fix(compiler-sfc): accept `StringLiteral` node in `defineEmit` tuple syntax (#8041)

close #8040

packages/compiler-sfc/__tests__/__snapshots__/compileScript.spec.ts.snap

@@ -1457,6 +1457,22 @@ export default /*#__PURE__*/_defineComponent({
 
       
       
+return { emit }
+}
+
+})"
+`;
+
+exports[`SFC compile <script setup> > with TypeScript > defineEmits w/ type (property syntax string literal) 1`] = `
+"import { defineComponent as _defineComponent } from 'vue'
+
+export default /*#__PURE__*/_defineComponent({
+  emits: [\\"foo:bar\\"],
+  setup(__props, { expose: __expose, emit }) {
+  __expose();
+
+      
+      
 return { emit }
 }
 

packages/compiler-sfc/__tests__/compileScript.spec.ts

@@ -1629,6 +1629,17 @@ const emit = defineEmits(['a', 'b'])
       assertCode(content)
     })
 
+    // #8040
+    test('defineEmits w/ type (property syntax string literal)', () => {
+      const { content } = compile(`
+      <script setup lang="ts">
+      const emit = defineEmits<{ 'foo:bar': [] }>()
+      </script>
+      `)
+      expect(content).toMatch(`emits: ["foo:bar"]`)
+      assertCode(content)
+    })
+
     describe('defineSlots()', () => {
       test('basic usage', () => {
         const { content } = compile(`

packages/compiler-sfc/src/compileScript.ts

@@ -2316,11 +2316,15 @@ function extractRuntimeEmits(
         hasCallSignature = true
       }
       if (t.type === 'TSPropertySignature') {
-        if (t.key.type !== 'Identifier' || t.computed) {
+        if (t.key.type === 'Identifier' && !t.computed) {
-          error(`defineEmits() type cannot use computed keys.`, t.key)
-        }
           emits.add(t.key.name)
           hasProperty = true
+        } else if (t.key.type === 'StringLiteral' && !t.computed) {
+          emits.add(t.key.value)
+          hasProperty = true
+        } else {
+          error(`defineEmits() type cannot use computed keys.`, t.key)
+        }
       }
     }
     if (hasCallSignature && hasProperty) {