Fix issue where computed_prop_# collides due to const tags

src/compiler/compile/nodes/shared/Context.ts

@@ -11,7 +11,7 @@ export type Context = DestructuredVariable | ComputedProperty;
 
 interface ComputedProperty {
 	type: 'ComputedProperty';
-  property_name: string;
+  property_name: Identifier;
   key: Expression | PrivateIdentifier;
 }
  
@@ -30,8 +30,7 @@ export function unpack_destructuring({
 	default_modifier = (node) => node,
 	scope,
 	component,
-	context_rest_properties,
+	context_rest_properties
-	number_of_computed_props = { n: 0 }
 }: {
 	contexts: Context[];
 	node: Node;
@@ -40,10 +39,6 @@ export function unpack_destructuring({
 	scope: TemplateScope;
 	component: Component;
 	context_rest_properties: Map<string, Node>;
-	// we want to pass this by reference, as a sort of global variable, because 
-	// if we pass this by value, we could get computed_property_# variable collisions
-	// when we deal with nested object destructuring
-	number_of_computed_props?: { n: number }; 
 }) {
 	if (!node) return;
 
@@ -72,8 +67,7 @@ export function unpack_destructuring({
 					default_modifier,
 					scope,
 					component,
-					context_rest_properties,
+					context_rest_properties
-					number_of_computed_props
 				});
 				context_rest_properties.set((element.argument as Identifier).name, element);
 			} else if (element && element.type === 'AssignmentPattern') {
@@ -93,8 +87,7 @@ export function unpack_destructuring({
 						)}` as Node,
 					scope,
 					component,
-					context_rest_properties,
+					context_rest_properties
-					number_of_computed_props
 				});
 			} else {
 				unpack_destructuring({
@@ -104,8 +97,7 @@ export function unpack_destructuring({
 					default_modifier,
 					scope,
 					component,
-					context_rest_properties,
+					context_rest_properties
-					number_of_computed_props
 				});
 			}
 		});
@@ -124,8 +116,7 @@ export function unpack_destructuring({
 					default_modifier,
 					scope,
 					component,
-					context_rest_properties,
+					context_rest_properties
-					number_of_computed_props
 				});
 				context_rest_properties.set((property.argument as Identifier).name, property);
 			} else if (property.type === 'Property') {
@@ -136,8 +127,7 @@ export function unpack_destructuring({
 
 				if (property.computed) {
 					// e.g { [computedProperty]: ... }
-					const property_name = `computed_property_${number_of_computed_props.n}`;
+					const property_name = x`computed_property` as Identifier;
-					number_of_computed_props.n += 1;
 
 					contexts.push({
 						type: 'ComputedProperty',
@@ -178,8 +168,7 @@ export function unpack_destructuring({
 							)}` as Node,
 						scope,
 						component,
-						context_rest_properties,
+						context_rest_properties
-						number_of_computed_props
 					});
 				} else {
 					// e.g. { property } or { property: newName }
@@ -190,8 +179,7 @@ export function unpack_destructuring({
 						default_modifier,
 						scope,
 						component,
-						context_rest_properties,
+						context_rest_properties
-						number_of_computed_props
 					});
 				}
 			}

src/compiler/compile/render_dom/wrappers/AwaitBlock.ts

@@ -12,6 +12,7 @@ import { Context } from '../../nodes/shared/Context';
 import { Identifier, Literal, Node } from 'estree';
 import { add_const_tags, add_const_tags_context } from './shared/add_const_tags';
 import Expression from '../../nodes/shared/Expression';
+import { resolve_computed_prop_conflicts } from '../../utils/resolve_computed_props';
 
 type Status = 'pending' | 'then' | 'catch';
 
@@ -98,6 +99,10 @@ class AwaitBlockBranch extends Wrapper {
 	}
 
 	render_get_context() {
+    if (this.has_consts(this.node)) {
+      resolve_computed_prop_conflicts(this.block, this.value_contexts, this.node.const_tags);
+    }
+
 		const props = this.is_destructured ? this.value_contexts.map(prop => {
 			if (prop.type === 'ComputedProperty') {
 				const expression = new Expression(this.renderer.component, this.node, this.has_consts(this.node) ? this.node.scope : null, prop.key);

src/compiler/compile/render_dom/wrappers/EachBlock.ts

@@ -10,6 +10,7 @@ import { Identifier, Node } from 'estree';
 import get_object from '../../utils/get_object';
 import { add_const_tags, add_const_tags_context } from './shared/add_const_tags';
 import Expression from '../../nodes/shared/Expression';
+import { resolve_computed_prop_conflicts } from '../../utils/resolve_computed_props';
 
 export class ElseBlockWrapper extends Wrapper {
 	node: ElseBlock;
@@ -364,6 +365,8 @@ export default class EachBlockWrapper extends Wrapper {
 			this.else.fragment.render(this.else.block, null, x`#nodes` as Identifier);
 		}
 
+    resolve_computed_prop_conflicts(this.block, this.node.contexts, this.node.const_tags);
+
 		this.context_props = this.node.contexts.map(prop => {
 			if (prop.type === 'DestructuredVariable') {
 				const to_ctx = (name: string) => renderer.context_lookup.has(name) ? x`child_ctx[${renderer.context_lookup.get(name).index}]` : { type: 'Identifier', name } as Node;

src/compiler/compile/utils/resolve_computed_props.ts

@@ -0,0 +1,19 @@
+import { Context } from '../nodes/shared/Context';
+import ConstTag from '../nodes/ConstTag';
+import Block from '../render_dom/Block';
+
+export function resolve_computed_prop_conflicts(block: Block, node_contexts: Context[], node_const_tags: ConstTag[]) {
+  node_contexts.forEach((context: Context) => {
+    if (context.type === 'ComputedProperty') {
+      context.property_name.name = block.get_unique_name('computed_prop').name;
+    }
+  });
+
+  node_const_tags.forEach((const_tag: ConstTag) => {
+    const_tag.contexts.forEach((context: Context) => {
+      if (context.type === 'ComputedProperty') {
+        context.property_name.name = block.get_unique_name('computed_prop').name;
+      }
+    });
+  });
+}