Eliminate rustc_attr::builtin::handle_errors

This commit is contained in:
David Tolnay 2023-10-22 12:21:51 -07:00
parent 3c92dcc6f3
commit f5429a0186
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GPG Key ID: F9BA143B95FF6D82

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@ -31,16 +31,6 @@ pub fn is_builtin_attr(attr: &Attribute) -> bool {
attr.is_doc_comment() || attr.ident().is_some_and(|ident| is_builtin_attr_name(ident.name))
}
enum AttrError {
MultipleItem(String),
UnknownMetaItem(String, &'static [&'static str]),
MissingSince,
NonIdentFeature,
MissingFeature,
MultipleStabilityLevels,
UnsupportedLiteral(UnsupportedLiteralReason, /* is_bytestr */ bool),
}
pub(crate) enum UnsupportedLiteralReason {
Generic,
CfgString,
@ -48,37 +38,6 @@ pub(crate) enum UnsupportedLiteralReason {
DeprecatedKvPair,
}
fn handle_errors(sess: &ParseSess, span: Span, error: AttrError) {
match error {
AttrError::MultipleItem(item) => {
sess.emit_err(session_diagnostics::MultipleItem { span, item });
}
AttrError::UnknownMetaItem(item, expected) => {
sess.emit_err(session_diagnostics::UnknownMetaItem { span, item, expected });
}
AttrError::MissingSince => {
sess.emit_err(session_diagnostics::MissingSince { span });
}
AttrError::NonIdentFeature => {
sess.emit_err(session_diagnostics::NonIdentFeature { span });
}
AttrError::MissingFeature => {
sess.emit_err(session_diagnostics::MissingFeature { span });
}
AttrError::MultipleStabilityLevels => {
sess.emit_err(session_diagnostics::MultipleStabilityLevels { span });
}
AttrError::UnsupportedLiteral(reason, is_bytestr) => {
sess.emit_err(session_diagnostics::UnsupportedLiteral {
span,
reason,
is_bytestr,
start_point_span: sess.source_map().start_point(span),
});
}
}
}
#[derive(Copy, Clone, PartialEq, Encodable, Decodable, Debug, HashStable_Generic)]
pub enum InlineAttr {
None,
@ -241,7 +200,8 @@ pub fn find_stability(
sym::rustc_allowed_through_unstable_modules => allowed_through_unstable_modules = true,
sym::unstable => {
if stab.is_some() {
handle_errors(&sess.parse_sess, attr.span, AttrError::MultipleStabilityLevels);
sess.parse_sess
.emit_err(session_diagnostics::MultipleStabilityLevels { span: attr.span });
break;
}
@ -251,7 +211,8 @@ pub fn find_stability(
}
sym::stable => {
if stab.is_some() {
handle_errors(&sess.parse_sess, attr.span, AttrError::MultipleStabilityLevels);
sess.parse_sess
.emit_err(session_diagnostics::MultipleStabilityLevels { span: attr.span });
break;
}
if let Some((feature, level)) = parse_stability(sess, attr) {
@ -295,7 +256,8 @@ pub fn find_const_stability(
sym::rustc_promotable => promotable = true,
sym::rustc_const_unstable => {
if const_stab.is_some() {
handle_errors(&sess.parse_sess, attr.span, AttrError::MultipleStabilityLevels);
sess.parse_sess
.emit_err(session_diagnostics::MultipleStabilityLevels { span: attr.span });
break;
}
@ -306,7 +268,8 @@ pub fn find_const_stability(
}
sym::rustc_const_stable => {
if const_stab.is_some() {
handle_errors(&sess.parse_sess, attr.span, AttrError::MultipleStabilityLevels);
sess.parse_sess
.emit_err(session_diagnostics::MultipleStabilityLevels { span: attr.span });
break;
}
if let Some((feature, level)) = parse_stability(sess, attr) {
@ -340,7 +303,8 @@ pub fn find_body_stability(
for attr in attrs {
if attr.has_name(sym::rustc_default_body_unstable) {
if body_stab.is_some() {
handle_errors(&sess.parse_sess, attr.span, AttrError::MultipleStabilityLevels);
sess.parse_sess
.emit_err(session_diagnostics::MultipleStabilityLevels { span: attr.span });
break;
}
@ -355,11 +319,10 @@ pub fn find_body_stability(
fn insert_or_error(sess: &Session, meta: &MetaItem, item: &mut Option<Symbol>) -> Option<()> {
if item.is_some() {
handle_errors(
&sess.parse_sess,
meta.span,
AttrError::MultipleItem(pprust::path_to_string(&meta.path)),
);
sess.parse_sess.emit_err(session_diagnostics::MultipleItem {
span: meta.span,
item: pprust::path_to_string(&meta.path),
});
None
} else if let Some(v) = meta.value_str() {
*item = Some(v);
@ -380,11 +343,12 @@ fn parse_stability(sess: &Session, attr: &Attribute) -> Option<(Symbol, Stabilit
let mut since = None;
for meta in metas {
let Some(mi) = meta.meta_item() else {
handle_errors(
&sess.parse_sess,
meta.span(),
AttrError::UnsupportedLiteral(UnsupportedLiteralReason::Generic, false),
);
sess.parse_sess.emit_err(session_diagnostics::UnsupportedLiteral {
span: meta.span(),
reason: UnsupportedLiteralReason::Generic,
is_bytestr: false,
start_point_span: sess.parse_sess.source_map().start_point(meta.span()),
});
return None;
};
@ -392,14 +356,11 @@ fn parse_stability(sess: &Session, attr: &Attribute) -> Option<(Symbol, Stabilit
sym::feature => insert_or_error(sess, mi, &mut feature)?,
sym::since => insert_or_error(sess, mi, &mut since)?,
_ => {
handle_errors(
&sess.parse_sess,
meta.span(),
AttrError::UnknownMetaItem(
pprust::path_to_string(&mi.path),
&["feature", "since"],
),
);
sess.parse_sess.emit_err(session_diagnostics::UnknownMetaItem {
span: meta.span(),
item: pprust::path_to_string(&mi.path),
expected: &["feature", "since"],
});
return None;
}
}
@ -417,11 +378,11 @@ fn parse_stability(sess: &Session, attr: &Attribute) -> Option<(Symbol, Stabilit
Some((feature, level))
}
(None, _) => {
handle_errors(&sess.parse_sess, attr.span, AttrError::MissingFeature);
sess.parse_sess.emit_err(session_diagnostics::MissingFeature { span: attr.span });
None
}
_ => {
handle_errors(&sess.parse_sess, attr.span, AttrError::MissingSince);
sess.parse_sess.emit_err(session_diagnostics::MissingSince { span: attr.span });
None
}
}
@ -441,11 +402,12 @@ fn parse_unstability(sess: &Session, attr: &Attribute) -> Option<(Symbol, Stabil
let mut implied_by = None;
for meta in metas {
let Some(mi) = meta.meta_item() else {
handle_errors(
&sess.parse_sess,
meta.span(),
AttrError::UnsupportedLiteral(UnsupportedLiteralReason::Generic, false),
);
sess.parse_sess.emit_err(session_diagnostics::UnsupportedLiteral {
span: meta.span(),
reason: UnsupportedLiteralReason::Generic,
is_bytestr: false,
start_point_span: sess.parse_sess.source_map().start_point(meta.span()),
});
return None;
};
@ -484,14 +446,11 @@ fn parse_unstability(sess: &Session, attr: &Attribute) -> Option<(Symbol, Stabil
}
sym::implied_by => insert_or_error(sess, mi, &mut implied_by)?,
_ => {
handle_errors(
&sess.parse_sess,
meta.span(),
AttrError::UnknownMetaItem(
pprust::path_to_string(&mi.path),
&["feature", "reason", "issue", "soft", "implied_by"],
),
);
sess.parse_sess.emit_err(session_diagnostics::UnknownMetaItem {
span: meta.span(),
item: pprust::path_to_string(&mi.path),
expected: &["feature", "reason", "issue", "soft", "implied_by"],
});
return None;
}
}
@ -500,7 +459,7 @@ fn parse_unstability(sess: &Session, attr: &Attribute) -> Option<(Symbol, Stabil
match (feature, reason, issue) {
(Some(feature), reason, Some(_)) => {
if !rustc_lexer::is_ident(feature.as_str()) {
handle_errors(&sess.parse_sess, attr.span, AttrError::NonIdentFeature);
sess.parse_sess.emit_err(session_diagnostics::NonIdentFeature { span: attr.span });
return None;
}
let level = StabilityLevel::Unstable {
@ -512,7 +471,7 @@ fn parse_unstability(sess: &Session, attr: &Attribute) -> Option<(Symbol, Stabil
Some((feature, level))
}
(None, _, _) => {
handle_errors(&sess.parse_sess, attr.span, AttrError::MissingFeature);
sess.parse_sess.emit_err(session_diagnostics::MissingFeature { span: attr.span });
return None;
}
_ => {
@ -659,11 +618,12 @@ pub fn eval_condition(
ast::MetaItemKind::List(mis) => {
for mi in mis.iter() {
if !mi.is_meta_item() {
handle_errors(
sess,
mi.span(),
AttrError::UnsupportedLiteral(UnsupportedLiteralReason::Generic, false),
);
sess.emit_err(session_diagnostics::UnsupportedLiteral {
span: mi.span(),
reason: UnsupportedLiteralReason::Generic,
is_bytestr: false,
start_point_span: sess.source_map().start_point(mi.span()),
});
return false;
}
}
@ -731,14 +691,12 @@ pub fn eval_condition(
true
}
MetaItemKind::NameValue(lit) if !lit.kind.is_str() => {
handle_errors(
sess,
lit.span,
AttrError::UnsupportedLiteral(
UnsupportedLiteralReason::CfgString,
lit.kind.is_bytestr(),
),
);
sess.emit_err(session_diagnostics::UnsupportedLiteral {
span: lit.span,
reason: UnsupportedLiteralReason::CfgString,
is_bytestr: lit.kind.is_bytestr(),
start_point_span: sess.source_map().start_point(lit.span),
});
true
}
ast::MetaItemKind::Word | ast::MetaItemKind::NameValue(..) => {
@ -795,11 +753,10 @@ pub fn find_deprecation(
MetaItemKind::List(list) => {
let get = |meta: &MetaItem, item: &mut Option<Symbol>| {
if item.is_some() {
handle_errors(
&sess.parse_sess,
meta.span,
AttrError::MultipleItem(pprust::path_to_string(&meta.path)),
);
sess.parse_sess.emit_err(session_diagnostics::MultipleItem {
span: meta.span,
item: pprust::path_to_string(&meta.path),
});
return false;
}
if let Some(v) = meta.value_str() {
@ -807,14 +764,15 @@ pub fn find_deprecation(
true
} else {
if let Some(lit) = meta.name_value_literal() {
handle_errors(
&sess.parse_sess,
lit.span,
AttrError::UnsupportedLiteral(
UnsupportedLiteralReason::DeprecatedString,
lit.kind.is_bytestr(),
),
);
sess.parse_sess.emit_err(session_diagnostics::UnsupportedLiteral {
span: lit.span,
reason: UnsupportedLiteralReason::DeprecatedString,
is_bytestr: lit.kind.is_bytestr(),
start_point_span: sess
.parse_sess
.source_map()
.start_point(lit.span),
});
} else {
sess.emit_err(session_diagnostics::IncorrectMetaItem {
span: meta.span,
@ -852,30 +810,28 @@ pub fn find_deprecation(
}
}
_ => {
handle_errors(
&sess.parse_sess,
meta.span(),
AttrError::UnknownMetaItem(
pprust::path_to_string(&mi.path),
if features.deprecated_suggestion {
&["since", "note", "suggestion"]
} else {
&["since", "note"]
},
),
);
sess.parse_sess.emit_err(session_diagnostics::UnknownMetaItem {
span: meta.span(),
item: pprust::path_to_string(&mi.path),
expected: if features.deprecated_suggestion {
&["since", "note", "suggestion"]
} else {
&["since", "note"]
},
});
continue 'outer;
}
},
NestedMetaItem::Lit(lit) => {
handle_errors(
&sess.parse_sess,
lit.span,
AttrError::UnsupportedLiteral(
UnsupportedLiteralReason::DeprecatedKvPair,
false,
),
);
sess.parse_sess.emit_err(session_diagnostics::UnsupportedLiteral {
span: lit.span,
reason: UnsupportedLiteralReason::DeprecatedKvPair,
is_bytestr: false,
start_point_span: sess
.parse_sess
.source_map()
.start_point(lit.span),
});
continue 'outer;
}
}
@ -885,7 +841,7 @@ pub fn find_deprecation(
if is_rustc {
if since.is_none() {
handle_errors(&sess.parse_sess, attr.span, AttrError::MissingSince);
sess.parse_sess.emit_err(session_diagnostics::MissingSince { span: attr.span });
continue;
}