[vala/wip/foreach: 6/7] vala: Additionally look for "length" property for "foreach with index"

[Rico Tzschichholz <ricotz src gnome org>]

commit 616a5b19f172ff9c2a8cccc334b18d795d254cda
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Nov 9 15:06:20 2020 +0100

    vala: Additionally look for "length" property for "foreach with index"

 vala/valaforeachstatement.vala | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/vala/valaforeachstatement.vala b/vala/valaforeachstatement.vala
index 66dbbdc50..94f6b9dc9 100644
--- a/vala/valaforeachstatement.vala
+++ b/vala/valaforeachstatement.vala
@@ -206,6 +206,9 @@ public class Vala.ForeachStatement : Block {
                }
                var size_property = collection_type.get_member ("size") as Property;
                if (size_property == null) {
+                       size_property = collection_type.get_member ("length") as Property;
+               }
+               if (size_property == null || !(size_property.property_type is IntegerType)) {
                        return false;
                }
 
@@ -214,7 +217,7 @@ public class Vala.ForeachStatement : Block {
                        list_type.value_owned = false;
                }
                add_statement (new DeclarationStatement (new LocalVariable (list_type, "_%s_list".printf 
(variable_name), collection, source_reference), source_reference));
-               add_statement (new DeclarationStatement (new LocalVariable (null, "_%s_size".printf 
(variable_name), new MemberAccess (new MemberAccess.simple ("_%s_list".printf (variable_name), 
source_reference), "size", source_reference), source_reference), source_reference));
+               add_statement (new DeclarationStatement (new LocalVariable (null, "_%s_size".printf 
(variable_name), new MemberAccess (new MemberAccess.simple ("_%s_list".printf (variable_name), 
source_reference), size_property.name, source_reference), source_reference), source_reference));
                add_statement (new DeclarationStatement (new LocalVariable (null, "_%s_index".printf 
(variable_name), new UnaryExpression (UnaryOperator.MINUS, new IntegerLiteral ("1", source_reference), 
source_reference), source_reference), source_reference));
                var next = new UnaryExpression (UnaryOperator.INCREMENT, new MemberAccess.simple 
("_%s_index".printf (variable_name), source_reference), source_reference);
                var conditional = new BinaryExpression (BinaryOperator.LESS_THAN, next, new 
MemberAccess.simple ("_%s_size".printf (variable_name), source_reference), source_reference);