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# A simple grammar for the simple JSON data language.
# For parser implementations that use this grammar, see:
# * https://github.com/ingydotnet/pegex-json-pm
%grammar json
%version 0.0.1
%include pegex-atoms
json: - value -
object:
/- '{' -/
pair* % /- ',' -/
/- '}' -/
pair: string /- ':' -/ value
array:
/- '[' -/
value* % /- ',' -/
/- ']' -/
value:
| string
| number
| object
| array
| true
| false
| null
# string and number are interpretations of http://www.json.org/
string: /
DOUBLE
(
(:
BACK (: # Backslash escapes
[
DOUBLE # Double Quote
BACK # Back Slash
SLASH # Foreward Slash
'b' # Back Space
'f' # Form Feed
'n' # New Line
'r' # Carriage Return
't' # Horizontal Tab
]
|
'u' HEX{4} # Unicode octet pair
)
|
[^ DOUBLE CONTROLS ] # Anything else
)*
)
DOUBLE
/
number: /(
DASH?
(: '0' | [1-9] DIGIT* )
(: DOT DIGIT* )?
(: [eE] [ DASH PLUS ]? DIGIT+ )?
)/
true: 'true'
false: 'false'
null: 'null'