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rustc_parse: Use Token::ident where possible

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This commit is contained in:
Vadim Petrochenkov 2020-03-04 23:37:52 +03:00
parent 2cb0b8582e
commit 925e9a2188
7 changed files with 88 additions and 94 deletions
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12
src/librustc_parse/parser/diagnostics.rs
View file

@ -192,17 +192,19 @@ impl<'a> Parser<'a> {
TokenKind::CloseDelim(token::DelimToken::Brace),
TokenKind::CloseDelim(token::DelimToken::Paren),
];
if let token::Ident(name, false) = self.normalized_token.kind {
if Ident::new(name, self.normalized_token.span).is_raw_guess()
&& self.look_ahead(1, |t| valid_follow.contains(&t.kind))
match self.token.ident() {
Some((ident, false))
if ident.is_raw_guess()
&& self.look_ahead(1, |t| valid_follow.contains(&t.kind)) =>
{
err.span_suggestion(
self.normalized_token.span,
ident.span,
"you can escape reserved keywords to use them as identifiers",
format!("r#{}", name),
format!("r#{}", ident.name),
Applicability::MaybeIncorrect,
);
}
_ => {}
}
if let Some(token_descr) = super::token_descr_opt(&self.token) {
err.span_label(self.token.span, format!("expected identifier, found {}", token_descr));

50
src/librustc_parse/parser/expr.rs
View file

@ -97,9 +97,10 @@ impl<'a> Parser<'a> {
fn parse_expr_catch_underscore(&mut self) -> PResult<'a, P<Expr>> {
match self.parse_expr() {
Ok(expr) => Ok(expr),
Err(mut err) => match self.normalized_token.kind {
token::Ident(name, false)
if name == kw::Underscore && self.look_ahead(1, |t| t == &token::Comma) =>
Err(mut err) => match self.token.ident() {
Some((ident, false))
if ident.name == kw::Underscore
&& self.look_ahead(1, |t| t == &token::Comma) =>
{
// Special-case handling of `foo(_, _, _)`
err.emit();
@ -331,21 +332,19 @@ impl<'a> Parser<'a> {
///
/// Also performs recovery for `and` / `or` which are mistaken for `&&` and `||` respectively.
fn check_assoc_op(&self) -> Option<Spanned<AssocOp>> {
Some(Spanned {
node: match (AssocOp::from_token(&self.token), &self.normalized_token.kind) {
(Some(op), _) => op,
(None, token::Ident(sym::and, false)) => {
self.error_bad_logical_op("and", "&&", "conjunction");
AssocOp::LAnd
}
(None, token::Ident(sym::or, false)) => {
self.error_bad_logical_op("or", "||", "disjunction");
AssocOp::LOr
}
_ => return None,
},
span: self.normalized_token.span,
})
let (op, span) = match (AssocOp::from_token(&self.token), self.token.ident()) {
(Some(op), _) => (op, self.token.span),
(None, Some((ident, false))) if ident.name == sym::and => {
self.error_bad_logical_op("and", "&&", "conjunction");
(AssocOp::LAnd, ident.span)
}
(None, Some((ident, false))) if ident.name == sym::or => {
self.error_bad_logical_op("or", "||", "disjunction");
(AssocOp::LOr, ident.span)
}
_ => return None,
};
Some(source_map::respan(span, op))
}
/// Error on `and` and `or` suggesting `&&` and `||` respectively.
@ -1907,20 +1906,23 @@ impl<'a> Parser<'a> {
/// Use in case of error after field-looking code: `S { foo: () with a }`.
fn find_struct_error_after_field_looking_code(&self) -> Option<Field> {
if let token::Ident(name, _) = self.normalized_token.kind {
if !self.token.is_reserved_ident() && self.look_ahead(1, |t| *t == token::Colon) {
return Some(ast::Field {
ident: Ident::new(name, self.normalized_token.span),
match self.token.ident() {
Some((ident, is_raw))
if (is_raw || !ident.is_reserved())
&& self.look_ahead(1, |t| *t == token::Colon) =>
{
Some(ast::Field {
ident,
span: self.token.span,
expr: self.mk_expr_err(self.token.span),
is_shorthand: false,
attrs: AttrVec::new(),
id: DUMMY_NODE_ID,
is_placeholder: false,
});
})
}
_ => None,
}
None
}
fn recover_struct_comma_after_dotdot(&mut self, span: Span) {

19
src/librustc_parse/parser/item.rs
View file

@ -750,10 +750,10 @@ impl<'a> Parser<'a> {
}
fn parse_ident_or_underscore(&mut self) -> PResult<'a, ast::Ident> {
match self.normalized_token.kind {
token::Ident(name @ kw::Underscore, false) => {
match self.token.ident() {
Some((ident, false)) if ident.name == kw::Underscore => {
self.bump();
Ok(Ident::new(name, self.normalized_prev_token.span))
Ok(ident)
}
_ => self.parse_ident(),
}
@ -1609,15 +1609,12 @@ impl<'a> Parser<'a> {
/// Returns the parsed optional self parameter and whether a self shortcut was used.
fn parse_self_param(&mut self) -> PResult<'a, Option<Param>> {
// Extract an identifier *after* having confirmed that the token is one.
let expect_self_ident = |this: &mut Self| {
match this.normalized_token.kind {
// Preserve hygienic context.
token::Ident(name, _) => {
this.bump();
Ident::new(name, this.normalized_prev_token.span)
}
_ => unreachable!(),
let expect_self_ident = |this: &mut Self| match this.token.ident() {
Some((ident, false)) => {
this.bump();
ident
}
_ => unreachable!(),
};
// Is `self` `n` tokens ahead?
let is_isolated_self = |this: &Self, n| {

8
src/librustc_parse/parser/mod.rs
View file

@ -480,9 +480,9 @@ impl<'a> Parser<'a> {
}
fn parse_ident_common(&mut self, recover: bool) -> PResult<'a, ast::Ident> {
match self.normalized_token.kind {
token::Ident(name, _) => {
if self.token.is_reserved_ident() {
match self.token.ident() {
Some((ident, is_raw)) => {
if !is_raw && ident.is_reserved() {
let mut err = self.expected_ident_found();
if recover {
err.emit();
@ -491,7 +491,7 @@ impl<'a> Parser<'a> {
}
}
self.bump();
Ok(Ident::new(name, self.normalized_prev_token.span))
Ok(ident)
}
_ => Err(match self.prev_token.kind {
TokenKind::DocComment(..) => {

6
src/librustc_parse/parser/path.rs
View file

@ -240,10 +240,10 @@ impl<'a> Parser<'a> {
}
pub(super) fn parse_path_segment_ident(&mut self) -> PResult<'a, Ident> {
match self.normalized_token.kind {
token::Ident(name, _) if name.is_path_segment_keyword() => {
match self.token.ident() {
Some((ident, false)) if ident.is_path_segment_keyword() => {
self.bump();
Ok(Ident::new(name, self.normalized_prev_token.span))
Ok(ident)
}
_ => self.parse_ident(),
}