Trait GroupFunctionTrait 

pub trait GroupFunctionTrait:
    Send
    + Sync
    + Debug
    + Display
    + FunctionTrait {
    // Required methods
    fn call(&self, input: &str) -> String;
    fn box_clone(&self) -> Box<dyn GroupFunctionTrait>;
}

User supplied Mapping function

Required Methods

fn call(&self, input: &str) -> String

calls the function

fn box_clone(&self) -> Box<dyn GroupFunctionTrait>

Creates a boxed clone of the function object (clone doesn’t work with boxed traites)

Implementors