Help with parser

[rndev-io]

Hi, cool and useful library, thanks!

I need help to write parser for next grammar (it's some subset of CMake grammar)

FIRST(abc efg)

S_E_C_O_N_D()

third(
    abc
    efg
)

FOURTH(
    abc.efg
)

Where FIRST, S_E_C_O_N_D, third, FOURTH some macros, and abc, efg, abc.efg macros arguments (zero or more). I write parser, but I don't understand how to separate macros and arguments tokenization.

class CMake : Grammar<Any?>() {
    val LINE_COMMENT by token("#.*", ignore = true)
    val NL by token("[\r\n]+", ignore = true)
    val WS by token("\\s+", ignore = true)
    val O_PAREN by token("\\(")
    val C_PAREN by token("\\)")
    val IDENT by token("[A-Za-z_][A-Za-z0-9_]*")
    val ARG by token("[^\\s()#]+")
    val macros by IDENT * -O_PAREN * optional(parser(this::arguments)) * -C_PAREN
    val arguments by separated(parser(this::ARG), WS, true)
    override val rootParser by oneOrMore(macros)
}

This parser throw exception Could not parse input: MismatchedToken(expected=C_PAREN (\)), found=IDENT for "abc" at 6 (1:7)), but abc is ARG, not IDENT.

Thanks for help!