Three options: 1) Implement your language in `#lang br` now (and optionally convert to `racket/base` later) [1]
2) Import the `br/datum` module into a `#lang racket/base` program to get `format-datum` [2] 3) Reimplement `format-datum` your own way. You can see the underlying code by right-clicking on `format-datum` in DrRacket and selecting "Open Defining File". [1] https://beautifulracket.com/appendix/from-br-to-racket-base.html [2] https://docs.racket-lang.org/br/index.html?q=br%2Fdatums#%28mod-path._br%2Fdatum%29 > On Apr 10, 2020, at 9:17 AM, Pratyush Das <reik...@gmail.com> wrote: > > A followup question - > > But this assumes that the br lang is being used(I think because of the > format-datum syntax). How do I implement this without using the br lang? > > ... > (define > <http://docs.racket-lang.org/reference/define.html#(form._((lib._racket/private/base..rkt)._define))> > src-lines (port->lines > <http://docs.racket-lang.org/reference/port-lib.html#(def._((lib._racket/port..rkt)._port-~3elines))> > port)) > (define > <http://docs.racket-lang.org/reference/define.html#(form._((lib._racket/private/base..rkt)._define))> > src-datums (format-datums > <http://docs.racket-lang.org/br/index.html#(def._((lib._br/datum..rkt)._format-datums))> > '(handle ~a) src-lines)) > ... > > Is it possible to use modules to just get the format-datums from the br > language? > > > On Fri, 10 Apr 2020 at 17:50, Pratyush Das <reik...@gmail.com > <mailto:reik...@gmail.com>> wrote: > I am absolutely new to both Racket and language implementation. > > I read through some portions of Beautiful Racket > <https://docs.racket-lang.org/guide/languages.html> and the racket guide > <https://docs.racket-lang.org/guide/languages.html> before trying to > implement a language on my own and this is what I understand - > > I created a main.rkt which would be the boot module in my source directory, > following the Beautiful Racket master recipe > <https://beautifulracket.com/appendix/master-recipe.html>. > > Every language should define and provide a read-syntax function. > > To make the new language read the source file, read-syntax must be defined > something like - > (define (read-syntax path port) > ...) > > Like in Beautiful Racket's wires language implementation > <https://beautifulracket.com/wires/intro.html>, I want to read the source > file line by line and wrap it in a macro. > Beautiful Racket does it like this - > (define > <http://docs.racket-lang.org/reference/define.html#(form._((lib._racket/private/base..rkt)._define))> > (read-syntax > <http://docs.racket-lang.org/reference/Reading.html#(def._((quote._~23~25kernel)._read-syntax))> > path port) > (define > <http://docs.racket-lang.org/reference/define.html#(form._((lib._racket/private/base..rkt)._define))> > wire-datums > (for/list > <http://docs.racket-lang.org/reference/for.html#(form._((lib._racket/private/base..rkt)._for/list))> > ([wire-str (in-lines > <http://docs.racket-lang.org/reference/sequences.html#(def._((lib._racket/private/base..rkt)._in-lines))> > port)]) > (format-datum > <http://docs.racket-lang.org/br/index.html#(def._((lib._br/datum..rkt)._format-datum))> > '(wire ~a) wire-str))) > > But this assumes that the br lang is being used(I think because of the > format-datum syntax). How do I implement this without using the br lang? > > Also, am I wrong in any of my assumptions so far? > > > > -- > You received this message because you are subscribed to a topic in the Google > Groups "Racket Users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/racket-users/qEXz8YcAisc/unsubscribe > <https://groups.google.com/d/topic/racket-users/qEXz8YcAisc/unsubscribe>. > To unsubscribe from this group and all its topics, send an email to > racket-users+unsubscr...@googlegroups.com > <mailto:racket-users+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/180aae4b-9e79-43cc-9177-6c917acf0dc8%40googlegroups.com > > <https://groups.google.com/d/msgid/racket-users/180aae4b-9e79-43cc-9177-6c917acf0dc8%40googlegroups.com?utm_medium=email&utm_source=footer>. > > > -- > Pratyush Das(Reik) > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users+unsubscr...@googlegroups.com > <mailto:racket-users+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/CAFzLTskQ70okYZj247VA2rGNWyoW62wCyyu3jqXHtzZdw3aJEg%40mail.gmail.com > > <https://groups.google.com/d/msgid/racket-users/CAFzLTskQ70okYZj247VA2rGNWyoW62wCyyu3jqXHtzZdw3aJEg%40mail.gmail.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. 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