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 path = p.start(); path_segment(p, true); let mut qual = path.complete(p, PATH); loop { if p.at(COLONCOLON) && !items::is_use_tree_start(p.nth(1)) { let path = qual.precede(p); p.bump(); path_segment(p, false); let path = path.complete(p, PATH); qual = path; } else { break; } } } fn path_segment(p: &mut Parser, first: bool) { let segment = p.start(); if first { p.eat(COLONCOLON); } match p.current() { IDENT | SELF_KW | SUPER_KW => p.bump(), _ => p.error().message("expected identifier").emit(), }; segment.complete(p, PATH_SEGMENT); }