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Format (refmt)

refmt stands by Reason Formatter and it formats Reason programs, is a parser and pretty-printer for Reason.

refmt can easily convert Reason code to OCaml code and vice versa, since Reason and OCaml are compatible on the AST-level.

Comes inside the reason package from the opam repository.

Installation

opam install reason

Usage

It comes integrated automatically in dune, so you don't need to do anything to use it, but you can use it directly from the command line via refmt directly or via dune.

dune build @fmt
# or
refmt

Help

REFMT(1)                         Refmt Manual                         REFMT(1)

NAME
       refmt - Reason´s Parser & Pretty-printer

SYNOPSIS
       refmt [OPTION]... [FILENAMES]...

DESCRIPTION
       refmt lets you format Reason files, parse them, and convert them
       between OCaml syntax and Reason syntax.

ARGUMENTS
       FILENAMES
           input files; if empty, assume stdin

OPTIONS
       -e, --assume-explicit-arity
           if a constructor´s argument is a tuple, always interpret it as
           multiple arguments

       -h VAL, --heuristics-file=VAL
           load path as a heuristics file to specify which constructors carry
           a tuple rather than multiple arguments. Mostly used in removing
           [@implicit_arity] introduced from OCaml conversion. example.txt:
           Constructor1 Constructor2

       --help[=FMT] (default=pager)
           Show this help in format FMT (pager, plain or groff).

       -i VAL, --interface=VAL (absent=false)
           parse AST as an interface

       --in-place
           reformat a file in-place

       -p FORM, --print=FORM (absent=re)
           print AST in FORM, which is one of: (ml | re (default) | binary
           (for compiler input) | binary_reason (for interchange between
           Reason versions) | ast (print human readable AST directly) | none)

       --parse=FORM
           parse AST in FORM, which is one of: (ml | re | binary (for compiler
           input) | binary_reason (for interchange between Reason versions))

       -r, --recoverable
           enable recoverable parser

       --version
           Show version information.

       -w COLS, --print-width=COLS (absent=80 or REFMT_PRINT_WIDTH env)
           wrapping width for printing the AST

ENVIRONMENT VARIABLES
       REFMT_PRINT_WIDTH
           wrapping width for printing the AST

Refmt Reason 3.10.0 @ 747c8c3                                         REFMT(1)