package ocamline

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ocamline

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. 🙂

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