Crate function_compose

Crate function-compose provides utilities for composing functions and way to inject arguments to functions The composeable functions should return rust Result type with FnError as Err type

Usage

use function_compose::composeable;
#[composeable()]
pub fn add_10(a: i32) -> Result<i32, FnError> {
    Ok(a + 10)
}

The async function should return BoxFuture and the error type should be FnError.

use function_compose::composeable;
use futures::{future::BoxFuture, FutureExt};
#[composeable()]
pub fn add_async(a: i32, b: i32) -> BoxFuture<'static, Result<i32, FnError>> {
    async move {
        let r = a + b;
        Ok(r)
    }.boxed()
}

Composing async and sync functions usage

 use function_compose::compose;
 use fn_macros::composeable;
 use futures::{future::BoxFuture, FutureExt};
 #[composeable()]
 pub fn add_async(a: i32, b: i32) -> BoxFuture<'static, Result<i32, FnError>> {
     async move {
         let r = a + b;
         Ok(r)
     }.boxed()
 }
 #[composeable()]
 pub fn add_10(a: i32) -> Result<i32, FnError> {
     Ok(a + 10)
 }
 async fn test(){
    let result = compose!(add_async.provide(10) -> add_100 -> with_args(10)).await;
    assert_eq!(210, result.unwrap());
 }

Function argument injection usage

 use function_compose::composeable;
 use futures::{future::BoxFuture, FutureExt};
 #[composeable()]
 pub fn add_3_arg_async(a: i32,b: i32, c:i32) -> BoxFuture<'static, Result<i32, FnError>>{
     async move{
         let  r =   a + b + c;
         Ok(r)
     }.boxed()
 }

Example of multiple injection to async function

 use crate::compose;
 let result = compose!(add_3_arg_async.provide(100).provide(200) -> add_10 -> with_args(10)).await;
 assert_eq!(220, result.unwrap());

Modules

• macros

Macros

• c1
• compose
• concat_idents
  This macros makes it possible to concatenate identifiers at compile time and use them as normal. It’s an extension/replacement of std::concat_idents, since in comprassion to the std-solution, the idents here can be used everywhere.
• paste

Structs

• FnError

Enums

• ErrorType

Traits

• Injector
• Then
  trait Then allows you to compose functions. Type param A represents the function arg of Self

Functions

• lift_async_fn1
  Function to box FnOnce sync function with 1 aguments and coerce it to BoxedAsyncFn1
• lift_async_fn2
  Function to box FnOnce sync function with 2 aguments and coerce it to BoxedAsyncFn2
• lift_async_fn3
  Function to box FnOnce sync function with 3 aguments and coerce it to BoxedAsyncFn3
• lift_async_fn4
  Function to box FnOnce sync function with 4 aguments and coerce it to BoxedAsyncFn4
• lift_async_fn5
  Function to box FnOnce sync function with 5 aguments and coerce it to BoxedAsyncFn5
• lift_async_fn6
  Function to box FnOnce sync function with 6 aguments and coerce it to BoxedAsyncFn6
• lift_async_fn7
  Function to box FnOnce sync function with 7 aguments and coerce it to BoxedAsyncFn7
• lift_async_fn8
  Function to box FnOnce sync function with 8 aguments and coerce it to BoxedAsyncFn8
• lift_sync_fn1
  Function to box FnOnce sync function with 1 aguments and coerce it to BoxedFn1
• lift_sync_fn2
  Function to box FnOnce sync function with 2 aguments and coerce it to BoxedFn2
• lift_sync_fn3
  Function to box FnOnce sync function with 3 aguments and coerce it to BoxedFn3
• lift_sync_fn4
  Function to box FnOnce sync function with 4 aguments and coerce it to BoxedFn4
• lift_sync_fn5
  Function to box FnOnce sync function with 5 aguments and coerce it to BoxedFn5
• lift_sync_fn6
  Function to box FnOnce sync function with 6 aguments and coerce it to BoxedFn6
• lift_sync_fn7
  Function to box FnOnce sync function with 7 aguments and coerce it to BoxedFn7
• lift_sync_fn8
  Function to box FnOnce sync function with 8 aguments and coerce it to BoxedFn8
• provider_async_f2
  dependency injection function provider_async_f2 for injecting the last argument of a given async function
• provider_async_f3
  dependency injection function provider_async_f3 for injecting the last argument of a given async function
• provider_async_f4
  dependency injection function provider_async_f4 for injecting the last argument of a given async function
• provider_async_f5
  dependency injection function provider_async_f5 for injecting the last argument of a given async function
• provider_async_f6
  dependency injection function provider_async_f6 for injecting the last argument of a given async function
• provider_async_f7
  dependency injection function provider_async_f7 for injecting the last argument of a given async function
• provider_async_f8
  dependency injection function provider_async_f8 for injecting the last argument of a given async function
• provider_f2
  dependency injection function provide_f2 for injecting the last argument of a given sync function
• provider_f3
  dependency injection function provide_f3 for injecting the last argument of a given sync function
• provider_f4
  dependency injection function provide_f4 for injecting the last argument of a given sync function
• provider_f5
  dependency injection function provide_f5 for injecting the last argument of a given sync function
• provider_f6
  dependency injection function provide_f6 for injecting the last argument of a given sync function
• provider_f7
  dependency injection function provide_f7 for injecting the last argument of a given sync function
• provider_f8
  dependency injection function provide_f8 for injecting the last argument of a given sync function

Type Aliases

• BoxedAsyncFn1
  Type alias BoxedAsyncFn1 for Boxed FnOnce async function1 arguments
• BoxedAsyncFn2
  Type alias BoxedAsyncFn2 for Boxed FnOnce async function2 arguments
• BoxedAsyncFn3
  Type alias BoxedAsyncFn3 for Boxed FnOnce async function3 arguments
• BoxedAsyncFn4
  Type alias BoxedAsyncFn4 for Boxed FnOnce async function4 arguments
• BoxedAsyncFn5
  Type alias BoxedAsyncFn5 for Boxed FnOnce async function5 arguments
• BoxedAsyncFn6
  Type alias BoxedAsyncFn6 for Boxed FnOnce async function6 arguments
• BoxedAsyncFn7
  Type alias BoxedAsyncFn7 for Boxed FnOnce async function7 arguments
• BoxedAsyncFn8
  Type alias BoxedAsyncFn8 for Boxed FnOnce async function8 arguments
• BoxedFn1
  Type alias BoxedFn1 for Boxed FnOnce sync function with 1 arguments
• BoxedFn2
  Type alias BoxedFn2 for Boxed FnOnce sync function with 2 arguments
• BoxedFn3
  Type alias BoxedFn3 for Boxed FnOnce sync function with 3 arguments
• BoxedFn4
  Type alias BoxedFn4 for Boxed FnOnce sync function with 4 arguments
• BoxedFn5
  Type alias BoxedFn5 for Boxed FnOnce sync function with 5 arguments
• BoxedFn6
  Type alias BoxedFn6 for Boxed FnOnce sync function with 6 arguments
• BoxedFn7
  Type alias BoxedFn7 for Boxed FnOnce sync function with 7 arguments
• BoxedFn8
  Type alias BoxedFn8 for Boxed FnOnce sync function with 8 arguments

Attribute Macros

• composeable
• retry