finished working through sass mixins to mimic less pass by function.

sass/_mixins-fullpalette.scss

@@ -1,130 +1,13 @@
-// usage: @include variations(unquote(" .check"), color, transparent);
+@import 'mixins-shared';
-@mixin variations($extra, $property, $default) {
-  @include generic-variations($extra, $default) {
-    #{$property}: $material-color !default;
-  }
-;
-}
 
-@mixin background-variations($extra, $default) {
+@mixin generic-variations-colors($mixin-name, $extra, $default, $contrast-factor, $property) {
-  @include generic-variations($extra, $default) {
-    background-color: $material-color;
-    @if ($material-color == $btn-default) {
-      color: $lightbg-text;
-    } @else {
-      color: $material-text-color;
-    }
-  };
-}
-
-@mixin text-variations($extra, $default) {
-  @include generic-variations($extra, $default) {
-    color: $material-color;
-  }
-;
-}
-
-//
-// To use this mixin you should pass a function as final parameter to define
-// the style. In that definition you can use the following variables to define it.
-//
-// $material-color-name ---> "red", "green", "indigo" ...
-// $material-color-full-name ---> "red", "green-50", "indigo-400" ...
-// $material-color ---> #f44336, #e8f5e9, #5c6bc0 ...
-// $material-text-color ---> rgba(255,255,255,0.84), rgba(0,0,0,0.84), rgba(255,255,255,0.84) ...
-//
-
-@mixin generic-variations($extra, $default) {
-
-  $contrast-factor: 40% !default;
-
-  // bootstrap styles
-  &#{$extra}, &-default#{$extra} {
-    $material-color-name: "default" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $default !default;
-    $material-text-color: $darkbg-text !default;
-    @content
-  }
-  &-black#{$extra} {
-    $material-color-name: "black" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $black !default;
-    $material-text-color: $darkbg-text !default;
-    @content
-  }
-  &-white#{$extra} {
-    $material-color-name: "white" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $white !default;
-    $material-text-color: $lightbg-text !default;
-    @content
-  }
-  &-inverse#{$extra} {
-    $material-color-name: "inverse" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $inverse !default;
-    $material-text-color: contrast($inverse, $lightbg-text, $darkbg-text, $contrast-factor) !default;
-    @content
-  }
-  &-primary#{$extra} {
-    $material-color-name: "primary" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $primary !default;
-    $material-text-color: $darkbg-text !default;
-    @content
-  }
-  &-success#{$extra} {
-    $material-color-name: "success" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $success !default;
-    $material-text-color: $darkbg-text !default;
-    @content
-  }
-  &-info#{$extra} {
-    $material-color-name: "info" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $info !default;
-    $material-text-color: $darkbg-text !default;
-    @content
-  }
-  &-warning#{$extra} {
-    $material-color-name: "warning" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $warning !default;
-    $material-text-color: $darkbg-text !default;
-    @content
-  }
-  &-danger#{$extra} {
-    $material-color-name: "danger" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $danger !default;
-    $material-text-color: $darkbg-text !default;
-    @content
-  }
-
-  @include generic-variations-colors($extra, $default, $contrast-factor)
-}
-
-@mixin generic-variations-colors($extra, $default, $contrast-factor) {
 
   $material-color-names: "red" "pink" "purple" "deep-purple" "indigo" "blue" "light-blue" "cyan" "teal" "green" "light-green" "lime" "yellow" "amber" "orange" "deep-orange" "brown" "grey" "blue-grey";
   @each $material-color-name in $material-color-names {
     // given a color build multiples depths
     $material-color-numbers: "" "-50" "-100" "-200" "-300" "-400" "-500" "-600" "-700" "-800" "-900" "-A100" "-A200" "-A400" "-A700";
     @each $material-color-number in $material-color-numbers {
-      @include generic-variations-color($extra, $default, $contrast-factor, $material-color-name, $material-color-number)
+      @include generic-variations-color($mixin-name, $extra, $default, $contrast-factor, $material-color-name, $material-color-number, $property)
     }
   }
 }
-
-@mixin generic-variations-color($extra, $default, $contrast-factor, $material-color-name, $material-color-number) {
-  & -material-#{$material-color-name}#{unquote($material-color-number)}#{$extra} {
-    $material-color-full-name: "#{$material-color-name}#{$material-color-number}" !default;
-    $material-color: $material-color-full-name !default;
-    $material-text-color: contrast($material-color, $lightbg-text, $darkbg-text, $contrast-factor) !default;
-    @content
-  }
-}
-
-$all-variations: unquote("-default, -primary, -info, -success, -warning, -danger") !default;

sass/_mixins-shared.scss

@@ -0,0 +1,136 @@
+@mixin variations-content($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property) {
+  #{$property}: $material-color;
+}
+
+@mixin background-variations-content($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property) {
+  background-color: $material-color;
+  @if ($material-color == $btn-default) {
+    color: $lightbg-text;
+  } @else {
+    color: $material-text-color;
+  }
+}
+
+@mixin text-variations-content($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property) {
+  color: $material-color;
+}
+
+// interpolation of mixin-name is not allowed evidently, so we statically include based on the mixin-name given
+@mixin call-variations-content-mixin($mixin-name, $material-color-name, $material-color-full-name, $material-color, $material-text-color, $property) {
+  @if $mixin-name == variations-content {
+    @include variations-content($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  } @else if $mixin-name == background-variations-content {
+    @include background-variations-content($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  } @else if $mixin-name == text-variations-content {
+    @include text-variations-content($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  } @else {
+    @error "Unknown mixin: #{$mixin-name}"
+  }
+}
+
+// usage: @include variations(unquote(" .check"), color, transparent);
+@mixin variations($extra, $property, $default) {
+  @include generic-variations($extra, $default, "variations-content", $property);
+}
+
+@mixin background-variations($extra, $default) {
+  @include generic-variations($extra, $default, "background-variations-content", null);
+}
+
+@mixin text-variations($extra, $default) {
+  @include generic-variations($extra, $default, "text-variations-content", null);
+}
+
+//
+// To use this mixin you should pass a function as final parameter to define
+// the style. In that definition you can use the following variables to define it.
+//
+// $material-color-name ---> "red", "green", "indigo" ...
+// $material-color-full-name ---> "red", "green-50", "indigo-400" ...
+// $material-color ---> #f44336, #e8f5e9, #5c6bc0 ...
+// $material-text-color ---> rgba(255,255,255,0.84), rgba(0,0,0,0.84), rgba(255,255,255,0.84) ...
+//
+
+@mixin generic-variations($extra, $default, $mixin-name, $property) {
+
+  $contrast-factor: 40% !default;
+
+  // bootstrap styles
+  &#{$extra}, &-default#{$extra} {
+    $material-color-name: "default" !default;
+    $material-color-full-name: $material-color-name !default;
+    $material-color: $default !default;
+    $material-text-color: $darkbg-text !default;
+    @include call-variations-content-mixin($mixin-name, $material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  }
+  &-black#{$extra} {
+    $material-color-name: "black" !default;
+    $material-color-full-name: $material-color-name !default;
+    $material-color: $black !default;
+    $material-text-color: $darkbg-text !default;
+    @include call-variations-content-mixin($mixin-name, $material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  }
+  &-white#{$extra} {
+    $material-color-name: "white" !default;
+    $material-color-full-name: $material-color-name !default;
+    $material-color: $white !default;
+    $material-text-color: $lightbg-text !default;
+    @include call-variations-content-mixin($mixin-name, $material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  }
+  &-inverse#{$extra} {
+    $material-color-name: "inverse" !default;
+    $material-color-full-name: $material-color-name !default;
+    $material-color: $inverse !default;
+    $material-text-color: contrast($inverse, $lightbg-text, $darkbg-text, $contrast-factor) !default;
+    @include call-variations-content-mixin($mixin-name, $material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  }
+  &-primary#{$extra} {
+    $material-color-name: "primary" !default;
+    $material-color-full-name: $material-color-name !default;
+    $material-color: $primary !default;
+    $material-text-color: $darkbg-text !default;
+    @include call-variations-content-mixin($mixin-name, $material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  }
+  &-success#{$extra} {
+    $material-color-name: "success" !default;
+    $material-color-full-name: $material-color-name !default;
+    $material-color: $success !default;
+    $material-text-color: $darkbg-text !default;
+    @include call-variations-content-mixin($mixin-name, $material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  }
+  &-info#{$extra} {
+    $material-color-name: "info" !default;
+    $material-color-full-name: $material-color-name !default;
+    $material-color: $info !default;
+    $material-text-color: $darkbg-text !default;
+    @include call-variations-content-mixin($mixin-name, $material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  }
+  &-warning#{$extra} {
+    $material-color-name: "warning" !default;
+    $material-color-full-name: $material-color-name !default;
+    $material-color: $warning !default;
+    $material-text-color: $darkbg-text !default;
+    @include call-variations-content-mixin($mixin-name, $material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  }
+  &-danger#{$extra} {
+    $material-color-name: "danger" !default;
+    $material-color-full-name: $material-color-name !default;
+    $material-color: $danger !default;
+    $material-text-color: $darkbg-text !default;
+    @include call-variations-content-mixin($mixin-name, $material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  }
+
+  @include generic-variations-colors($mixin-name, $extra, $default, $contrast-factor, $property)
+}
+
+
+@mixin generic-variations-color($mixin-name, $extra, $default, $contrast-factor, $material-color-name, $material-color-number, $property) {
+  & -material-#{$material-color-name}#{unquote($material-color-number)}#{$extra} {
+    $material-color-full-name: "#{$material-color-name}#{$material-color-number}" !default;
+    $material-color: $material-color-full-name !default;
+    $material-text-color: contrast($material-color, $lightbg-text, $darkbg-text, $contrast-factor) !default;
+    @include call-variations-content-mixin($mixin-name, $material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
+  }
+}
+
+$all-variations: unquote("-default, -primary, -info, -success, -warning, -danger") !default;

sass/_mixins.scss

@@ -1,138 +1,17 @@
-@mixin variations-content($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property) {
+@import 'mixins-shared';
-  #{$property}: $material-color;
-}
 
-@mixin background-variations-content($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property) {
+@mixin generic-variations-colors($mixin-name, $extra, $default, $contrast-factor, $property) {
-  background-color: $material-color;
-  @if ($material-color == $btn-default) {
-    color: $lightbg-text;
-  } @else {
-    color: $material-text-color;
-  }
-}
-
-@mixin text-variations-content($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property) {
-  color: $material-color;
-}
-
-// usage: @include variations(unquote(" .check"), color, transparent);
-@mixin variations($extra, $property, $default) {
-  @include generic-variations($extra, $default, "variations-content", $property);
-}
-
-@mixin background-variations($extra, $default) {
-  @include generic-variations($extra, $default, "background-variations-content", null);
-}
-
-@mixin text-variations($extra, $default) {
-  @include generic-variations($extra, $default, "text-variations-content", null);
-}
-
-//
-// To use this mixin you should pass a function as final parameter to define
-// the style. In that definition you can use the following variables to define it.
-//
-// $material-color-name ---> "red", "green", "indigo" ...
-// $material-color-full-name ---> "red", "green-50", "indigo-400" ...
-// $material-color ---> #f44336, #e8f5e9, #5c6bc0 ...
-// $material-text-color ---> rgba(255,255,255,0.84), rgba(0,0,0,0.84), rgba(255,255,255,0.84) ...
-//
-
-@mixin generic-variations($extra, $default, $mixin-name, $property) {
-
-  $contrast-factor: 40% !default;
-
-  // bootstrap styles
-  &#{$extra}, &-default#{$extra} {
-    $material-color-name: "default" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $default !default;
-    $material-text-color: $darkbg-text !default;
-    @include #{unquote($mixin-name)}($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
-  }
-  &-black#{$extra} {
-    $material-color-name: "black" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $black !default;
-    $material-text-color: $darkbg-text !default;
-    @include #{unquote($mixin-name)}($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
-  }
-  &-white#{$extra} {
-    $material-color-name: "white" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $white !default;
-    $material-text-color: $lightbg-text !default;
-    @include #{unquote($mixin-name)}($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
-  }
-  &-inverse#{$extra} {
-    $material-color-name: "inverse" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $inverse !default;
-    $material-text-color: contrast($inverse, $lightbg-text, $darkbg-text, $contrast-factor) !default;
-    @include #{unquote($mixin-name)}($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
-  }
-  &-primary#{$extra} {
-    $material-color-name: "primary" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $primary !default;
-    $material-text-color: $darkbg-text !default;
-    @include #{unquote($mixin-name)}($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
-  }
-  &-success#{$extra} {
-    $material-color-name: "success" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $success !default;
-    $material-text-color: $darkbg-text !default;
-    @include #{unquote($mixin-name)}($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
-  }
-  &-info#{$extra} {
-    $material-color-name: "info" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $info !default;
-    $material-text-color: $darkbg-text !default;
-    @include #{unquote($mixin-name)}($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
-  }
-  &-warning#{$extra} {
-    $material-color-name: "warning" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $warning !default;
-    $material-text-color: $darkbg-text !default;
-    @include#{unquote($mixin-name)}($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property)
-  }
-  &-danger#{$extra} {
-    $material-color-name: "danger" !default;
-    $material-color-full-name: $material-color-name !default;
-    $material-color: $danger !default;
-    $material-text-color: $darkbg-text !default;
-    @include#{unquote($mixin-name)}($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property)
-  }
-
-  @include generic-variations-colors($extra, $default, $contrast-factor)
-}
-
-@mixin generic-variations-colors($extra, $default, $contrast-factor) {
 
   $material-color-names: "red" "pink" "purple" "deep-purple" "indigo" "blue" "light-blue" "cyan" "teal" "green" "light-green" "lime" "yellow" "amber" "orange" "deep-orange" "brown" "grey" "blue-grey";
   @each $material-color-name in $material-color-names {
     //// given a color build multiples depths
     //$material-color-numbers: "" "-50" "-100" "-200" "-300" "-400" "-500" "-600" "-700" "-800" "-900" "-A100" "-A200" "-A400" "-A700";
     //@each $material-color-number in $material-color-numbers {
-    //  @include generic-variations-color($extra, $default, $contrast-factor, $material-color-name, $material-color-number)
+    //  @include generic-variations-color($mixin-name, $extra, $default, $contrast-factor, $material-color-name, $material-color-number)
     //}
 
     // build a single depth color palette
     $material-color-number: "";
-    @include generic-variations-color($extra, $default, $contrast-factor, $material-color-name, $material-color-number)
+    @include generic-variations-color($mixin-name, $extra, $default, $contrast-factor, $material-color-name, $material-color-number, $property)
   }
 }
-
-@mixin generic-variations-color($extra, $default, $contrast-factor, $material-color-name, $material-color-number) {
-  & -material-#{$material-color-name}#{unquote($material-color-number)}#{$extra} {
-    $material-color-full-name: "#{$material-color-name}#{$material-color-number}" !default;
-    $material-color: $material-color-full-name !default;
-    $material-text-color: contrast($material-color, $lightbg-text, $darkbg-text, $contrast-factor) !default;
-    @include #{unquote($mixin-name)}($material-color-name, $material-color-full-name, $material-color, $material-text-color, $property);
-  }
-}
-
-$all-variations: unquote("-default, -primary, -info, -success, -warning, -danger") !default;