Trait Arguments 

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

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

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

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<(), Box<dyn Error + Sync + Send>>

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>(&self, writer: &mut W) -> Result<(), Error>

where W: Write,

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

impl<'q> Arguments<'q> for AnyArguments<'q>

type Database = Any

impl<'q> Arguments<'q> for MySqlArguments

type Database = MySql

impl<'q> Arguments<'q> for PgArguments

type Database = Postgres

impl<'q> Arguments<'q> for SqliteArguments<'q>

type Database = Sqlite