value_trait::derived

Trait ValueObjectAccessTryAsScalar

source 
pub trait ValueObjectAccessTryAsScalar {
    type Key: ?Sized;


Show 15 methods    // Required methods
    fn try_get_bool<Q>(&self, k: &Q) -> Result<Option<bool>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_i128<Q>(&self, k: &Q) -> Result<Option<i128>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_i64<Q>(&self, k: &Q) -> Result<Option<i64>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_i32<Q>(&self, k: &Q) -> Result<Option<i32>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_i16<Q>(&self, k: &Q) -> Result<Option<i16>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_i8<Q>(&self, k: &Q) -> Result<Option<i8>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_u128<Q>(&self, k: &Q) -> Result<Option<u128>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_u64<Q>(&self, k: &Q) -> Result<Option<u64>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_usize<Q>(&self, k: &Q) -> Result<Option<usize>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_u32<Q>(&self, k: &Q) -> Result<Option<u32>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_u16<Q>(&self, k: &Q) -> Result<Option<u16>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_u8<Q>(&self, k: &Q) -> Result<Option<u8>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_f64<Q>(&self, k: &Q) -> Result<Option<f64>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_f32<Q>(&self, k: &Q) -> Result<Option<f32>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;
    fn try_get_str<Q>(&self, k: &Q) -> Result<Option<&str>, TryTypeError>
       where Self::Key: Borrow<Q>,
             Q: ?Sized + Hash + Eq + Ord;

}
Expand description

try_as_* access to scalar values in an object

Required Associated Types§

source

type Key: ?Sized

The type for Objects

Required Methods§

source

fn try_get_bool<Q>(&self, k: &Q) -> Result<Option<bool>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a bool, returns an error if it isn’t bool

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_i128<Q>(&self, k: &Q) -> Result<Option<i128>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a i128, returns an error if it isn’t i128

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_i64<Q>(&self, k: &Q) -> Result<Option<i64>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a i64, returns an error if it isn’t a i64

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_i32<Q>(&self, k: &Q) -> Result<Option<i32>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a i32, returns an error if it isn’t a i32

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_i16<Q>(&self, k: &Q) -> Result<Option<i16>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a i16, returns an error if it isn’t a i16

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_i8<Q>(&self, k: &Q) -> Result<Option<i8>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a i8, returns an error if it isn’t a i8

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_u128<Q>(&self, k: &Q) -> Result<Option<u128>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a u128, returns an error if it isn’t a u128

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_u64<Q>(&self, k: &Q) -> Result<Option<u64>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a u64, returns an error if it isn’t a u64

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_usize<Q>(&self, k: &Q) -> Result<Option<usize>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a usize, returns an error if it isn’t a usize

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_u32<Q>(&self, k: &Q) -> Result<Option<u32>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a u32, returns an error if it isn’t a u32

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_u16<Q>(&self, k: &Q) -> Result<Option<u16>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a u16, returns an error if it isn’t a u16

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_u8<Q>(&self, k: &Q) -> Result<Option<u8>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a u8, returns an error if it isn’t a u8

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_f64<Q>(&self, k: &Q) -> Result<Option<f64>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a f64, returns an error if it isn’t a f64

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_f32<Q>(&self, k: &Q) -> Result<Option<f32>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a f32, returns an error if it isn’t a f32

§Errors

if the requested type doesn’t match the actual type or the value is not an object

source

fn try_get_str<Q>(&self, k: &Q) -> Result<Option<&str>, TryTypeError>
where Self::Key: Borrow<Q>, Q: ?Sized + Hash + Eq + Ord,

Tries to get an element of an object as a str, returns an error if it isn’t a str

§Errors

if the requested type doesn’t match the actual type or the value is not an object

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§