error: there are no arguments to ‘size‘ that depend on a template parameter, so a declaration of ‘si

完整的错误： error: there are no arguments to ‘size’ that depend on a template parameter, so a declaration of ‘size’ must be available [-fpermissive] T pop() { return remove ( size() - 1 ); } 这是在使用之前编译通过的Ve

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