fix(component-meta): defineSlots allows empty params

packages/component-meta/lib/base.ts

@@ -537,7 +537,7 @@ function createSchemaResolvers(
 		const propType = typeChecker.getNonNullableType(typeChecker.getTypeOfSymbolAtLocation(prop, symbolNode));
 		const signatures = propType.getCallSignatures();
 		const paramType = signatures[0].parameters[0];
-		const subtype = typeChecker.getTypeOfSymbolAtLocation(paramType, symbolNode);
+		const subtype = paramType ?  typeChecker.getTypeOfSymbolAtLocation(paramType, symbolNode) : typeChecker.getAnyType();
 		let schema: PropertyMetaSchema;
 		let declarations: Declaration[];
 

packages/component-meta/tests/index.spec.ts

@@ -594,6 +594,34 @@ const worker = (checker: ComponentMetaChecker, withTsconfig: boolean) => describ
 		expect(d).toBeDefined();
 	});
 
+	test('defineSlots', () => {
+		const componentPath = path.resolve(__dirname, '../../../test-workspace/component-meta/template-slots/component-define-slots.vue');
+		const meta = checker.getComponentMeta(componentPath);
+
+		expect(meta.type).toEqual(TypeMeta.Class);
+
+		const a = meta.slots.find(slot =>
+			slot.name === 'default'
+			&& slot.type === '{ num: number; }'
+		);
+		const b = meta.slots.find(slot =>
+			slot.name === 'named-slot'
+			&& slot.type === '{ str: string; }'
+		);
+		const c = meta.slots.find(slot =>
+			slot.name === 'vbind'
+			&& slot.type === '{ num: number; str: string; }'
+		);
+		const d = meta.slots.find(slot =>
+			slot.name === 'no-bind'
+		);
+
+		expect(a).toBeDefined();
+		expect(b).toBeDefined();
+		expect(c).toBeDefined();
+		expect(d).toBeDefined();
+	});
+
 	test('template-slots for generic', () => {
 		const componentPath = path.resolve(__dirname, '../../../test-workspace/component-meta/generic/component.vue');
 		const meta = checker.getComponentMeta(componentPath);

packages/tsc/tests/__snapshots__/dts.spec.ts.snap

@@ -561,6 +561,58 @@ type __VLS_WithTemplateSlots<T, S> = T & {
 "
 `;
 
+exports[`vue-tsc-dts > Input: template-slots/component-define-slots.vue, Output: template-slots/component-define-slots.vue.d.ts 1`] = `
+"import { VNode } from 'vue';
+declare const _default: __VLS_WithTemplateSlots<import("vue").DefineComponent<{}, {}, {}, {}, {}, import("vue").ComponentOptionsMixin, import("vue").ComponentOptionsMixin, {}, string, import("vue").PublicProps, Readonly<import("vue").ExtractPropTypes<{}>>, {}, {}>, Readonly<{
+    default: (props: {
+        num: number;
+    }) => VNode<import("vue").RendererNode, import("vue").RendererElement, {
+        [key: string]: any;
+    }>[];
+    'named-slot': (props: {
+        str: string;
+    }) => VNode<import("vue").RendererNode, import("vue").RendererElement, {
+        [key: string]: any;
+    }>[];
+    vbind: (props: {
+        num: number;
+        str: string;
+    }) => VNode<import("vue").RendererNode, import("vue").RendererElement, {
+        [key: string]: any;
+    }>[];
+    'no-bind': () => VNode<import("vue").RendererNode, import("vue").RendererElement, {
+        [key: string]: any;
+    }>[];
+}> & {
+    default: (props: {
+        num: number;
+    }) => VNode<import("vue").RendererNode, import("vue").RendererElement, {
+        [key: string]: any;
+    }>[];
+    'named-slot': (props: {
+        str: string;
+    }) => VNode<import("vue").RendererNode, import("vue").RendererElement, {
+        [key: string]: any;
+    }>[];
+    vbind: (props: {
+        num: number;
+        str: string;
+    }) => VNode<import("vue").RendererNode, import("vue").RendererElement, {
+        [key: string]: any;
+    }>[];
+    'no-bind': () => VNode<import("vue").RendererNode, import("vue").RendererElement, {
+        [key: string]: any;
+    }>[];
+}>;
+export default _default;
+type __VLS_WithTemplateSlots<T, S> = T & {
+    new (): {
+        $slots: S;
+    };
+};
+"
+`;
+
 exports[`vue-tsc-dts > Input: template-slots/component-no-script.vue, Output: template-slots/component-no-script.vue.d.ts 1`] = `
 "declare const _default: __VLS_WithTemplateSlots<import("vue").DefineComponent<{}, {}, {}, {}, {}, import("vue").ComponentOptionsMixin, import("vue").ComponentOptionsMixin, {}, string, import("vue").PublicProps, Readonly<import("vue").ExtractPropTypes<{}>>, {}, {}>, {
     "no-bind"?(_: {}): any;

test-workspace/component-meta/template-slots/component-define-slots.vue

@@ -0,0 +1,14 @@
+<template>
+
+</template>
+
+<script setup lang="ts">
+import { VNode, defineSlots } from 'vue'
+
+defineSlots<{
+	default: (props: {num: number}) => VNode[],
+	'named-slot': (props: {str: string}) => VNode[],
+	vbind: (props: {num: number, str: string}) => VNode[],
+	'no-bind': () => VNode[],
+}>()
+</script>