5 pub type IdentKind = u8;
7 /// Main input to the parser.
9 /// A sequence of tokens represented internally as a struct of arrays.
12 kind: Vec<SyntaxKind>,
14 ident_kind: Vec<IdentKind>,
18 pub fn push(&mut self, was_joint: bool, kind: SyntaxKind) {
19 self.push_impl(was_joint, kind, 0)
21 pub fn push_ident(&mut self, ident_kind: IdentKind) {
22 self.push_impl(false, SyntaxKind::IDENT, ident_kind)
24 fn push_impl(&mut self, was_joint: bool, kind: SyntaxKind, ctx: IdentKind) {
26 if idx % (bits::BITS as usize) == 0 {
29 if was_joint && idx > 0 {
30 self.set_joint(idx - 1);
33 self.ident_kind.push(ctx);
35 fn set_joint(&mut self, n: usize) {
36 let (idx, b_idx) = self.bit_index(n);
37 self.joint[idx] |= 1 << b_idx;
39 fn get_joint(&self, n: usize) -> bool {
40 let (idx, b_idx) = self.bit_index(n);
41 self.joint[idx] & 1 << b_idx != 0
43 fn bit_index(&self, n: usize) -> (usize, usize) {
44 let idx = n / (bits::BITS as usize);
45 let b_idx = n % (bits::BITS as usize);
49 pub fn len(&self) -> usize {
52 pub(crate) fn get(&self, idx: usize) -> (SyntaxKind, bool, IdentKind) {
56 let kind = self.kind[idx];
57 let joint = self.get_joint(idx);
58 let ident_kind = self.ident_kind[idx];
59 (kind, joint, ident_kind)
63 fn eof(&self) -> (SyntaxKind, bool, IdentKind) {
64 (SyntaxKind::EOF, false, 0)