add ExpressionMetadata type

packages/svelte/src/compiler/phases/1-parse/state/element.js

@@ -507,9 +507,10 @@ function read_attribute(parser) {
 				end: parser.index,
 				expression,
 				parent: null,
-				metadata: {
-					contains_call_expression: false,
-					dynamic: false
+				effect: {
+					is_dynamic: false,
+					has_call_expression: false,
+					bindings: new Set()
 				}
 			};
 
@@ -537,9 +538,10 @@ function read_attribute(parser) {
 					name
 				},
 				parent: null,
-				metadata: {
-					dynamic: false,
-					contains_call_expression: false
+				effect: {
+					has_call_expression: false,
+					is_dynamic: false,
+					bindings: new Set()
 				}
 			};
 

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

@@ -316,6 +316,12 @@ export interface Binding {
 	} | null;
 }
 
+export interface ExpressionMetadata {
+	dependencies: Set<Binding>;
+	has_state: boolean;
+	has_call: boolean;
+}
+
 export * from './template.js';
 export { Css };
 

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

@@ -1,4 +1,4 @@
-import type { Binding, Css } from '#compiler';
+import type { Binding, Css, EffectMetadata } from '#compiler';
 import type {
 	ArrayExpression,
 	ArrowFunctionExpression,
@@ -110,14 +110,7 @@ export interface Text extends BaseNode {
 export interface ExpressionTag extends BaseNode {
 	type: 'ExpressionTag';
 	expression: Expression;
-	metadata: {
-		contains_call_expression: boolean;
-		/**
-		 * Whether or not the expression contains any dynamic references —
-		 * determines whether it will be updated in a render effect or not
-		 */
-		dynamic: boolean;
-	};
+	effect: EffectMetadata;
 }
 
 /** A (possibly reactive) HTML template expression — `{@html ...}` */
@@ -463,10 +456,7 @@ export interface Attribute extends BaseNode {
 export interface SpreadAttribute extends BaseNode {
 	type: 'SpreadAttribute';
 	expression: Expression;
-	metadata: {
-		contains_call_expression: boolean;
-		dynamic: boolean;
-	};
+	effect: EffectMetadata;
 }
 
 export type TemplateNode =