From 6039575d199bf7326007194ab57fb2a6e1ee173a Mon Sep 17 00:00:00 2001
From: Ben Griffith <gt11687@gmail.com>
Date: Sat, 14 May 2016 18:27:58 +0100
Subject: [PATCH] :bug: Add interpolation support to pseudo-classes for Sass

---
 src/sass/parse.js | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/src/sass/parse.js b/src/sass/parse.js
index c6c04e60..ae54217f 100644
--- a/src/sass/parse.js
+++ b/src/sass/parse.js
@@ -3467,6 +3467,9 @@ function checkPseudoClass3(i) {
   if (l = checkSC(i)) i += l;
 
   if (l = checkUnary(i)) i += l;
+
+  if (l = checkInterpolation(i)) i += l;
+
   if (i >= tokensLength) return 0;
   if (tokens[i].type === TokenType.DecimalNumber) i++;
 
@@ -3477,14 +3480,18 @@ function checkPseudoClass3(i) {
   if (l = checkSC(i)) i += l;
 
   if (i >= tokensLength) return 0;
-  if (tokens[i].value === '+' ||
-      tokens[i].value === '-') i++;
+
+  if (tokens[i].type === TokenType.PlusSign ||
+      tokens[i].type === TokenType.HyphenMinus) i++;
   else return 0;
 
   if (l = checkSC(i)) i += l;
 
+  if (l = checkInterpolation(i)) i += l;
+
   if (tokens[i].type === TokenType.DecimalNumber) i++;
-  else return 0;
+
+  if (l = checkInterpolation(i)) i += l;
 
   if (l = checkSC(i)) i += l;
 
@@ -3512,6 +3519,7 @@ function getPseudoClass3() {
   pos++;
 
   if (checkUnary(pos)) value.push(getUnary());
+  if (checkInterpolation(pos)) value.push(getInterpolation());
   if (checkNumber(pos)) value.push(getNumber());
 
   {
@@ -3525,8 +3533,10 @@ function getPseudoClass3() {
 
   value = value.concat(getSC());
   if (checkUnary(pos)) value.push(getUnary());
+  if (checkInterpolation(pos)) value.push(getInterpolation());
   value = value.concat(getSC());
   if (checkNumber(pos)) value.push(getNumber());
+  if (checkInterpolation(pos)) value.push(getInterpolation());
   value = value.concat(getSC());
 
   let end = getLastPosition(value, l, c, 1);
@@ -3565,6 +3575,9 @@ function checkPseudoClass4(i) {
   if (l = checkSC(i)) i += l;
 
   if (l = checkUnary(i)) i += l;
+
+  if (l = checkInterpolation(i)) i += l;
+
   if (tokens[i].type === TokenType.DecimalNumber) i++;
 
   if (tokens[i].value === 'n') i++;
@@ -3596,6 +3609,7 @@ function getPseudoClass4() {
   pos++;
 
   if (checkUnary(pos)) value.push(getUnary());
+  if (checkInterpolation(pos)) value.push(getInterpolation());
   if (checkNumber(pos)) value.push(getNumber());
   if (checkIdent(pos)) value.push(getIdent());
   value = value.concat(getSC());