pub enum Is {
    Null,
    NotNull,
    True,
    NotTrue,
    False,
    NotFalse,
    Unknown,
    NotUnknown,
}Expand description
Type of is expression
Variants
Null
NotNull
True
NotTrue
False
NotFalse
Unknown
NotUnknown
Trait Implementations
Auto Trait Implementations
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
    T: ?Sized, 
 
impl<T> BorrowMut<T> for T where
    T: ?Sized, 
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
 
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more