Longident.3o - Man Page

Long identifiers, used in parsetree.


Module   Longident


Module Longident
: sig end

Long identifiers, used in parsetree.

Warning: this module is unstable and part of Compiler_libs .

type t =
| Lident of string
| Ldot of t * string
| Lapply of t * t

val flatten : t -> string list

val unflatten : string list -> t option

For a non-empty list l , unflatten l is Some lid where lid is the long identifier created by concatenating the elements of l with Ldot . unflatten [] is None .

val last : t -> string

val parse : string -> t

This function is broken on identifiers that are not just "Word.Word.word"; for example, it returns incorrect results on infix operators and extended module paths.

If you want to generate long identifiers that are a list of dot-separated identifiers, the function Longident.unflatten is safer and faster. Longident.unflatten is available since OCaml 4.06.0.

If you want to parse any identifier correctly, use the long-identifiers functions from the Parse module, in particular Parse.longident . They are available since OCaml 4.11, and also provide proper input-location support.

To print a longident, see Pprintast.longident , using Format.asprintf to convert to a string.


2021-01-26 OCamldoc OCaml library