From 1e1e2e83c462b7efacaa0e33812beed72a88ab5f Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Sun, 5 Aug 2018 16:09:25 +0300
Subject: compound ops

---
 src/parser_impl/input.rs | 17 ++++++++++++++++-
 src/parser_impl/mod.rs   | 19 ++++++++++++++-----
 2 files changed, 30 insertions(+), 6 deletions(-)

(limited to 'src/parser_impl')

diff --git a/src/parser_impl/input.rs b/src/parser_impl/input.rs
index db76364b2..c0fe4d488 100644
--- a/src/parser_impl/input.rs
+++ b/src/parser_impl/input.rs
@@ -36,7 +36,22 @@ impl<'t> ParserInput<'t> {
         self.tokens[idx].kind
     }
 
-    #[allow(unused)]
+    pub fn len(&self, pos: InputPosition) -> TextUnit {
+        let idx = pos.0 as usize;
+        if !(idx < self.tokens.len()) {
+            return 0.into();
+        }
+        self.tokens[idx].len
+    }
+
+    pub fn start(&self, pos: InputPosition) -> TextUnit {
+        let idx = pos.0 as usize;
+        if !(idx < self.tokens.len()) {
+            return 0.into();
+        }
+        self.start_offsets[idx]
+    }
+
     pub fn text(&self, pos: InputPosition) -> &'t str {
         let idx = pos.0 as usize;
         if !(idx < self.tokens.len()) {
diff --git a/src/parser_impl/mod.rs b/src/parser_impl/mod.rs
index 2791c8da5..d640a7784 100644
--- a/src/parser_impl/mod.rs
+++ b/src/parser_impl/mod.rs
@@ -65,6 +65,11 @@ impl<'t> ParserImpl<'t> {
         self.events
     }
 
+    pub(super) fn at_compound2(&self, c1: SyntaxKind, c2: SyntaxKind) -> bool {
+        self.inp.kind(self.pos) == c1 && self.inp.kind(self.pos + 1) == c2
+            && self.inp.start(self.pos + 1) == self.inp.start(self.pos) + self.inp.len(self.pos)
+    }
+
     pub(super) fn nth(&self, n: u32) -> SyntaxKind {
         self.inp.kind(self.pos + n)
     }
@@ -87,7 +92,7 @@ impl<'t> ParserImpl<'t> {
         if kind == EOF {
             return;
         }
-        self.do_bump(kind);
+        self.do_bump(kind, 1);
     }
 
     pub(super) fn bump_remap(&mut self, kind: SyntaxKind) {
@@ -95,14 +100,18 @@ impl<'t> ParserImpl<'t> {
             // TODO: panic!?
             return;
         }
-        self.do_bump(kind);
+        self.do_bump(kind, 1);
+    }
+
+    pub(super) fn bump_compound(&mut self, kind: SyntaxKind, n: u8) {
+        self.do_bump(kind, n);
     }
 
-    fn do_bump(&mut self, kind: SyntaxKind) {
-        self.pos += 1;
+    fn do_bump(&mut self, kind: SyntaxKind, n_raw_tokens: u8) {
+        self.pos += u32::from(n_raw_tokens);
         self.event(Event::Token {
             kind,
-            n_raw_tokens: 1,
+            n_raw_tokens,
         });
     }
 
-- 
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