@top Program { expression* }

@skip {} {
  BlockComment { "/*" (blockCommentContent | blockCommentNewline)* blockCommentEnd }
}

@skip { space | LineComment | BlockComment }

@local tokens {
  blockCommentEnd { "*/" }
  blockCommentNewline { "\n" }
  @else blockCommentContent
}

expression {
  Identifier |
  String |
  Boolean |
  Application { "(" expression* ")" }
}

@tokens {
  Identifier { $[a-zA-Z_\-0-9]+ }

  String { '"' (!["\\] | "\\" _)* '"' }

  Boolean { "#t" | "#f" }

  LineComment { "//" ![\n]* }

  space { $[ \t\n\r]+ }

  "(" ")"
}

@detectDelim