update to be compatible with new pointer types

2007-12-15  Juerg Billeter  <j@bitron.ch>

	* gee/hashmap.vala, gee/hashset.vala: update to be compatible with new
	  pointer types

	* vala/parser.y, vala/vala.h, vala/valaclass.vala,
	  vala/valadatatype.vala, vala/valamemorymanager.vala,
	  vala/valanulltype.vala, vala/valapointertype.vala,
	  vala/valasemanticanalyzer.vala, vala/valasymbolresolver.vala,
	  vala/valavoidtype.vala, gobject/valaccodegenerator.vala,
	  gobject/valaccodegeneratormethod.vala: use PointerType

svn path=/trunk/; revision=774

1 files changed, 21 insertions, 0 deletions

diff --git a/vala/valanulltype.vala b/vala/valanulltype.vala
index 2efbaaac7..3be020147 100644
--- a/vala/valanulltype.vala
+++ b/vala/valanulltype.vala
@@ -28,4 +28,25 @@ using GLib;
 public class Vala.NullType : ReferenceType {
 	public NullType () {
 	}
+
+	public override bool compatible (DataType! target_type) {
+		if (!(target_type is PointerType) && (target_type is NullType || (target_type.data_type == null && target_type.type_parameter == null))) {
+			return true;
+		}
+
+		/* null can be cast to any reference or array type or pointer type */
+		if (target_type.type_parameter != null ||
+		    target_type is PointerType ||
+		    target_type.data_type.is_reference_type () ||
+		    target_type.is_out ||
+		    target_type.data_type is Pointer ||
+		    target_type.data_type is Array ||
+		    target_type.data_type is Callback ||
+		    target_type.data_type.get_attribute ("PointerType") != null) {
+			return true;
+		}
+
+		/* null is not compatible with any other type (i.e. value types) */
+		return false;
+	}
 }