[vala/wip/ricotz: 2/2] codegen: Append G_GNUC_FORMAT attribute to FormatArg function-declarations

[Rico Tzschichholz <ricotz src gnome org>]

commit 2fb6a88d413ed0f81b309fa05ee82bffdcf602da
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Nov 7 18:57:15 2016 +0100

    codegen: Append G_GNUC_FORMAT attribute to FormatArg function-declarations

 codegen/valaccodemethodmodule.vala |    6 ++++++
 vala/valamemberaccess.vala         |    2 +-
 2 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/codegen/valaccodemethodmodule.vala b/codegen/valaccodemethodmodule.vala
index 19f507b..e39e321 100644
--- a/codegen/valaccodemethodmodule.vala
+++ b/codegen/valaccodemethodmodule.vala
@@ -173,6 +173,12 @@ public abstract class Vala.CCodeMethodModule : CCodeStructModule {
                        function.modifiers |= CCodeModifiers.DEPRECATED;
                }
 
+               var format_arg = m.get_format_arg_index ();
+               if (format_arg > -1) {
+                       format_arg += (MemberAccess.is_instance_symbol (m) ? 2 : 1);
+                       function.attributes = "G_GNUC_FORMAT(%d)".printf (format_arg);
+               }
+
                var cparam_map = new HashMap<int,CCodeParameter> (direct_hash, direct_equal);
                var carg_map = new HashMap<int,CCodeExpression> (direct_hash, direct_equal);
 
diff --git a/vala/valamemberaccess.vala b/vala/valamemberaccess.vala
index 6911bef..f46a713 100644
--- a/vala/valamemberaccess.vala
+++ b/vala/valamemberaccess.vala
@@ -866,7 +866,7 @@ public class Vala.MemberAccess : Expression {
                return !error;
        }
 
-       static bool is_instance_symbol (Symbol symbol) {
+       public static bool is_instance_symbol (Symbol symbol) {
                if (symbol is Field && ((Field) symbol).binding == MemberBinding.INSTANCE) {
                        return true;
                } else if (symbol is Method && !(symbol is CreationMethod) && ((Method) symbol).binding == 
MemberBinding.INSTANCE) {