ExprKind::Call(
hir::Expr { hir_id, span, kind: hir::ExprKind::Path(qpath), .. },
_,
@ -463,12 +467,14 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
CtorOf::Struct => "struct",
CtorOf::Variant => "enum variant",
};
(call_span, *span, name, false)
(call_span, None, *span, name, false)
} else {
(call_span, *span, "function", false)
(call_span, None, *span, "function", false)
}
}
hir::ExprKind::Call(hir::Expr { span, .. }, _) => (call_span, *span, "function", false),
hir::ExprKind::Call(hir::Expr { span, .. }, _) => {
(call_span, None, *span, "function", false)
}
hir::ExprKind::MethodCall(path_segment, _, _, span) => {
let ident_span = path_segment.ident.span;
let ident_span = if let Some(args) = path_segment.args {
@ -476,7 +482,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
} else {
ident_span
};
(*span, ident_span, "method", true)
(*span, Some(path_segment.ident), ident_span, "method", true)
}
k => span_bug!(call_span, "checking argument types on a non-call: `{:?}`", k),
};
@ -530,6 +536,104 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
let callee_ty = callee_expr
.and_then(|callee_expr| self.typeck_results.borrow().expr_ty_adjusted_opt(callee_expr));
// Obtain another method on `Self` that have similar name.
let similar_assoc = |call_name: Ident| -> Option<(ty::AssocItem, ty::FnSig<'_>)> {
if let Some(callee_ty) = callee_ty
&& let Ok(Some(assoc)) = self.probe_op(
call_name.span,
MethodCall,
Some(call_name),
None,
IsSuggestion(true),
callee_ty.peel_refs(),
callee_expr.unwrap().hir_id,
TraitsInScope,
|mut ctxt| ctxt.probe_for_similar_candidate(),
)
&& let ty::AssocKind::Fn = assoc.kind
&& assoc.fn_has_self_parameter
{
let args = self.infcx.fresh_args_for_item(call_name.span, assoc.def_id);
let fn_sig = tcx.fn_sig(assoc.def_id).instantiate(tcx, args);
let fn_sig =
self.instantiate_binder_with_fresh_vars(call_name.span, FnCall, fn_sig);
Some((assoc, fn_sig));
}
None
};
let suggest_confusable = |err: &mut DiagnosticBuilder<'_>| {
let Some(call_name) = call_ident else {
return;
};
let Some(callee_ty) = callee_ty else {
return;
};
let input_types: Vec<Ty<'_>> = provided_arg_tys.iter().map(|(ty, _)| *ty).collect();
// Check for other methods in the following order
// - methods marked as `rustc_confusables` with the provided arguments
// - methods with the same argument type/count and short levenshtein distance
// - methods marked as `rustc_confusables` (done)
// - methods with short levenshtein distance
// Look for commonly confusable method names considering arguments.
if let Some(_name) = self.confusable_method_name(
err,
callee_ty.peel_refs(),
call_name,
Some(input_types.clone()),
) {
return;
}
// Look for method names with short levenshtein distance, considering arguments.
if let Some((assoc, fn_sig)) = similar_assoc(call_name)
&& fn_sig.inputs()[1..]
.iter()
.zip(input_types.iter())
.all(|(expected, found)| self.can_coerce(*expected, *found))
&& fn_sig.inputs()[1..].len() == input_types.len()
{
err.span_suggestion_verbose(
call_name.span,
format!("you might have meant to use `{}`", assoc.name),
assoc.name,
Applicability::MaybeIncorrect,
);
return;
}
// Look for commonly confusable method names disregarding arguments.
if let Some(_name) =
self.confusable_method_name(err, callee_ty.peel_refs(), call_name, None)
{
return;
}
// Look for similarly named methods with levenshtein distance with the right
// number of arguments.
if let Some((assoc, fn_sig)) = similar_assoc(call_name)
&& fn_sig.inputs()[1..].len() == input_types.len()
{
err.span_note(
tcx.def_span(assoc.def_id),
format!(
"there's is a method with similar name `{}`, but the arguments don't match",
assoc.name,
),
);
return;
}
// Fallthrough: look for similarly named methods with levenshtein distance.
if let Some((assoc, _)) = similar_assoc(call_name) {
err.span_note(
tcx.def_span(assoc.def_id),
format!(
"there's is a method with similar name `{}`, but their argument count \
doesn't match",
assoc.name,
),
);
return;
}
};
// A "softer" version of the `demand_compatible`, which checks types without persisting them,
// and treats error types differently
// This will allow us to "probe" for other argument orders that would likely have been correct
@ -694,6 +798,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
Some(mismatch_idx),
is_method,
);
suggest_confusable(&mut err);
return err.emit();
}
}
@ -718,7 +823,10 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
if cfg!(debug_assertions) {
span_bug!(error_span, "expected errors from argument matrix");
} else {
return tcx.dcx().emit_err(errors::ArgMismatchIndeterminate { span: error_span });
let mut err =
tcx.dcx().create_err(errors::ArgMismatchIndeterminate { span: error_span });
suggest_confusable(&mut err);
return err.emit();
}
}
@ -733,7 +841,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
let trace =
mk_trace(provided_span, formal_and_expected_inputs[*expected_idx], provided_ty);
if !matches!(trace.cause.as_failure_code(*e), FailureCode::Error0308) {
reported = Some(self.err_ctxt().report_and_explain_type_error(trace, *e).emit());
let mut err = self.err_ctxt().report_and_explain_type_error(trace, *e);
suggest_confusable(&mut err);
reported = Some(err.emit());
return false;
}
true
@ -802,6 +912,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
Some(expected_idx.as_usize()),
is_method,
);
suggest_confusable(&mut err);
return err.emit();
}
@ -829,6 +940,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
.with_code(err_code.to_owned())
};
suggest_confusable(&mut err);
// As we encounter issues, keep track of what we want to provide for the suggestion
let mut labels = vec![];
// If there is a single error, we give a specific suggestion; otherwise, we change to

26
compiler/rustc_hir_typeck/src/method/probe.rs
View File

@ -54,7 +54,7 @@ pub use self::PickKind::*;
#[derive(Clone, Copy, Debug)]
pub struct IsSuggestion(pub bool);
struct ProbeContext<'a, 'tcx> {
pub(crate) struct ProbeContext<'a, 'tcx> {
fcx: &'a FnCtxt<'a, 'tcx>,
span: Span,
mode: Mode,
@ -355,7 +355,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
.unwrap()
}
fn probe_op<OP, R>(
pub(crate) fn probe_op<OP, R>(
&'a self,
span: Span,
mode: Mode,
@ -1750,7 +1750,9 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
/// Similarly to `probe_for_return_type`, this method attempts to find the best matching
/// candidate method where the method name may have been misspelled. Similarly to other
/// edit distance based suggestions, we provide at most one such suggestion.
fn probe_for_similar_candidate(&mut self) -> Result<Option<ty::AssocItem>, MethodError<'tcx>> {
pub(crate) fn probe_for_similar_candidate(
&mut self,
) -> Result<Option<ty::AssocItem>, MethodError<'tcx>> {
debug!("probing for method names similar to {:?}", self.method_name);
self.probe(|_| {
@ -1766,6 +1768,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
);
pcx.allow_similar_names = true;
pcx.assemble_inherent_candidates();
pcx.assemble_extension_candidates_for_all_traits();
let method_names = pcx.candidate_method_names(|_| true);
pcx.allow_similar_names = false;
@ -1775,6 +1778,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
pcx.reset();
pcx.method_name = Some(method_name);
pcx.assemble_inherent_candidates();
pcx.assemble_extension_candidates_for_all_traits();
pcx.pick_core().and_then(|pick| pick.ok()).map(|pick| pick.item)
})
.collect();
@ -1942,7 +1946,21 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
let hir_id = self.fcx.tcx.local_def_id_to_hir_id(local_def_id);
let attrs = self.fcx.tcx.hir().attrs(hir_id);
for attr in attrs {
let sym::doc = attr.name_or_empty() else {
if sym::doc == attr.name_or_empty() {
} else if sym::rustc_confusables == attr.name_or_empty() {
let Some(confusables) = attr.meta_item_list() else {
continue;
};
// #[rustc_confusables("foo", "bar"))]
for n in confusables {
if let Some(lit) = n.lit()
&& name.as_str() == lit.symbol.as_str()
{
return true;
}
}
continue;
} else {
continue;
};
let Some(values) = attr.meta_item_list() else {

248
compiler/rustc_hir_typeck/src/method/suggest.rs
View File

@ -23,6 +23,7 @@ use rustc_hir::PatKind::Binding;
use rustc_hir::PathSegment;
use rustc_hir::{ExprKind, Node, QPath};
use rustc_infer::infer::{
self,
type_variable::{TypeVariableOrigin, TypeVariableOriginKind},
RegionVariableOrigin,
};
@ -274,7 +275,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
.span_if_local(def_id)
.unwrap_or_else(|| self.tcx.def_span(def_id));
err.span_label(sp, format!("private {kind} defined here"));
self.suggest_valid_traits(&mut err, out_of_scope_traits, true);
self.suggest_valid_traits(&mut err, item_name, out_of_scope_traits, true);
err.emit();
}
@ -1209,32 +1210,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
err.note(format!(
"the {item_kind} was found for\n{type_candidates}{additional_types}"
));
} else {
'outer: for inherent_impl_did in
self.tcx.inherent_impls(adt.did()).into_iter().flatten()
{
for inherent_method in
self.tcx.associated_items(inherent_impl_did).in_definition_order()
{
if let Some(attr) = self
.tcx
.get_attr(inherent_method.def_id, sym::rustc_confusables)
&& let Some(candidates) = parse_confusables(attr)
&& candidates.contains(&item_name.name)
{
err.span_suggestion_verbose(
item_name.span,
format!(
"you might have meant to use `{}`",
inherent_method.name
),
inherent_method.name,
Applicability::MaybeIncorrect,
);
break 'outer;
}
}
}
}
}
} else {
@ -1260,6 +1235,24 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
label_span_not_found(&mut err);
}
let confusable_suggested = self.confusable_method_name(
&mut err,
rcvr_ty,
item_name,
args.map(|args| {
args.iter()
.map(|expr| {
self.node_ty_opt(expr.hir_id).unwrap_or_else(|| {
self.next_ty_var(TypeVariableOrigin {
kind: TypeVariableOriginKind::MiscVariable,
span: expr.span,
})
})
})
.collect()
}),
);
// Don't suggest (for example) `expr.field.clone()` if `expr.clone()`
// can't be called due to `typeof(expr): Clone` not holding.
if unsatisfied_predicates.is_empty() {
@ -1361,31 +1354,17 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
} else if let Some(similar_candidate) = similar_candidate {
// Don't emit a suggestion if we found an actual method
// that had unsatisfied trait bounds
if unsatisfied_predicates.is_empty() {
let def_kind = similar_candidate.kind.as_def_kind();
// Methods are defined within the context of a struct and their first parameter is always self,
// which represents the instance of the struct the method is being called on
// Associated functions don’t take self as a parameter and
// they are not methods because they don’t have an instance of the struct to work with.
if def_kind == DefKind::AssocFn && similar_candidate.fn_has_self_parameter {
err.span_suggestion(
span,
"there is a method with a similar name",
similar_candidate.name,
Applicability::MaybeIncorrect,
);
} else {
err.span_suggestion(
span,
format!(
"there is {} {} with a similar name",
self.tcx.def_kind_descr_article(def_kind, similar_candidate.def_id),
self.tcx.def_kind_descr(def_kind, similar_candidate.def_id)
),
similar_candidate.name,
Applicability::MaybeIncorrect,
);
}
if unsatisfied_predicates.is_empty()
// ...or if we already suggested that name because of `rustc_confusable` annotation.
&& Some(similar_candidate.name) != confusable_suggested
{
self.find_likely_intended_associated_item(
&mut err,
similar_candidate,
span,
args,
mode,
);
}
}
// If an appropriate error source is not found, check method chain for possible candiates
@ -1437,6 +1416,146 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
Some(err)
}
fn find_likely_intended_associated_item(
&self,
err: &mut DiagnosticBuilder<'_>,
similar_candidate: ty::AssocItem,
span: Span,
args: Option<&'tcx [hir::Expr<'tcx>]>,
mode: Mode,
) {
let tcx = self.tcx;
let def_kind = similar_candidate.kind.as_def_kind();
let an = self.tcx.def_kind_descr_article(def_kind, similar_candidate.def_id);
let msg = format!(
"there is {an} {} `{}` with a similar name",
self.tcx.def_kind_descr(def_kind, similar_candidate.def_id),
similar_candidate.name,
);
// Methods are defined within the context of a struct and their first parameter
// is always `self`, which represents the instance of the struct the method is
// being called on Associated functions don’t take self as a parameter and they are
// not methods because they don’t have an instance of the struct to work with.
if def_kind == DefKind::AssocFn {
let ty_args = self.infcx.fresh_args_for_item(span, similar_candidate.def_id);
let fn_sig = tcx.fn_sig(similar_candidate.def_id).instantiate(tcx, ty_args);
let fn_sig = self.instantiate_binder_with_fresh_vars(span, infer::FnCall, fn_sig);
if similar_candidate.fn_has_self_parameter {
if let Some(args) = args
&& fn_sig.inputs()[1..].len() == args.len()
{
// We found a method with the same number of arguments as the method
// call expression the user wrote.
err.span_suggestion_verbose(
span,
msg,
similar_candidate.name,
Applicability::MaybeIncorrect,
);
} else {
// We found a method but either the expression is not a method call or
// the argument count didn't match.
err.span_help(
tcx.def_span(similar_candidate.def_id),
format!(
"{msg}{}",
if let None = args { "" } else { ", but with different arguments" },
),
);
}
} else if let Some(args) = args
&& fn_sig.inputs().len() == args.len()
{
// We have fn call expression and the argument count match the associated
// function we found.
err.span_suggestion_verbose(
span,
msg,
similar_candidate.name,
Applicability::MaybeIncorrect,
);
} else {
err.span_help(tcx.def_span(similar_candidate.def_id), msg);
}
} else if let Mode::Path = mode
&& args.unwrap_or(&[]).is_empty()
{
// We have an associated item syntax and we found something that isn't an fn.
err.span_suggestion_verbose(
span,
msg,
similar_candidate.name,
Applicability::MaybeIncorrect,
);
} else {
// The expression is a function or method call, but the item we found is an
// associated const or type.
err.span_help(tcx.def_span(similar_candidate.def_id), msg);
}
}
pub(crate) fn confusable_method_name(
&self,
err: &mut DiagnosticBuilder<'_>,
rcvr_ty: Ty<'tcx>,
item_name: Ident,
call_args: Option<Vec<Ty<'tcx>>>,
) -> Option<Symbol> {
if let ty::Adt(adt, adt_args) = rcvr_ty.kind() {
for inherent_impl_did in self.tcx.inherent_impls(adt.did()).into_iter().flatten() {
for inherent_method in
self.tcx.associated_items(inherent_impl_did).in_definition_order()
{
if let Some(attr) =
self.tcx.get_attr(inherent_method.def_id, sym::rustc_confusables)
&& let Some(candidates) = parse_confusables(attr)
&& candidates.contains(&item_name.name)
&& let ty::AssocKind::Fn = inherent_method.kind
{
let args =
ty::GenericArgs::identity_for_item(self.tcx, inherent_method.def_id)
.rebase_onto(
self.tcx,
inherent_method.container_id(self.tcx),
adt_args,
);
let fn_sig =
self.tcx.fn_sig(inherent_method.def_id).instantiate(self.tcx, args);
let fn_sig = self.instantiate_binder_with_fresh_vars(
item_name.span,
infer::FnCall,
fn_sig,
);
if let Some(ref args) = call_args
&& fn_sig.inputs()[1..]
.iter()
.zip(args.into_iter())
.all(|(expected, found)| self.can_coerce(*expected, *found))
&& fn_sig.inputs()[1..].len() == args.len()
{
err.span_suggestion_verbose(
item_name.span,
format!("you might have meant to use `{}`", inherent_method.name),
inherent_method.name,
Applicability::MaybeIncorrect,
);
return Some(inherent_method.name);
} else if let None = call_args {
err.span_note(
self.tcx.def_span(inherent_method.def_id),
format!(
"you might have meant to use method `{}`",
inherent_method.name,
),
);
return Some(inherent_method.name);
}
}
}
}
}
None
}
fn note_candidates_on_method_error(
&self,
rcvr_ty: Ty<'tcx>,
@ -2768,6 +2887,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
fn suggest_valid_traits(
&self,
err: &mut DiagnosticBuilder<'_>,
item_name: Ident,
valid_out_of_scope_traits: Vec<DefId>,
explain: bool,
) -> bool {
@ -2786,9 +2906,16 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
err.help("items from traits can only be used if the trait is in scope");
}
let msg = format!(
"the following {traits_are} implemented but not in scope; \
perhaps add a `use` for {one_of_them}:",
traits_are = if candidates.len() == 1 { "trait is" } else { "traits are" },
"{this_trait_is} implemented but not in scope; perhaps you want to import \
{one_of_them}",
this_trait_is = if candidates.len() == 1 {
format!(
"trait `{}` which provides `{item_name}` is",
self.tcx.item_name(candidates[0]),
)
} else {
format!("the following traits which provide `{item_name}` are")
},
one_of_them = if candidates.len() == 1 { "it" } else { "one of them" },
);
@ -2996,7 +3123,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
}
}
}
if self.suggest_valid_traits(err, valid_out_of_scope_traits, true) {
if self.suggest_valid_traits(err, item_name, valid_out_of_scope_traits, true) {
return;
}
@ -3282,7 +3409,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
[] => {}
[trait_info] if trait_info.def_id.is_local() => {
if impls_trait(trait_info.def_id) {
self.suggest_valid_traits(err, vec![trait_info.def_id], false);
self.suggest_valid_traits(err, item_name, vec![trait_info.def_id], false);
} else {
err.subdiagnostic(
self.dcx(),
@ -3309,7 +3436,12 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
));
for (i, trait_info) in trait_infos.iter().enumerate() {
if impls_trait(trait_info.def_id) {
self.suggest_valid_traits(err, vec![trait_info.def_id], false);
self.suggest_valid_traits(
err,
item_name,
vec![trait_info.def_id],
false,
);
}
msg.push_str(&format!(
"\ncandidate #{}: `{}`",

2
compiler/rustc_middle/src/ty/print/pretty.rs
View File

@ -2929,7 +2929,7 @@ define_print_and_forward_display! {
ty::ExistentialTraitRef<'tcx> {
// Use a type that can't appear in defaults of type parameters.
let dummy_self = Ty::new_fresh(cx.tcx(),0);
let dummy_self = Ty::new_fresh(cx.tcx(), 0);
let trait_ref = self.with_self_ty(cx.tcx(), dummy_self);
p!(print(trait_ref.print_only_trait_path()))
}

2
library/alloc/src/collections/binary_heap/mod.rs
View File

@ -607,6 +607,7 @@ impl<T: Ord, A: Allocator> BinaryHeap<T, A> {
/// occurs when capacity is exhausted and needs a resize. The resize cost
/// has been amortized in the previous figures.
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("append", "put")]
pub fn push(&mut self, item: T) {
let old_len = self.len();
self.data.push(item);
@ -1264,6 +1265,7 @@ impl<T, A: Allocator> BinaryHeap<T, A> {
/// ```
#[must_use]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("length", "size")]
pub fn len(&self) -> usize {
self.data.len()
}

3
library/alloc/src/collections/btree/map.rs
View File

@ -979,6 +979,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
/// assert_eq!(map[&37], "c");
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("push", "put", "set")]
pub fn insert(&mut self, key: K, value: V) -> Option<V>
where
K: Ord,
@ -1041,6 +1042,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
/// assert_eq!(map.remove(&1), None);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("delete", "take")]
pub fn remove<Q: ?Sized>(&mut self, key: &Q) -> Option<V>
where
K: Borrow<Q> + Ord,
@ -2495,6 +2497,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
issue = "71835",
implied_by = "const_btree_new"
)]
#[rustc_confusables("length", "size")]
pub const fn len(&self) -> usize {
self.length
}

3
library/alloc/src/collections/btree/map/entry.rs
View File

@ -347,6 +347,7 @@ impl<'a, K: Ord, V, A: Allocator + Clone> VacantEntry<'a, K, V, A> {
/// assert_eq!(map["poneyland"], 37);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("push", "put")]
pub fn insert(mut self, value: V) -> &'a mut V {
let out_ptr = match self.handle {
None => {
@ -524,6 +525,7 @@ impl<'a, K: Ord, V, A: Allocator + Clone> OccupiedEntry<'a, K, V, A> {
/// assert_eq!(map["poneyland"], 15);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("push", "put")]
pub fn insert(&mut self, value: V) -> V {
mem::replace(self.get_mut(), value)
}
@ -546,6 +548,7 @@ impl<'a, K: Ord, V, A: Allocator + Clone> OccupiedEntry<'a, K, V, A> {
/// // println!("{}", map["poneyland"]);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("delete", "take")]
pub fn remove(self) -> V {
self.remove_kv().1
}

5
library/alloc/src/collections/btree/set.rs
View File

@ -790,6 +790,7 @@ impl<T, A: Allocator + Clone> BTreeSet<T, A> {
/// ```
#[must_use]
#[stable(feature = "map_first_last", since = "1.66.0")]
#[rustc_confusables("front")]
pub fn first(&self) -> Option<&T>
where
T: Ord,
@ -816,6 +817,7 @@ impl<T, A: Allocator + Clone> BTreeSet<T, A> {
/// ```
#[must_use]
#[stable(feature = "map_first_last", since = "1.66.0")]
#[rustc_confusables("back")]
pub fn last(&self) -> Option<&T>
where
T: Ord,
@ -896,6 +898,7 @@ impl<T, A: Allocator + Clone> BTreeSet<T, A> {
/// assert_eq!(set.len(), 1);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("push", "put")]
pub fn insert(&mut self, value: T) -> bool
where
T: Ord,
@ -919,6 +922,7 @@ impl<T, A: Allocator + Clone> BTreeSet<T, A> {
/// assert_eq!(set.get(&[][..]).unwrap().capacity(), 10);
/// ```
#[stable(feature = "set_recovery", since = "1.9.0")]
#[rustc_confusables("swap")]
pub fn replace(&mut self, value: T) -> Option<T>
where
T: Ord,
@ -1152,6 +1156,7 @@ impl<T, A: Allocator + Clone> BTreeSet<T, A> {
issue = "71835",
implied_by = "const_btree_new"
)]
#[rustc_confusables("length", "size")]
pub const fn len(&self) -> usize {
self.map.len()
}

10
library/alloc/src/collections/linked_list.rs
View File

@ -656,6 +656,7 @@ impl<T, A: Allocator> LinkedList<T, A> {
#[inline]
#[must_use]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("length", "size")]
pub fn len(&self) -> usize {
self.len
}
@ -740,6 +741,7 @@ impl<T, A: Allocator> LinkedList<T, A> {
#[inline]
#[must_use]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("first")]
pub fn front(&self) -> Option<&T> {
unsafe { self.head.as_ref().map(|node| &node.as_ref().element) }
}
@ -890,6 +892,7 @@ impl<T, A: Allocator> LinkedList<T, A> {
/// assert_eq!(3, *d.back().unwrap());
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("push", "append")]
pub fn push_back(&mut self, elt: T) {
let node = Box::new_in(Node::new(elt), &self.alloc);
let node_ptr = NonNull::from(Box::leak(node));
@ -1004,6 +1007,7 @@ impl<T, A: Allocator> LinkedList<T, A> {
/// assert_eq!(d.remove(0), 1);
/// ```
#[unstable(feature = "linked_list_remove", issue = "69210")]
#[rustc_confusables("delete", "take")]
pub fn remove(&mut self, at: usize) -> T {
let len = self.len();
assert!(at < len, "Cannot remove at an index outside of the list bounds");
@ -1478,6 +1482,7 @@ impl<'a, T, A: Allocator> Cursor<'a, T, A> {
/// or None if the list is empty.
#[must_use]
#[unstable(feature = "linked_list_cursors", issue = "58533")]
#[rustc_confusables("first")]
pub fn front(&self) -> Option<&'a T> {
self.list.front()
}
@ -1486,6 +1491,7 @@ impl<'a, T, A: Allocator> Cursor<'a, T, A> {
/// or None if the list is empty.
#[must_use]
#[unstable(feature = "linked_list_cursors", issue = "58533")]
#[rustc_confusables("last")]
pub fn back(&self) -> Option<&'a T> {
self.list.back()
}
@ -1788,6 +1794,7 @@ impl<'a, T, A: Allocator> CursorMut<'a, T, A> {
///
/// This operation should compute in *O*(1) time.
#[unstable(feature = "linked_list_cursors", issue = "58533")]
#[rustc_confusables("push", "append")]
pub fn push_back(&mut self, elt: T) {
// Safety: We know that `push_back` does not change the position in
// memory of other nodes. This ensures that `self.current` remains
@ -1834,6 +1841,7 @@ impl<'a, T, A: Allocator> CursorMut<'a, T, A> {
///
/// This operation should compute in *O*(1) time.
#[unstable(feature = "linked_list_cursors", issue = "58533")]
#[rustc_confusables("pop")]
pub fn pop_back(&mut self) -> Option<T> {
if self.list.is_empty() {
None
@ -1854,6 +1862,7 @@ impl<'a, T, A: Allocator> CursorMut<'a, T, A> {
/// or None if the list is empty.
#[must_use]
#[unstable(feature = "linked_list_cursors", issue = "58533")]
#[rustc_confusables("first")]
pub fn front(&self) -> Option<&T> {
self.list.front()
}
@ -1870,6 +1879,7 @@ impl<'a, T, A: Allocator> CursorMut<'a, T, A> {
/// or None if the list is empty.
#[must_use]
#[unstable(feature = "linked_list_cursors", issue = "58533")]
#[rustc_confusables("last")]
pub fn back(&self) -> Option<&T> {
self.list.back()
}

5
library/alloc/src/collections/vec_deque/mod.rs
View File

@ -1209,6 +1209,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
/// assert_eq!(deque.len(), 1);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("length", "size")]
pub fn len(&self) -> usize {
self.len
}
@ -1491,6 +1492,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
/// assert_eq!(d.front(), Some(&1));
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("first")]
pub fn front(&self) -> Option<&T> {
self.get(0)
}
@ -1535,6 +1537,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
/// assert_eq!(d.back(), Some(&2));
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("last")]
pub fn back(&self) -> Option<&T> {
self.get(self.len.wrapping_sub(1))
}
@ -1654,6 +1657,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
/// assert_eq!(3, *buf.back().unwrap());
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("push", "put", "append")]
pub fn push_back(&mut self, value: T) {
if self.is_full() {
self.grow();
@ -1813,6 +1817,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
/// assert_eq!(buf, [1, 3]);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("delete", "take")]
pub fn remove(&mut self, index: usize) -> Option<T> {
if self.len <= index {
return None;

4
library/alloc/src/string.rs
View File

@ -1049,6 +1049,7 @@ impl String {
#[cfg(not(no_global_oom_handling))]
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("append", "push")]
pub fn push_str(&mut self, string: &str) {
self.vec.extend_from_slice(string.as_bytes())
}
@ -1445,6 +1446,7 @@ impl String {
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("delete", "take")]
pub fn remove(&mut self, idx: usize) -> char {
let ch = match self[idx..].chars().next() {
Some(ch) => ch,
@ -1639,6 +1641,7 @@ impl String {
#[cfg(not(no_global_oom_handling))]
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("set")]
pub fn insert(&mut self, idx: usize, ch: char) {
assert!(self.is_char_boundary(idx));
let mut bits = [0; 4];
@ -1738,6 +1741,7 @@ impl String {
#[inline]
#[must_use]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("length", "size")]
pub fn len(&self) -> usize {
self.vec.len()
}

3
library/alloc/src/vec/mod.rs
View File

@ -1554,6 +1554,7 @@ impl<T, A: Allocator> Vec<T, A> {
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[track_caller]
#[rustc_confusables("delete", "take")]
pub fn remove(&mut self, index: usize) -> T {
#[cold]
#[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]
@ -1915,6 +1916,7 @@ impl<T, A: Allocator> Vec<T, A> {
#[cfg(not(no_global_oom_handling))]
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("push_back", "put", "append")]
pub fn push(&mut self, value: T) {
// This will panic or abort if we would allocate > isize::MAX bytes
// or if the length increment would overflow for zero-sized types.
@ -2141,6 +2143,7 @@ impl<T, A: Allocator> Vec<T, A> {
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("length", "size")]
pub fn len(&self) -> usize {
self.len
}

2
library/core/src/cell.rs
View File

@ -471,6 +471,7 @@ impl<T> Cell<T> {
/// ```
#[inline]
#[stable(feature = "move_cell", since = "1.17.0")]
#[rustc_confusables("swap")]
pub fn replace(&self, val: T) -> T {
// SAFETY: This can cause data races if called from a separate thread,
// but `Cell` is `!Sync` so this won't happen.
@ -862,6 +863,7 @@ impl<T> RefCell<T> {
#[inline]
#[stable(feature = "refcell_replace", since = "1.24.0")]
#[track_caller]
#[rustc_confusables("swap")]
pub fn replace(&self, t: T) -> T {
mem::replace(&mut *self.borrow_mut(), t)
}

1
library/core/src/option.rs
View File

@ -1403,6 +1403,7 @@ impl<T> Option<T> {
#[doc(alias = "flatmap")]
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("flat_map", "flatmap")]
pub fn and_then<U, F>(self, f: F) -> Option<U>
where
F: FnOnce(T) -> Option<U>,

1
library/core/src/result.rs
View File

@ -1315,6 +1315,7 @@ impl<T, E> Result<T, E> {
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("flat_map", "flatmap")]
pub fn and_then<U, F: FnOnce(T) -> Result<U, E>>(self, op: F) -> Result<U, E> {
match self {
Ok(t) => op(t),

1
library/proc_macro/src/bridge/scoped_cell.rs
View File

@ -25,6 +25,7 @@ impl<T: LambdaL> ScopedCell<T> {
/// running `f`, which gets the old value, mutably.
/// The old value will be restored after `f` exits, even
/// by panic, including modifications made to it by `f`.
#[rustc_confusables("swap")]
pub fn replace<'a, R>(
&self,
replacement: <T as ApplyL<'a>>::Out,

2
library/std/src/collections/hash/map.rs
View File

@ -1101,6 +1101,7 @@ where
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("push", "append")]
pub fn insert(&mut self, k: K, v: V) -> Option<V> {
self.base.insert(k, v)
}
@ -1155,6 +1156,7 @@ where
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("delete", "take")]
pub fn remove<Q: ?Sized>(&mut self, k: &Q) -> Option<V>
where
K: Borrow<Q>,

3
library/std/src/collections/hash/set.rs
View File

@ -885,6 +885,7 @@ where
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("push", "append")]
pub fn insert(&mut self, value: T) -> bool {
self.base.insert(value)
}
@ -906,6 +907,7 @@ where
/// ```
#[inline]
#[stable(feature = "set_recovery", since = "1.9.0")]
#[rustc_confusables("swap")]
pub fn replace(&mut self, value: T) -> Option<T> {
self.base.replace(value)
}
@ -930,6 +932,7 @@ where
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("delete", "take")]
pub fn remove<Q: ?Sized>(&mut self, value: &Q) -> bool
where
T: Borrow<Q>,

1
library/std/src/ffi/os_str.rs
View File

@ -255,6 +255,7 @@ impl OsString {
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
#[rustc_confusables("append", "put")]
pub fn push<T: AsRef<OsStr>>(&mut self, s: T) {
self.inner.push_slice(&s.as_ref().inner)
}

1
library/std/src/path.rs
View File

@ -1270,6 +1270,7 @@ impl PathBuf {
/// assert_eq!(path, PathBuf::from("/etc"));
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_confusables("append", "put")]
pub fn push<P: AsRef<Path>>(&mut self, path: P) {
self._push(path.as_ref())
}

2
library/std/src/thread/local.rs
View File

@ -435,6 +435,7 @@ impl<T: 'static> LocalKey<Cell<T>> {
/// assert_eq!(X.replace(3), 2);
/// ```
#[stable(feature = "local_key_cell_methods", since = "1.73.0")]
#[rustc_confusables("swap")]
pub fn replace(&'static self, value: T) -> T {
self.with(|cell| cell.replace(value))
}
@ -606,6 +607,7 @@ impl<T: 'static> LocalKey<RefCell<T>> {
/// X.with_borrow(|v| assert_eq!(*v, vec![1, 2, 3]));
/// ```
#[stable(feature = "local_key_cell_methods", since = "1.73.0")]
#[rustc_confusables("swap")]
pub fn replace(&'static self, value: T) -> T {
self.with(|cell| cell.replace(value))
}

30
tests/ui/associated-item/associated-item-enum.stderr
View File

@ -5,10 +5,12 @@ LL | enum Enum { Variant }
| --------- variant or associated item `mispellable` not found for this enum
...
LL | Enum::mispellable();
| ^^^^^^^^^^^
| |
| variant or associated item not found in `Enum`
| help: there is an associated function with a similar name: `misspellable`
| ^^^^^^^^^^^ variant or associated item not found in `Enum`
|
help: there is an associated function `misspellable` with a similar name
|
LL | Enum::misspellable();
| ~~~~~~~~~~~~
error[E0599]: no variant or associated item named `mispellable_trait` found for enum `Enum` in the current scope
--> $DIR/associated-item-enum.rs:18:11
@ -17,10 +19,12 @@ LL | enum Enum { Variant }
| --------- variant or associated item `mispellable_trait` not found for this enum
...
LL | Enum::mispellable_trait();
| ^^^^^^^^^^^^^^^^^
| |
| variant or associated item not found in `Enum`
| help: there is an associated function with a similar name: `misspellable`
| ^^^^^^^^^^^^^^^^^ variant or associated item not found in `Enum`
|
help: there is an associated function `misspellable_trait` with a similar name
|
LL | Enum::misspellable_trait();
| ~~~~~~~~~~~~~~~~~~
error[E0599]: no variant or associated item named `MISPELLABLE` found for enum `Enum` in the current scope
--> $DIR/associated-item-enum.rs:19:11
@ -29,10 +33,12 @@ LL | enum Enum { Variant }
| --------- variant or associated item `MISPELLABLE` not found for this enum
...
LL | Enum::MISPELLABLE;
| ^^^^^^^^^^^
| |
| variant or associated item not found in `Enum`
| help: there is an associated constant with a similar name: `MISSPELLABLE`
| ^^^^^^^^^^^ variant or associated item not found in `Enum`
|
help: there is an associated constant `MISSPELLABLE` with a similar name
|
LL | Enum::MISSPELLABLE;
| ~~~~~~~~~~~~
error: aborting due to 3 previous errors

2
tests/ui/async-await/in-trait/dont-project-to-specializable-projection.stderr
View File

@ -30,7 +30,7 @@ LL | match fut.as_mut().poll(ctx) {
= note: the method is available for `Pin<&mut impl Future<Output = ()>>` here
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Future` which provides `poll` is implemented but not in scope; perhaps you want to import it
|
LL + use std::future::Future;
|

4
tests/ui/atomic-from-mut-not-available.stderr
View File

@ -7,6 +7,10 @@ LL | core::sync::atomic::AtomicU64::from_mut(&mut 0u64);
note: if you're trying to build a new `AtomicU64`, consider using `AtomicU64::new` which returns `AtomicU64`
--> $SRC_DIR/core/src/sync/atomic.rs:LL:COL
= note: this error originates in the macro `atomic_int` (in Nightly builds, run with -Z macro-backtrace for more info)
help: there is an associated function `from` with a similar name
|
LL | core::sync::atomic::AtomicU64::from(&mut 0u64);
| ~~~~
error: aborting due to 1 previous error

4
tests/ui/attributes/rustc_confusables.rs
View File

@ -11,7 +11,7 @@ fn main() {
let x = BTreeSet {};
x.inser();
//~^ ERROR no method named
//~| HELP there is a method with a similar name
//~| HELP there is a method `insert` with a similar name
x.foo();
//~^ ERROR no method named
x.push();
@ -21,7 +21,7 @@ fn main() {
//~^ ERROR no method named
x.pulled();
//~^ ERROR no method named
//~| HELP there is a method with a similar name
//~| HELP you might have meant to use `pull`
}
struct Bar;

14
tests/ui/attributes/rustc_confusables.stderr
View File

@ -31,7 +31,12 @@ error[E0599]: no method named `inser` found for struct `rustc_confusables_across
--> $DIR/rustc_confusables.rs:12:7
|
LL | x.inser();
| ^^^^^ help: there is a method with a similar name: `insert`
| ^^^^^
|
help: there is a method `insert` with a similar name
|
LL | x.insert();
| ~~~~~~
error[E0599]: no method named `foo` found for struct `rustc_confusables_across_crate::BTreeSet` in the current scope
--> $DIR/rustc_confusables.rs:15:7
@ -60,7 +65,12 @@ error[E0599]: no method named `pulled` found for struct `rustc_confusables_acros
--> $DIR/rustc_confusables.rs:22:7
|
LL | x.pulled();
| ^^^^^^ help: there is a method with a similar name: `pull`
| ^^^^^^
|
help: you might have meant to use `pull`
|
LL | x.pull();
| ~~~~
error: aborting due to 9 previous errors

26
tests/ui/attributes/rustc_confusables_std_cases.rs Normal file
View File

@ -0,0 +1,26 @@
use std::collections::BTreeSet;
use std::collections::VecDeque;
fn main() {
let mut x = BTreeSet::new();
x.push(1); //~ ERROR E0599
//~^ HELP you might have meant to use `insert`
let mut x = Vec::new();
x.push_back(1); //~ ERROR E0599
//~^ HELP you might have meant to use `push`
let mut x = VecDeque::new();
x.push(1); //~ ERROR E0599
//~^ HELP you might have meant to use `push_back`
let mut x = vec![1, 2, 3];
x.length(); //~ ERROR E0599
//~^ HELP you might have meant to use `len`
x.size(); //~ ERROR E0599
//~^ HELP you might have meant to use `len`
//~| HELP there is a method `resize` with a similar name
x.append(42); //~ ERROR E0308
//~^ HELP you might have meant to use `push`
String::new().push(""); //~ ERROR E0308
//~^ HELP you might have meant to use `push_str`
String::new().append(""); //~ ERROR E0599
//~^ HELP you might have meant to use `push_str`
}

104
tests/ui/attributes/rustc_confusables_std_cases.stderr Normal file
View File

@ -0,0 +1,104 @@
error[E0599]: no method named `push` found for struct `BTreeSet` in the current scope
--> $DIR/rustc_confusables_std_cases.rs:6:7
|
LL | x.push(1);
| ^^^^ method not found in `BTreeSet<_>`
|
help: you might have meant to use `insert`
|
LL | x.insert(1);
| ~~~~~~
error[E0599]: no method named `push_back` found for struct `Vec<_>` in the current scope
--> $DIR/rustc_confusables_std_cases.rs:9:7
|
LL | x.push_back(1);
| ^^^^^^^^^ method not found in `Vec<_>`
|
help: you might have meant to use `push`
|
LL | x.push(1);
| ~~~~
error[E0599]: no method named `push` found for struct `VecDeque` in the current scope
--> $DIR/rustc_confusables_std_cases.rs:12:7
|
LL | x.push(1);
| ^^^^ method not found in `VecDeque<_>`
|
help: you might have meant to use `push_back`
|
LL | x.push_back(1);
| ~~~~~~~~~
error[E0599]: no method named `length` found for struct `Vec<{integer}>` in the current scope
--> $DIR/rustc_confusables_std_cases.rs:15:7
|
LL | x.length();
| ^^^^^^
|
help: you might have meant to use `len`
|
LL | x.len();
| ~~~
error[E0599]: no method named `size` found for struct `Vec<{integer}>` in the current scope
--> $DIR/rustc_confusables_std_cases.rs:17:7
|
LL | x.size();
| ^^^^
|
help: there is a method `resize` with a similar name, but with different arguments
--> $SRC_DIR/alloc/src/vec/mod.rs:LL:COL
help: you might have meant to use `len`
|
LL | x.len();
| ~~~
error[E0308]: mismatched types
--> $DIR/rustc_confusables_std_cases.rs:20:14
|
LL | x.append(42);
| ------ ^^ expected `&mut Vec<{integer}>`, found integer
| |
| arguments to this method are incorrect
|
= note: expected mutable reference `&mut Vec<{integer}>`
found type `{integer}`
note: method defined here
--> $SRC_DIR/alloc/src/vec/mod.rs:LL:COL
help: you might have meant to use `push`
|
LL | x.push(42);
| ~~~~
error[E0308]: mismatched types
--> $DIR/rustc_confusables_std_cases.rs:22:24
|
LL | String::new().push("");
| ---- ^^ expected `char`, found `&str`
| |
| arguments to this method are incorrect
|
note: method defined here
--> $SRC_DIR/alloc/src/string.rs:LL:COL
help: you might have meant to use `push_str`
|
LL | String::new().push_str("");
| ~~~~~~~~
error[E0599]: no method named `append` found for struct `String` in the current scope
--> $DIR/rustc_confusables_std_cases.rs:24:19
|
LL | String::new().append("");
| ^^^^^^ method not found in `String`
|
help: you might have meant to use `push_str`
|
LL | String::new().push_str("");
| ~~~~~~~~
error: aborting due to 8 previous errors
Some errors have detailed explanations: E0308, E0599.
For more information about an error, try `rustc --explain E0308`.

4
tests/ui/auto-ref-slice-plus-ref.stderr
View File

@ -2,7 +2,7 @@ error[E0599]: no method named `test_mut` found for struct `Vec<{integer}>` in th
--> $DIR/auto-ref-slice-plus-ref.rs:7:7
|
LL | a.test_mut();
| ^^^^^^^^ help: there is a method with a similar name: `get_mut`
| ^^^^^^^^
|
= help: items from traits can only be used if the trait is implemented and in scope
note: `MyIter` defines an item `test_mut`, perhaps you need to implement it
@ -10,6 +10,8 @@ note: `MyIter` defines an item `test_mut`, perhaps you need to implement it
|
LL | trait MyIter {
| ^^^^^^^^^^^^
help: there is a method `get_mut` with a similar name, but with different arguments
--> $SRC_DIR/core/src/slice/mod.rs:LL:COL
error[E0599]: no method named `test` found for struct `Vec<{integer}>` in the current scope
--> $DIR/auto-ref-slice-plus-ref.rs:8:7

7
tests/ui/block-result/issue-3563.stderr
View File

@ -2,7 +2,12 @@ error[E0599]: no method named `b` found for reference `&Self` in the current sco
--> $DIR/issue-3563.rs:3:17
|
LL | || self.b()
| ^ help: there is a method with a similar name: `a`
| ^
|
help: there is a method `a` with a similar name
|
LL | || self.a()
| ~
error: aborting due to 1 previous error

2
tests/ui/coherence/coherence_inherent.stderr
View File

@ -5,7 +5,7 @@ LL | s.the_fn();
| ^^^^^^ method not found in `&TheStruct`
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `TheTrait` which provides `the_fn` is implemented but not in scope; perhaps you want to import it
|
LL + use Lib::TheTrait;
|

2
tests/ui/coherence/coherence_inherent_cc.stderr
View File

@ -5,7 +5,7 @@ LL | s.the_fn();
| ^^^^^^ method not found in `&TheStruct`
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `TheTrait` which provides `the_fn` is implemented but not in scope; perhaps you want to import it
|
LL + use coherence_inherent_cc_lib::TheTrait;
|

4
tests/ui/confuse-field-and-method/issue-33784.stderr
View File

@ -8,6 +8,10 @@ help: to call the function stored in `closure`, surround the field access with p
|
LL | (p.closure)();
| + +
help: there is a method `clone` with a similar name
|
LL | p.clone();
| ~~~~~
error[E0599]: no method named `fn_ptr` found for reference `&&Obj<{closure@$DIR/issue-33784.rs:25:43: 25:45}>` in the current scope
--> $DIR/issue-33784.rs:29:7

6
tests/ui/hygiene/no_implicit_prelude.stderr
View File

@ -20,11 +20,13 @@ LL | fn f() { ::bar::m!(); }
| ----------- in this macro invocation
...
LL | ().clone()
| ^^^^^ method not found in `()`
| ^^^^^
|
= help: items from traits can only be used if the trait is in scope
help: there is a method `clone_from` with a similar name, but with different arguments
--> $SRC_DIR/core/src/clone.rs:LL:COL
= note: this error originates in the macro `::bar::m` (in Nightly builds, run with -Z macro-backtrace for more info)
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Clone` which provides `clone` is implemented but not in scope; perhaps you want to import it
|
LL + use std::clone::Clone;
|

2
tests/ui/hygiene/trait_items.stderr
View File

@ -12,7 +12,7 @@ LL | pub macro m() { ().f() }
|
= help: items from traits can only be used if the trait is in scope
= note: this error originates in the macro `::baz::m` (in Nightly builds, run with -Z macro-backtrace for more info)
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `T` which provides `f` is implemented but not in scope; perhaps you want to import it
|
LL + use foo::T;
|

48
tests/ui/impl-trait/no-method-suggested-traits.stderr
View File

@ -2,10 +2,10 @@ error[E0599]: no method named `method` found for type `u32` in the current scope
--> $DIR/no-method-suggested-traits.rs:23:10
|
LL | 1u32.method();
| ^^^^^^ method not found in `u32`
| ^^^^^^
|
= help: items from traits can only be used if the trait is in scope
help: the following traits are implemented but not in scope; perhaps add a `use` for one of them:
help: the following traits which provide `method` are implemented but not in scope; perhaps you want to import one of them
|
LL + use foo::Bar;
|
@ -15,15 +15,19 @@ LL + use no_method_suggested_traits::foo::PubPub;
|
LL + use no_method_suggested_traits::qux::PrivPub;
|
help: there is a method `method2` with a similar name
|
LL | 1u32.method2();
| ~~~~~~~
error[E0599]: no method named `method` found for struct `Rc<&mut Box<&u32>>` in the current scope
--> $DIR/no-method-suggested-traits.rs:26:44
|
LL | std::rc::Rc::new(&mut Box::new(&1u32)).method();
| ^^^^^^ method not found in `Rc<&mut Box<&u32>>`
| ^^^^^^
|
= help: items from traits can only be used if the trait is in scope
help: the following traits are implemented but not in scope; perhaps add a `use` for one of them:
help: the following traits which provide `method` are implemented but not in scope; perhaps you want to import one of them
|
LL + use foo::Bar;
|
@ -33,6 +37,10 @@ LL + use no_method_suggested_traits::foo::PubPub;
|
LL + use no_method_suggested_traits::qux::PrivPub;
|
help: there is a method `method2` with a similar name
|
LL | std::rc::Rc::new(&mut Box::new(&1u32)).method2();
| ~~~~~~~
error[E0599]: no method named `method` found for type `char` in the current scope
--> $DIR/no-method-suggested-traits.rs:30:9
@ -41,31 +49,39 @@ LL | fn method(&self) {}
| ------ the method is available for `char` here
...
LL | 'a'.method();
| ^^^^^^ method not found in `char`
| ^^^^^^
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Bar` which provides `method` is implemented but not in scope; perhaps you want to import it
|
LL + use foo::Bar;
|
help: there is a method `method2` with a similar name
|
LL | 'a'.method2();
| ~~~~~~~
error[E0599]: no method named `method` found for struct `Rc<&mut Box<&char>>` in the current scope
--> $DIR/no-method-suggested-traits.rs:32:43
|
LL | std::rc::Rc::new(&mut Box::new(&'a')).method();
| ^^^^^^ method not found in `Rc<&mut Box<&char>>`
| ^^^^^^
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Bar` which provides `method` is implemented but not in scope; perhaps you want to import it
|
LL + use foo::Bar;
|
help: there is a method `method2` with a similar name
|
LL | std::rc::Rc::new(&mut Box::new(&'a')).method2();
| ~~~~~~~
error[E0599]: no method named `method` found for type `i32` in the current scope
--> $DIR/no-method-suggested-traits.rs:35:10
|
LL | 1i32.method();
| ^^^^^^ method not found in `i32`
| ^^^^^^
|
::: $DIR/auxiliary/no_method_suggested_traits.rs:8:12
|
@ -73,22 +89,30 @@ LL | fn method(&self) {}
| ------ the method is available for `i32` here
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `PubPub` which provides `method` is implemented but not in scope; perhaps you want to import it
|
LL + use no_method_suggested_traits::foo::PubPub;
|
help: there is a method `method3` with a similar name
|
LL | 1i32.method3();
| ~~~~~~~
error[E0599]: no method named `method` found for struct `Rc<&mut Box<&i32>>` in the current scope
--> $DIR/no-method-suggested-traits.rs:37:44
|
LL | std::rc::Rc::new(&mut Box::new(&1i32)).method();
| ^^^^^^ method not found in `Rc<&mut Box<&i32>>`
| ^^^^^^
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `PubPub` which provides `method` is implemented but not in scope; perhaps you want to import it
|
LL + use no_method_suggested_traits::foo::PubPub;
|
help: there is a method `method3` with a similar name
|
LL | std::rc::Rc::new(&mut Box::new(&1i32)).method3();
| ~~~~~~~
error[E0599]: no method named `method` found for struct `Foo` in the current scope
--> $DIR/no-method-suggested-traits.rs:40:9

2
tests/ui/impl-trait/where-allowed.stderr
View File

@ -395,6 +395,8 @@ error[E0599]: no function or associated item named `into_vec` found for slice `[
LL | vec![vec![0; 10], vec![12; 7], vec![8; 3]]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function or associated item not found in `[_]`
|
help: there is an associated function `to_vec` with a similar name
--> $SRC_DIR/alloc/src/slice.rs:LL:COL
= note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0053]: method `in_trait_impl_return` has an incompatible type for trait

2
tests/ui/imports/overlapping_pub_trait.rs
View File

@ -4,7 +4,7 @@
* This crate declares two public paths, `m::Tr` and `prelude::_`. Make sure we prefer the former.
*/
extern crate overlapping_pub_trait_source;
//~^ HELP the following trait is implemented but not in scope; perhaps add a `use` for it:
//~^ HELP trait `Tr` which provides `method` is implemented but not in scope; perhaps you want to import it
//~| SUGGESTION overlapping_pub_trait_source::m::Tr
fn main() {

2
tests/ui/imports/overlapping_pub_trait.stderr
View File

@ -10,7 +10,7 @@ LL | pub trait Tr { fn method(&self); }
| ------ the method is available for `S` here
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Tr` which provides `method` is implemented but not in scope; perhaps you want to import it
|
LL + use overlapping_pub_trait_source::m::Tr;
|

2
tests/ui/imports/unnamed_pub_trait.rs
View File

@ -5,7 +5,7 @@
* importing it by name, and instead we suggest importing it by glob.
*/
extern crate unnamed_pub_trait_source;
//~^ HELP the following trait is implemented but not in scope; perhaps add a `use` for it:
//~^ HELP trait `Tr` which provides `method` is implemented but not in scope; perhaps you want to import it
//~| SUGGESTION unnamed_pub_trait_source::prelude::*; // trait Tr
fn main() {

2
tests/ui/imports/unnamed_pub_trait.stderr
View File

@ -10,7 +10,7 @@ LL | pub trait Tr { fn method(&self); }
| ------ the method is available for `S` here
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Tr` which provides `method` is implemented but not in scope; perhaps you want to import it
|
LL + use unnamed_pub_trait_source::prelude::*; // trait Tr
|

2
tests/ui/issues/issue-10465.stderr
View File

@ -5,7 +5,7 @@ LL | b.foo();
| ^^^ method not found in `&B`
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `A` which provides `foo` is implemented but not in scope; perhaps you want to import it
|
LL + use a::A;
|

16
tests/ui/issues/issue-28344.stderr
View File

@ -22,10 +22,10 @@ error[E0599]: no function or associated item named `bitor` found for trait objec
--> $DIR/issue-28344.rs:4:25
|
LL | let x: u8 = BitXor::bitor(0 as u8, 0 as u8);
| ^^^^^
| |
| function or associated item not found in `dyn BitXor<_>`
| help: there is a method with a similar name: `bitxor`
| ^^^^^ function or associated item not found in `dyn BitXor<_>`
|
help: there is a method `bitxor` with a similar name, but with different arguments
--> $SRC_DIR/core/src/ops/bit.rs:LL:COL
warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/issue-28344.rs:10:13
@ -50,10 +50,10 @@ error[E0599]: no function or associated item named `bitor` found for trait objec
--> $DIR/issue-28344.rs:10:21
|
LL | let g = BitXor::bitor;
| ^^^^^
| |
| function or associated item not found in `dyn BitXor<_>`
| help: there is a method with a similar name: `bitxor`
| ^^^^^ function or associated item not found in `dyn BitXor<_>`
|
help: there is a method `bitxor` with a similar name, but with different arguments
--> $SRC_DIR/core/src/ops/bit.rs:LL:COL
error: aborting due to 4 previous errors; 2 warnings emitted

6
tests/ui/issues/issue-39175.stderr
View File

@ -2,10 +2,12 @@ error[E0599]: no method named `exec` found for mutable reference `&mut Command`
--> $DIR/issue-39175.rs:14:39
|
LL | Command::new("echo").arg("hello").exec();
| ^^^^ method not found in `&mut Command`
| ^^^^
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: there is a method `pre_exec` with a similar name, but with different arguments
--> $SRC_DIR/std/src/os/unix/process.rs:LL:COL
help: trait `CommandExt` which provides `exec` is implemented but not in scope; perhaps you want to import it
|
LL + use std::os::unix::process::CommandExt;
|

16
tests/ui/issues/issue-56175.stderr
View File

@ -2,7 +2,7 @@ error[E0599]: no method named `trait_method` found for struct `FooStruct` in the
--> $DIR/issue-56175.rs:5:33
|
LL | reexported_trait::FooStruct.trait_method();
| ^^^^^^^^^^^^ method not found in `FooStruct`
| ^^^^^^^^^^^^
|
::: $DIR/auxiliary/reexported-trait.rs:3:12
|
@ -10,16 +10,20 @@ LL | fn trait_method(&self) {
| ------------ the method is available for `FooStruct` here
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Trait` which provides `trait_method` is implemented but not in scope; perhaps you want to import it
|
LL + use reexported_trait::Trait;
|
help: there is a method `trait_method_b` with a similar name
|
LL | reexported_trait::FooStruct.trait_method_b();
| ~~~~~~~~~~~~~~
error[E0599]: no method named `trait_method_b` found for struct `FooStruct` in the current scope
--> $DIR/issue-56175.rs:7:33
|
LL | reexported_trait::FooStruct.trait_method_b();
| ^^^^^^^^^^^^^^ method not found in `FooStruct`
| ^^^^^^^^^^^^^^
|
::: $DIR/auxiliary/reexported-trait.rs:7:12
|
@ -27,10 +31,14 @@ LL | fn trait_method_b(&self) {
| -------------- the method is available for `FooStruct` here
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `TraitB` which provides `trait_method_b` is implemented but not in scope; perhaps you want to import it
|
LL + use reexported_trait::TraitBRename;
|
help: there is a method `trait_method` with a similar name
|
LL | reexported_trait::FooStruct.trait_method();
| ~~~~~~~~~~~~
error: aborting due to 2 previous errors

7
tests/ui/methods/issues/issue-105732.stderr
View File

@ -10,7 +10,12 @@ error[E0599]: no method named `g` found for reference `&Self` in the current sco
--> $DIR/issue-105732.rs:10:14
|
LL | self.g();
| ^ help: there is a method with a similar name: `f`
| ^
|
help: there is a method `f` with a similar name
|
LL | self.f();
| ~
error: aborting due to 2 previous errors

7
tests/ui/methods/method-not-found-but-doc-alias.stderr
View File

@ -5,7 +5,12 @@ LL | struct Foo;
| ---------- method `quux` not found for this struct
...
LL | Foo.quux();
| ^^^^ help: there is a method with a similar name: `bar`
| ^^^^
|
help: there is a method `bar` with a similar name
|
LL | Foo.bar();
| ~~~
error: aborting due to 1 previous error

7
tests/ui/object-pointer-types.stderr
View File

@ -5,7 +5,12 @@ LL | fn owned(self: Box<Self>);
| --------- the method might not be found because of this arbitrary self type
...
LL | x.owned();
| ^^^^^ method not found in `&dyn Foo`
| ^^^^^
|
help: there is a method `to_owned` with a similar name
|
LL | x.to_owned();
| ~~~~~~~~
error[E0599]: no method named `owned` found for mutable reference `&mut dyn Foo` in the current scope
--> $DIR/object-pointer-types.rs:17:7

9
tests/ui/parser/emoji-identifiers.stderr
View File

@ -71,16 +71,17 @@ LL | struct 👀;
| --------- function or associated item `full_of✨` not found for this struct
...
LL | 👀::full_of✨()
| ^^^^^^^^^
| |
| function or associated item not found in `👀`
| help: there is an associated function with a similar name: `full_of_✨`
| ^^^^^^^^^ function or associated item not found in `👀`
|
note: if you're trying to build a new `👀`, consider using `👀::full_of_✨` which returns `👀`
--> $DIR/emoji-identifiers.rs:4:5
|
LL | fn full_of_✨() -> 👀 {
| ^^^^^^^^^^^^^^^^^^^^^
help: there is an associated function `full_of_✨` with a similar name
|
LL | 👀::full_of_✨()
| ~~~~~~~~~~
error[E0425]: cannot find function `i_like_to_😄_a_lot` in this scope
--> $DIR/emoji-identifiers.rs:13:13

10
tests/ui/resolve/typo-suggestion-mistyped-in-path.stderr
View File

@ -14,10 +14,12 @@ LL | struct Struct;
| ------------- function or associated item `fob` not found for this struct
...
LL | Struct::fob();
| ^^^
| |
| function or associated item not found in `Struct`
| help: there is an associated function with a similar name: `foo`
| ^^^ function or associated item not found in `Struct`
|
help: there is an associated function `foo` with a similar name
|
LL | Struct::foo();
| ~~~
error[E0433]: failed to resolve: use of undeclared type `Struc`
--> $DIR/typo-suggestion-mistyped-in-path.rs:27:5

31
tests/ui/rust-2018/trait-import-suggestions.stderr
View File

@ -5,13 +5,17 @@ LL | fn foobar(&self) { }
| ------ the method is available for `u32` here
...
LL | x.foobar();
| ^^^^^^ method not found in `u32`
| ^^^^^^
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Foobar` which provides `foobar` is implemented but not in scope; perhaps you want to import it
|
LL + use crate::foo::foobar::Foobar;
|
help: there is a method `bar` with a similar name
|
LL | x.bar();
| ~~~
error[E0599]: no method named `bar` found for type `u32` in the current scope
--> $DIR/trait-import-suggestions.rs:28:7
@ -20,19 +24,28 @@ LL | fn bar(&self) { }
| --- the method is available for `u32` here
...
LL | x.bar();
| ^^^ method not found in `u32`
| ^^^
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Bar` which provides `bar` is implemented but not in scope; perhaps you want to import it
|
LL + use crate::foo::Bar;
|
help: there is a method `foobar` with a similar name
|
LL | x.foobar();
| ~~~~~~
error[E0599]: no method named `baz` found for type `u32` in the current scope
--> $DIR/trait-import-suggestions.rs:29:7
|
LL | x.baz();
| ^^^ method not found in `u32`
| ^^^
|
help: there is a method `bar` with a similar name
|
LL | x.bar();
| ~~~
error[E0599]: no function or associated item named `from_str` found for type `u32` in the current scope
--> $DIR/trait-import-suggestions.rs:30:18
@ -41,14 +54,14 @@ LL | let y = u32::from_str("33");
| ^^^^^^^^ function or associated item not found in `u32`
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `FromStr` which provides `from_str` is implemented but not in scope; perhaps you want to import it
|
LL + use std::str::FromStr;
|
help: there is an associated function with a similar name
help: there is an associated function `from` with a similar name
|
LL | let y = u32::from_str_radix("33");
| ~~~~~~~~~~~~~~
LL | let y = u32::from("33");
| ~~~~
error: aborting due to 4 previous errors

2
tests/ui/rust-2018/uniform-paths/issue-87932.stderr
View File

@ -8,7 +8,7 @@ LL | A::deserialize();
| ^^^^^^^^^^^ function or associated item not found in `A`
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Deserialize` which provides `deserialize` is implemented but not in scope; perhaps you want to import it
|
LL + use <crate::A as issue_87932_a::Deserialize>::deserialize::_a::Deserialize;
|

8
tests/ui/rust-2021/future-prelude-collision-shadow.stderr
View File

@ -2,16 +2,20 @@ error[E0599]: no method named `try_into` found for type `u8` in the current scop
--> $DIR/future-prelude-collision-shadow.rs:27:26
|
LL | let _: u32 = 3u8.try_into().unwrap();
| ^^^^^^^^ method not found in `u8`
| ^^^^^^^^
|
= help: items from traits can only be used if the trait is in scope
= note: 'std::convert::TryInto' is included in the prelude starting in Edition 2021
help: the following traits are implemented but not in scope; perhaps add a `use` for one of them:
help: the following traits which provide `try_into` are implemented but not in scope; perhaps you want to import one of them
|
LL + use crate::m::TryIntoU32;
|
LL + use std::convert::TryInto;
|
help: there is a method `into` with a similar name
|
LL | let _: u32 = 3u8.into().unwrap();
| ~~~~
error: aborting due to 1 previous error

12
tests/ui/self/arbitrary_self_type_mut_difference.stderr
View File

@ -2,25 +2,33 @@ error[E0599]: no method named `x` found for struct `Pin<&S>` in the current scop
--> $DIR/arbitrary_self_type_mut_difference.rs:11:18
|
LL | Pin::new(&S).x();
| ^ help: there is a method with a similar name: `y`
| ^
|
note: method is available for `Pin<&mut S>`
--> $DIR/arbitrary_self_type_mut_difference.rs:6:5
|
LL | fn x(self: Pin<&mut Self>) {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
help: there is a method `y` with a similar name
|
LL | Pin::new(&S).y();
| ~
error[E0599]: no method named `y` found for struct `Pin<&mut S>` in the current scope
--> $DIR/arbitrary_self_type_mut_difference.rs:12:22
|
LL | Pin::new(&mut S).y();
| ^ help: there is a method with a similar name: `x`
| ^
|
note: method is available for `Pin<&S>`
--> $DIR/arbitrary_self_type_mut_difference.rs:7:5
|
LL | fn y(self: Pin<&Self>) {}
| ^^^^^^^^^^^^^^^^^^^^^^
help: there is a method `x` with a similar name
|
LL | Pin::new(&mut S).x();
| ~
error: aborting due to 2 previous errors

2
tests/ui/shadowed/shadowed-trait-methods.stderr
View File

@ -8,7 +8,7 @@ LL | ().f()
| ^ method not found in `()`
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `T` which provides `f` is implemented but not in scope; perhaps you want to import it
|
LL + use foo::T;
|

5
tests/ui/suggestions/dont-suggest-pin-array-dot-set.stderr
View File

@ -2,7 +2,10 @@ error[E0599]: no method named `set` found for array `[u8; 1]` in the current sco
--> $DIR/dont-suggest-pin-array-dot-set.rs:14:7
|
LL | a.set(0, 3);
| ^^^ help: there is a method with a similar name: `get`
| ^^^
|
help: there is a method `get` with a similar name, but with different arguments
--> $SRC_DIR/core/src/slice/mod.rs:LL:COL
error: aborting due to 1 previous error

2
tests/ui/suggestions/dont-wrap-ambiguous-receivers.rs
View File

@ -1,5 +1,5 @@
mod banana {
//~^ HELP the following traits are implemented but not in scope
//~^ HELP the following traits which provide `pick` are implemented but not in scope
pub struct Chaenomeles;
pub trait Apple {

2
tests/ui/suggestions/dont-wrap-ambiguous-receivers.stderr
View File

@ -8,7 +8,7 @@ LL | banana::Chaenomeles.pick()
| ^^^^ method not found in `Chaenomeles`
|
= help: items from traits can only be used if the trait is in scope
help: the following traits are implemented but not in scope; perhaps add a `use` for one of them:
help: the following traits which provide `pick` are implemented but not in scope; perhaps you want to import one of them
|
LL + use banana::Apple;
|

2
tests/ui/suggestions/import-trait-for-method-call.stderr
View File

@ -8,7 +8,7 @@ LL | h.finish()
= note: the method is available for `DefaultHasher` here
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Hasher` which provides `finish` is implemented but not in scope; perhaps you want to import it
|
LL + use std::hash::Hasher;
|

9
tests/ui/suggestions/issue-109291.stderr
View File

@ -2,10 +2,7 @@ error[E0599]: no function or associated item named `forced_capture` found for st
--> $DIR/issue-109291.rs:2:65
|
LL | println!("Custom backtrace: {}", std::backtrace::Backtrace::forced_capture());
| ^^^^^^^^^^^^^^
| |
| function or associated item not found in `Backtrace`
| help: there is an associated function with a similar name: `force_capture`
| ^^^^^^^^^^^^^^ function or associated item not found in `Backtrace`
|
note: if you're trying to build a new `Backtrace` consider using one of the following associated functions:
Backtrace::capture
@ -13,6 +10,10 @@ note: if you're trying to build a new `Backtrace` consider using one of the foll
Backtrace::disabled
Backtrace::create
--> $SRC_DIR/std/src/backtrace.rs:LL:COL
help: there is an associated function `force_capture` with a similar name
|
LL | println!("Custom backtrace: {}", std::backtrace::Backtrace::force_capture());
| ~~~~~~~~~~~~~
error: aborting due to 1 previous error

5
tests/ui/suggestions/suggest-methods.rs
View File

@ -7,6 +7,7 @@ impl Foo {
trait FooT {
fn bag(&self);
//~^ HELP there is a method
}
impl FooT for Foo {
@ -19,12 +20,14 @@ fn main() {
let s = "foo".to_string();
let _ = s.is_emtpy(); //~ ERROR no method named
//~^ HELP there is a method
// Generates a warning for `count_zeros()`. `count_ones()` is also a close
// match, but the former is closer.
let _ = 63u32.count_eos(); //~ ERROR no method named
//~^ HELP there is a method
// Does not generate a warning
let _ = 63u32.count_o(); //~ ERROR no method named
//~^ HELP there is a method
}

37
tests/ui/suggestions/suggest-methods.stderr
View File

@ -1,29 +1,50 @@
error[E0599]: no method named `bat` found for struct `Foo` in the current scope
--> $DIR/suggest-methods.rs:18:7
--> $DIR/suggest-methods.rs:19:7
|
LL | struct Foo;
| ---------- method `bat` not found for this struct
...
LL | f.bat(1.0);
| ^^^ help: there is a method with a similar name: `bar`
| ^^^
|
help: there is a method `bag` with a similar name, but with different arguments
--> $DIR/suggest-methods.rs:9:5
|
LL | fn bag(&self);
| ^^^^^^^^^^^^^^
error[E0599]: no method named `is_emtpy` found for struct `String` in the current scope
--> $DIR/suggest-methods.rs:21:15
--> $DIR/suggest-methods.rs:22:15
|
LL | let _ = s.is_emtpy();
| ^^^^^^^^ help: there is a method with a similar name: `is_empty`
| ^^^^^^^^
|
help: there is a method `is_empty` with a similar name
|
LL | let _ = s.is_empty();
| ~~~~~~~~
error[E0599]: no method named `count_eos` found for type `u32` in the current scope
--> $DIR/suggest-methods.rs:25:19
--> $DIR/suggest-methods.rs:27:19
|
LL | let _ = 63u32.count_eos();
| ^^^^^^^^^ help: there is a method with a similar name: `count_zeros`
| ^^^^^^^^^
|
help: there is a method `count_zeros` with a similar name
|
LL | let _ = 63u32.count_zeros();
| ~~~~~~~~~~~
error[E0599]: no method named `count_o` found for type `u32` in the current scope
--> $DIR/suggest-methods.rs:28:19
--> $DIR/suggest-methods.rs:30:19
|
LL | let _ = 63u32.count_o();
| ^^^^^^^ help: there is a method with a similar name: `count_ones`
| ^^^^^^^
|
help: there is a method `count_ones` with a similar name
|
LL | let _ = 63u32.count_ones();
| ~~~~~~~~~~
error: aborting due to 4 previous errors

1
tests/ui/suggestions/suggest-tryinto-edition-change.rs
View File

@ -5,7 +5,6 @@
fn test() {
let _i: i16 = 0_i32.try_into().unwrap();
//~^ ERROR no method named `try_into` found for type `i32` in the current scope
//~| NOTE method not found in `i32`
//~| NOTE 'std::convert::TryInto' is included in the prelude starting in Edition 2021
let _i: i16 = TryFrom::try_from(0_i32).unwrap();

14
tests/ui/suggestions/suggest-tryinto-edition-change.stderr
View File

@ -1,5 +1,5 @@
error[E0433]: failed to resolve: use of undeclared type `TryFrom`
--> $DIR/suggest-tryinto-edition-change.rs:11:19
--> $DIR/suggest-tryinto-edition-change.rs:10:19
|
LL | let _i: i16 = TryFrom::try_from(0_i32).unwrap();
| ^^^^^^^ use of undeclared type `TryFrom`
@ -14,7 +14,7 @@ LL + use std::convert::TryFrom;
|
error[E0433]: failed to resolve: use of undeclared type `TryInto`
--> $DIR/suggest-tryinto-edition-change.rs:17:19
--> $DIR/suggest-tryinto-edition-change.rs:16:19
|
LL | let _i: i16 = TryInto::try_into(0_i32).unwrap();
| ^^^^^^^ use of undeclared type `TryInto`
@ -29,7 +29,7 @@ LL + use std::convert::TryInto;
|
error[E0433]: failed to resolve: use of undeclared type `FromIterator`
--> $DIR/suggest-tryinto-edition-change.rs:23:22
--> $DIR/suggest-tryinto-edition-change.rs:22:22
|
LL | let _v: Vec<_> = FromIterator::from_iter(&[1]);
| ^^^^^^^^^^^^ use of undeclared type `FromIterator`
@ -51,17 +51,21 @@ error[E0599]: no method named `try_into` found for type `i32` in the current sco
--> $DIR/suggest-tryinto-edition-change.rs:6:25
|
LL | let _i: i16 = 0_i32.try_into().unwrap();
| ^^^^^^^^ method not found in `i32`
| ^^^^^^^^
--> $SRC_DIR/core/src/convert/mod.rs:LL:COL
|
= note: the method is available for `i32` here
|
= help: items from traits can only be used if the trait is in scope
= note: 'std::convert::TryInto' is included in the prelude starting in Edition 2021
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `TryInto` which provides `try_into` is implemented but not in scope; perhaps you want to import it
|
LL + use std::convert::TryInto;
|
help: there is a method `into` with a similar name
|
LL | let _i: i16 = 0_i32.into().unwrap();
| ~~~~
error: aborting due to 4 previous errors

2
tests/ui/suggestions/use-placement-typeck.stderr
View File

@ -11,7 +11,7 @@ LL | pub struct S;
| ------------ method `abc` not found for this struct
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Foo` which provides `abc` is implemented but not in scope; perhaps you want to import it
|
LL + use m::Foo;
|

8
tests/ui/traits/issue-117794.stderr
View File

@ -2,7 +2,13 @@ error[E0599]: no method named `b` found for reference `&Self` in the current sco
--> $DIR/issue-117794.rs:5:14
|
LL | self.b(|| 0)
| ^ help: there is a method with a similar name: `a`
| ^
|
help: there is a method `a` with a similar name, but with different arguments
--> $DIR/issue-117794.rs:4:5
|
LL | fn a(&self) -> impl Foo {
| ^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 1 previous error

42
tests/ui/traits/item-privacy.stderr
View File

@ -5,13 +5,17 @@ LL | struct S;
| -------- method `a` not found for this struct
...
LL | S.a();
| ^ method not found in `S`
| ^
|
= help: items from traits can only be used if the trait is implemented and in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `A` which provides `a` is implemented but not in scope; perhaps you want to import it
|
LL + use method::A;
|
help: there is a method `b` with a similar name
|
LL | S.b();
| ~
error[E0599]: no method named `b` found for struct `S` in the current scope
--> $DIR/item-privacy.rs:68:7
@ -23,13 +27,17 @@ LL | fn b(&self) { }
| - the method is available for `S` here
...
LL | S.b();
| ^ method not found in `S`
| ^
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `B` which provides `b` is implemented but not in scope; perhaps you want to import it
|
LL + use method::B;
|
help: there is a method `c` with a similar name
|
LL | S.c();
| ~
error[E0624]: method `a` is private
--> $DIR/item-privacy.rs:72:7
@ -50,7 +58,12 @@ LL | S::a(&S);
| ^ function or associated item not found in `S`
|
= help: items from traits can only be used if the trait is implemented and in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: there is an associated constant `B` with a similar name
--> $DIR/item-privacy.rs:29:9
|
LL | const B: u8 = 0;
| ^^^^^^^^^^^
help: trait `A` which provides `a` is implemented but not in scope; perhaps you want to import it
|
LL + use method::A;
|
@ -65,7 +78,12 @@ LL | S::b(&S);
| ^ function or associated item not found in `S`
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: there is an associated constant `B` with a similar name
--> $DIR/item-privacy.rs:29:9
|
LL | const B: u8 = 0;
| ^^^^^^^^^^^
help: trait `B` which provides `b` is implemented but not in scope; perhaps you want to import it
|
LL + use method::B;
|
@ -89,10 +107,14 @@ LL | S::A;
| ^ associated item not found in `S`
|
= help: items from traits can only be used if the trait is implemented and in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `A` which provides `A` is implemented but not in scope; perhaps you want to import it
|
LL + use assoc_const::A;
|
help: there is an associated constant `B` with a similar name
|
LL | S::B;
| ~
error[E0599]: no associated item named `B` found for struct `S` in the current scope
--> $DIR/item-privacy.rs:98:8
@ -104,10 +126,14 @@ LL | S::B;
| ^ associated item not found in `S`
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `B` which provides `B` is implemented but not in scope; perhaps you want to import it
|
LL + use assoc_const::B;
|
help: there is a method `b` with a similar name
|
LL | S::b;
| ~
error[E0624]: associated constant `A` is private
--> $DIR/item-privacy.rs:101:14

2
tests/ui/traits/method-private.stderr
View File

@ -8,7 +8,7 @@ LL | foo.method();
| ^^^^^^ private method
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Bar` which provides `method` is implemented but not in scope; perhaps you want to import it
|
LL + use inner::Bar;
|

30
tests/ui/traits/trait-upcasting/subtrait-method.stderr
View File

@ -2,7 +2,7 @@ error[E0599]: no method named `c` found for reference `&dyn Bar` in the current
--> $DIR/subtrait-method.rs:55:9
|
LL | bar.c();
| ^ help: there is a method with a similar name: `a`
| ^
|
= help: items from traits can only be used if the trait is implemented and in scope
note: `Baz` defines an item `c`, perhaps you need to implement it
@ -10,12 +10,16 @@ note: `Baz` defines an item `c`, perhaps you need to implement it
|
LL | trait Baz: Bar {
| ^^^^^^^^^^^^^^
help: there is a method `a` with a similar name
|
LL | bar.a();
| ~
error[E0599]: no method named `b` found for reference `&dyn Foo` in the current scope
--> $DIR/subtrait-method.rs:59:9
|
LL | foo.b();
| ^ help: there is a method with a similar name: `a`
| ^
|
= help: items from traits can only be used if the trait is implemented and in scope
note: `Bar` defines an item `b`, perhaps you need to implement it
@ -23,12 +27,16 @@ note: `Bar` defines an item `b`, perhaps you need to implement it
|
LL | trait Bar: Foo {
| ^^^^^^^^^^^^^^
help: there is a method `a` with a similar name
|
LL | foo.a();
| ~
error[E0599]: no method named `c` found for reference `&dyn Foo` in the current scope
--> $DIR/subtrait-method.rs:61:9
|
LL | foo.c();
| ^ help: there is a method with a similar name: `a`
| ^
|
= help: items from traits can only be used if the trait is implemented and in scope
note: `Baz` defines an item `c`, perhaps you need to implement it
@ -36,12 +44,16 @@ note: `Baz` defines an item `c`, perhaps you need to implement it
|
LL | trait Baz: Bar {
| ^^^^^^^^^^^^^^
help: there is a method `a` with a similar name
|
LL | foo.a();
| ~
error[E0599]: no method named `b` found for reference `&dyn Foo` in the current scope
--> $DIR/subtrait-method.rs:65:9
|
LL | foo.b();
| ^ help: there is a method with a similar name: `a`
| ^
|
= help: items from traits can only be used if the trait is implemented and in scope
note: `Bar` defines an item `b`, perhaps you need to implement it
@ -49,12 +61,16 @@ note: `Bar` defines an item `b`, perhaps you need to implement it
|
LL | trait Bar: Foo {
| ^^^^^^^^^^^^^^
help: there is a method `a` with a similar name
|
LL | foo.a();
| ~
error[E0599]: no method named `c` found for reference `&dyn Foo` in the current scope
--> $DIR/subtrait-method.rs:67:9
|
LL | foo.c();
| ^ help: there is a method with a similar name: `a`
| ^
|
= help: items from traits can only be used if the trait is implemented and in scope
note: `Baz` defines an item `c`, perhaps you need to implement it
@ -62,6 +78,10 @@ note: `Baz` defines an item `c`, perhaps you need to implement it
|
LL | trait Baz: Bar {
| ^^^^^^^^^^^^^^
help: there is a method `a` with a similar name
|
LL | foo.a();
| ~
error: aborting due to 5 previous errors

2
tests/ui/typeck/issue-43189.stderr
View File

@ -10,7 +10,7 @@ LL | fn a(&self) {}
| - the method is available for `()` here
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `A` which provides `a` is implemented but not in scope; perhaps you want to import it
|
LL + use xcrate_issue_43189_b::xcrate_issue_43189_a::A;
|

9
tests/ui/ufcs/bad-builder.stderr
View File

@ -2,10 +2,7 @@ error[E0599]: no function or associated item named `mew` found for struct `Vec<Q
--> $DIR/bad-builder.rs:2:15
|
LL | Vec::<Q>::mew()
| ^^^
| |
| function or associated item not found in `Vec<Q>`
| help: there is an associated function with a similar name: `new`
| ^^^ function or associated item not found in `Vec<Q>`
|
note: if you're trying to build a new `Vec<Q>` consider using one of the following associated functions:
Vec::<T>::new
@ -14,6 +11,10 @@ note: if you're trying to build a new `Vec<Q>` consider using one of the followi
Vec::<T, A>::new_in
and 2 others
--> $SRC_DIR/alloc/src/vec/mod.rs:LL:COL
help: there is an associated function `new` with a similar name
|
LL | Vec::<Q>::new()
| ~~~
error: aborting due to 1 previous error

2
tests/ui/underscore-imports/shadow.stderr
View File

@ -5,7 +5,7 @@ LL | x.deref();
| ^^^^^ method not found in `&()`
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
help: trait `Deref` which provides `deref` is implemented but not in scope; perhaps you want to import it
|
LL + use std::ops::Deref;
|