bjoernager/rust
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Remove impl Foo for .. in favor of auto trait Foo

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No longer parse it.
Remove AutoTrait variant from AST and HIR.
Remove backwards compatibility lint.
Remove coherence checks, they make no sense for the new syntax.
Remove from rustdoc.
This commit is contained in:
leonardo.yvens 2017-12-01 10:01:23 -02:00 • committed by Vadim Petrochenkov
parent 9b2f8ac29e
commit f93183adb4
54 changed files with 95 additions and 448 deletions
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57
src/libsyntax/parse/parser.rs
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@ -5374,11 +5374,9 @@ impl<'a> Parser<'a> {
/// Parses items implementations variants
/// impl<T> Foo { ... }
/// impl<T> ToString for &'static T { ... }
/// impl Send for .. {}
fn parse_item_impl(&mut self,
unsafety: ast::Unsafety,
defaultness: Defaultness) -> PResult<'a, ItemInfo> {
let impl_span = self.span;
// First, parse type parameters if necessary.
let mut generics = self.parse_generics()?;
@ -5421,48 +5419,31 @@ impl<'a> Parser<'a> {
None
};
if opt_trait.is_some() && self.eat(&token::DotDot) {
if generics.is_parameterized() {
self.span_err(impl_span, "auto trait implementations are not \
allowed to have generics");
}
if opt_trait.is_some() {
ty = self.parse_ty()?;
}
generics.where_clause = self.parse_where_clause()?;
if let ast::Defaultness::Default = defaultness {
self.span_err(impl_span, "`default impl` is not allowed for \
auto trait implementations");
}
self.expect(&token::OpenDelim(token::Brace))?;
let attrs = self.parse_inner_attributes()?;
self.expect(&token::OpenDelim(token::Brace))?;
self.expect(&token::CloseDelim(token::Brace))?;
Ok((keywords::Invalid.ident(),
ItemKind::AutoImpl(unsafety, opt_trait.unwrap()), None))
} else {
if opt_trait.is_some() {
ty = self.parse_ty()?;
}
generics.where_clause = self.parse_where_clause()?;
self.expect(&token::OpenDelim(token::Brace))?;
let attrs = self.parse_inner_attributes()?;
let mut impl_items = vec![];
while !self.eat(&token::CloseDelim(token::Brace)) {
let mut at_end = false;
match self.parse_impl_item(&mut at_end) {
Ok(item) => impl_items.push(item),
Err(mut e) => {
e.emit();
if !at_end {
self.recover_stmt_(SemiColonMode::Break, BlockMode::Break);
}
let mut impl_items = vec![];
while !self.eat(&token::CloseDelim(token::Brace)) {
let mut at_end = false;
match self.parse_impl_item(&mut at_end) {
Ok(item) => impl_items.push(item),
Err(mut e) => {
e.emit();
if !at_end {
self.recover_stmt_(SemiColonMode::Break, BlockMode::Break);
}
}
}
Ok((keywords::Invalid.ident(),
ItemKind::Impl(unsafety, polarity, defaultness, generics, opt_trait, ty, impl_items),
Some(attrs)))
}
Ok((keywords::Invalid.ident(),
ItemKind::Impl(unsafety, polarity, defaultness, generics, opt_trait, ty, impl_items),
Some(attrs)))
}
fn parse_late_bound_lifetime_defs(&mut self) -> PResult<'a, Vec<GenericParam>> {