Function checkInvalidScopeReference

packages/compiler-sfc/src/compileScript.ts:282–297

(node: Node | undefined, method: string)

  }

  function checkInvalidScopeReference(node: Node | undefined, method: string) {
    if (!node) return
    walkIdentifiers(node, id => {
      const binding = setupBindings[id.name]
      if (binding && binding !== BindingTypes.LITERAL_CONST) {
        ctx.error(
          `\`${method}()\` in <script setup> cannot reference locally ` +
            `declared variables because it will be hoisted outside of the ` +
            `setup() function. If your component options require initialization ` +
            `in the module scope, use a separate normal <script> to export ` +
            `the options instead.`,
          id,
        )
      }
    })
  }

  const scriptAst = ctx.scriptAst
  const scriptSetupAst = ctx.scriptSetupAst!