[vala/wip/attributes: 103/119] On demand Enum.is_flags

[Luca Bruno <lucabru src gnome org>]

commit a1d27719b89c257222f33681166301b7256a67c5
Author: Luca Bruno <lucabru src gnome org>
Date:   Sun Jul 3 12:55:09 2011 +0200

    On demand Enum.is_flags

 vala/valaenum.vala |   24 ++++++++++--------------
 1 files changed, 10 insertions(+), 14 deletions(-)
---
diff --git a/vala/valaenum.vala b/vala/valaenum.vala
index 367e2c8..eeabda9 100644
--- a/vala/valaenum.vala
+++ b/vala/valaenum.vala
@@ -29,12 +29,21 @@ public class Vala.Enum : TypeSymbol {
 	/**
 	 * Specifies whether this is a flags enum.
 	 */
-	public bool is_flags { get; set; }
+	public bool is_flags {
+		get {
+			if (_is_flags == null) {
+				_is_flags = get_attribute ("Flags") != null;
+			}
+			return _is_flags;
+		}
+	}
 
 	private List<EnumValue> values = new ArrayList<EnumValue> ();
 	private List<Method> methods = new ArrayList<Method> ();
 	private List<Constant> constants = new ArrayList<Constant> ();
 
+	private bool? _is_flags;
+
 	/**
 	 * Creates a new enum.
 	 *
@@ -147,17 +156,6 @@ public class Vala.Enum : TypeSymbol {
 		return false;
 	}
 
-	/**
-	 * Process all associated attributes.
-	 */
-	public void process_attributes () {
-		foreach (Attribute a in attributes) {
-			if (a.name == "Flags") {
-				is_flags = true;
-			}
-		}
-	}
-
 	public override bool check (CodeContext context) {
 		if (checked) {
 			return !error;
@@ -165,8 +163,6 @@ public class Vala.Enum : TypeSymbol {
 
 		checked = true;
 
-		process_attributes ();
-
 		var old_source_file = context.analyzer.current_source_file;
 		var old_symbol = context.analyzer.current_symbol;