1 files changed, 54 insertions, 0 deletions
diff --git a/src/library/scala/xml/path/Expression.scala b/src/library/scala/xml/path/Expression.scala
new file mode 100644
index 0000000000..cf6c6d552f
--- /dev/null
+++ b/src/library/scala/xml/path/Expression.scala
@@ -0,0 +1,54 @@
+package scala.xml.path;
+
+object Expression {
+
+  final def testFromString(x: String): Test = {
+    x.charAt(0) match {
+      case '*' if( x.length() == 1 ) => WildcardTest;
+      case _                         => NameTest(x);
+    }
+  }
+
+  case class FExp(e:Expr, c:Cond) {
+    def eval(n: Node): NodeSeq = new NodeSeq { val theSeq=Nil}; // @todo
+  }
+
+  abstract class GenExp ;
+  case class Attrib(test: NameTest, e: Expr) extends GenExp;
+
+  abstract class Expr extends GenExp {
+    def \ (x: String) =
+      if( x=="*")
+        Child(WildcardTest, this)
+      else
+        Child(NameTest(x), this);
+
+    def \\ (x: String) =
+      if( x=="*")
+        DescOrSelf(WildcardTest, this)
+      else
+        DescOrSelf(NameTest(x), this);
+
+    def apply(c: Cond) = FExp(this, c);
+
+    def eval(n: Node): NodeSeq = new NodeSeq { val theSeq=Nil}; // @todo
+  }
+
+  case object Root extends Expr;
+
+  case class Child(test: Test, e: Expr) extends Expr;
+  case class DescOrSelf(test: Test, e: Expr) extends Expr;
+
+
+  abstract class Test;
+
+  case object WildcardTest extends Test; //                "x \ *  "
+  case class  NameTest(label: String) extends Test; //     "x \ bar"
+
+
+  abstract class Cond;
+
+  case class Exists(p: GenExp) extends Cond ;  //          "p [ p ]"
+  case class Equals(p: Expr, c:String) extends Cond ; //   "p [ @p == bla ]"
+
+}