haldis/app/hlds/hlds.tatsu
2023-06-13 21:39:19 +02:00

89 lines
1.7 KiB
Text

# This is a Tatsu file.
# Syntax is explained at
# https://tatsu.readthedocs.io/en/stable/syntax.html
@@grammar :: Hlds
# Don't ignore any whitespace
@@whitespace :: //
@@eol_comments :: /[ \t]*#.*?$/
@@keyword :: single_choice multi_choice dish preset only requires except
start = [n] { @+:location } $ ;
location_header =
/={3,}/ n ~
id:identifier ':' s name:string
attributes:{ location_attribute }
[ n ]
/={3,}\n+/
;
location_attribute =
n '\t' key:identifier s value:string
;
location = >location_header items:{ block } ;
attributes =
name:/[^\n#]*?(?= +-- | | €| *\n| *#)/
[ s '--' ~ s description:/[^\n#]*?(?= | *\n| *#)/ ]
[ / +/ ~
[ {[ s ] ('{' tags+:identifier '}')} / +|$/ ]
[ price:price ]
]
;
block =
| dish_block
| choice_block
;
dish_block =
'dish' s ~
id:identifier ':' s >attributes
n
choices:{ indent_choice_block }
;
choice_entry = id:identifier ':' s >attributes ;
noindent_choice_entry = n '\t' >choice_entry ;
indent_choice_entry = n '\t\t' >choice_entry ;
# Toplevel choice definitions
choice_block =
id:identifier ':' s >attributes entries:{ noindent_choice_entry }
n
;
# Appears in a dish block. One of:
# 1) reference to toplevel choice definition
# 2) inline choice declaration (as opposed to globally declared and referenced)
indent_choice_block =
'\t' type:choice_type s
(
| kind:`declaration` id:identifier ':' ~ s >attributes entries:{ indent_choice_entry }
| kind:`reference` id:identifier [ s price:price ]
)
n
;
s = / +/ ;
n = '\n' {{'\t'} '\n'} ;
@name
identifier = /[a-z0-9_-]+/ ;
string = /[^\n#]+/ ;
choice_type = 'single_choice' | 'multi_choice' ;
int = /[0-9]+/ ;
currency = '€' ;
price = currency:currency s value_unit:int [ '.' value_cents:/[0-9]{,2}/ ] ;