test: add a test case for #3782

Author: johnsoncodehk

test-workspace/tsc/vue2/tsconfig.json

@@ -17,6 +17,7 @@
 		"../vue3/#3615",
 		"../vue3/#3656",
 		"../vue3/#3672",
+		"../vue3/#3782",
 		"../vue3/#4327",
 		"../vue3/components",
 		"../vue3/defineEmits",

test-workspace/tsc/vue3.3/tsconfig.json

@@ -7,4 +7,7 @@
 		"env.d.ts",
 		"../vue3",
 	],
+	"exclude": [
+		"../vue3/#3782",
+	],
 }

test-workspace/tsc/vue3/#3782/main.vue

@@ -0,0 +1,20 @@
+<script setup lang="ts">
+import { defineComponent } from 'vue';
+
+export const Test = defineComponent(
+	<TStr extends "one" | "two", TNum extends TStr extends "one" ? 1 : 2>(props: {
+		str: TStr;
+		num: TNum;
+		numFn: (num: TNum) => TNum;
+	}) => {
+		return () => props.str;
+	}
+);
+</script>
+
+<template>
+	<!-- val is `1` -->
+	<Test str="one" :num="1" :numFn="val => val" />
+	<!-- val is `2` -->
+	<Test str="two" :num="2" :numFn="val => val" />
+</template>