44 lines
1020 B
Rust
44 lines
1020 B
Rust
use super::*;
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pub(crate) fn is_path_start(p: &Parser) -> bool {
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AnyOf(&[IDENT, SELF_KW, SUPER_KW, COLONCOLON]).is_ahead(p)
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}
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pub(crate) fn use_path(p: &mut Parser) {
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if !is_path_start(p) {
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return;
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}
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let path = p.start();
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path_segment(p, true);
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let mut qual = path.complete(p, PATH);
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loop {
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if p.at(COLONCOLON) && !items::is_use_tree_start(p.raw_lookahead(1)) {
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let path = qual.precede(p);
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p.bump();
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path_segment(p, false);
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let path = path.complete(p, PATH);
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qual = path;
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} else {
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break;
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}
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}
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}
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fn path_segment(p: &mut Parser, first: bool) {
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let segment = p.start();
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if first {
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p.eat(COLONCOLON);
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}
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match p.current() {
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IDENT | SELF_KW | SUPER_KW => {
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p.bump();
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}
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_ => {
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p.error()
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.message("expected identifier")
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.emit();
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}
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};
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segment.complete(p, PATH_SEGMENT);
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}
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