pub struct SqlExpr<T: Display>(pub T);
保留原样的变量,不自动转义,当为自定义SQL 不能当字符串串处理时使用
0: T
TypeId
self
Returns the argument unchanged.
Calls U::from(self).
U::from(self)
That is, this conversion is whatever the implementation of From<T> for U chooses to do.
From<T> for U
Self