use NestingSelector everywhere, include in SimpleSelector

packages/svelte/src/compiler/phases/1-parse/read/style.js

@@ -162,7 +162,7 @@ function read_selector_list(parser, inside_pseudo_class = false) {
 function read_selector(parser, inside_pseudo_class = false) {
 	const list_start = parser.index;
 
-	/** @type {Array<import('#compiler').Css.SimpleSelector | import('#compiler').Css.Combinator | import('#compiler').Css.NestingSelector>} */
+	/** @type {Array<import('#compiler').Css.SimpleSelector | import('#compiler').Css.Combinator>} */
 	const children = [];
 
 	while (parser.index < parser.template.length) {
@@ -170,7 +170,7 @@ function read_selector(parser, inside_pseudo_class = false) {
 
 		if (parser.eat('&')) {
 			children.push({
-				type: 'NestedSelector',
+				type: 'NestingSelector',
 				name: '&',
 				start,
 				end: parser.index

packages/svelte/src/compiler/phases/2-analyze/css/Selector.js

@@ -872,7 +872,7 @@ function group_selectors(selector, parent_selector) {
 
 	if (parent_selector) {
 		const nested_rule_indices = selector.children
-			.map((child, index) => (child.type === 'NestedSelector' ? index : -1))
+			.map((child, index) => (child.type === 'NestingSelector' ? index : -1))
 			.filter((index) => index !== -1);
 
 		const parent_children = parent_selector.node.children.map((child) => ({
@@ -900,7 +900,7 @@ function group_selectors(selector, parent_selector) {
 		if (child.type === 'Combinator') {
 			block = new Block(child);
 			blocks.push(block);
-		} else if (child.type === 'NestedSelector') {
+		} else if (child.type === 'NestingSelector') {
 			// Don't think we need to add it here
 		} else {
 			block.add(child);

packages/svelte/src/compiler/types/css.d.ts

@@ -25,7 +25,7 @@ export interface SelectorList extends BaseNode {
 
 export interface Selector extends BaseNode {
 	type: 'Selector';
-	children: Array<SimpleSelector | Combinator | NestingSelector>;
+	children: Array<SimpleSelector | Combinator>;
 }
 
 export interface TypeSelector extends BaseNode {
@@ -72,6 +72,11 @@ export interface Nth extends BaseNode {
 	value: string;
 }
 
+export interface NestingSelector extends BaseNode {
+	type: 'NestingSelector';
+	name: '&';
+}
+
 export type SimpleSelector =
 	| TypeSelector
 	| IdSelector
@@ -80,18 +85,14 @@ export type SimpleSelector =
 	| PseudoElementSelector
 	| PseudoClassSelector
 	| Percentage
-	| Nth;
+	| Nth
+	| NestingSelector;
 
 export interface Combinator extends BaseNode {
 	type: 'Combinator';
 	name: string;
 }
 
-export interface NestingSelector extends BaseNode {
-	type: 'NestedSelector';
-	name: '&';
-}
-
 export interface Block extends BaseNode {
 	type: 'Block';
 	children: Array<Declaration | Rule | Atrule>;