feat(compiler): expression prefixing + v-for scope analysis

packages/compiler-core/src/index.ts

@@ -8,7 +8,8 @@ import { transformFor } from './transforms/vFor'
 import { prepareElementForCodegen } from './transforms/element'
 import { transformOn } from './transforms/vOn'
 import { transformBind } from './transforms/vBind'
-import { rewriteExpression } from './transforms/expression'
+import { expressionTransform } from './transforms/expression'
+import { defaultOnError, createCompilerError, ErrorCodes } from './errors'
 
 export type CompilerOptions = ParserOptions & TransformOptions & CodegenOptions
 
@@ -17,13 +18,21 @@ export function compile(
   options: CompilerOptions = {}
 ): CodegenResult {
   const ast = isString(template) ? parse(template, options) : template
+  const useWith = __BROWSER__ || options.useWith !== false
+
+  if (__BROWSER__ && options.useWith === false) {
+    ;(options.onError || defaultOnError)(
+      createCompilerError(ErrorCodes.X_STRIP_WITH_NOT_SUPPORTED)
+    )
+  }
 
   transform(ast, {
     ...options,
+    useWith,
     nodeTransforms: [
-      ...(!__BROWSER__ && options.useWith === false ? [rewriteExpression] : []),
       transformIf,
       transformFor,
+      ...(useWith ? [] : [expressionTransform]),
       prepareElementForCodegen,
       ...(options.nodeTransforms || []) // user transforms
     ],