[vala/wip/transform: 62/107] Fix for statement and foreach on GList

[Rico Tzschichholz <ricotz src gnome org>]

commit bb5a0959d7f5a28947117d9f9a8e5b4d0b732e46
Author: Luca Bruno <lucabru src gnome org>
Date:   Sat Feb 11 23:22:58 2012 +0100

    Fix for statement and foreach on GList

 codegen/valaccodetransformer.vala | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)
---
diff --git a/codegen/valaccodetransformer.vala b/codegen/valaccodetransformer.vala
index 92df673ec..12c0a033b 100644
--- a/codegen/valaccodetransformer.vala
+++ b/codegen/valaccodetransformer.vala
@@ -217,6 +217,15 @@ public class Vala.CCodeTransformer : CodeTransformer {
 
                if (stmt.condition == null || !always_false (stmt.condition)) {
                        b.open_loop ();
+                       var notfirst = b.add_temp_declaration (null, expression ("false"));
+                       b.open_if (expression (notfirst));
+                       foreach (var it_expr in stmt.get_iterator ()) {
+                               b.add_expression (it_expr);
+                       }
+                       b.add_else ();
+                       b.add_assignment (expression (notfirst), expression ("true"));
+                       b.close ();
+
                        if (stmt.condition != null && !always_true (stmt.condition)) {
                                b.open_if (new UnaryExpression (UnaryOperator.LOGICAL_NEGATION, 
stmt.condition, stmt.source_reference));
                                b.add_break ();
@@ -224,9 +233,6 @@ public class Vala.CCodeTransformer : CodeTransformer {
                        }
                        b.add_statement (stmt.body);
 
-                       foreach (var it_expr in stmt.get_iterator ()) {
-                               b.add_expression (it_expr);
-                       }
                        b.close ();
                }
 
@@ -261,8 +267,11 @@ public class Vala.CCodeTransformer : CodeTransformer {
                        break;
                case ForeachIteration.GLIST:
                        // GList or GSList
-                       b.open_for (null, expression (@"$collection != null"), expression (@"$collection = 
$collection.next"));
-                       stmt.element_variable.initializer = expression (@"$collection.data");
+                       var iter_type = stmt.collection.value_type.copy ();
+                       iter_type.value_owned = false;
+                       var iter = b.add_temp_declaration (iter_type, expression (collection));
+                       b.open_for (null, expression (@"$iter != null"), expression (@"$iter = $iter.next"));
+                       stmt.element_variable.initializer = expression (@"$iter.data");
                        break;
                case ForeachIteration.INDEX:
                        // get()+size