Trait ValT 

pub trait ValT:
    ValT
    + Ord
    + From<f64>
    + From<usize> {
    // Required methods
    fn into_seq<S: FromIterator<Self>>(self) -> Result<S, Self>;
    fn is_int(&self) -> bool;
    fn as_isize(&self) -> Option<isize>;
    fn as_f64(&self) -> Option<f64>;
    fn is_utf8_str(&self) -> bool;
    fn as_bytes(&self) -> Option<&[u8]>;
    fn as_sub_str(&self, sub: &[u8]) -> Self;
    fn from_utf8_bytes(b: impl AsRef<[u8]> + Send + 'static) -> Self;

    // Provided methods
    fn as_utf8_bytes(&self) -> Option<&[u8]> { ... }
    fn try_as_bytes(&self) -> Result<&[u8], Error<Self>> { ... }
    fn try_as_utf8_bytes(&self) -> Result<&[u8], Error<Self>> { ... }
}

Values that the standard library can operate on.

Required Methods

fn into_seq<S: FromIterator<Self>>(self) -> Result<S, Self>

Convert an array into a sequence.

This returns the original value as Err if it is not an array.

fn is_int(&self) -> bool

True if the value is integer.

fn as_isize(&self) -> Option<isize>

Use the value as machine-sized integer.

If this function returns Some(_), then Self::is_int must return true. However, the other direction must not necessarily be the case, because there may be integer values that are not representable by isize.

fn as_f64(&self) -> Option<f64>

Use the value as floating-point number.

This succeeds for all numeric values, rounding too large/small ones to +/- Infinity.

fn is_utf8_str(&self) -> bool

True if the value is interpreted as UTF-8 string.

fn as_bytes(&self) -> Option<&[u8]>

If the value is a string (whatever its interpretation), return its bytes.

fn as_sub_str(&self, sub: &[u8]) -> Self

If the value is a string and sub points to a slice of the string, shorten the string to sub, else panic.

fn from_utf8_bytes(b: impl AsRef<[u8]> + Send + 'static) -> Self

Interpret bytes as UTF-8 string value.

Provided Methods

fn as_utf8_bytes(&self) -> Option<&[u8]>

If the value is interpreted as UTF-8 string, return its bytes.

fn try_as_bytes(&self) -> Result<&[u8], Error<Self>>

If the value is a string (whatever its interpretation), return its bytes, else fail.

fn try_as_utf8_bytes(&self) -> Result<&[u8], Error<Self>>

If the value is interpreted as UTF-8 string, return its bytes, else fail.

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