llama.cpp/grammars/json_arr.gbnf

# This is the same as json.gbnf but we restrict whitespaces at the end of the root array
# Useful for generating JSON arrays

root   ::= arr
value  ::= object | array | string | number | ("true" | "false" | "null") ws

arr  ::=
  "[\n" ws (
            value
    (",\n" ws value)*
  )? "]"

object ::=
  "{" ws (
            string ":" ws value
    ("," ws string ":" ws value)*
  )? "}" ws

array  ::=
  "[" ws (
            value
    ("," ws value)*
  )? "]" ws

string ::=
  "\"" (
    [^"\\] |
    "\\" (["\\/bfnrt] | "u" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F]) # escapes
  )* "\"" ws

number ::= ("-"? ([0-9] | [1-9] [0-9]*)) ("." [0-9]+)? ([eE] [-+]? [0-9]+)? ws

# Optional space: by convention, applied in this grammar after literal chars when allowed
ws ::= ([ \t\n] ws)?