{
  "name": "proto",
  "scopeName": "source.proto",
  "fileTypes": ["proto"],
  "patterns": [
    {
      "include": "#comments"
    },
    {
      "include": "#syntax"
    },
    {
      "include": "#package"
    },
    {
      "include": "#import"
    },
    {
      "include": "#optionStmt"
    },
    {
      "include": "#message"
    },
    {
      "include": "#enum"
    },
    {
      "include": "#service"
    }
  ],
  "repository": {
    "comments": {
      "patterns": [
        {
          "name": "comment.block.proto",
          "begin": "/\\*",
          "end": "\\*/"
        },
        {
          "name": "comment.line.double-slash.proto",
          "begin": "//",
          "end": "$\\n?"
        }
      ]
    },
    "syntax": {
      "match": "\\s*(syntax)\\s*(=)\\s*(\"proto[23]\")\\s*(;)",
      "captures": {
        "1": {
          "name": "keyword.other.proto"
        },
        "2": {
          "name": "keyword.operator.assignment.proto"
        },
        "3": {
          "name": "string.quoted.double.proto.syntax"
        },
        "4": {
          "name": "punctuation.terminator.proto"
        }
      }
    },
    "package": {
      "match": "\\s*(package)\\s+([\\w.]+)\\s*(;)",
      "captures": {
        "1": {
          "name": "keyword.other.proto"
        },
        "2": {
          "name": "string.unquoted.proto.package"
        },
        "3": {
          "name": "punctuation.terminator.proto"
        }
      }
    },
    "import": {
      "match": "\\s*(import)\\s+(weak|public)?\\s*(\"[^\"]+\")\\s*(;)",
      "captures": {
        "1": {
          "name": "keyword.other.proto"
        },
        "2": {
          "name": "keyword.other.proto"
        },
        "3": {
          "name": "string.quoted.double.proto.import"
        },
        "4": {
          "name": "punctuation.terminator.proto"
        }
      }
    },
    "optionStmt": {
      "begin": "(option)\\s+(\\w+|\\(\\w+(\\.\\w+)*\\))(\\.\\w+)*\\s*(=)",
      "beginCaptures": {
        "1": {
          "name": "keyword.other.proto"
        },
        "2": {
          "name": "support.other.proto"
        },
        "3": {
          "name": "support.other.proto"
        },
        "4": {
          "name": "support.other.proto"
        },
        "5": {
          "name": "keyword.operator.assignment.proto"
        }
      },
      "end": "(;)",
      "endCaptures": {
        "1": {
          "name": "punctuation.terminator.proto"
        }
      },
      "patterns": [
        {
          "include": "#constants"
        },
        {
          "include": "#number"
        },
        {
          "include": "#string"
        },
        {
          "include": "#subMsgOption"
        }
      ]
    },
    "subMsgOption": {
      "begin": "\\{",
      "end": "\\}",
      "patterns": [
        {
          "include": "#kv"
        },
        {
          "include": "#comments"
        }
      ]
    },
    "kv": {
      "begin": "(\\w+)\\s*(:)",
      "beginCaptures": {
        "1": {
          "name": "keyword.other.proto"
        },
        "2": {
          "name": "punctuation.separator.key-value.proto"
        }
      },
      "end": "(;)|,|(?=[}/_a-zA-Z])",
      "endCaptures": {
        "1": {
          "name": "punctuation.terminator.proto"
        }
      },
      "patterns": [
        {
          "include": "#constants"
        },
        {
          "include": "#number"
        },
        {
          "include": "#string"
        },
        {
          "include": "#subMsgOption"
        }
      ]
    },
    "fieldOptions": {
      "begin": "\\[",
      "end": "\\]",
      "patterns": [
        {
          "include": "#constants"
        },
        {
          "include": "#number"
        },
        {
          "include": "#string"
        },
        {
          "include": "#subMsgOption"
        },
        {
          "include": "#optionName"
        }
      ]
    },
    "optionName": {
      "match": "(\\w+|\\(\\w+(\\.\\w+)*\\))(\\.\\w+)*",
      "captures": {
        "1": {
          "name": "support.other.proto"
        },
        "2": {
          "name": "support.other.proto"
        },
        "3": {
          "name": "support.other.proto"
        }
      }
    },
    "message": {
      "begin": "(message|extend)(\\s+)([A-Za-z_][A-Za-z0-9_.]*)(\\s*)(\\{)?",
      "beginCaptures": {
        "1": {
          "name": "keyword.other.proto"
        },
        "3": {
          "name": "entity.name.class.message.proto"
        }
      },
      "end": "\\}",
      "patterns": [
        {
          "include": "#reserved"
        },
        {
          "include": "$self"
        },
        {
          "include": "#enum"
        },
        {
          "include": "#optionStmt"
        },
        {
          "include": "#comments"
        },
        {
          "include": "#oneof"
        },
        {
          "include": "#field"
        },
        {
          "include": "#mapfield"
        }
      ]
    },
    "reserved": {
      "begin": "(reserved)\\s+",
      "beginCaptures": {
        "1": {
          "name": "keyword.other.proto"
        }
      },
      "end": "(;)",
      "endCaptures": {
        "1": {
          "name": "punctuation.terminator.proto"
        }
      },
      "patterns": [
        {
          "match": "(\\d+)(\\s+(to)\\s+(\\d+))?",
          "captures": {
            "1": {
              "name": "constant.numeric.proto"
            },
            "3": {
              "name": "keyword.other.proto"
            },
            "4": {
              "name": "constant.numeric.proto"
            }
          }
        },
        {
          "include": "#string"
        }
      ]
    },
    "field": {
      "begin": "\\s*(optional|repeated|required)?\\s*\\b([\\w.]+)\\s+(\\w+)\\s*(=)\\s*(0[xX][0-9a-fA-F]+|[0-9]+)",
      "beginCaptures": {
        "1": {
          "name": "storage.modifier.proto"
        },
        "2": {
          "name": "storage.type.proto"
        },
        "3": {
          "name": "variable.other.proto"
        },
        "4": {
          "name": "keyword.operator.assignment.proto"
        },
        "5": {
          "name": "constant.numeric.proto"
        }
      },
      "end": "(;)",
      "endCaptures": {
        "1": {
          "name": "punctuation.terminator.proto"
        }
      },
      "patterns": [
        {
          "include": "#fieldOptions"
        }
      ]
    },
    "mapfield": {
      "begin": "\\s*(map)\\s*(<)\\s*([\\w.]+)\\s*,\\s*([\\w.]+)\\s*(>)\\s+(\\w+)\\s*(=)\\s*(\\d+)",
      "beginCaptures": {
        "1": {
          "name": "storage.type.proto"
        },
        "2": {
          "name": "punctuation.definition.typeparameters.begin.proto"
        },
        "3": {
          "name": "storage.type.proto"
        },
        "4": {
          "name": "storage.type.proto"
        },
        "5": {
          "name": "punctuation.definition.typeparameters.end.proto"
        },
        "6": {
          "name": "variable.other.proto"
        },
        "7": {
          "name": "keyword.operator.assignment.proto"
        },
        "8": {
          "name": "constant.numeric.proto"
        }
      },
      "end": "(;)",
      "endCaptures": {
        "1": {
          "name": "punctuation.terminator.proto"
        }
      },
      "patterns": [
        {
          "include": "#fieldOptions"
        }
      ]
    },
    "oneof": {
      "begin": "(oneof)\\s+([A-Za-z][A-Za-z0-9_]*)\\s*\\{?",
      "beginCaptures": {
        "1": {
          "name": "keyword.other.proto"
        },
        "2": {
          "name": "variable.other.proto"
        }
      },
      "end": "\\}",
      "patterns": [
        {
          "include": "#optionStmt"
        },
        {
          "include": "#comments"
        },
        {
          "include": "#field"
        }
      ]
    },
    "enum": {
      "begin": "(enum)(\\s+)([A-Za-z][A-Za-z0-9_]*)(\\s*)(\\{)?",
      "beginCaptures": {
        "1": {
          "name": "keyword.other.proto"
        },
        "3": {
          "name": "entity.name.class.proto"
        }
      },
      "end": "\\}",
      "patterns": [
        {
          "include": "#reserved"
        },
        {
          "include": "#optionStmt"
        },
        {
          "include": "#comments"
        },
        {
          "begin": "([A-Za-z][A-Za-z0-9_]*)\\s*(=)\\s*(0[xX][0-9a-fA-F]+|[0-9]+)",
          "beginCaptures": {
            "1": {
              "name": "variable.other.proto"
            },
            "2": {
              "name": "keyword.operator.assignment.proto"
            },
            "3": {
              "name": "constant.numeric.proto"
            }
          },
          "end": "(;)",
          "endCaptures": {
            "1": {
              "name": "punctuation.terminator.proto"
            }
          },
          "patterns": [
            {
              "include": "#fieldOptions"
            }
          ]
        }
      ]
    },
    "service": {
      "begin": "(service)\\s+([A-Za-z][A-Za-z0-9_.]*)\\s*\\{?",
      "beginCaptures": {
        "1": {
          "name": "keyword.other.proto"
        },
        "2": {
          "name": "entity.name.class.message.proto"
        }
      },
      "end": "\\}",
      "patterns": [
        {
          "include": "#comments"
        },
        {
          "include": "#optionStmt"
        },
        {
          "include": "#method"
        }
      ]
    },
    "method": {
      "begin": "(rpc)\\s+([A-Za-z][A-Za-z0-9_]*)",
      "beginCaptures": {
        "1": {
          "name": "keyword.other.proto"
        },
        "2": {
          "name": "entity.name.function"
        }
      },
      "end": "\\}|(;)",
      "endCaptures": {
        "1": {
          "name": "punctuation.terminator.proto"
        }
      },
      "patterns": [
        {
          "include": "#comments"
        },
        {
          "include": "#optionStmt"
        },
        {
          "include": "#rpcKeywords"
        },
        {
          "include": "#ident"
        }
      ]
    },
    "rpcKeywords": {
      "match": "\\b(stream|returns)\\b",
      "name": "keyword.other.proto"
    },
    "ident": {
      "match": "[A-Za-z][A-Za-z0-9_]*",
      "name": "entity.name.class.proto"
    },
    "constants": {
      "match": "\\b(true|false|max|[A-Z_]+)\\b",
      "name": "constant.language.proto"
    },
    "storagetypes": {
      "match": "\\b(double|float|int32|int64|uint32|uint64|sint32|sint64|fixed32|fixed64|sfixed32|sfixed64|bool|string|bytes)\\b",
      "name": "storage.type.proto"
    },
    "string": {
      "match": "('([^']|\\')*')|(\"([^\"]|\\\")*\")",
      "name": "string.quoted.double.proto"
    },
    "number": {
      "name": "constant.numeric.proto",
      "match": "\\b((0(x|X)[0-9a-fA-F]*)|(([0-9]+\\.?[0-9]*)|(\\.[0-9]+))((e|E)(\\+|-)?[0-9]+)?)\\b"
    }
  }
}