Add support for @for rules

pkg/sass-parser/lib/index.ts

@@ -44,6 +44,7 @@ export {
   ErrorRuleProps,
   ErrorRuleRaws,
 } from './src/statement/error-rule';
+export {ForRule, ForRuleProps, ForRuleRaws} from './src/statement/for-rule';
 export {
   GenericAtRule,
   GenericAtRuleProps,

pkg/sass-parser/lib/src/sass-internal.ts

@@ -94,6 +94,13 @@ declare namespace SassInternal {
     readonly isOptional: boolean;
   }
 
+  class ForRule extends ParentStatement<Statement[]> {
+    readonly variable: string;
+    readonly from: Expression;
+    readonly to: Expression;
+    readonly isExclusive: boolean;
+  }
+
   class Stylesheet extends ParentStatement<Statement[]> {}
 
   class StyleRule extends ParentStatement<Statement[]> {
@@ -135,6 +142,7 @@ export type DebugRule = SassInternal.DebugRule;
 export type EachRule = SassInternal.EachRule;
 export type ErrorRule = SassInternal.ErrorRule;
 export type ExtendRule = SassInternal.ExtendRule;
+export type ForRule = SassInternal.ForRule;
 export type Stylesheet = SassInternal.Stylesheet;
 export type StyleRule = SassInternal.StyleRule;
 export type Interpolation = SassInternal.Interpolation;
@@ -149,6 +157,7 @@ export interface StatementVisitorObject<T> {
   visitEachRule(node: EachRule): T;
   visitErrorRule(node: ErrorRule): T;
   visitExtendRule(node: ExtendRule): T;
+  visitForRule(node: ForRule): T;
   visitStyleRule(node: StyleRule): T;
 }
 

pkg/sass-parser/lib/src/statement/__snapshots__/for-rule.test.ts.snap

@@ -0,0 +1,24 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`an @for rule toJSON 1`] = `
+{
+  "fromExpression": <bar>,
+  "inputs": [
+    {
+      "css": "@for $foo from bar to baz {}",
+      "hasBOM": false,
+      "id": "<input css _____>",
+    },
+  ],
+  "name": "for",
+  "nodes": [],
+  "params": "$foo from bar to baz",
+  "raws": {},
+  "sassType": "for-rule",
+  "source": <1:1-1:29 in 0>,
+  "to": "to",
+  "toExpression": <baz>,
+  "type": "atrule",
+  "variable": "foo",
+}
+`;