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use format-args-capture and remove unnecessary nested blocks

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This commit is contained in:
Takayuki Maeda
2022-04-09 00:01:40 +09:00
parent dc1f8298ef
commit 470b4fca0e
5 changed files with 116 additions and 133 deletions
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150
compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs
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@@ -55,7 +55,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
reason = ", as it is not declared as mutable".to_string();
} else {
let name = self.local_names[local].expect("immutable unnamed local");
reason = format!(", as `{}` is not declared as mutable", name);
reason = format!(", as `{name}` is not declared as mutable");
}
}
@@ -88,7 +88,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
reason = ", as it is not declared as mutable".to_string();
} else {
let name = self.upvars[upvar_index.index()].place.to_string(self.infcx.tcx);
reason = format!(", as `{}` is not declared as mutable", name);
reason = format!(", as `{name}` is not declared as mutable");
}
}
}
@@ -103,14 +103,14 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
if self.body.local_decls[local].is_ref_to_static() =>
{
if access_place.projection.len() == 1 {
item_msg = format!("immutable static item {}", access_place_desc);
item_msg = format!("immutable static item {access_place_desc}");
reason = String::new();
} else {
item_msg = access_place_desc;
let local_info = &self.body.local_decls[local].local_info;
if let Some(box LocalInfo::StaticRef { def_id, .. }) = *local_info {
let static_name = &self.infcx.tcx.item_name(def_id);
reason = format!(", as `{}` is an immutable static item", static_name);
reason = format!(", as `{static_name}` is an immutable static item");
} else {
bug!("is_ref_to_static return true, but not ref to static?");
}
@@ -148,15 +148,15 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
let pointer_type = source.describe_for_immutable_place(self.infcx.tcx);
opt_source = Some(source);
if let Some(desc) = self.describe_place(access_place.as_ref()) {
item_msg = format!("`{}`", desc);
item_msg = format!("`{desc}`");
reason = match error_access {
AccessKind::Mutate => format!(", which is behind {}", pointer_type),
AccessKind::Mutate => format!(", which is behind {pointer_type}"),
AccessKind::MutableBorrow => {
format!(", as it is behind {}", pointer_type)
format!(", as it is behind {pointer_type}")
}
}
} else {
item_msg = format!("data in {}", pointer_type);
item_msg = format!("data in {pointer_type}");
reason = String::new();
}
}
@@ -362,29 +362,27 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
let upvar_hir_id = captured_place.get_root_variable();
if let Some(Node::Binding(pat)) = self.infcx.tcx.hir().find(upvar_hir_id) {
if let hir::PatKind::Binding(
if let Some(Node::Binding(pat)) = self.infcx.tcx.hir().find(upvar_hir_id)
&& let hir::PatKind::Binding(
hir::BindingAnnotation::Unannotated,
_,
upvar_ident,
_,
) = pat.kind
{
err.span_suggestion(
upvar_ident.span,
"consider changing this to be mutable",
format!("mut {}", upvar_ident.name),
Applicability::MachineApplicable,
);
}
{
err.span_suggestion(
upvar_ident.span,
"consider changing this to be mutable",
format!("mut {}", upvar_ident.name),
Applicability::MachineApplicable,
);
}
let tcx = self.infcx.tcx;
if let ty::Ref(_, ty, Mutability::Mut) = the_place_err.ty(self.body, tcx).ty.kind()
&& let ty::Closure(id, _) = *ty.kind()
{
if let ty::Closure(id, _) = *ty.kind() {
self.show_mutating_upvar(tcx, id, the_place_err, &mut err);
}
self.show_mutating_upvar(tcx, id, the_place_err, &mut err);
}
}
@@ -544,8 +542,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
err.span_suggestion(
err_help_span,
&format!(
"consider changing this to be a mutable {}",
pointer_desc
"consider changing this to be a mutable {pointer_desc}"
),
suggested_code,
Applicability::MachineApplicable,
@@ -554,8 +551,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
err.span_suggestion(
x,
&format!(
"consider changing that to be a mutable {}",
pointer_desc
"consider changing that to be a mutable {pointer_desc}"
),
suggested_code,
Applicability::MachineApplicable,
@@ -606,15 +602,13 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
Some(BorrowedContentSource::OverloadedDeref(ty)) => {
err.help(&format!(
"trait `DerefMut` is required to modify through a dereference, \
but it is not implemented for `{}`",
ty,
but it is not implemented for `{ty}`",
));
}
Some(BorrowedContentSource::OverloadedIndex(ty)) => {
err.help(&format!(
"trait `IndexMut` is required to modify indexed content, \
but it is not implemented for `{}`",
ty,
but it is not implemented for `{ty}`",
));
}
_ => (),
@@ -724,18 +718,18 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
ty::UpvarCapture::ByRef(
ty::BorrowKind::MutBorrow | ty::BorrowKind::UniqueImmBorrow,
) => {
capture_reason = format!("mutable borrow of `{}`", upvar);
capture_reason = format!("mutable borrow of `{upvar}`");
}
ty::UpvarCapture::ByValue => {
capture_reason = format!("possible mutation of `{}`", upvar);
capture_reason = format!("possible mutation of `{upvar}`");
}
_ => bug!("upvar `{}` borrowed, but not mutably", upvar),
_ => bug!("upvar `{upvar}` borrowed, but not mutably"),
}
break;
}
}
if capture_reason.is_empty() {
bug!("upvar `{}` borrowed, but cannot find reason", upvar);
bug!("upvar `{upvar}` borrowed, but cannot find reason");
}
capture_reason
} else {
@@ -829,19 +823,19 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
.as_str()
.starts_with(&original_method_ident.name.to_string())
})
.map(|ident| format!("{}()", ident))
.map(|ident| format!("{ident}()"))
.peekable()
});
if let Some(mut suggestions) = opt_suggestions {
if suggestions.peek().is_some() {
err.span_suggestions(
*span,
"use mutable method",
suggestions,
Applicability::MaybeIncorrect,
);
}
if let Some(mut suggestions) = opt_suggestions
&& suggestions.peek().is_some()
{
err.span_suggestions(
*span,
"use mutable method",
suggestions,
Applicability::MaybeIncorrect,
);
}
}
};
@@ -849,7 +843,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
/// Targeted error when encountering an `FnMut` closure where an `Fn` closure was expected.
fn expected_fn_found_fn_mut_call(&self, err: &mut Diagnostic, sp: Span, act: &str) {
err.span_label(sp, format!("cannot {}", act));
err.span_label(sp, format!("cannot {act}"));
let hir = self.infcx.tcx.hir();
let closure_id = self.mir_hir_id();
@@ -1011,35 +1005,35 @@ fn suggest_ampmut<'tcx>(
opt_assignment_rhs_span: Option<Span>,
opt_ty_info: Option<Span>,
) -> (Span, String) {
if let Some(assignment_rhs_span) = opt_assignment_rhs_span {
if let Ok(src) = tcx.sess.source_map().span_to_snippet(assignment_rhs_span) {
let is_mutbl = |ty: &str| -> bool {
if let Some(rest) = ty.strip_prefix("mut") {
match rest.chars().next() {
// e.g. `&mut x`
Some(c) if c.is_whitespace() => true,
// e.g. `&mut(x)`
Some('(') => true,
// e.g. `&mut{x}`
Some('{') => true,
// e.g. `&mutablevar`
_ => false,
}
} else {
false
}
};
if let (true, Some(ws_pos)) = (src.starts_with("&'"), src.find(char::is_whitespace)) {
let lt_name = &src[1..ws_pos];
let ty = src[ws_pos..].trim_start();
if !is_mutbl(ty) {
return (assignment_rhs_span, format!("&{} mut {}", lt_name, ty));
}
} else if let Some(stripped) = src.strip_prefix('&') {
let stripped = stripped.trim_start();
if !is_mutbl(stripped) {
return (assignment_rhs_span, format!("&mut {}", stripped));
if let Some(assignment_rhs_span) = opt_assignment_rhs_span
&& let Ok(src) = tcx.sess.source_map().span_to_snippet(assignment_rhs_span)
{
let is_mutbl = |ty: &str| -> bool {
if let Some(rest) = ty.strip_prefix("mut") {
match rest.chars().next() {
// e.g. `&mut x`
Some(c) if c.is_whitespace() => true,
// e.g. `&mut(x)`
Some('(') => true,
// e.g. `&mut{x}`
Some('{') => true,
// e.g. `&mutablevar`
_ => false,
}
} else {
false
}
};
if let (true, Some(ws_pos)) = (src.starts_with("&'"), src.find(char::is_whitespace)) {
let lt_name = &src[1..ws_pos];
let ty = src[ws_pos..].trim_start();
if !is_mutbl(ty) {
return (assignment_rhs_span, format!("&{lt_name} mut {ty}"));
}
} else if let Some(stripped) = src.strip_prefix('&') {
let stripped = stripped.trim_start();
if !is_mutbl(stripped) {
return (assignment_rhs_span, format!("&mut {stripped}"));
}
}
}
@@ -1054,12 +1048,12 @@ fn suggest_ampmut<'tcx>(
None => local_decl.source_info.span,
};
if let Ok(src) = tcx.sess.source_map().span_to_snippet(highlight_span) {
if let (true, Some(ws_pos)) = (src.starts_with("&'"), src.find(char::is_whitespace)) {
let lt_name = &src[1..ws_pos];
let ty = &src[ws_pos..];
return (highlight_span, format!("&{} mut{}", lt_name, ty));
}
if let Ok(src) = tcx.sess.source_map().span_to_snippet(highlight_span)
&& let (true, Some(ws_pos)) = (src.starts_with("&'"), src.find(char::is_whitespace))
{
let lt_name = &src[1..ws_pos];
let ty = &src[ws_pos..];
return (highlight_span, format!("&{} mut{}", lt_name, ty));
}
let ty_mut = local_decl.ty.builtin_deref(true).unwrap();