scopeName: source.reid
patterns:
  - include: "#import"
  - include: "#extern"
  - include: "#expression"
repository:
  # function-definition:
  #   begin: "(fn)\\s*(\\w+)\\(((\\w+)\\s*\\:\\s*(\\w+),?)*\\)\\s*->\\s*(\\w+)\\s*\\{"
  #   end: "\\}"
  #   beginCaptures:
  #     1:
  #       name: "keyword.other"
  #     2:
  #       name: "entity.name.function"
  #     4:
  #       name: "entity.name.parameter"
  #     5:
  #       name: "entity.name.type"
  #     6:
  #       name: "entity.name.type"
  #   patterns:
  #     - include: "#type"
  #     - include: "#expression"
  import:
    begin: "(import)\\s*"
    end: ";"
    beginCaptures:
      1:
        name: keyword
    endCaptures:
      0:
        name: punctuation.semi.reid
    patterns:
      - include: "#identifier"
      - include: "#punctiation"
  punctuation:
    patterns:
      - match: "::"
        name: keyword.operator.namespace.reid
      - match: ";"
        name: punctuation.semi.reid
      - match: "."
        name: punctuation.dot.reid
      - match: ","
        name: punctuation.comma.reid
  expression:
    patterns:
      - include: "#comment"
      - include: "#fn-signature"
      - include: "#binop-impl"
      - include: "#type-impl"
      - include: "#struct-definition"
      - include: "#block"
      - include: "#binop"
      - include: "#namespace"
      - include: "#cast"
      - include: "#function-call"
      - include: "#parenthesis"
      - include: "#number-literal"
      - include: "#string-literal"
      - include: "#common-type"
      - include: "#array"
      - include: "#keywords"
      - include: "#struct-expression"
      - include: "#identifier"
      - include: "#punctuation"
  comment:
    match: "\\/\\/(.|\\/)*"
    name: comment.line.double-slash.reid
  extern:
    begin: "extern"
    end: "\\;"
    beginCaptures:
      0:
        name: keyword.fn.reid
    patterns:
      - include: "#expression"
  fn-signature:
    begin: "(fn)\\s*(\\w+)\\("
    beginCaptures:
      1:
        name: keyword.fn.reid
      2:
        name: entity.name.function.reid
    end: "\\)"
    patterns:
      - include: "#annotated-identifier"
      - include: "#keywords"
      - include: "#binop"
    endCaptures:
      2:
        name: entity.name.type.reid
  type-impl:
    begin: >
      (impl)\s*
      (\w+)\s*
      \{
    end: "\\}"
    captures:
      1:
        name: keyword.impl.reid
      2:
        name: entity.name.type
    patterns:
      - include: "#expression"
  binop-impl:
    begin: "(impl)\\s+(binop)\\s+\\(((.*)\\s*:\\s*(.*))\\)(.*)\\(((.*)\\s*:\\s*(.*))\\)\\s*->\\s*(\\w+)\\s*\\{"
    end: "\\}"
    beginCaptures:
      1:
        name: keyword.impl.reid
      2:
        name: keyword.impl.reid
      4:
        name: variable.parameter.binop.reid
      5:
        name: entity.name.type.parameter.binop.reid
      6:
        name: keyword.operator.math.reid
      8:
        name: variable.parameter.binop.reid
      9:
        name: entity.name.type.parameter.binop.reid
      10:
        name: entity.name.type.return.binop.reid
    patterns:
      - include: "#expression"
  struct-definition:
    begin: "(struct)\\s*(\\w+)\\s*\\{"
    end: "\\}"
    captures:
      1:
        name: keyword.struct.reid
      2:
        name: entity.name.type
    patterns:
      - include: "#annotated-identifier"
  struct-expression:
    begin: "([A-Z]\\w*)\\s*\\{"
    end: "\\}"
    captures:
      1:
        name: entity.name.type.struct.reid
    patterns:
      - include: "#expression"
  number-literal:
    match: "[0-9]+(\\.[0-9]+)?"
    name: "constant.numeric"
  string-literal:
    begin: '"'
    end: '"'
    name: string.quoted.double
    patterns:
      - match: "\\."
        name: constant.character.escape
  block:
    begin: "\\{"
    end: "\\}"
    patterns:
      - include: "#expression"
  namespace:
    match: "(\\w+)(\\:\\:)"
    captures:
      1:
        name: entity.name.function.reid
      2:
        name: keyword.operator.namespace.reid
  cast:
    match: "(as)\\s+(\\w+)"
    captures:
      1:
        name: keyword.cast.reid
      2:
        name: entity.name.type.reid
  function-call:
    begin: "(\\w+)?\\("
    end: "\\)"
    beginCaptures:
      1:
        name: entity.name.function.reid
    patterns:
      - include: "#expression"
  parenthesis:
    begin: "\\("
    end: "\\)"
    beginCaptures:
      0:
        name: keyword.operator.parenthesis.reid
    endCaptures:
      0:
        name: keyword.operator.parenthesis.reid
    patterns:
      - include: "#expression"
  annotated-identifier:
    begin: "(\\w+)\\:"
    end: ","
    beginCaptures:
      1:
        name: variable.language.reid
    patterns:
      - include: "#expression"
  identifier:
    match: "\\w+"
    name: variable.language.reid
  keywords:
    patterns: 
      - match: "let|mut|pub"
        name: "storage.type.reid"
      - match: "if|return"
        name: "keyword.control"
      - match: "self"
        name: "variable.language.self.reid"
  binop:
    match: "\\<\\=|\\>\\=|\\=\\=|\\<|\\>|\\*|\\+|\\-|\\^|\\&\\&|\\&"
    name: keyword.operator.math.reid
  array:
    begin: "\\["
    end: "\\]"
    beginCaptures:
      0:
        name: entity.name.type.array.reid
    endCaptures:
      0:
        name: entity.name.type.array.reid
    patterns:
      - include: "#expression"
  common-type:
    match: "u8|u16|u32|u64|u128|i8|i16|i32|i64|i128|bool"
    name: entity.name.type.common.reid