kaappi-yaml — YAML Parser

thottam install kaappi-yaml

Pure Scheme — no dependencies.

Quick start

(import (kaappi yaml))

(define config (yaml-read-string "
server:
  host: localhost
  port: 8080
routes:
  - /
  - /api
"))

(yaml-ref* config "server" "port")   ;=> 8080
(yaml-ref config "routes")           ;=> ("/" "/api")

API

(yaml-read [port])             ; parse from port
(yaml-read-string str)         ; parse from string
(yaml-write value [port])      ; serialize to port
(yaml-write-string value)      ; serialize to string
(yaml-ref table key)           ; lookup key
(yaml-ref* table key ...)      ; nested lookup
(yaml-null? value)             ; check for null

Type mapping

YAML	Scheme
Mapping	alist
Sequence	list
String	string
Integer	exact integer
Float	inexact number
Boolean	#t / #f
Null	'null

Supported features

Block and flow styles, nested structures, quoted strings (double/single), comments, scalar type detection, special values (.inf, .nan, ~, null).