Module Lwt.Infix

Instructions: Use this module in your project

In the IDE (CLion, Visual Studio Code, Xcode, etc.) you use for your DkSDK project:

Add the following to your project's dependencies/CMakeLists.txt:

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DkSDKProject_DeclareAvailable(lwt
    CONSTRAINT "= 5.6.1"
    FINDLIBS lwt lwt.unix)
DkSDKProject_MakeAvailable(lwt)

Add the Findlib::lwt library to any desired targets in src/*/CMakeLists.txt:

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target_link_libraries(YourPackage_YourLibraryName
     # ... existing libraries, if any ...
     Findlib::lwt)

Click your IDE's Build button

Not using DkSDK?

FIRST, do one or all of the following:

Run:
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```
opam install lwt.5.6.1
```

Edit your dune-project and add:

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(package
  (name YourExistingPackage)
  (depends
  ; ... existing dependenices ...
  (lwt (>= 5.6.1))))

Then run:

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dune build *.opam # if this fails, run: dune build

Edit your <package>.opam file and add:

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depends: [
  # ... existing dependencies ...
  "lwt" {>= "5.6.1"}
]

Then run:

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opam install . --deps-only

FINALLY, add the lwt library to any desired (library)and/or (executable) targets in your **/dune files:

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(library
  (name YourLibrary)
  ; ... existing library options ...
  (libraries
    ; ... existing libraries ...
    lwt))

(executable
  (name YourExecutable)
  ; ... existing executable options ...
  (libraries
    ; ... existing libraries ...
    lwt))

val(>>=) :'a t -> ``('a -> 'b t)`` -> 'b t

p >>= f is the same as Lwt.bind p f. It requires Lwt.Infix to be opened in scope:

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open Lwt.Infix

let () =
  Lwt_main.run
    (Lwt_io.(read_line stdin) >>= Lwt_io.printl)

(* ocamlfind opt -linkpkg -thread -package lwt.unix code.ml && ./a.out *)

It is recommended to use the PPX let%lwt syntax instead. This operator is the next-best choice. It is frequently found while reading existing Lwt code.

val(>|=) :'a t -> ``('a -> 'b)`` -> 'b t

p >|= f is the same as Lwt.map f p. It requires Lwt.Infix to be opened in scope.

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open Lwt.Infix

let () =
  Lwt_main.run
    (Lwt_io.(read_line stdin) >|= ignore)

(* ocamlfind opt -linkpkg -thread -package lwt.unix code.ml && ./a.out *)

val(<&>) : ``unitt ->``unitt ->``unitt

p1 <&> p2 is the same as Lwt.join [p1; p2]. It requires Lwt.Infix to be opened in scope.

Unlike with Lwt.bind and Lwt.map, there are no problems with explicit Lwt.join syntax, so using this operator is not recommended.

val`() :`'a t -> 'a t -> 'a t

p1 p2 is the same as Lwt.choose [p1; p2]. It requires Lwt.Infix to be opened in scope.

Unlike with Lwt.bind and Lwt.map, there are no problems with explicit Lwt.choose syntax, so using this operator is not recommended.

Furthermore, most users actually need Lwt.pick instead of Lwt.choose.

val (=<<) : ``('a -> 'b t)`` -> 'a t -> 'b t

f =<< p is the same as Lwt.bind p f. It requires Lwt.Infix to be opened in scope.

This operator is obscure and its use is discouraged. It is the same as p >>= f.

val (=|<) : ``('a -> 'b)`` -> 'a t -> 'b t

f =|< p is the same as Lwt.map f p. It requires Lwt.Infix to be opened in scope.

This operator is obscure and its use is discouraged. It is the same as p >|= f.

module Let_syntax:sig...end

This module provides support for ppx_let.

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