fix errors

documentation/docs/98-reference/.generated/compile-errors.md

@@ -573,7 +573,13 @@ Unrecognised compiler option %keypath%
 ### props_duplicate
 
 ```
-Cannot use `%rune%` more than once
+Cannot use `%rune%()` more than once
+```
+
+### props_id_invalid_placement
+
+```
+`$props.id()` can only be affected at the top level of components as a const declaration initializer
 ```
 
 ### props_illegal_name
@@ -597,7 +603,7 @@ Declaring or accessing a prop starting with `$$` is illegal (they are reserved f
 ### props_invalid_placement
 
 ```
-`%rune%` can only be used at the top level of components as a variable declaration initializer
+`$props()` can only be used at the top level of components as a variable declaration initializer
 ```
 
 ### reactive_declaration_cycle

packages/svelte/messages/compile-errors/script.md

@@ -120,7 +120,11 @@ This turned out to be buggy and unpredictable, particularly when working with de
 
 ## props_duplicate
 
-> Cannot use `%rune%` more than once
+> Cannot use `%rune%()` more than once
+
+## props_id_invalid_placement
+
+> `$props.id()` can only be affected at the top level of components as a const declaration initializer
 
 ## props_illegal_name
 
@@ -136,7 +140,7 @@ This turned out to be buggy and unpredictable, particularly when working with de
 
 ## props_invalid_placement
 
-> `%rune%` can only be used at the top level of components as a variable declaration initializer
+> `$props()` can only be used at the top level of components as a variable declaration initializer
 
 ## reactive_declaration_cycle
 

packages/svelte/src/compiler/errors.js

@@ -279,13 +279,22 @@ export function module_illegal_default_export(node) {
 }
 
 /**
- * Cannot use `%rune%` more than once
+ * Cannot use `%rune%()` more than once
  * @param {null | number | NodeLike} node
  * @param {string} rune
  * @returns {never}
  */
 export function props_duplicate(node, rune) {
-	e(node, 'props_duplicate', `Cannot use \`${rune}\` more than once\nhttps://svelte.dev/e/props_duplicate`);
+	e(node, 'props_duplicate', `Cannot use \`${rune}()\` more than once\nhttps://svelte.dev/e/props_duplicate`);
+}
+
+/**
+ * `$props.id()` can only be affected at the top level of components as a const declaration initializer
+ * @param {null | number | NodeLike} node
+ * @returns {never}
+ */
+export function props_id_invalid_placement(node) {
+	e(node, 'props_id_invalid_placement', `\`$props.id()\` can only be affected at the top level of components as a const declaration initializer\nhttps://svelte.dev/e/props_id_invalid_placement`);
 }
 
 /**
@@ -316,13 +325,12 @@ export function props_invalid_pattern(node) {
 }
 
 /**
- * `%rune%` can only be used at the top level of components as a variable declaration initializer
+ * `$props()` can only be used at the top level of components as a variable declaration initializer
  * @param {null | number | NodeLike} node
- * @param {string} rune
  * @returns {never}
  */
-export function props_invalid_placement(node, rune) {
-	e(node, 'props_invalid_placement', `\`${rune}\` can only be used at the top level of components as a variable declaration initializer\nhttps://svelte.dev/e/props_invalid_placement`);
+export function props_invalid_placement(node) {
+	e(node, 'props_invalid_placement', `\`$props()\` can only be used at the top level of components as a variable declaration initializer\nhttps://svelte.dev/e/props_invalid_placement`);
 }
 
 /**

packages/svelte/src/compiler/phases/2-analyze/visitors/CallExpression.js

@@ -65,7 +65,7 @@ export function CallExpression(node, context) {
 				context.state.ast_type !== 'instance' ||
 				context.state.scope !== context.state.analysis.instance.scope
 			) {
-				e.props_invalid_placement(node, rune);
+				e.props_invalid_placement(node);
 			}
 
 			if (node.arguments.length > 0) {
@@ -74,7 +74,9 @@ export function CallExpression(node, context) {
 
 			break;
 
-		case '$props.id':
+		case '$props.id': {
+			const grand_parent = get_parent(context.path, -2);
+
 			if (context.state.analysis.props_id) {
 				e.props_duplicate(node, rune);
 			}
@@ -83,9 +85,11 @@ export function CallExpression(node, context) {
 				parent.type !== 'VariableDeclarator' ||
 				parent.id.type !== 'Identifier' ||
 				context.state.ast_type !== 'instance' ||
-				context.state.scope !== context.state.analysis.instance.scope
+				context.state.scope !== context.state.analysis.instance.scope ||
+				grand_parent.type !== 'VariableDeclaration' ||
+				grand_parent.kind !== 'const'
 			) {
-				e.props_invalid_placement(node, rune);
+				e.props_id_invalid_placement(node);
 			}
 
 			if (node.arguments.length > 0) {
@@ -95,6 +99,7 @@ export function CallExpression(node, context) {
 			context.state.analysis.props_id = parent.id;
 
 			break;
+		}
 
 		case '$state':
 		case '$state.raw':