fix(compiler-sfc): make sure rewriteDefault get current result when use decorator before export default

Author: linshuohao

Diff for: packages/compiler-sfc/__tests__/rewriteDefault.spec.ts

@@ -152,45 +152,4 @@ describe('compiler sfc: rewriteDefault', () => {
   })
 
   test('export default class', async () => {
-    expect(rewriteDefault(`export default class Foo {}`, 'script'))
-      .toMatchInlineSnapshot(`
-      "class Foo {}
-      const script = Foo"
-    `)
-  })
-
-  test('export default class w/ comments', async () => {
-    expect(
-      rewriteDefault(`// export default\nexport default class Foo {}`, 'script')
-    ).toMatchInlineSnapshot(`
-      "// export default
-      class Foo {}
-      const script = Foo"
-    `)
-  })
-
-  test('export default class w/ comments 2', async () => {
-    expect(
-      rewriteDefault(
-        `export default {}\n` + `// export default class Foo {}`,
-        'script'
-      )
-    ).toMatchInlineSnapshot(`
-      "const script = {}
-      // export default class Foo {}"
-    `)
-  })
-
-  test('export default class w/ comments 3', async () => {
-    expect(
-      rewriteDefault(
-        `/*\nexport default class Foo {}*/\n` + `export default class Bar {}`,
-        'script'
-      )
-    ).toMatchInlineSnapshot(`
-      "/*
-      export default class Foo {}*/
-      const script = class Bar {}"
-    `)
-  })
-})
+    expect(rewriteDefault(`export d

Diff for: packages/compiler-sfc/src/rewriteDefault.ts

@@ -42,7 +42,12 @@ export function rewriteDefault(
   }).program.body
   ast.forEach(node => {
     if (node.type === 'ExportDefaultDeclaration') {
-      s.overwrite(node.start!, node.declaration.start!, `const ${as} = `)
+      if (node.declaration.type === 'ClassDeclaration') {
+        s.overwrite(node.start!, node.declaration.id.start!, `class `)
+        s.append(`\nconst ${as} = ${node.declaration.id.name}`)
+      } else {
+        s.overwrite(node.start!, node.declaration.start!, `const ${as} = `)
+      }
     }
     if (node.type === 'ExportNamedDeclaration') {
       for (const specifier of node.specifiers) {