This can sometimes cause predicates to reduce to the constant values true or false, allowing the entire location path to be simplified.
有时这可能使谓词减少到常量值 true 或 false,允许简化整个位置路径。
I've come to realize our path was a false one.
但我已经明白,这是一条错误的道路。
Bool empty : If the path object contains an empty string for example, path path1 " ", then this routine returns True or False.
bool empty:如果path对象包含空字符串(例如path path1(“ ”)),则此例程将返回True。
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