Created proper 'docs' folder for new layout.

1 files changed, 0 insertions, 118 deletions

diff --git a/sources/examples/parsers1.scala b/sources/examples/parsers1.scala
deleted file mode 100644
index 143f354049..0000000000
--- a/sources/examples/parsers1.scala
+++ /dev/null
@@ -1,118 +0,0 @@
-package examples;
-
-object parsers1 {
-
-  abstract class Parsers {
-
-    type inputType;
-
-    abstract class Parser {
-
-      type Result = Option[inputType];
-
-      def apply(in: inputType): Result;
-
-      /*** p &&& q applies first p, and if that succeeds, then q
-       */
-      def &&& (q: => Parser) = new Parser {
-        def apply(in: inputType): Result = Parser.this.apply(in) match {
-          case None => None
-          case Some(in1)  => q(in1)
-        }
-      }
-
-      /*** p ||| q applies first p, and, if that fails, then q.
-       */
-      def ||| (q: => Parser) = new Parser {
-        def apply(in: inputType): Result = Parser.this.apply(in) match {
-          case None => q(in)
-          case s => s
-        }
-      }
-    }
-
-    val empty = new Parser {
-      def apply(in: inputType): Result = Some(in)
-    }
-
-    val fail = new Parser {
-      def apply(in: inputType): Result = None
-    }
-
-    def opt(p: Parser): Parser = p ||| empty;    // p? = (p | <empty>)
-    def rep(p: Parser): Parser = opt(rep1(p));   // p* = [p+]
-    def rep1(p: Parser): Parser = p &&& rep(p);  // p+ = p p*
-  }
-
-  abstract class ListParsers extends Parsers {
-    def chr(p: char => boolean): Parser;
-    def chr(c: char): Parser = chr(d: char => d == c);
-
-    def letter    : Parser = chr(Character.isLetter);
-    def digit     : Parser = chr(Character.isDigit);
-
-    def ident     : Parser = letter &&& rep(letter ||| digit);
-    def number    : Parser = digit &&& rep(digit);
-    def list      : Parser = chr('(') &&& listElems &&& chr(')');
-    def listElems : Parser = expr &&& (chr(',') &&& listElems ||| empty);
-    def expr      : Parser = ident ||| number ||| list;
-  }
-
-  abstract class ExprParsers extends Parsers {
-    def chr(p: char => boolean): Parser;
-    def chr(c: char): Parser = chr(d: char => d == c);
-
-    def digit     : Parser = chr(Character.isDigit);
-    def number    : Parser = digit &&& rep(digit);
-    def summand   : Parser = number ||| chr('(') &&& expr &&& chr(')');
-    def expr      : Parser = summand &&& rep(chr('+') &&& summand)
-  }
-
-  class ParseString(s: String) extends Parsers {
-    type inputType = int;
-    val input = 0;
-    def chr(p: char => boolean) = new Parser {
-      def apply(in: int): Parser#Result =
-        if (in < s.length() && p(s charAt in)) Some(in + 1);
-        else None;
-    }
-  }
-
-  object TestList {
-
-    def main(args: Array[String]): unit =
-      if (args.length == 1) {
-        val ps = new ListParsers with ParseString(args(0));
-        ps.expr(ps.input) match {
-          case Some(n) =>
-            Console.println("parsed: " + args(0).substring(0, n));
-          case None =>
-            Console.println("nothing parsed");
-        }
-      }
-      else
-        Console.println("usage: java examples.TestList <expr-string>");
-  }
-
-  object TestExpr {
-
-    def main(args: Array[String]): unit =
-      if (args.length == 1) {
-        val ps = new ExprParsers with ParseString(args(0));
-        ps.expr(ps.input) match {
-          case Some(n) =>
-            Console.println("parsed: " + args(0).substring(0, n));
-          case None =>
-            Console.println("nothing parsed");
-        }
-      }
-      else
-        Console.println("usage: java examples.TestExpr <expr-string>");
-  }
-
-  def main(args: Array[String]): Unit = {
-    TestList.main(Array("(a,b,(1,2))"));
-    TestExpr.main(Array("2+3+(4+1)"))
-  }
-
-}