Re: [Vala] Gda.DataModel.get_value_at C generated code is incorrect

[Daniel Espinosa <esodan gmail com>]

I've created an example, but no errors is generated, even C code is as
expected. Please help me!

namespace Example {
        errordomain InError {
                GENERAL
        }
        public interface In {
                [CCode (vfunc_name = "i_fun")]
                public abstract void fun (int a, int b) throws Error;
                [CCode (vfunc_name = "i_fo")]
                public abstract void fo ();
        }
        
        class App : Object, In {
                public void fun (int a, int b) throws Error {
                        stdout.printf("a=%i; b=%i\n", a, b);
                        throw new InError.GENERAL("Fake error");
                }
                
                public void fo () {
                        stdout.printf("Fo....\n");
                }
                
                public static int main (string[] args) {
                        var a = new App();
                        a.fo();
                        try {
                                a.fun(4,5);
                        }
                        catch (Error e) {
                                stdout.printf("Error: %s\n", e.message);
                        }
                        return 0;
                }
        }
}

2011/10/24 Daniel Espinosa <esodan gmail com>:
> Vala autogenerated bindings of GDA (master) shows that:
>
> [CCode (vfunc_name = "i_get_value_at")]
> public abstract GLib.Value get_value_at (int col, int row) throws GLib.Error;
> /* i_get_value_at is a virtual function in GdaDataModel Interface */
>
>
> And GDA bindings in Vala 0.14 shows:
>
> public unowned GLib.Value? get_value_at (int col, int row) throws GLib.Error;
>
>
> Why the following code doesn't compile under libgda-5.0 (master)
> bindings, but only using libgda-4.0 (Vala):
>
> namespace Bug {
>        public static int main (string[] args) {
>                var c = Gda.Connection.open_from_string("Sqlite",
> "SQLite://DB_DIR=.;DB_NAME=test", null,
> Gda.ConnectionOptions.READ_ONLY);
>                if (c.is_opened()) {
>                        var m = c.execute_select_command("SELECT MAX(n) FROM val");
>                        stdout.printf("Rows and columns: %i, %i\n", m.get_n_rows(),
> m.get_n_columns());
>                        Value v = m.get_value_at(0,0);
>                        stdout.printf("Value is type: %s\n", v.type_name());
>                }
>                return 0;
>        }
> }
>
> The error messages are:
>
> bug-DataModel-get-value-at.vala:3.11-3.124: warning: unhandled error
> `GLib.Error'
>                var c = Gda.Connection.open_from_string("Sqlite",
> "SQLite://DB_DIR=.;DB_NAME=test", null,
> Gda.ConnectionOptions.READ_ONLY);
>                        
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> bug-DataModel-get-value-at.vala:5.12-5.61: warning: unhandled error `GLib.Error'
>                        var m = c.execute_select_command("SELECT MAX(n) FROM val");
>                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> bug-DataModel-get-value-at.vala:7.14-7.32: warning: unhandled error `GLib.Error'
>                        Value v = m.get_value_at(0,0);
>                                  ^^^^^^^^^^^^^^^^^^^
> /home/esodan/Proyectos/bug-DataModel-get-value-at.vala.c: In function
> 'bug_main':
> /home/esodan/Proyectos/bug-DataModel-get-value-at.vala.c:65:3:
> warning: passing argument 4 of 'gda_data_model_get_value_at' from
> incompatible pointer type [enabled by default]
> /usr/include/libgda-5.0/libgda/gda-data-model.h:184:21: note: expected
> 'struct GError **' but argument is of type 'struct GValue *'
> /home/esodan/Proyectos/bug-DataModel-get-value-at.vala.c:65:3: error:
> too many arguments to function 'gda_data_model_get_value_at'
> /usr/include/libgda-5.0/libgda/gda-data-model.h:184:21: note: declared here
> error: cc exited with status 256
> Compilation failed: 1 error(s), 3 warning(s)