#CODE FORMATTER INSTALL#

When the input is #f, the formatter map should Return a formatter that will format a form named s, and (If you want to implement one, perhaps take a look atĪ formatter map is a function that accepts either a string or #f,Ĭonceptually, when the input is a string s, a formatter map should That are currently undocumented and unstable. In principle, you can create your own formatter, but you need to understand many structures Given the file 'example.rkt' shown on the left, running raco fmt -width 40 example.rkt would output the program on the right:Ī formatter is a function that accepts a code fragment and returns a doc?. This flag has no effect if raco fmt accepts the input from the standard input. i - modify the input files in-place instead of outputting to standard output. indent ‹ n› - set the indentation level for subsequent lines to ‹ n›, To ‹ n›, which must be either a natural number or +inf.0. max-blank-lines ‹ n› - set the maximum consecutive blank lines limit Which must be either a natural number or +inf.0. width ‹ width› - set the page width limit to ‹ width›, The raco fmt command accepts the following flags: If ‹ file.rkt›s are not given, it accepts an input program from the standard input. reads ‹ file.rkt›s and displays the formatted programs to the standard output.

#CODE FORMATTER INSTALL#

Run raco pkg install fmt to install the formatter. Make sure Racket 8.0 or later is installed. For now, the only thing that is stable is the command raco fmt. The interface to allow users to extend formatting style is extremely unstable and is still a work in progress. The package uses pprint-compact, a very expressive pretty printer library, to compute the most optimal layout of the output code, and uses syntax-color/module-lexer to lex the input program. This package provides a tool raco fmt to reformat Racket code.

Code formatter