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allow shorthand syntax for deprecation reason

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This commit is contained in:
Andy Russell 2019-02-04 12:41:01 -05:00
parent d30b99f9c2
commit 113b7f7be1
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GPG key ID: BE2221033EDBC374
8 changed files with 117 additions and 67 deletions
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125
src/libsyntax/attr/builtin.rs
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@ -592,81 +592,86 @@ fn find_deprecation_generic<'a, I>(sess: &ParseSess,
let diagnostic = &sess.span_diagnostic;
'outer: for attr in attrs_iter {
if attr.path != "deprecated" {
continue
if !attr.check_name("deprecated") {
continue;
}
mark_used(attr);
if depr.is_some() {
span_err!(diagnostic, item_sp, E0550, "multiple deprecated attributes");
break
}
depr = if let Some(metas) = attr.meta_item_list() {
let get = |meta: &MetaItem, item: &mut Option<Symbol>| {
if item.is_some() {
handle_errors(sess, meta.span, AttrError::MultipleItem(meta.name()));
return false
}
if let Some(v) = meta.value_str() {
*item = Some(v);
true
} else {
if let Some(lit) = meta.name_value_literal() {
handle_errors(
sess,
lit.span,
AttrError::UnsupportedLiteral(
"literal in `deprecated` \
value must be a string",
lit.node.is_bytestr()
),
);
} else {
span_err!(diagnostic, meta.span, E0551, "incorrect meta item");
let meta = attr.meta().unwrap();
depr = match &meta.node {
MetaItemKind::Word => Some(Deprecation { since: None, note: None }),
MetaItemKind::NameValue(..) => {
meta.value_str().map(|note| {
Deprecation { since: None, note: Some(note) }
})
}
MetaItemKind::List(list) => {
let get = |meta: &MetaItem, item: &mut Option<Symbol>| {
if item.is_some() {
handle_errors(sess, meta.span, AttrError::MultipleItem(meta.name()));
return false
}
if let Some(v) = meta.value_str() {
*item = Some(v);
true
} else {
if let Some(lit) = meta.name_value_literal() {
handle_errors(
sess,
lit.span,
AttrError::UnsupportedLiteral(
"literal in `deprecated` \
value must be a string",
lit.node.is_bytestr()
),
);
} else {
span_err!(diagnostic, meta.span, E0551, "incorrect meta item");
}
false
}
};
false
}
};
let mut since = None;
let mut note = None;
for meta in metas {
match &meta.node {
NestedMetaItemKind::MetaItem(mi) => {
match &*mi.name().as_str() {
"since" => if !get(mi, &mut since) { continue 'outer },
"note" => if !get(mi, &mut note) { continue 'outer },
_ => {
handle_errors(
sess,
meta.span,
AttrError::UnknownMetaItem(mi.name(), &["since", "note"]),
);
continue 'outer
let mut since = None;
let mut note = None;
for meta in list {
match &meta.node {
NestedMetaItemKind::MetaItem(mi) => {
match &*mi.name().as_str() {
"since" => if !get(mi, &mut since) { continue 'outer },
"note" => if !get(mi, &mut note) { continue 'outer },
_ => {
handle_errors(
sess,
meta.span,
AttrError::UnknownMetaItem(mi.name(), &["since", "note"]),
);
continue 'outer
}
}
}
}
NestedMetaItemKind::Literal(lit) => {
handle_errors(
sess,
lit.span,
AttrError::UnsupportedLiteral(
"item in `deprecated` must be a key/value pair",
false,
),
);
continue 'outer
NestedMetaItemKind::Literal(lit) => {
handle_errors(
sess,
lit.span,
AttrError::UnsupportedLiteral(
"item in `deprecated` must be a key/value pair",
false,
),
);
continue 'outer
}
}
}
}
Some(Deprecation {since: since, note: note})
} else {
Some(Deprecation{since: None, note: None})
}
Some(Deprecation { since, note })
}
};
}
depr