Struct rand_core::Error [−][src]
pub struct Error { /* fields omitted */ }Expand description
Error type of random number generators
In order to be compatible with std and no_std, this type has two
possible implementations: with std a boxed Error trait object is stored,
while with no_std we merely store an error code.
Implementations
Construct from any type supporting std::error::Error
Available only when configured with std.
See also From<NonZeroU32>, which is available with and without std.
Reference the inner error (std only)
When configured with std, this is a trivial operation and never
panics. Without std, this method is simply unavailable.
Unwrap the inner error (std only)
When configured with std, this is a trivial operation and never
panics. Without std, this method is simply unavailable.
Codes below this point represent OS Errors (i.e. positive i32 values).
Codes at or above this point, but below Error::CUSTOM_START are
reserved for use by the rand and getrandom crates.
Codes at or above this point can be used by users to define their own custom errors.
Extract the raw OS error code (if this error came from the OS)
This method is identical to std::io::Error::raw_os_error(), except
that it works in no_std contexts. If this method returns None, the
error value can still be formatted via the Diplay implementation.
Retrieve the error code, if any.
If this Error was constructed via From<NonZeroU32>, then this method
will return this NonZeroU32 code (for no_std this is always the
case). Otherwise, this method will return None.
Trait Implementations
Performs the conversion.