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remove reudndant function param in check_matcher_core()

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This commit is contained in:
Matthias Krüger 2022-04-13 23:03:11 +02:00
parent 75287dd73d
commit 15abc81967
1 changed files with 7 additions and 19 deletions
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26
compiler/rustc_expand/src/mbe/macro_rules.rs
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@ -478,7 +478,7 @@ pub fn compile_declarative_macro(
)
.pop()
.unwrap();
valid &= check_lhs_nt_follows(&sess.parse_sess, features, &def, &tt);
valid &= check_lhs_nt_follows(&sess.parse_sess, &def, &tt);
return tt;
}
sess.parse_sess.span_diagnostic.span_bug(def.span, "wrong-structured lhs")
@ -563,16 +563,11 @@ pub fn compile_declarative_macro(
}))
}
fn check_lhs_nt_follows(
sess: &ParseSess,
features: &Features,
def: &ast::Item,
lhs: &mbe::TokenTree,
) -> bool {
fn check_lhs_nt_follows(sess: &ParseSess, def: &ast::Item, lhs: &mbe::TokenTree) -> bool {
// lhs is going to be like TokenTree::Delimited(...), where the
// entire lhs is those tts. Or, it can be a "bare sequence", not wrapped in parens.
if let mbe::TokenTree::Delimited(_, delimited) = lhs {
check_matcher(sess, features, def, &delimited.tts)
check_matcher(sess, def, &delimited.tts)
} else {
let msg = "invalid macro matcher; matchers must be contained in balanced delimiters";
sess.span_diagnostic.span_err(lhs.span(), msg);
@ -632,16 +627,11 @@ fn check_rhs(sess: &ParseSess, rhs: &mbe::TokenTree) -> bool {
false
}
fn check_matcher(
sess: &ParseSess,
features: &Features,
def: &ast::Item,
matcher: &[mbe::TokenTree],
) -> bool {
fn check_matcher(sess: &ParseSess, def: &ast::Item, matcher: &[mbe::TokenTree]) -> bool {
let first_sets = FirstSets::new(matcher);
let empty_suffix = TokenSet::empty();
let err = sess.span_diagnostic.err_count();
check_matcher_core(sess, features, def, &first_sets, matcher, &empty_suffix);
check_matcher_core(sess, def, &first_sets, matcher, &empty_suffix);
err == sess.span_diagnostic.err_count()
}
@ -955,7 +945,6 @@ impl<'tt> TokenSet<'tt> {
// see `FirstSets::new`.
fn check_matcher_core<'tt>(
sess: &ParseSess,
features: &Features,
def: &ast::Item,
first_sets: &FirstSets<'tt>,
matcher: &'tt [mbe::TokenTree],
@ -1008,7 +997,7 @@ fn check_matcher_core<'tt>(
token::CloseDelim(d.delim),
span.close,
));
check_matcher_core(sess, features, def, first_sets, &d.tts, &my_suffix);
check_matcher_core(sess, def, first_sets, &d.tts, &my_suffix);
// don't track non NT tokens
last.replace_with_irrelevant();
@ -1040,8 +1029,7 @@ fn check_matcher_core<'tt>(
// At this point, `suffix_first` is built, and
// `my_suffix` is some TokenSet that we can use
// for checking the interior of `seq_rep`.
let next =
check_matcher_core(sess, features, def, first_sets, &seq_rep.tts, my_suffix);
let next = check_matcher_core(sess, def, first_sets, &seq_rep.tts, my_suffix);
if next.maybe_empty {
last.add_all(&next);
} else {