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extract parse_dot_base_expr

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This commit is contained in:
Mazdak Farrokhzad 2019-12-07 02:01:58 +01:00
parent bc95228f1b
commit 7ae12c9385
1 changed files with 10 additions and 13 deletions
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23
src/librustc_parse/parser/expr.rs
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@ -692,30 +692,27 @@ impl<'a> Parser<'a> {
}
}
fn parse_dot_or_call_expr_with_(&mut self, e0: P<Expr>, lo: Span) -> PResult<'a, P<Expr>> {
let mut e = e0;
fn parse_dot_or_call_expr_with_(&mut self, mut e: P<Expr>, lo: Span) -> PResult<'a, P<Expr>> {
loop {
// expr?
while self.eat(&token::Question) {
let hi = self.prev_span;
e = self.mk_expr(lo.to(hi), ExprKind::Try(e), AttrVec::new());
if self.eat(&token::Question) {
// `expr?`
e = self.mk_expr(lo.to(self.prev_span), ExprKind::Try(e), AttrVec::new());
continue;
}
// expr.f
if self.eat(&token::Dot) {
// expr.f
e = self.parse_dot_suffix_expr(lo, e)?;
continue;
}
if self.expr_is_complete(&e) {
break;
return Ok(e);
}
match self.token.kind {
token::OpenDelim(token::Paren) => e = self.parse_fn_call_expr(lo, e),
token::OpenDelim(token::Bracket) => e = self.parse_index_expr(lo, e)?,
e = match self.token.kind {
token::OpenDelim(token::Paren) => self.parse_fn_call_expr(lo, e),
token::OpenDelim(token::Bracket) => self.parse_index_expr(lo, e)?,
_ => return Ok(e),
}
}
return Ok(e);
}
fn parse_dot_suffix_expr(&mut self, lo: Span, base: P<Expr>) -> PResult<'a, P<Expr>> {