此模式适合在document样式的WSDL中使用，但并不适合rpc样式，因为未定义全局级别的类型。
This schema fits into a document-style WSDL but is not well suited for RPC style since there is no global level type defined.
如果代码的改变在被重构的方法内部引发了问题——变量未定义，或者类型不匹配——重构操作将对这些问题进行标记。
If the changes cause problems in the method being refactored — because it leaves undefined variables or mismatched types — the refactoring operations will flag these.
spu_promote((unsigned int)5, 1) 创建了一个 unsigned int 类型的向量，其中第二个元素（元素 1）为 5，其他元素尚未定义。
spu_promote((unsigned int)5, 1) creates a vector of unsigned ints with 5 in the second element (element 1), and the remaining elements undefined.
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