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)