[vala/staging] codegen: Apply G_PARAM_EXPLICIT_NOTIFY on properties with "notify = false"

[Rico Tzschichholz <ricotz src gnome org>]

commit 02e91469f06c5497240f92cf6f9eb5b6c20aa0a9
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sat Mar 31 21:45:03 2018 +0200

    codegen: Apply G_PARAM_EXPLICIT_NOTIFY on properties with "notify = false"
    
    This requires --target-glib=2.42 to be passed.

 codegen/valagtypemodule.vala       |    3 +++
 tests/Makefile.am                  |    1 +
 tests/objects/property-notify.vala |   36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 40 insertions(+), 0 deletions(-)
---
diff --git a/codegen/valagtypemodule.vala b/codegen/valagtypemodule.vala
index 3e553ec..93f11da 100644
--- a/codegen/valagtypemodule.vala
+++ b/codegen/valagtypemodule.vala
@@ -2016,6 +2016,9 @@ public class Vala.GTypeModule : GErrorModule {
                                }
                        }
                }
+               if (context.require_glib_version (2, 42) && !prop.notify) {
+                       pflags = "%s%s".printf (pflags, " | G_PARAM_EXPLICIT_NOTIFY");
+               }
                if (prop.version.deprecated) {
                        pflags = "%s%s".printf (pflags, " | G_PARAM_DEPRECATED");
                }
diff --git a/tests/Makefile.am b/tests/Makefile.am
index d4e4906..0645f2f 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -235,6 +235,7 @@ TESTS = \
        objects/methods.vala \
        objects/paramspec.vala \
        objects/properties.vala \
+       objects/property-notify.vala \
        objects/regex.vala \
        objects/signals.vala \
        objects/signals-delegate.vala \
diff --git a/tests/objects/property-notify.vala b/tests/objects/property-notify.vala
new file mode 100644
index 0000000..d2e02b2
--- /dev/null
+++ b/tests/objects/property-notify.vala
@@ -0,0 +1,36 @@
+class Foo : Object {
+       [CCode (notify = false)]
+       public string foo { get; set; }
+
+       public string bar { get; set; }
+
+       public string manam { get; set; }
+}
+
+void fail () {
+       assert_not_reached ();
+}
+
+int counter;
+void count () {
+       counter++;
+}
+
+void main () {
+       var foo = new Foo ();
+
+       foo.notify["foo"].connect (fail);
+       //FIXME Requires --target-glib=2.42 for G_PARAM_EXPLICIT_NOTIFY to be actually added
+       //foo.set_property ("foo", "foo");
+       foo.foo = "foo";
+
+       counter = 0;
+       foo.notify["bar"].connect (count);
+       foo.bar = "bar";
+       assert (counter == 1);
+
+       counter = 0;
+       foo.notify["manam"].connect (count);
+       foo.set_property ("manam", "manam");
+       assert (counter == 1);
+}