HOCON.YAML-tmLanguage

# [PackageDev] target_format: plist, ext: tmLanguage
---
name: HOCON
scopeName: source.hocon
fileTypes: [conf]
uuid: 15e12a0a-a88e-47bd-a967-a8393605cd60

patterns:
- include: '#value'

repository:
  number:
    name: constant.numeric.hocon
    match: (-?(?:0|[1-9]\d*)(?:(?:\.\d+)?(?:[eE][+-]?\d+)?)?)

  time-unit:
    match: (\d+)\s*(nanoseconds?|microseconds?|milliseconds?|seconds?|minutes?|hours?|days?|ns|us|ms|s|m|h|d)
    captures:
      '1': {name: constant.numeric.time.hocon}
      '2': {name: keyword.other.time.unit.hocon}

  keyword:
    patterns:
    - match: '\+='
      name: keyword.operator.hocon

    - match: (?:^|\s)(true|false|yes|no|on|off|null)(?=$|\s)
      captures:
        '1': {name: keyword.other.boolean.hocon}

    - begin: (?:^|\s)(include (?:url|file|classpath))\s*\(
      end: '\)'
      beginCaptures:
        '1': {name: keyword.other.include.hocon}
      patterns:
      - include: '#string'

    - match: (?:^|\s)(include)\s
      captures:
        '1': {name: keyword.other.include.hocon}
      patterns:
      - include: '#string'

  hash-comment:
    match: (#.*$\n?)
    captures:
      '0': {name: comment.line.number-sign.hocon}

  slashes-comment:
    match: (//.*$\n?)
    captures:
      '0': {name: punctuation.definition.comment.hocon}

  multiline-string:
    name: string.quoted.triple.hocon
    begin: '"""'
    end: '"""'
    captures:
      '0': {name: punctuation.definition.string.hocon}
    patterns:
    - name: constant.character.escape.hocon
      match: (\\(?:["\\/bfnrt]|u[0-9a-fA-F]{4}))
    
    - name: invalid.illegal.unrecognized-string-escape.hocon
      match: \\.

  string:
    name: string.quoted.double.hocon
    begin: '"'
    end: '"'
    captures:
      '0': {name: punctuation.definition.string.hocon}
    patterns:
    - name: constant.character.escape.hocon
      match: (\\(?:["\\/bfnrt]|u[0-9a-fA-F]{4}))

    - name: invalid.illegal.unrecognized-string-escape.hocon
      match: \\.

  name:
    name: entity.name.function.hocon
    match: ([a-zA-Z_][a-zA-Z0-9_$\.-]*)

  substitution:
    name: variable.parameter.substitution.hocon
    begin: (\$\{\??)
    end: (\})
    captures:
      '0': {name: variable.parameter.substitution.hocon}
    patterns:
    - name: variable.parameter.substitution.hocon
      match: ([a-zA-Z_][a-zA-Z0-9_$\.-]*)

  list:
    name: meta.structure.array.hocon
    begin: '\['
    end: '\]'
    captures:
      '0': {name: punctuation.definition.list.hocon}
    patterns:
    - include: '#value'

    - name: punctuation.separator.array.hocon
      match: ','

    - name: invalid.illegal.expected-list-separator.hocon
      match: ([^\s\]])

  object:
    begin: '\{'
    end: '\}'
    captures:
      '0': {name: punctuation.definition.section.hocon}
    patterns:
    - include: '#name'
      name: entity.name.function.hocon

    - name: punctuation.separator.key-value.hocon
      match: ((?:=|:)|\s*(?=\{))

    - include: '#value'

  value:
    patterns:
    - include: '#hash-comment'
    - include: '#slashes-comment'
    - include: '#time-unit'
    - include: '#number'
    - include: '#keyword'
    - include: '#substitution'
    - include: '#string'
    - include: '#multiline-string'
    - include: '#list'
    - include: '#object'

...