[template-glib] eval: add support for pointer/pointer comparisons

[Christian Hergert <chergert src gnome org>]

commit c4d9397bc8cd14dc90173b3585f085ef8a88d8ab
Author: Christian Hergert <chergert redhat com>
Date:   Thu May 5 15:30:19 2022 -0700

    eval: add support for pointer/pointer comparisons
    
    That way we can check pointer equality (although we need additional
    checks for object/variant/etc comparisons).

 src/tmpl-expr-eval.c | 27 +++++++++++++++++++++++++++
 tests/test1.script   |  2 ++
 2 files changed, 29 insertions(+)
---
diff --git a/src/tmpl-expr-eval.c b/src/tmpl-expr-eval.c
index 23b65ed..c2797d0 100644
--- a/src/tmpl-expr-eval.c
+++ b/src/tmpl-expr-eval.c
@@ -1689,6 +1689,30 @@ ne_boolean_boolean (const GValue  *left,
   return TRUE;
 }
 
+static gboolean
+eq_pointer_pointer (const GValue  *left,
+                    const GValue  *right,
+                    GValue        *return_value,
+                    GError       **error)
+{
+  g_value_init (return_value, G_TYPE_BOOLEAN);
+  g_value_set_boolean (return_value,
+                       g_value_get_pointer (left) == g_value_get_pointer (right));
+  return TRUE;
+}
+
+static gboolean
+ne_pointer_pointer (const GValue  *left,
+                    const GValue  *right,
+                    GValue        *return_value,
+                    GError       **error)
+{
+  g_value_init (return_value, G_TYPE_BOOLEAN);
+  g_value_set_boolean (return_value,
+                       g_value_get_pointer (left) != g_value_get_pointer (right));
+  return TRUE;
+}
+
 static gboolean
 eq_enum_string (const GValue  *left,
                 const GValue  *right,
@@ -1805,6 +1829,9 @@ build_dispatch_table (void)
   ADD_DISPATCH_FUNC (TMPL_EXPR_EQ,          G_TYPE_BOOLEAN, G_TYPE_BOOLEAN, eq_boolean_boolean);
   ADD_DISPATCH_FUNC (TMPL_EXPR_NE,          G_TYPE_BOOLEAN, G_TYPE_BOOLEAN, ne_boolean_boolean);
 
+  ADD_DISPATCH_FUNC (TMPL_EXPR_EQ,          G_TYPE_POINTER, G_TYPE_POINTER, eq_pointer_pointer);
+  ADD_DISPATCH_FUNC (TMPL_EXPR_NE,          G_TYPE_POINTER, G_TYPE_POINTER, ne_pointer_pointer);
+
 #undef ADD_DISPATCH_FUNC
 
   return table;
diff --git a/tests/test1.script b/tests/test1.script
index 8d13ee2..83b9cdc 100644
--- a/tests/test1.script
+++ b/tests/test1.script
@@ -71,4 +71,6 @@ assert(action)
 assert(typeof(action) == typeof(Gio.SimpleAction))
 assert(typeof(action) != typeof(Gio.SimpleActionGroup))
 
+assert(null == null)
+
 1234;