package ppxlib_jane

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package ppxlib_jane

ppxlib_jane
- Ppxlib_jane

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Language extensions provided by the Jane Street version of the OCaml compiler.

This is the signature of the Language_extension_kernel module that is directly imported into ppxlib_jane.

type maturity =

| Stable
| Beta
| Alpha

type _ t =

| Comprehensions : unit t
| Mode : unit t
| Unique : unit t
| Include_functor : unit t
| Polymorphic_parameters : unit t
| Immutable_arrays : unit t
| Module_strengthening : unit t
| Layouts : maturity t
| SIMD : unit t
| Labeled_tuples : unit t
| Small_numbers : unit t

The type of language extensions. An 'a t is an extension that can either be off or be set to have any value in 'a, so a unit t can be either on or off, while a maturity t can have different maturity settings.

module Exist : sig ... end

module Exist_pair : sig ... end

val to_string : _ t -> string

Print and parse language extensions; parsing is case-insensitive

val of_string : string -> Exist.t option

val pair_of_string : string -> Exist_pair.t option

val maturity_to_string : maturity -> string

val is_erasable : _ t -> bool

Check if a language extension is "erasable", i.e. whether it can be harmlessly translated to attributes and compiled with the upstream compiler.

module type Language_extension_for_jane_syntax = sig ... end

This module type defines the pieces of functionality used by Jane_syntax_parsing and Jane_syntax so that we can more easily import these modules into ppxlib_jane, without also including all of the Language_extension machinery.