mirror of https://github.com/sbt/sbt.git
108 lines
4.9 KiB
Scala
108 lines
4.9 KiB
Scala
/* sbt -- Simple Build Tool
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* Copyright 2011 Mark Harrah
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*/
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package sbt.complete
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import Parser._
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import java.io.File
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import java.net.URI
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import java.lang.Character.{getType, MATH_SYMBOL, OTHER_SYMBOL, DASH_PUNCTUATION, OTHER_PUNCTUATION, MODIFIER_SYMBOL, CURRENCY_SYMBOL}
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// Some predefined parsers
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trait Parsers
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{
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lazy val EOF = not(any)
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lazy val any: Parser[Char] = charClass(_ => true, "any character")
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lazy val DigitSet = Set("0","1","2","3","4","5","6","7","8","9")
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lazy val Digit = charClass(_.isDigit, "digit") examples DigitSet
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lazy val HexDigitSet = Set('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F')
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lazy val HexDigit = charClass(HexDigitSet, "hex") examples HexDigitSet.map(_.toString)
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lazy val Letter = charClass(_.isLetter, "letter")
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def IDStart = Letter
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lazy val IDChar = charClass(isIDChar, "ID character")
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lazy val ID = IDStart ~ IDChar.* map { case x ~ xs => (x +: xs).mkString }
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lazy val OpChar = charClass(isOpChar, "symbol")
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lazy val Op = OpChar.+.string
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lazy val OpOrID = ID | Op
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def opOrIDSpaced(s: String): Parser[Char] =
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if(DefaultParsers.matches(ID, s))
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OpChar | SpaceClass
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else if(DefaultParsers.matches(Op, s))
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IDChar | SpaceClass
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else
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any
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def isOpChar(c: Char) = !isDelimiter(c) && isOpType(getType(c))
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def isOpType(cat: Int) = cat match { case MATH_SYMBOL | OTHER_SYMBOL | DASH_PUNCTUATION | OTHER_PUNCTUATION | MODIFIER_SYMBOL | CURRENCY_SYMBOL => true; case _ => false }
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def isIDChar(c: Char) = c.isLetterOrDigit || c == '-' || c == '_'
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def isDelimiter(c: Char) = c match { case '`' | '\'' | '\"' | /*';' | */',' | '.' => true ; case _ => false }
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lazy val NotSpaceClass = charClass(!_.isWhitespace, "non-whitespace character")
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lazy val SpaceClass = charClass(_.isWhitespace, "whitespace character")
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lazy val NotSpace = NotSpaceClass.+.string
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lazy val OptNotSpace = NotSpaceClass.*.string
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lazy val Space = SpaceClass.+.examples(" ")
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lazy val OptSpace = SpaceClass.*.examples(" ")
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lazy val URIClass = URIChar.+.string !!! "Invalid URI"
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lazy val VerbatimDQuotes = "\"\"\""
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lazy val DQuoteChar = '\"'
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lazy val BackslashChar = '\\'
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lazy val DQuoteClass = charClass(_ == DQuoteChar, "double-quote character")
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lazy val NotDQuoteSpaceClass =
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charClass({ c: Char => (c != DQuoteChar) && !c.isWhitespace }, "non-double-quote-space character")
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lazy val NotDQuoteBackslashClass =
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charClass({ c: Char => (c != DQuoteChar) && (c != BackslashChar) }, "non-double-quote-backslash character")
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lazy val URIChar = charClass(alphanum) | chars("_-!.~'()*,;:$&+=?/[]@%#")
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def alphanum(c: Char) = ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9')
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// TODO: implement
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def fileParser(base: File): Parser[File] = token(mapOrFail(NotSpace)(s => new File(s.mkString)), "<file>")
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lazy val Port = token(IntBasic, "<port>")
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lazy val IntBasic = mapOrFail( '-'.? ~ Digit.+ )( Function.tupled(toInt) )
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lazy val NatBasic = mapOrFail( Digit.+ )( _.mkString.toInt )
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private[this] def toInt(neg: Option[Char], digits: Seq[Char]): Int =
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(neg.toSeq ++ digits).mkString.toInt
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lazy val Bool = ("true" ^^^ true) | ("false" ^^^ false)
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lazy val StringBasic = StringVerbatim | StringEscapable | NotQuoted
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lazy val StringVerbatim: Parser[String] = VerbatimDQuotes ~>
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any.+.string.filter(!_.contains(VerbatimDQuotes), _ => "Invalid verbatim string") <~
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VerbatimDQuotes
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lazy val StringEscapable: Parser[String] =
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(DQuoteChar ~> (NotDQuoteBackslashClass | EscapeSequence).+.string <~ DQuoteChar |
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(DQuoteChar ~ DQuoteChar) ^^^ "")
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lazy val EscapeSequence: Parser[Char] =
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BackslashChar ~> ('b' ^^^ '\b' | 't' ^^^ '\t' | 'n' ^^^ '\n' | 'f' ^^^ '\f' | 'r' ^^^ '\r' |
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'\"' ^^^ '\"' | '\'' ^^^ '\'' | '\\' ^^^ '\\' | UnicodeEscape)
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lazy val UnicodeEscape: Parser[Char] =
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("u" ~> repeat(HexDigit, 4, 4)) map { seq => Integer.parseInt(seq.mkString, 16).toChar }
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lazy val NotQuoted = (NotDQuoteSpaceClass ~ OptNotSpace) map { case (c, s) => c.toString + s }
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def repsep[T](rep: Parser[T], sep: Parser[_]): Parser[Seq[T]] =
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rep1sep(rep, sep) ?? Nil
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def rep1sep[T](rep: Parser[T], sep: Parser[_]): Parser[Seq[T]] =
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(rep ~ (sep ~> rep).*).map { case (x ~ xs) => x +: xs }
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def some[T](p: Parser[T]): Parser[Option[T]] = p map { v => Some(v) }
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def mapOrFail[S,T](p: Parser[S])(f: S => T): Parser[T] =
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p flatMap { s => try { success(f(s)) } catch { case e: Exception => failure(e.toString) } }
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def spaceDelimited(display: String): Parser[Seq[String]] = (token(Space) ~> token(StringBasic, display)).* <~ SpaceClass.*
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def flag[T](p: Parser[T]): Parser[Boolean] = (p ^^^ true) ?? false
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def trimmed(p: Parser[String]) = p map { _.trim }
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lazy val basicUri = mapOrFail(URIClass)( uri => new URI(uri))
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def Uri(ex: Set[URI]) = basicUri examples(ex.map(_.toString))
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}
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object Parsers extends Parsers
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object DefaultParsers extends Parsers with ParserMain
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{
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def matches(p: Parser[_], s: String): Boolean =
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apply(p)(s).resultEmpty.isValid
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def validID(s: String): Boolean = matches(ID, s)
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} |