[vala/wip/transform: 290/373] Basic gvariant deserialization

[Rico Tzschichholz <ricotz src gnome org>]

commit 50d043a8159147e88d60a0d0a0b7f19889c0a9d4
Author: Luca Bruno <lucabru src gnome org>
Date:   Fri Dec 30 14:07:35 2011 +0100

    Basic gvariant deserialization

 codegen/valagvarianttransformer.vala | 43 +++++++++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)
---
diff --git a/codegen/valagvarianttransformer.vala b/codegen/valagvarianttransformer.vala
index c2f09eb49..8e8d7e98c 100644
--- a/codegen/valagvarianttransformer.vala
+++ b/codegen/valagvarianttransformer.vala
@@ -203,7 +203,7 @@ public class Vala.GVariantTransformer : CodeTransformer {
                return (MethodCall) expression (builder+".end ()");
        }
 
-       Expression serialize_struct (Struct st, Expression expr) {
+       Expression? serialize_struct (Struct st, Expression expr) {
                string temp = b.add_temp_declaration (expr.value_type, expr);
 
                var builderinit = expression ("new GLib.VariantBuilder (GLib.VariantType.TUPLE)");
@@ -264,6 +264,47 @@ public class Vala.GVariantTransformer : CodeTransformer {
                return result;
        }
 
+       Expression deserialize_basic (BasicTypeInfo basic_type, Expression expr) {
+               if (basic_type.is_string) {
+                       var call = new MethodCall (new MemberAccess (expr, "get_string", b.source_reference), 
b.source_reference);
+                       call.add_argument (new NullLiteral ());
+                       return call;
+               }
+
+               return new MethodCall (new MemberAccess (expr, "get_" + basic_type.type_name, 
b.source_reference), b.source_reference);
+       }
+
+       Expression? deserialize_expression (DataType type, Expression expr) {
+               BasicTypeInfo basic_type;
+               Expression result = null;
+               if (get_basic_type_info (get_type_signature (type), out basic_type)) {
+                       result = deserialize_basic (basic_type, expr);
+               }
+               return result;
+       }
+
+       public override void visit_cast_expression (CastExpression expr) {
+               base.visit_cast_expression (expr);
+
+               if (!(expr.inner.value_type.data_type == context.analyzer.gvariant_type.data_type && 
expr.type_reference.data_type != context.analyzer.gvariant_type.data_type)) {
+                       return;
+               }
+
+               b = new CodeBuilder (context, expr.parent_statement, expr.source_reference);
+               var old_parent_node = expr.parent_node;
+               var target_type = expr.target_type.copy ();
+
+               Expression result = deserialize_expression (expr.type_reference, expr.inner);
+
+               result.target_type = target_type;
+               context.analyzer.replaced_nodes.add (expr);
+               old_parent_node.replace_expression (expr, result);
+               foreach (var node in b.check_nodes) {
+                       check (node);
+               }
+               check (result);
+       }
+
        public override void visit_expression (Expression expr) {
                base.visit_expression (expr);