Rename raw_lookahead -> nth

Author: matklad

src/parser/event_parser/grammar/items.rs

@@ -14,7 +14,7 @@ fn item(p: &mut Parser) {
     let item = p.start();
     attributes::outer_attributes(p);
     visibility(p);
-    let la = p.raw_lookahead(1);
+    let la = p.nth(1);
     let item_kind = match p.current() {
         EXTERN_KW if la == CRATE_KW => {
             extern_crate_item(p);
@@ -171,7 +171,7 @@ fn use_item(p: &mut Parser) {
     p.expect(SEMI);
 
     fn use_tree(p: &mut Parser) {
-        let la = p.raw_lookahead(1);
+        let la = p.nth(1);
         let m = p.start();
         match (p.current(), la) {
             (STAR, _) => {

src/parser/event_parser/grammar/mod.rs

@@ -20,7 +20,7 @@ fn visibility(p: &mut Parser) {
         let vis = p.start();
         p.bump();
         if p.at(L_PAREN) {
-            match p.raw_lookahead(1) {
+            match p.nth(1) {
                 CRATE_KW | SELF_KW | SUPER_KW | IN_KW => {
                     p.bump();
                     if p.bump() == IN_KW {
@@ -87,13 +87,13 @@ impl Lookahead for SyntaxKind {
 
 impl Lookahead for [SyntaxKind; 2] {
     fn is_ahead(self, p: &Parser) -> bool {
-        p.current() == self[0] && p.raw_lookahead(1) == self[1]
+        p.current() == self[0] && p.nth(1) == self[1]
     }
 }
 
 impl Lookahead for [SyntaxKind; 3] {
     fn is_ahead(self, p: &Parser) -> bool {
-        p.current() == self[0] && p.raw_lookahead(1) == self[1] && p.raw_lookahead(2) == self[2]
+        p.current() == self[0] && p.nth(1) == self[1] && p.nth(2) == self[2]
     }
 }
 

src/parser/event_parser/grammar/paths.rs

@@ -12,7 +12,7 @@ pub(crate) fn use_path(p: &mut Parser) {
     path_segment(p, true);
     let mut qual = path.complete(p, PATH);
     loop {
-        if p.at(COLONCOLON) && !items::is_use_tree_start(p.raw_lookahead(1)) {
+        if p.at(COLONCOLON) && !items::is_use_tree_start(p.nth(1)) {
             let path = qual.precede(p);
             p.bump();
             path_segment(p, false);

src/parser/event_parser/parser.rs

@@ -164,12 +164,12 @@ impl<'t> Parser<'t> {
         kind
     }
 
-    pub(crate) fn raw_lookahead(&self, n: usize) -> SyntaxKind {
+    pub(crate) fn nth(&self, n: usize) -> SyntaxKind {
         self.tokens.get(self.pos + n).map(|t| t.kind).unwrap_or(EOF)
     }
 
     pub(crate) fn current(&self) -> SyntaxKind {
-        self.raw_lookahead(0)
+        self.nth(0)
     }
 
     fn event(&mut self, event: Event) {