2.9 KiB
2.9 KiB
guile-toml
TOML for Guile; v1.0.0 compliant.
Installation
For now: add this folder to your GUILE_LOAD_PATH
.
Usage
When parsing and building TOML documents, guile-toml follows guile-json as close as possible. TOML types correspond to Guile types according to the following table:
TOML | Guile |
---|---|
string | string [0] |
key-value pair | alist |
array | vector |
integer/float | real |
true | #t |
false | #f |
datetime | SRFI-19 date [1] |
nan | +nan.0 |
±inf | ±inf.0 |
To start using guile-toml:
(use-modules (toml))
[0]: TOML's default behaviour for invalid UTF-8 is to fail, whereas Guile's default behavior is to replace invalid UTF-8 with the replacement character <20>. If you prefer TOML's behavior, use (set-port-conversion-strategy! (current-input-port) 'error)
.
[1]: TOML's time-local
is parsed same as a datetime-local
on the date of 1970-01-01
.
Reading TOML documents
(toml->scm str)
Reads a TOML document from the given string. Guile-toml's parsing is implemented with(ice-9 peg)
, which unfortunately does not support ports. See below for how to use this with a TOML file.
Building TOML documents
(scm->toml native #:optional port)
Creates a TOML document from the given native Guile value. The TOML document is written into the given port, or to the current output port if none is given.
Examples
- Basic
toml->scm
usage:
> (toml->scm "[a]\n b.c = \"hi world\"")
(("a" ("b" ("c" . "hi world"))))
- Read a TOML file and parse it (example from toml.io):
> (use-modules (toml) (ice-9 textual-ports))
> (toml->scm (call-with-input-file "example.toml" get-string-all))
(("servers"
("beta" ("role" . "backend") ("ip" . "10.0.0.2"))
("alpha"
("role" . "frontend")
("ip" . "10.0.0.1")))
("database"
("temp_targets" ("case" . 72.0) ("cpu" . 79.5))
("data" . #(#("delta" "phi") #(3.14)))
("ports" . #(8000 8001 8002))
("enabled" . #t))
("owner"
("dob"
.
#<date nanosecond: 0 second: 0 minute: 32 hour: 7 day: 27 month: 5 year: 1979 zone-offset: -28800>)
("name" . "Tom Preston-Werner"))
("title" . "TOML Example"))
example.toml
:
# This is a TOML document
title = "TOML Example"
[owner]
name = "Tom Preston-Werner"
dob = 1979-05-27T07:32:00-08:00
[database]
enabled = true
ports = [ 8000, 8001, 8002 ]
data = [ ["delta", "phi"], [3.14] ]
temp_targets = { cpu = 79.5, case = 72.0 }
[servers]
[servers.alpha]
ip = "10.0.0.1"
role = "frontend"
[servers.beta]
ip = "10.0.0.2"
role = "backend"