This library provides a simple interface for reading user input in OCaml programs. The goal of this project is to reduce the burden of reading user input for programming language REPLs.

The feature that makes this library particularly useful is its handling of brackets. Any brackets that are opened must be closed before input is accepted. This library uses ocaml-linenoise to provide rlwrap like functionality, including command history, arrow navigation, etc.

Example

Source Code:

read ~brackets:['(',')'] ~prompt:"lisp>" ()

Command Line:

lisp> (lambda
          (x)
          (+ x 1))
lisp>

API

val read :  ?trim_delim:bool ->
            ?brackets:(char * char) list ->
            ?prompt:string ->
            ?strings:char list ->
            ?history_loc:string ->
            ?hints_callback:(string -> (string * LNoise.hint_color * bool) option) ->
            ?completion_callback:(string -> LNoise.completions -> unit) ->
            ?delim:string ->
            unit ->
            string

Parameter	Description	Default Value
trim_delim	Whether or not to remove the line delimiter from the return value.	false
brackets	Any characters that once opened must be closed before the line is accepted	[]
prompt	Customizes the prompt displayed to the user.	">"
strings	String delimiters. If brackets are in strings, they won't have to be closed.	[]
history_loc	Where to store the history for the user commands	".ocamline_history.txt"
hints_callback	Linenoise's hints callback. See here	No op
completion_callback	Linenoise's completion callback. See here	No op
delim	The string that, when found, halts scanning and returns the input.	"" (* newlines *)

Contributions

Contributions to ocamline are greatly appreciated! ❤️

Please try to keep its implementation unassuming and configurable. 🙂