bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

Rollup merge of #93046 - est31:let_else, r=davidtwco

Browse source 
Use let_else in even more places

Followup of #89933, #91018, #91481.
This commit is contained in:
Matthias Krüger 2022-01-21 22:03:17 +01:00 • committed by GitHub
commit ab19d4a515
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
9 changed files with 134 additions and 140 deletions
Download patch file Download diff file Expand all files Collapse all files

1
compiler/rustc_interface/src/lib.rs
View file

@ -1,5 +1,6 @@
#![feature(bool_to_option)]
#![feature(box_patterns)]
#![feature(let_else)]
#![feature(internal_output_capture)]
#![feature(thread_spawn_unchecked)]
#![feature(nll)]

94
compiler/rustc_interface/src/util.rs
View file

@ -717,57 +717,57 @@ impl<'a, 'b> ReplaceBodyWithLoop<'a, 'b> {
}
fn should_ignore_fn(ret_ty: &ast::FnRetTy) -> bool {
if let ast::FnRetTy::Ty(ref ty) = ret_ty {
fn involves_impl_trait(ty: &ast::Ty) -> bool {
match ty.kind {
ast::TyKind::ImplTrait(..) => true,
ast::TyKind::Slice(ref subty)
| ast::TyKind::Array(ref subty, _)
| ast::TyKind::Ptr(ast::MutTy { ty: ref subty, .. })
| ast::TyKind::Rptr(_, ast::MutTy { ty: ref subty, .. })
| ast::TyKind::Paren(ref subty) => involves_impl_trait(subty),
ast::TyKind::Tup(ref tys) => any_involves_impl_trait(tys.iter()),
ast::TyKind::Path(_, ref path) => {
path.segments.iter().any(|seg| match seg.args.as_deref() {
None => false,
Some(&ast::GenericArgs::AngleBracketed(ref data)) => {
data.args.iter().any(|arg| match arg {
ast::AngleBracketedArg::Arg(arg) => match arg {
ast::GenericArg::Type(ty) => involves_impl_trait(ty),
ast::GenericArg::Lifetime(_)
| ast::GenericArg::Const(_) => false,
},
ast::AngleBracketedArg::Constraint(c) => match c.kind {
ast::AssocConstraintKind::Bound { .. } => true,
ast::AssocConstraintKind::Equality { ref term } => {
match term {
Term::Ty(ty) => involves_impl_trait(ty),
// FIXME(...): This should check if the constant
// involves a trait impl, but for now ignore.
Term::Const(_) => false,
}
let ast::FnRetTy::Ty(ref ty) = ret_ty else {
return false;
};
fn involves_impl_trait(ty: &ast::Ty) -> bool {
match ty.kind {
ast::TyKind::ImplTrait(..) => true,
ast::TyKind::Slice(ref subty)
| ast::TyKind::Array(ref subty, _)
| ast::TyKind::Ptr(ast::MutTy { ty: ref subty, .. })
| ast::TyKind::Rptr(_, ast::MutTy { ty: ref subty, .. })
| ast::TyKind::Paren(ref subty) => involves_impl_trait(subty),
ast::TyKind::Tup(ref tys) => any_involves_impl_trait(tys.iter()),
ast::TyKind::Path(_, ref path) => {
path.segments.iter().any(|seg| match seg.args.as_deref() {
None => false,
Some(&ast::GenericArgs::AngleBracketed(ref data)) => {
data.args.iter().any(|arg| match arg {
ast::AngleBracketedArg::Arg(arg) => match arg {
ast::GenericArg::Type(ty) => involves_impl_trait(ty),
ast::GenericArg::Lifetime(_) | ast::GenericArg::Const(_) => {
false
}
},
ast::AngleBracketedArg::Constraint(c) => match c.kind {
ast::AssocConstraintKind::Bound { .. } => true,
ast::AssocConstraintKind::Equality { ref term } => {
match term {
Term::Ty(ty) => involves_impl_trait(ty),
// FIXME(...): This should check if the constant
// involves a trait impl, but for now ignore.
Term::Const(_) => false,
}
},
})
}
Some(&ast::GenericArgs::Parenthesized(ref data)) => {
any_involves_impl_trait(data.inputs.iter())
|| ReplaceBodyWithLoop::should_ignore_fn(&data.output)
}
})
}
_ => false,
}
},
})
}
Some(&ast::GenericArgs::Parenthesized(ref data)) => {
any_involves_impl_trait(data.inputs.iter())
|| ReplaceBodyWithLoop::should_ignore_fn(&data.output)
}
})
}
_ => false,
}
fn any_involves_impl_trait<'a, I: Iterator<Item = &'a P<ast::Ty>>>(mut it: I) -> bool {
it.any(|subty| involves_impl_trait(subty))
}
involves_impl_trait(ty)
} else {
false
}
fn any_involves_impl_trait<'a, I: Iterator<Item = &'a P<ast::Ty>>>(mut it: I) -> bool {
it.any(|subty| involves_impl_trait(subty))
}
involves_impl_trait(ty)
}
fn is_sig_const(sig: &ast::FnSig) -> bool {