{
  "name": "Augmented Backus-Naur Form",
  "scopeName": "source.abnf",
  "patterns": [
    {
      "include": "#main"
    }
  ],
  "repository": {
    "assignment": {
      "patterns": [
        {
          "name": "keyword.operator.assignment.increment.abnf",
          "match": "=/"
        },
        {
          "name": "keyword.operator.assignment.abnf",
          "match": "="
        }
      ]
    },
    "comment": {
      "name": "comment.line.semicolon.abnf",
      "begin": ";",
      "end": "$",
      "beginCaptures": {
        "0": {
          "name": "punctuation.definition.comment.abnf"
        }
      }
    },
    "core-rules": {
      "name": "support.constant.reference.core-rule.abnf",
      "match": "(?x)\n\\b\n(ALPHA|BIT|CHAR|CRLF|CR|CTL|DIGIT|DQUOTE\n|HEXDIG|HTAB|LF|LWSP|OCTET|SP|VCHAR|WSP)\n\\b"
    },
    "group": {
      "name": "meta.group.abnf",
      "begin": "\\(",
      "end": "\\)",
      "patterns": [
        {
          "include": "#rhs"
        }
      ],
      "beginCaptures": {
        "0": {
          "name": "punctuation.definition.round.bracket.begin.abnf"
        }
      },
      "endCaptures": {
        "0": {
          "name": "punctuation.definition.round.bracket.end.abnf"
        }
      }
    },
    "main": {
      "patterns": [
        {
          "include": "#comment"
        },
        {
          "include": "#rule"
        }
      ]
    },
    "optional": {
      "name": "meta.optional.abnf",
      "begin": "\\[",
      "end": "\\]",
      "patterns": [
        {
          "include": "#rhs"
        }
      ],
      "beginCaptures": {
        "0": {
          "name": "punctuation.definition.square.bracket.begin.abnf"
        }
      },
      "endCaptures": {
        "0": {
          "name": "punctuation.definition.square.bracket.end.abnf"
        }
      }
    },
    "quantifier": {
      "name": "meta.quantifier.abnf",
      "match": "([0-9]*)(\\*)",
      "captures": {
        "1": {
          "name": "constant.numeric.decimal.integer.int.abnf"
        },
        "2": {
          "name": "keyword.operator.logical.repetition.asterisk.star.abnf"
        }
      }
    },
    "reference": {
      "name": "variable.parameter.argument.identifier.reference.abnf",
      "match": "[A-Za-z][-A-Za-z0-9]*"
    },
    "rhs": {
      "patterns": [
        {
          "include": "#assignment"
        },
        {
          "include": "#string"
        },
        {
          "include": "#terminal"
        },
        {
          "include": "#comment"
        },
        {
          "include": "#quantifier"
        },
        {
          "include": "#group"
        },
        {
          "include": "#optional"
        },
        {
          "include": "#core-rules"
        },
        {
          "include": "#reference"
        },
        {
          "name": "keyword.operator.logical.or.alternation.pipe.abnf",
          "match": "/"
        }
      ]
    },
    "rule": {
      "name": "meta.ruleset.$2.abnf",
      "contentName": "meta.rhs.abnf",
      "begin": "(?:^|\\G)(\\s*)([A-Za-z][-A-Za-z0-9]*)",
      "end": "^(?!\\1\\s+\\S)|^(?=\\S)",
      "patterns": [
        {
          "include": "#rhs"
        }
      ],
      "beginCaptures": {
        "0": {
          "name": "meta.lhs.abnf"
        },
        "1": {
          "name": "punctuation.whitespace.leading.abnf"
        },
        "2": {
          "name": "entity.name.rule.identifier.abnf"
        }
      }
    },
    "string": {
      "name": "string.quoted.double.abnf",
      "begin": "\"",
      "end": "\"",
      "beginCaptures": {
        "0": {
          "name": "punctuation.definition.string.begin.abnf"
        }
      },
      "endCaptures": {
        "0": {
          "name": "punctuation.definition.string.end.abnf"
        }
      }
    },
    "terminal": {
      "patterns": [
        {
          "name": "meta.terminal.numeric.decimal.abnf",
          "begin": "(%)(d|D)",
          "end": "(?=$|[;()\\[\\]{}\\s])",
          "patterns": [
            {
              "name": "invalid.illegal.syntax.abnf",
              "match": "[0-9A-Fa-f]*[^-\\s0-9.;()\\[\\]{}][^-.;()\\[\\]{}]*"
            },
            {
              "name": "constant.numeric.integer.int.decimal.abnf",
              "match": "[0-9]+"
            },
            {
              "name": "punctuation.separator.range.dash.hyphen.abnf",
              "match": "-"
            },
            {
              "name": "keyword.operator.concatenation.abnf",
              "match": "\\."
            }
          ],
          "beginCaptures": {
            "1": {
              "name": "punctuation.definition.terminal.percentage-sign.abnf"
            },
            "2": {
              "name": "storage.type.modifier.radix.abnf"
            }
          }
        },
        {
          "name": "meta.terminal.numeric.hexadecimal.hex.abnf",
          "begin": "(%)(x|X)",
          "end": "(?=$|[;()\\[\\]{}\\s])",
          "patterns": [
            {
              "name": "invalid.illegal.syntax.abnf",
              "match": "[0-9A-Fa-f]*[^-\\s0-9A-Fa-f.;()\\[\\]{}][^-.;()\\[\\]{}]*"
            },
            {
              "name": "constant.numeric.integer.int.hexadecimal.hex.abnf",
              "match": "[0-9A-Fa-f]+"
            },
            {
              "name": "punctuation.separator.range.dash.hyphen.abnf",
              "match": "-"
            },
            {
              "name": "keyword.operator.concatenation.abnf",
              "match": "\\."
            }
          ],
          "beginCaptures": {
            "1": {
              "name": "punctuation.definition.terminal.percentage-sign.abnf"
            },
            "2": {
              "name": "storage.type.modifier.radix.abnf"
            }
          }
        },
        {
          "name": "meta.terminal.numeric.binary.bin.abnf",
          "begin": "(%)(b|B)",
          "end": "(?=$|[;()\\[\\]{}\\s])",
          "patterns": [
            {
              "name": "invalid.illegal.syntax.abnf",
              "match": "[0-1]*[^-\\s0-1.;()\\[\\]{}][^-.;()\\[\\]{}]*"
            },
            {
              "name": "constant.numeric.integer.int.binary.bin.abnf",
              "match": "[0-1]+"
            },
            {
              "name": "punctuation.separator.range.dash.hyphen.abnf",
              "match": "-"
            },
            {
              "name": "keyword.operator.concatenation.abnf",
              "match": "\\."
            }
          ],
          "beginCaptures": {
            "1": {
              "name": "punctuation.definition.terminal.percentage-sign.abnf"
            },
            "2": {
              "name": "storage.type.modifier.radix.abnf"
            }
          }
        }
      ]
    }
  }
}