TOML is kinda ugly compared to YAML.
I wrote a haiku some years back to demonstrate how broken the Ruby implementation was.
YAML:
takes a no for a 'no': no
spring,summer,fall,winter: 3,6,9,12
the game is: on
{"YAML"=>
{"takes a no for a 'no'"=>false,
"spring,summer,fall,winter"=>36912,
"the game is"=>true}}e.g.
>>> load(x, Map({"YAML": MapPattern(Str(), Str())}))
{'YAML': {'spring,summer,fall,winter': '3,6,9,12',
"takes a no for a 'no'": 'no',
'the game is': 'on'}}
>>> load(x, Map({"YAML": Map({"spring,summer,fall,winter": Str(), "takes a no for a 'no'": Bool(), "the game is": Bool()})}))
{'YAML': {'spring,summer,fall,winter': '3,6,9,12',
"takes a no for a 'no'": False,
'the game is': True}}