[vala/wip/issue/871: 77/77] codegen: Pass type-parameter as properties on gobject style construction

[Rico Tzschichholz <ricotz src gnome org>]

commit eb952a292b8ea744c8fde5417c9fe6c2c2c3f1a2
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Dec 6 15:17:59 2019 +0100

    codegen: Pass type-parameter as properties on gobject style construction

 codegen/valaccodemethodcallmodule.vala | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)
---
diff --git a/codegen/valaccodemethodcallmodule.vala b/codegen/valaccodemethodcallmodule.vala
index 2413bc99a..ee6fea781 100644
--- a/codegen/valaccodemethodcallmodule.vala
+++ b/codegen/valaccodemethodcallmodule.vala
@@ -141,7 +141,21 @@ public class Vala.CCodeMethodCallModule : CCodeAssignmentModule {
                                ccall.add_argument (get_this_cexpression ());
                        }
 
-                       if (!current_class.is_compact) {
+                       if (current_class.is_subtype_of (gobject_type) && get_ccode_real_name (m) == 
"g_object_new") {
+                               // gobject-style creation
+                               int type_param_index = 0;
+                               foreach (TypeParameter type_param in current_class.get_type_parameters ()) {
+                                       var type_param_name = type_param.name.down ();
+                                       var type_param_name_canon = type_param_name.replace ("_", "-");
+                                       in_arg_map.set (get_param_pos (0.1 * type_param_index + 0.01), new 
CCodeConstant ("\"%s-type\"".printf (type_param_name_canon)));
+                                       in_arg_map.set (get_param_pos (0.1 * type_param_index + 0.03), new 
CCodeConstant ("\"%s-dup-func\"".printf (type_param_name_canon)));
+                                       in_arg_map.set (get_param_pos (0.1 * type_param_index + 0.05), new 
CCodeConstant ("\"%s-destroy-func\"".printf (type_param_name_canon)));
+                                       in_arg_map.set (get_param_pos (0.1 * type_param_index + 0.02), new 
CCodeIdentifier ("%s_type".printf (type_param_name)));
+                                       in_arg_map.set (get_param_pos (0.1 * type_param_index + 0.04), new 
CCodeIdentifier ("%s_dup_func".printf (type_param_name)));
+                                       in_arg_map.set (get_param_pos (0.1 * type_param_index + 0.06), new 
CCodeIdentifier ("%s_destroy_func".printf (type_param_name)));
+                                       type_param_index++;
+                               }
+                       } else if (!current_class.is_compact) {
                                if (current_class != m.parent_symbol) {
                                        // chain up to base class
                                        foreach (DataType base_type in current_class.get_base_types ()) {
@@ -333,7 +347,7 @@ public class Vala.CCodeMethodCallModule : CCodeAssignmentModule {
                                ccode.add_assignment (new CCodeMemberAccess.pointer (get_variable_cexpression 
("_data%d_".printf (get_block_id (current_method.body))), "self"), ref_call);
                        }
 
-                       if (!current_class.is_compact && current_class.has_type_parameters ()) {
+                       if (!current_class.is_compact && current_class.has_type_parameters () && 
!current_class.is_subtype_of (gobject_type)) {
                                /* type, dup func, and destroy func fields for generic types */
                                var suffices = new string[] {"type", "dup_func", "destroy_func"};
                                foreach (TypeParameter type_param in current_class.get_type_parameters ()) {