--- /dev/null
+# function-whitespace-after
+
+Require or disallow whitespace after functions.
+
+```css
+a { transform: translate(1, 1) scale(3); }
+/** ↑
+ * This space */
+```
+
+This rule does not check for space immediately after `)` if the very next character is `,`, `)`, or `}`, allowing some of the patterns exemplified below.
+
+## Options
+
+`string`: `"always"|"never"`
+
+### `"always"`
+
+There *must always* be whitespace after the function.
+
+The following patterns are considered violations:
+
+```css
+a { transform: translate(1, 1)scale(3); }
+```
+
+The following patterns are *not* considered violations:
+
+```css
+a { transform: translate(1, 1) scale(3); }
+```
+
+```css
+a { transform: translate(1, 1) scale(3); }
+```
+
+```css
+a {
+ transform:
+ translate(1, 1)
+ scale(3);
+}
+```
+
+```css
+/* notice the two closing parentheses without a space between */
+a { top: calc(1 * (1 + 3)); }
+```
+
+```css
+/* notice the ), with no space after the closing parenthesis */
+a { padding: calc(1 * 2px), calc(2 * 5px); }
+```
+
+```scss
+/* notice the )}, with no space after the closing parenthesis */
+a {
+ max-height: #{($line-height) * ($lines-to-show)}em;
+}
+```
+
+```less
+/* notice the )}, with no space after the closing parenthesis */
+a {
+ max-height: ((@line-height) * (@lines-to-show))em;
+}
+```
+
+### `"never"`
+
+There *must never* be whitespace after the function.
+
+The following patterns are considered violations:
+
+```css
+a { transform: translate(1, 1) scale(3); }
+```
+
+The following patterns are *not* considered violations:
+
+```css
+a { transform: translate(1, 1)scale(3); }
+```