Trait Arguments

pub trait Arguments<'q>:
    Send
    + Sized
    + Default {
    type Database: Database;

    // Required methods
    fn reserve(&mut self, additional: usize, size: usize);
    fn add<T>(&mut self, value: T) -> Result<(), BoxDynError>
       where T: 'q + Encode<'q, Self::Database> + Type<Self::Database>;
    fn len(&self) -> usize;

    // Provided method
    fn format_placeholder<W: Write>(&self, writer: &mut W) -> Result { ... }
}

A tuple of arguments to be sent to the database.

Required Associated Types

type Database: Database

Required Methods

fn reserve(&mut self, additional: usize, size: usize)

Reserves the capacity for at least additional more values (of size total bytes) to be added to the arguments without a reallocation.

fn add<T>(&mut self, value: T) -> Result<(), BoxDynError>

where T: 'q + Encode<'q, Self::Database> + Type<Self::Database>,

Add the value to the end of the arguments.

fn len(&self) -> usize

The number of arguments that were already added.

Provided Methods

fn format_placeholder<W: Write>(&self, writer: &mut W) -> Result

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