Fix #3616 IfStatement requires double parentheses when dividing (#3626)

* fix: fix the special parens case
* fix the issue number

Author: iChenLei

packages/less/src/less/functions/function-caller.js

@@ -32,6 +32,10 @@ class functionCaller {
                 if (item.type === 'Expression') {
                     const subNodes = item.value.filter(commentFilter);
                     if (subNodes.length === 1) {
+                        // https://github.com/less/less.js/issues/3616
+                        if (item.parens && subNodes[0].op === '/') {
+                            return item;
+                        }
                         return subNodes[0];
                     } else {
                         return new Expression(subNodes);

packages/test-data/css/math/parens-division/parens.css

@@ -1,3 +1,8 @@
+.parens-issues-3616 {
+  bar: 888 / 444;
+  bar2: 2;
+  bar3: 2;
+}
 .parens {
   border: 2px solid black;
   margin: 1px 3px 16 3;

packages/test-data/css/math/strict/parens.css

@@ -1,3 +1,8 @@
+.parens-issues-3616 {
+  bar: 888 / 444;
+  bar2: 2;
+  bar3: 2;
+}
 .parens {
   border: 2px solid black;
   margin: 1px 3px 16 3;

packages/test-data/less/math/parens-division/parens.less

@@ -1,3 +1,9 @@
+.parens-issues-3616 {
+  bar: if(false, 666, 888 / 444);
+  bar2: if(false, 666, (666 / 333));
+  bar3: if(false, 666, ((444 / 222)));
+}
+
 .parens {
   @var: 1px;
   border: (@var * 2) solid black;

packages/test-data/less/math/strict/parens.less

@@ -1,3 +1,9 @@
+.parens-issues-3616 {
+  bar: if(false, 666, 888 / 444);
+  bar2: if(false, 666, (666 / 333));
+  bar3: if(false, 666, ((444 / 222)));
+}
+
 .parens {
   @var: 1px;
   border: (@var * 2) solid black;