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|
use super::*;
pub (crate) fn is_path_start(p: &Parser) -> bool {
AnyOf(&[IDENT, SELF_KW, SUPER_KW, COLONCOLON]).is_ahead(p)
}
pub(crate) fn use_path(p: &mut Parser) {
if !is_path_start(p) {
return;
}
let mut prev = p.mark();
node(p, PATH, |p| {
path_segment(p, true);
});
many(p, |p| {
let curr = p.mark();
if p.current() == COLONCOLON && !items::is_use_tree_start(p.raw_lookahead(1)) {
node(p, PATH, |p| {
p.bump();
path_segment(p, false);
p.forward_parent(prev, curr);
prev = curr;
});
true
} else {
false
}
});
}
fn path_segment(p: &mut Parser, first: bool) {
node(p, PATH_SEGMENT, |p| {
if first {
p.eat(COLONCOLON);
}
match p.current() {
IDENT | SELF_KW | SUPER_KW => {
p.bump();
},
_ => {
p.error()
.message("expected identifier")
.emit();
}
};
})
}
|
