Enum ParameterDirection 

pub enum ParameterDirection {
    In,
    Out,
    InOut,
    Variadic,
}

Which way a parameter carries its value.

Variants

In

Read by the routine. The only direction a function’s parameters take.

Out

Written by the routine and read by its caller.

InOut

Both.

Variadic

Any number of values of the parameter’s type, collected into the last parameter.

Trait Implementations

impl Clone for ParameterDirection

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ParameterDirection

impl Debug for ParameterDirection

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ParameterDirection

fn default() -> Self

Returns the “default value” for a type.

impl Eq for ParameterDirection

impl PartialEq for ParameterDirection

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ParameterDirection