bjoernager/rust
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Use more let chain

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This commit is contained in:
Guillaume Gomez 2023-02-15 11:30:14 +01:00
parent 9bb6e60d1f
commit 86fd5a1b44
16 changed files with 223 additions and 254 deletions
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6
src/librustdoc/clean/cfg.rs
View file

@ -164,11 +164,11 @@ impl Cfg {
/// Renders the configuration for human display, as a short HTML description.
pub(crate) fn render_short_html(&self) -> String {
let mut msg = Display(self, Format::ShortHtml).to_string();
if self.should_capitalize_first_letter() {
if let Some(i) = msg.find(|c: char| c.is_ascii_alphanumeric()) {
if self.should_capitalize_first_letter() &&
let Some(i) = msg.find(|c: char| c.is_ascii_alphanumeric())
{
msg[i..i + 1].make_ascii_uppercase();
}
}
msg
}

15
src/librustdoc/clean/inline.rs
View file

@ -390,20 +390,19 @@ pub(crate) fn build_impl(
// Only inline impl if the implemented trait is
// reachable in rustdoc generated documentation
if !did.is_local() {
if let Some(traitref) = associated_trait {
if !did.is_local() && let Some(traitref) = associated_trait {
let did = traitref.def_id;
if !cx.cache.effective_visibilities.is_directly_public(tcx, did) {
return;
}
if let Some(stab) = tcx.lookup_stability(did) {
if stab.is_unstable() && stab.feature == sym::rustc_private {
if let Some(stab) = tcx.lookup_stability(did) &&
stab.is_unstable() &&
stab.feature == sym::rustc_private
{
return;
}
}
}
}
let impl_item = match did.as_local() {
Some(did) => match &tcx.hir().expect_item(did).kind {
@ -525,11 +524,9 @@ pub(crate) fn build_impl(
}
while let Some(ty) = stack.pop() {
if let Some(did) = ty.def_id(&cx.cache) {
if tcx.is_doc_hidden(did) {
if let Some(did) = ty.def_id(&cx.cache) && tcx.is_doc_hidden(did) {
return;
}
}
if let Some(generics) = ty.generics() {
stack.extend(generics);
}

29
src/librustdoc/clean/mod.rs
View file

@ -787,8 +787,9 @@ fn clean_ty_generics<'tcx>(
None
})();
if let Some(param_idx) = param_idx {
if let Some(b) = impl_trait.get_mut(&param_idx.into()) {
if let Some(param_idx) = param_idx
&& let Some(b) = impl_trait.get_mut(&param_idx.into())
{
let p: WherePredicate = clean_predicate(*p, cx)?;
b.extend(
@ -824,7 +825,6 @@ fn clean_ty_generics<'tcx>(
return None;
}
}
Some(p)
})
@ -1461,11 +1461,11 @@ fn clean_qpath<'tcx>(hir_ty: &hir::Ty<'tcx>, cx: &mut DocContext<'tcx>) -> Type
// Try to normalize `<X as Y>::T` to a type
let ty = hir_ty_to_ty(cx.tcx, hir_ty);
// `hir_to_ty` can return projection types with escaping vars for GATs, e.g. `<() as Trait>::Gat<'_>`
if !ty.has_escaping_bound_vars() {
if let Some(normalized_value) = normalize(cx, ty::Binder::dummy(ty)) {
if !ty.has_escaping_bound_vars()
&& let Some(normalized_value) = normalize(cx, ty::Binder::dummy(ty))
{
return clean_middle_ty(normalized_value, cx, None);
}
}
let trait_segments = &p.segments[..p.segments.len() - 1];
let trait_def = cx.tcx.associated_item(p.res.def_id()).container_id(cx.tcx);
@ -1878,12 +1878,10 @@ fn clean_middle_opaque_bounds<'tcx>(
_ => return None,
};
if let Some(sized) = cx.tcx.lang_items().sized_trait() {
if trait_ref.def_id() == sized {
if let Some(sized) = cx.tcx.lang_items().sized_trait() && trait_ref.def_id() == sized {
has_sized = true;
return None;
}
}
let bindings: ThinVec<_> = bounds
.iter()
@ -2392,8 +2390,7 @@ fn clean_use_statement_inner<'tcx>(
let is_visible_from_parent_mod =
visibility.is_accessible_from(parent_mod, cx.tcx) && !current_mod.is_top_level_module();
if pub_underscore {
if let Some(ref inline) = inline_attr {
if pub_underscore && let Some(ref inline) = inline_attr {
rustc_errors::struct_span_err!(
cx.tcx.sess,
inline.span(),
@ -2403,7 +2400,6 @@ fn clean_use_statement_inner<'tcx>(
.span_label(import.span, "anonymous import")
.emit();
}
}
// We consider inlining the documentation of `pub use` statements, but we
// forcefully don't inline if this is not public or if the
@ -2438,15 +2434,14 @@ fn clean_use_statement_inner<'tcx>(
}
Import::new_glob(resolve_use_source(cx, path), true)
} else {
if inline_attr.is_none() {
if let Res::Def(DefKind::Mod, did) = path.res {
if !did.is_local() && did.is_crate_root() {
if inline_attr.is_none()
&& let Res::Def(DefKind::Mod, did) = path.res
&& !did.is_local() && did.is_crate_root()
{
// if we're `pub use`ing an extern crate root, don't inline it unless we
// were specifically asked for it
denied = true;
}
}
}
if !denied {
let mut visited = DefIdSet::default();
let import_def_id = import.owner_id.to_def_id();

10
src/librustdoc/clean/types.rs
View file

@ -182,11 +182,9 @@ impl ExternalCrate {
return Local;
}
if extern_url_takes_precedence {
if let Some(url) = extern_url {
if extern_url_takes_precedence && let Some(url) = extern_url {
return to_remote(url);
}
}
// Failing that, see if there's an attribute specifying where to find this
// external crate
@ -1172,11 +1170,11 @@ impl GenericBound {
pub(crate) fn is_sized_bound(&self, cx: &DocContext<'_>) -> bool {
use rustc_hir::TraitBoundModifier as TBM;
if let GenericBound::TraitBound(PolyTrait { ref trait_, .. }, TBM::None) = *self {
if Some(trait_.def_id()) == cx.tcx.lang_items().sized_trait() {
if let GenericBound::TraitBound(PolyTrait { ref trait_, .. }, TBM::None) = *self &&
Some(trait_.def_id()) == cx.tcx.lang_items().sized_trait()
{
return true;
}
}
false
}

6
src/librustdoc/clean/utils.rs
View file

@ -345,12 +345,12 @@ pub(crate) fn is_literal_expr(tcx: TyCtxt<'_>, hir_id: hir::HirId) -> bool {
return true;
}
if let hir::ExprKind::Unary(hir::UnOp::Neg, expr) = &expr.kind {
if let hir::ExprKind::Lit(_) = &expr.kind {
if let hir::ExprKind::Unary(hir::UnOp::Neg, expr) = &expr.kind &&
let hir::ExprKind::Lit(_) = &expr.kind
{
return true;
}
}
}
false
}

37
src/librustdoc/doctest.rs
View file

@ -229,14 +229,14 @@ fn scrape_test_config(attrs: &[ast::Attribute]) -> GlobalTestOptions {
if attr.has_name(sym::no_crate_inject) {
opts.no_crate_inject = true;
}
if attr.has_name(sym::attr) {
if let Some(l) = attr.meta_item_list() {
if attr.has_name(sym::attr)
&& let Some(l) = attr.meta_item_list()
{
for item in l {
opts.attrs.push(pprust::meta_list_item_to_string(item));
}
}
}
}
opts
}
@ -594,16 +594,16 @@ pub(crate) fn make_test(
loop {
match parser.parse_item(ForceCollect::No) {
Ok(Some(item)) => {
if !found_main {
if let ast::ItemKind::Fn(..) = item.kind {
if item.ident.name == sym::main {
if !found_main &&
let ast::ItemKind::Fn(..) = item.kind &&
item.ident.name == sym::main
{
found_main = true;
}
}
}
if !found_extern_crate {
if let ast::ItemKind::ExternCrate(original) = item.kind {
if !found_extern_crate &&
let ast::ItemKind::ExternCrate(original) = item.kind
{
// This code will never be reached if `crate_name` is none because
// `found_extern_crate` is initialized to `true` if it is none.
let crate_name = crate_name.unwrap();
@ -613,13 +613,10 @@ pub(crate) fn make_test(
None => found_extern_crate = item.ident.as_str() == crate_name,
}
}
}
if !found_macro {
if let ast::ItemKind::MacCall(..) = item.kind {
if !found_macro && let ast::ItemKind::MacCall(..) = item.kind {
found_macro = true;
}
}
if found_main && found_extern_crate {
break;
@ -972,15 +969,13 @@ impl Collector {
fn get_filename(&self) -> FileName {
if let Some(ref source_map) = self.source_map {
let filename = source_map.span_to_filename(self.position);
if let FileName::Real(ref filename) = filename {
if let Ok(cur_dir) = env::current_dir() {
if let Some(local_path) = filename.local_path() {
if let Ok(path) = local_path.strip_prefix(&cur_dir) {
if let FileName::Real(ref filename) = filename &&
let Ok(cur_dir) = env::current_dir() &&
let Some(local_path) = filename.local_path() &&
let Ok(path) = local_path.strip_prefix(&cur_dir)
{
return path.to_owned().into();
}
}
}
}
filename
} else if let Some(ref filename) = self.filename {
filename.clone().into()

9
src/librustdoc/formats/cache.rs
View file

@ -229,17 +229,16 @@ impl<'a, 'tcx> DocFolder for CacheBuilder<'a, 'tcx> {
}
// Collect all the implementors of traits.
if let clean::ImplItem(ref i) = *item.kind {
if let Some(trait_) = &i.trait_ {
if !i.kind.is_blanket() {
if let clean::ImplItem(ref i) = *item.kind &&
let Some(trait_) = &i.trait_ &&
!i.kind.is_blanket()
{
self.cache
.implementors
.entry(trait_.def_id())
.or_default()
.push(Impl { impl_item: item.clone() });
}
}
}
// Index this method for searching later on.
if let Some(s) = item.name.or_else(|| {

4
src/librustdoc/html/format.rs
View file

@ -709,12 +709,10 @@ pub(crate) fn href_with_root_path(
}
}
};
if !is_remote {
if let Some(root_path) = root_path {
if !is_remote && let Some(root_path) = root_path {
let root = root_path.trim_end_matches('/');
url_parts.push_front(root);
}
}
debug!(?url_parts);
match shortty {
ItemType::Module => {

4
src/librustdoc/html/highlight.rs
View file

@ -466,11 +466,9 @@ impl<'a> PeekIter<'a> {
}
/// Returns the next item after the current one. It doesn't interfere with `peek_next` output.
fn peek(&mut self) -> Option<&(TokenKind, &'a str)> {
if self.stored.is_empty() {
if let Some(next) = self.iter.next() {
if self.stored.is_empty() && let Some(next) = self.iter.next() {
self.stored.push_back(next);
}
}
self.stored.front()
}
/// Returns the next item after the last one peeked. It doesn't interfere with `peek` output.

4
src/librustdoc/html/render/context.rs
View file

@ -705,15 +705,13 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
shared.fs.write(scrape_examples_help_file, v)?;
}
if let Some(ref redirections) = shared.redirections {
if !redirections.borrow().is_empty() {
if let Some(ref redirections) = shared.redirections && !redirections.borrow().is_empty() {
let redirect_map_path =
self.dst.join(crate_name.as_str()).join("redirect-map.json");
let paths = serde_json::to_string(&*redirections.borrow()).unwrap();
shared.ensure_dir(&self.dst.join(crate_name.as_str()))?;
shared.fs.write(redirect_map_path, paths)?;
}
}
// No need for it anymore.
drop(shared);

20
src/librustdoc/html/render/mod.rs
View file

@ -2225,15 +2225,14 @@ fn sidebar_deref_methods(
})
{
debug!("found target, real_target: {:?} {:?}", target, real_target);
if let Some(did) = target.def_id(c) {
if let Some(type_did) = impl_.inner_impl().for_.def_id(c) {
if let Some(did) = target.def_id(c) &&
let Some(type_did) = impl_.inner_impl().for_.def_id(c) &&
// `impl Deref<Target = S> for S`
if did == type_did || !derefs.insert(did) {
(did == type_did || !derefs.insert(did))
{
// Avoid infinite cycles
return;
}
}
}
let deref_mut = v.iter().any(|i| i.trait_did() == cx.tcx().lang_items().deref_mut_trait());
let inner_impl = target
.def_id(c)
@ -2266,15 +2265,16 @@ fn sidebar_deref_methods(
}
// Recurse into any further impls that might exist for `target`
if let Some(target_did) = target.def_id(c) {
if let Some(target_impls) = c.impls.get(&target_did) {
if let Some(target_deref_impl) = target_impls.iter().find(|i| {
if let Some(target_did) = target.def_id(c) &&
let Some(target_impls) = c.impls.get(&target_did) &&
let Some(target_deref_impl) = target_impls.iter().find(|i| {
i.inner_impl()
.trait_
.as_ref()
.map(|t| Some(t.def_id()) == cx.tcx().lang_items().deref_trait())
.unwrap_or(false)
}) {
})
{
sidebar_deref_methods(
cx,
out,
@ -2286,8 +2286,6 @@ fn sidebar_deref_methods(
}
}
}
}
}
fn sidebar_struct(cx: &Context<'_>, buf: &mut Buffer, it: &clean::Item, s: &clean::Struct) {
let mut sidebar = Buffer::new();

9
src/librustdoc/json/mod.rs
View file

@ -80,13 +80,12 @@ impl<'tcx> JsonRenderer<'tcx> {
// document primitive items in an arbitrary crate by using
// `doc(primitive)`.
let mut is_primitive_impl = false;
if let clean::types::ItemKind::ImplItem(ref impl_) = *item.kind {
if impl_.trait_.is_none() {
if let clean::types::Type::Primitive(_) = impl_.for_ {
if let clean::types::ItemKind::ImplItem(ref impl_) = *item.kind &&
impl_.trait_.is_none() &&
let clean::types::Type::Primitive(_) = impl_.for_
{
is_primitive_impl = true;
}
}
}
if item.item_id.is_local() || is_primitive_impl {
self.item(item.clone()).unwrap();

11
src/librustdoc/passes/check_doc_test_visibility.rs
View file

@ -82,19 +82,18 @@ pub(crate) fn should_have_doc_example(cx: &DocContext<'_>, item: &clean::Item) -
let def_id = item.item_id.expect_def_id().expect_local();
// check if parent is trait impl
if let Some(parent_def_id) = cx.tcx.opt_local_parent(def_id) {
if let Some(parent_node) = cx.tcx.hir().find_by_def_id(parent_def_id) {
if matches!(
if let Some(parent_def_id) = cx.tcx.opt_local_parent(def_id) &&
let Some(parent_node) = cx.tcx.hir().find_by_def_id(parent_def_id) &&
matches!(
parent_node,
hir::Node::Item(hir::Item {
kind: hir::ItemKind::Impl(hir::Impl { of_trait: Some(_), .. }),
..
})
) {
)
{
return false;
}
}
}
if cx.tcx.is_doc_hidden(def_id.to_def_id())
|| inherits_doc_hidden(cx.tcx, def_id)

7
src/librustdoc/passes/collect_trait_impls.rs
View file

@ -156,9 +156,9 @@ pub(crate) fn collect_trait_impls(mut krate: Crate, cx: &mut DocContext<'_>) ->
// scan through included items ahead of time to splice in Deref targets to the "valid" sets
for it in new_items_external.iter().chain(new_items_local.iter()) {
if let ImplItem(box Impl { ref for_, ref trait_, ref items, .. }) = *it.kind {
if trait_.as_ref().map(|t| t.def_id()) == cx.tcx.lang_items().deref_trait()
&& cleaner.keep_impl(for_, true)
if let ImplItem(box Impl { ref for_, ref trait_, ref items, .. }) = *it.kind &&
trait_.as_ref().map(|t| t.def_id()) == cx.tcx.lang_items().deref_trait() &&
cleaner.keep_impl(for_, true)
{
let target = items
.iter()
@ -193,7 +193,6 @@ pub(crate) fn collect_trait_impls(mut krate: Crate, cx: &mut DocContext<'_>) ->
}
}
}
}
// Filter out external items that are not needed
new_items_external.retain(|it| {

4
src/librustdoc/passes/lint/html_tags.rs
View file

@ -210,12 +210,10 @@ fn extract_path_backwards(text: &str, end_pos: usize) -> Option<usize> {
.take_while(|(_, c)| is_id_start(*c) || is_id_continue(*c))
.reduce(|_accum, item| item)
.and_then(|(new_pos, c)| is_id_start(c).then_some(new_pos));
if let Some(new_pos) = new_pos {
if current_pos != new_pos {
if let Some(new_pos) = new_pos && current_pos != new_pos {
current_pos = new_pos;
continue;
}
}
break;
}
if current_pos == end_pos { None } else { Some(current_pos) }

16
src/librustdoc/passes/stripper.rs
View file

@ -201,22 +201,21 @@ impl<'a> DocFolder for ImplStripper<'a, '_> {
// Because we don't inline in `maybe_inline_local` if the output format is JSON,
// we need to make a special check for JSON output: we want to keep it unless it has
// a `#[doc(hidden)]` attribute if the `for_` type is exported.
if let Some(did) = imp.for_.def_id(self.cache) {
if !imp.for_.is_assoc_ty() && !self.should_keep_impl(&i, did) {
if let Some(did) = imp.for_.def_id(self.cache) &&
!imp.for_.is_assoc_ty() && !self.should_keep_impl(&i, did)
{
debug!("ImplStripper: impl item for stripped type; removing");
return None;
}
}
if let Some(did) = imp.trait_.as_ref().map(|t| t.def_id()) {
if !self.should_keep_impl(&i, did) {
if let Some(did) = imp.trait_.as_ref().map(|t| t.def_id()) &&
!self.should_keep_impl(&i, did) {
debug!("ImplStripper: impl item for stripped trait; removing");
return None;
}
}
if let Some(generics) = imp.trait_.as_ref().and_then(|t| t.generics()) {
for typaram in generics {
if let Some(did) = typaram.def_id(self.cache) {
if !self.should_keep_impl(&i, did) {
if let Some(did) = typaram.def_id(self.cache) && !self.should_keep_impl(&i, did)
{
debug!(
"ImplStripper: stripped item in trait's generics; removing impl"
);
@ -225,7 +224,6 @@ impl<'a> DocFolder for ImplStripper<'a, '_> {
}
}
}
}
Some(self.fold_item_recur(i))
}
}