lfedn is a parser for the edn specification, implemented using leex and yecc
and tested with eunit.
This is a low-level parser from edn to LFE data structures. You have to decide on how, specifically, to represent them, since each user may have a different need. There is no imposition here.
This project assumes you have rebar3 installed somwhere in your $PATH.
This project depends upon the follow, which are installed to the
_build/default/lib directory of this project when you run rebar3 compile.
- LFE (Lisp Flavored Erlang; needed only to compile)
{deps, [{lfe, {git, "[email protected]/rvirding/lfe.git", {tag, "0.10.1"}}}, - ltest (needed only to run the tests)
{ltest, {git, "[email protected]/lfex/ltest.git", {tag, "0.7.0"}}}]}.
Just add it to your rebar.config deps:
{deps,
[% ...
{lfedn,
{git, "[email protected]:quasiquoting/lfedn.git",
{tag, "1.2.0"}}}]}.$ rebar3 compile$ rebar3 eunit -v| edn | LFE |
|---|---|
| boolean | boolean |
| char | string |
| float | float |
| integer | integer |
| keyword¹ | atom |
| list | list |
| map | tagged list ⇒ `#(map [#(,key1 ,val1) ...]) |
nil (symbol) | nil (atom) |
| set² | tagged list ⇒ #(set [...]) |
| string | binary string (utf-8) |
| symbol | atom |
| tagged literal | tagged tuple ⇒ `#(tag ,symbol ,value) |
| vector | tagged list ⇒ #(vector [...]) |
¹: Although keyword ↦ atom, :nil ↦ #(keyword nil).
²: Uniqueness is not checked at parse time.
The to-lfe function transforms incoming data structures to be more
LFE-friendly, but the results can’t be converted back to string without
transforming again. The default mappings are:
| edn | LFE |
|---|---|
| boolean | boolean |
| char | string |
| float | float |
| integer | integer |
| keyword | atom |
| list | list |
| map | dict |
nil (symbol) | nil (atom) |
| set | set |
| string | binary string |
| symbol | atom |
| tagged literal | call registered handler for tag or fail if not found |
| vector | list |
| Mariano Guerra (@marianoguerra) | erldn (Erlang) |
| Eric Bailey (@yurrriq) | lfedn (LFE) |
The MIT License (MIT)
Copyright (c) 2013 Mariano Guerra
Copyright (c) 2015 Eric Bailey
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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copies of the Software, and to permit persons to whom the Software is
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The above copyright notice and this permission notice shall be included in
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