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package scalaParser
package syntax
import acyclic.file
import org.parboiled2._
trait Identifiers { self: Parser with Basic =>
object Identifiers{
import Basic._
def Operator = rule{!Keywords ~ oneOrMore(OperatorChar)}
def VarId = VarId0(true)
def VarId0(dollar: Boolean) = rule { !Keywords ~ Lower ~ IdRest(dollar) }
def PlainId = rule { !Keywords ~ Upper ~ IdRest(true) | VarId | Operator }
def PlainIdNoDollar = rule { !Keywords ~ Upper ~ IdRest(false) | VarId0(false) | Operator }
def Id = rule { !Keywords ~ PlainId | ("`" ~ oneOrMore(noneOf("`")) ~ "`") }
def IdRest(dollar: Boolean) = {
if (!dollar) rule {
zeroOrMore(zeroOrMore("_") ~ oneOrMore(!anyOf("_$") ~ Letter | Digit)) ~
optional(oneOrMore("_") ~ zeroOrMore(OperatorChar))
} else rule{
zeroOrMore(zeroOrMore("_") ~ oneOrMore(!"_" ~ Letter | Digit)) ~
optional(oneOrMore("_") ~ zeroOrMore(OperatorChar))
}
}
def AlphabetKeywords = rule {
(
"abstract" | "case" | "catch" | "class" | "def" | "do" | "else" | "extends" | "false" | "finally" | "final" | "finally" | "forSome" | "for" | "if" |
"implicit" | "import" | "lazy" | "match" | "new" | "null" | "object" | "override" | "package" | "private" | "protected" | "return" |
"sealed" | "super" | "this" | "throw" | "trait" | "try" | "true" | "type" | "val" | "var" | "while" | "with" | "yield" | "_"
) ~ !Letter
}
def SymbolicKeywords = rule{
(
":" | ";" | "=>" | "=" | "<-" | "<:" | "<%" | ">:" | "#" | "@" | "\u21d2" | "\u2190"
) ~ !OperatorChar
}
def Keywords = rule {
AlphabetKeywords | SymbolicKeywords
}
}
}
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