From 4cda3620de9e45bac459c4c40343405a4670fb14 Mon Sep 17 00:00:00 2001
From: Marcel Greter <marcel.greter@ocbnet.ch>
Date: Thu, 13 Dec 2018 00:11:40 +0100
Subject: [PATCH] Add deprecation for hsla with percentage alpha

---
 src/fn_colors.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/src/fn_colors.cpp b/src/fn_colors.cpp
index ea2e28ff9..f074528dc 100644
--- a/src/fn_colors.cpp
+++ b/src/fn_colors.cpp
@@ -17,6 +17,16 @@ namespace Sass {
              starts_with(str, "var(");
     }
 
+    void hsla_alpha_percent_deprecation(const ParserState& pstate, const std::string val)
+    {
+
+      std::string msg("Passing a percentage as the alpha value to hsla() will be interpreted");
+      std::string tail("differently in future versions of Sass. For now, use " + val + " instead.");
+
+      deprecated(msg, tail, false, pstate);
+
+    }
+
     Signature rgb_sig = "rgb($red, $green, $blue)";
     BUILT_IN(rgb)
     {
@@ -211,6 +221,15 @@ namespace Sass {
         );
       }
 
+      Number_Ptr alpha = ARG("$alpha", Number);
+      if (alpha && alpha->unit() == "%") {
+        Number_Obj val = SASS_MEMORY_COPY(alpha);
+        val->numerators.clear(); // convert
+        val->value(val->value() / 100.0);
+        std::string nr(val->to_string(ctx.c_options));
+        hsla_alpha_percent_deprecation(pstate, nr);
+      }
+
       return SASS_MEMORY_NEW(Color_HSLA,
         pstate,
         ARGVAL("$hue"),