[vala/0.46] vala: Improve copy of required attributes from delegate to lamdba method

[Rico Tzschichholz <ricotz src gnome org>]

commit a1dc8decce57fdf7acd1ab9b03b9c1bb6f0787f7
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Tue Mar 17 15:26:36 2020 +0100

    vala: Improve copy of required attributes from delegate to lamdba method

 codegen/valaccodebasemodule.vala | 5 -----
 vala/valalambdaexpression.vala   | 8 ++++++++
 2 files changed, 8 insertions(+), 5 deletions(-)
---
diff --git a/codegen/valaccodebasemodule.vala b/codegen/valaccodebasemodule.vala
index 9ae993be8..9616cd176 100644
--- a/codegen/valaccodebasemodule.vala
+++ b/codegen/valaccodebasemodule.vala
@@ -5879,11 +5879,6 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
 
        public override void visit_lambda_expression (LambdaExpression lambda) {
                var delegate_type = (DelegateType) lambda.target_type;
-               var d = delegate_type.delegate_symbol;
-
-               lambda.method.set_attribute_bool ("CCode", "array_length", get_ccode_array_length (d));
-               lambda.method.set_attribute_bool ("CCode", "array_null_terminated", 
get_ccode_array_null_terminated (d));
-               lambda.method.set_attribute_string ("CCode", "array_length_type", get_ccode_array_length_type 
(d));
 
                lambda.accept_children (this);
 
diff --git a/vala/valalambdaexpression.vala b/vala/valalambdaexpression.vala
index 0c55568ac..a5b96c2a6 100644
--- a/vala/valalambdaexpression.vala
+++ b/vala/valalambdaexpression.vala
@@ -137,6 +137,14 @@ public class Vala.LambdaExpression : Expression {
                method.used = true;
                method.version.check (source_reference);
 
+               if (return_type is ArrayType) {
+                       method.copy_attribute_bool (cb, "CCode", "array_length");
+                       method.copy_attribute_bool (cb, "CCode", "array_null_terminated");
+                       method.copy_attribute_string (cb, "CCode", "array_length_type");
+               } else if (return_type is DelegateType) {
+                       method.copy_attribute_bool (cb, "CCode", "delegate_target");
+               }
+
                if (!cb.has_target || !context.analyzer.is_in_instance_method ()) {
                        method.binding = MemberBinding.STATIC;
                } else {