Struct tarantool::proc::ReturnMsgpack

pub struct ReturnMsgpack<T>(pub T);

A wrapper type for returning custom types from stored procedures. Consider using the custom_ret attribute parameter instead (see tarantool::proc docs for examples).

using ReturnMsgpack directly

You can either return ReturnMsgpack directly:

use tarantool::proc::ReturnMsgpack;

#[tarantool::proc]
fn foo(x: i32) -> ReturnMsgpack<MyStruct> {
    ReturnMsgpack(MyStruct { x, y: x * 2 })
}

#[derive(serde::Serialize)]
struct MyStruct { x: i32, y: i32 }

implementing Return for custom type

Or you can use it to implement Return for your custom type:

use std::os::raw::c_int;
use tarantool::{proc::{Return, ReturnMsgpack}, tuple::FunctionCtx};

#[tarantool::proc]
fn foo(x: i32) -> MyStruct {
    MyStruct { x, y: x * 2 }
}

#[derive(serde::Serialize)]
struct MyStruct { x: i32, y: i32 }

impl Return for MyStruct {
    fn ret(self, ctx: FunctionCtx) -> c_int {
        ReturnMsgpack(self).ret(ctx)
    }
}

Tuple Fields

0: T

Trait Implementations

impl<T: Serialize> Return for ReturnMsgpack<T>

fn ret(self, ctx: FunctionCtx) -> c_int