From 93e43a66dbb7e329bfa35d1f8d85ea24f9268eee Mon Sep 17 00:00:00 2001
From: xzyfer <xzyfer@gmail.com>
Date: Sun, 22 Feb 2015 15:30:26 +1100
Subject: [PATCH] Add support for -ms-calc

---
 constants.cpp | 1 +
 constants.hpp | 1 +
 parser.cpp    | 1 +
 3 files changed, 3 insertions(+)

diff --git a/constants.cpp b/constants.cpp
index dbddebb413..b2491c5449 100644
--- a/constants.cpp
+++ b/constants.cpp
@@ -76,6 +76,7 @@ namespace Sass {
     extern const char calc_kwd[]         = "calc(";
     extern const char moz_calc_kwd[]     = "-moz-calc(";
     extern const char webkit_calc_kwd[]  = "-webkit-calc(";
+    extern const char ms_calc_kwd[]      = "-ms-calc(";
 
     // css attribute-matching operators
     extern const char tilde_equal[]  = "~=";
diff --git a/constants.hpp b/constants.hpp
index 9036ea035e..2b15bf158d 100644
--- a/constants.hpp
+++ b/constants.hpp
@@ -78,6 +78,7 @@ namespace Sass {
     extern const char calc_kwd[];
     extern const char moz_calc_kwd[];
     extern const char webkit_calc_kwd[];
+    extern const char ms_calc_kwd[];
 
     // css attribute-matching operators
     extern const char tilde_equal[];
diff --git a/parser.cpp b/parser.cpp
index 1344166cec..f1251d36af 100644
--- a/parser.cpp
+++ b/parser.cpp
@@ -1103,6 +1103,7 @@ namespace Sass {
     }
     else if (peek< exactly< calc_kwd > >() ||
              peek< exactly< moz_calc_kwd > >() ||
+             peek< exactly< ms_calc_kwd > >() ||
              peek< exactly< webkit_calc_kwd > >()) {
       return parse_calc_function();
     }