1 files changed, 51 insertions, 0 deletions
diff --git a/dcop/dcopidlng/Ast.pm b/dcop/dcopidlng/Ast.pm
new file mode 100644
index 000000000..65af89e63
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+++ b/dcop/dcopidlng/Ast.pm
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+package Ast;
+use strict;
+
+use vars qw/ $this $pack @endCodes /;
+
+#-----------------------------------------------------------------------------
+# This package is used  to create a simple Abstract Syntax tree. Each node
+# in the AST is an associative array and supports two kinds of properties -
+# scalars and lists of scalars.
+# See SchemParser.pm for an example of usage.
+#                                                               ... Sriram
+#-----------------------------------------------------------------------------
+
+# Constructor 
+# e.g AST::New ("personnel")
+# Stores the argument in a property called astNodeName whose sole purpose
+# is to support Print()
+
+sub New {
+	my ($this) = {"astNodeName" => $_[0]};
+	bless ($this);
+	return $this;
+}
+
+# Add a property to this object
+# $astNode->AddProp("className", "Employee");
+
+sub AddProp {
+	my ($this) = $_[0];
+	$this->{$_[1]} = $_[2];
+}
+
+# Equivalent to AddProp, except the property name is associated
+# with a list of values
+# $classAstNode->AddProp("attrList", $attrAstNode);
+
+sub AddPropList {
+	my ($this) = $_[0];
+	if (! exists $this->{$_[1]}) {
+		$this->{$_[1]} = [];
+	}
+	push (@{$this->{$_[1]}}, $_[2]);
+}
+
+# Returns a list of all the property names of this object
+sub GetProps {
+	my ($this) = $_[0];
+	return keys %{$this};
+}
+
+1;