fix(compiler-sfc): support resolve enum value for defineEmits

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

@@ -30,6 +30,26 @@ return { emit }
 })"
 `;
 
+exports[`defineEmits > w/ type (enum) 1`] = `
+"import { defineComponent as _defineComponent } from 'vue'
+enum Foo { BAR = 'bar' }
+    interface Emits {
+      (e: Foo.BAR, value: string): void;
+    }
+    
+export default /*#__PURE__*/_defineComponent({
+  emits: [\\"bar\\"],
+  setup(__props, { expose: __expose, emit }) {
+  __expose();
+
+    
+    
+return { Foo, emit }
+}
+
+})"
+`;
+
 exports[`defineEmits > w/ type (exported interface) 1`] = `
 "import { defineComponent as _defineComponent } from 'vue'
 export interface Emits { (e: 'foo' | 'bar'): void }

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

@@ -89,6 +89,20 @@ const emit = defineEmits(['a', 'b'])
     expect(content).toMatch(`emits: ["foo", "bar"]`)
   })
 
+  test('w/ enum value', () => {
+    const { content } = compile(`
+    <script setup lang="ts">
+    enum Foo { BAR = 'bar' }
+    interface Emits {
+      (e: Foo.BAR, value: string): void;
+    }
+    const emit = defineEmits<Emits>()
+    </script>
+    `)
+    assertCode(content)
+    expect(content).toMatch(`emits: ["bar"]`)
+  })
+
   test('w/ type from normal script', () => {
     const { content } = compile(`
     <script lang="ts">

packages/compiler-sfc/src/script/defineEmits.ts

@@ -112,6 +112,12 @@ function extractEventNames(
         ) {
           emits.add(String(type.literal.value))
         }
+      } else if (type.type === 'TSEnumDeclaration') {
+        for (const m of type.members) {
+          if (m.initializer && m.initializer.type === 'StringLiteral') {
+            emits.add(String(m.initializer.value))
+          }
+        }
       }
     }
   }

packages/compiler-sfc/src/script/resolveType.ts

@@ -650,21 +650,35 @@ function innerResolveTypeReference(
       }
     }
   } else {
-    let ns = innerResolveTypeReference(ctx, scope, name[0], node, onlyExported)
-    if (ns) {
-      if (ns.type !== 'TSModuleDeclaration') {
-        // namespace merged with other types, attached as _ns
-        ns = ns._ns
-      }
-      if (ns) {
-        const childScope = moduleDeclToScope(ctx, ns, ns._ownerScope || scope)
-        return innerResolveTypeReference(
-          ctx,
-          childScope,
-          name.length > 2 ? name.slice(1) : name[name.length - 1],
-          node,
-          !ns.declare
-        )
+    let resolved = innerResolveTypeReference(
+      ctx,
+      scope,
+      name[0],
+      node,
+      onlyExported
+    )
+    if (resolved) {
+      if (resolved.type === 'TSEnumDeclaration') {
+        return resolved
+      } else {
+        if (resolved.type !== 'TSModuleDeclaration') {
+          // namespace merged with other types, attached as _ns
+          resolved = resolved._ns
+        }
+        if (resolved) {
+          const childScope = moduleDeclToScope(
+            ctx,
+            resolved,
+            resolved._ownerScope || scope
+          )
+          return innerResolveTypeReference(
+            ctx,
+            childScope,
+            name.length > 2 ? name.slice(1) : name[name.length - 1],
+            node,
+            !resolved.declare
+          )
+        }
       }
     }
   }