From dc73e0a578d600ee2a20bb87cc9b23112dcd89b4 Mon Sep 17 00:00:00 2001
From: Adam Wathan <adam.wathan@gmail.com>
Date: Fri, 4 Aug 2017 09:19:17 -0400
Subject: [PATCH] Add extract-match mixin

Works similar to apply-match but exports the @__match variable to the
parent scope instead of accepting a ruleset. I have a suspicion that
this will generally be easier to wield and produce more predictable
results than all the crazy extra scoping bullshit I always have to try
and do when using the "closure"-ish approach I use with apply-match.
---
 src/generators/_matching.less | 14 ++++++++++++++
 src/utilities/misc.less       |  9 ++++-----
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/src/generators/_matching.less b/src/generators/_matching.less
index 9de841308..cea975260 100644
--- a/src/generators/_matching.less
+++ b/src/generators/_matching.less
@@ -14,3 +14,17 @@
     @ruleset();
   }
 }
+
+.extract-match(@map; @search) {
+  @current: extract(extract(@map, 1), 1);
+  .extract-match(@map; @search; @current; 1);
+}
+
+.extract-match(@map; @search; @current; @i) when not (@search = @current) and (@i <= length(@map)) {
+  @current: extract(extract(@map, @i + 1), 1);
+  .extract-match(@map; @search; @current; @i + 1);
+}
+
+.extract-match(@map; @search; @current; @i) when (@search = @current) and (@i <= length(@map)) {
+  @__match: extract(extract(@map, @i), 2);
+}
diff --git a/src/utilities/misc.less b/src/utilities/misc.less
index 55a06a7f9..861b4e3a8 100644
--- a/src/utilities/misc.less
+++ b/src/utilities/misc.less
@@ -16,11 +16,10 @@
 }
 
 .screen(@screen, @ruleset) {
-  .apply-match(@screens; @screen; {
-    @media (min-width: @__match) {
-      @ruleset();
-    }
-  });
+  .extract-match(@screens; @screen);
+  @media (min-width: @__match) {
+    @ruleset();
+  }
 }
 
 .no-focus {