From 71f5636cb2122e9917f2f0498660fa973b0109d6 Mon Sep 17 00:00:00 2001
From: webfansplz <308241863@qq.com>
Date: Wed, 26 Oct 2022 22:20:04 +0800
Subject: [PATCH] fix(compiler-sfc): Optimize the value of emitIdentifier

---
 packages/compiler-sfc/src/compileScript.ts       |  5 ++++-
 .../__snapshots__/compileScript.spec.ts.snap     | 16 ++++++++++++++++
 packages/compiler-sfc/test/compileScript.spec.ts | 13 +++++++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/packages/compiler-sfc/src/compileScript.ts b/packages/compiler-sfc/src/compileScript.ts
index 548fc592423..e2a3fbe5726 100644
--- a/packages/compiler-sfc/src/compileScript.ts
+++ b/packages/compiler-sfc/src/compileScript.ts
@@ -414,7 +414,10 @@ export function compileScript(
     }
 
     if (declId) {
-      emitIdentifier = scriptSetup!.content.slice(declId.start!, declId.end!)
+      emitIdentifier =
+        declId.type === 'Identifier'
+          ? declId.name
+          : scriptSetup!.content.slice(declId.start!, declId.end!)
     }
 
     return true
diff --git a/packages/compiler-sfc/test/__snapshots__/compileScript.spec.ts.snap b/packages/compiler-sfc/test/__snapshots__/compileScript.spec.ts.snap
index bb52a66b907..bcecdb4efb5 100644
--- a/packages/compiler-sfc/test/__snapshots__/compileScript.spec.ts.snap
+++ b/packages/compiler-sfc/test/__snapshots__/compileScript.spec.ts.snap
@@ -558,6 +558,22 @@ export default /*#__PURE__*/_defineComponent({
 
       
       
+return { emit }
+}
+
+})"
+`;
+
+exports[`SFC compile <script setup> > with TypeScript > defineEmits w/ type (interface ts type) 1`] = `
+"import { defineComponent as _defineComponent } from 'vue'
+interface Emits { (e: 'foo'): void }
+      
+export default /*#__PURE__*/_defineComponent({
+  emits: ['foo'],
+  setup(__props, { emit }) {
+
+      
+      
 return { emit }
 }
 
diff --git a/packages/compiler-sfc/test/compileScript.spec.ts b/packages/compiler-sfc/test/compileScript.spec.ts
index 7924c83d4eb..e1a9bba0848 100644
--- a/packages/compiler-sfc/test/compileScript.spec.ts
+++ b/packages/compiler-sfc/test/compileScript.spec.ts
@@ -1081,6 +1081,19 @@ const emit = defineEmits(['a', 'b'])
       expect(content).toMatch(`emits: ["foo", "bar"]`)
     })
 
+    // https://github.com/vuejs/core/issues/5393
+    test('defineEmits w/ type (interface ts type)', () => {
+      const { content } = compile(`
+      <script setup lang="ts">
+      interface Emits { (e: 'foo'): void }
+      const emit: Emits = defineEmits(['foo'])
+      </script>
+      `)
+      assertCode(content)
+      expect(content).toMatch(`setup(__props, { emit }) {`)
+      expect(content).toMatch(`emits: ['foo']`)
+    })
+
     test('runtime Enum', () => {
       const { content, bindings } = compile(
         `<script setup lang="ts">