ppxlib

Standard library for ppx rewriters
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Library ppxlib
Module Ppxlib . Driver . Cookies
type t
val get : t -> string -> ( Astlib.Ast_500.Parsetree.expression, 'a -> 'a, 'b ) Ast_pattern.t -> 'b option

get cookies name pattern look for a cookie named name and parse it using pattern. Raises if the parsing fails.

val get_res : t -> string -> ( Astlib.Ast_500.Parsetree.expression, 'a -> 'a, 'b ) Ast_pattern.t -> ( 'b option, Location.Error.t Stdppx.NonEmptyList.t ) result

get cookies name pattern look for a cookie named name and parse it using pattern, returning a result instead of raising when the parsing fails.

val set : t -> string -> Astlib.Ast_500.Parsetree.expression -> unit

set cookies name expr set cookie name to expr.

val add_handler : ( t -> unit ) -> unit

Register a callback that is called before a rewriting. The handler is expected to lookup some cookies and set some global variables.

This API is a temporary hack to allow to migrate from add_arg to the use of cookie, until ppxlib has been upgraded to pass cookies through.

val add_simple_handler : string -> ( Astlib.Ast_500.Parsetree.expression, 'a -> 'a, 'b ) Ast_pattern.t -> f:( 'b option -> unit ) -> unit

Shorthand for: add_handler (fun t -> f (get t name pattern))

val add_post_handler : ( t -> unit ) -> unit

Register a callback that is called after a rewriting. The handler is expected to set some cookies from some global variables.