[glibmm] gmmproc: Use nullptr instead of 0.

[Murray Cumming <murrayc src gnome org>]

commit 6f6e91dc4b7d55cf9ca90c10189f0238774ffaa8
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Nov 19 12:58:14 2015 +0100

    gmmproc: Use nullptr instead of 0.

 glib/src/value_basictypes.cc.m4   |    2 +-
 tools/m4/class_boxedtype.m4       |    4 ++--
 tools/m4/class_opaque_copyable.m4 |    6 +++---
 tools/m4/ctor.m4                  |   14 +++++++-------
 tools/pm/Output.pm                |   10 +++++-----
 5 files changed, 18 insertions(+), 18 deletions(-)
---
diff --git a/glib/src/value_basictypes.cc.m4 b/glib/src/value_basictypes.cc.m4
index 090b33b..fd5f775 100644
--- a/glib/src/value_basictypes.cc.m4
+++ b/glib/src/value_basictypes.cc.m4
@@ -48,7 +48,7 @@ $1 Value<$1>::get() const
 GParamSpec* Value<$1>::create_param_spec(const Glib::ustring& name) const
 {
   return g_param_spec_[]ifelse($2,schar,char,$2)(
-      name.c_str(), 0, 0,ifelse($2,pointer,,[
+      name.c_str(), nullptr, nullptr,ifelse($2,pointer,,[
       ifelse($3,,,[$3, $4, ])[]g_value_get_$2(&gobject_),])
       GParamFlags(G_PARAM_READABLE | G_PARAM_WRITABLE));
 }
diff --git a/tools/m4/class_boxedtype.m4 b/tools/m4/class_boxedtype.m4
index 58682f1..32b42ad 100644
--- a/tools/m4/class_boxedtype.m4
+++ b/tools/m4/class_boxedtype.m4
@@ -123,7 +123,7 @@ ifdef(`__BOOL_CUSTOM_DEFAULT_CTOR__',`dnl
 __CPPNAME__::__CPPNAME__`'()
 :
 ifelse(__BOXEDTYPE_FUNC_NEW,NONE,`dnl
-  gobject_ (0) // Allows creation of invalid wrapper, e.g. for output arguments to methods.
+  gobject_ (nullptr) // Allows creation of invalid wrapper, e.g. for output arguments to methods.
 ',`dnl else
   gobject_ (__BOXEDTYPE_FUNC_NEW`'())
 ')dnl
@@ -132,7 +132,7 @@ ifelse(__BOXEDTYPE_FUNC_NEW,NONE,`dnl
 
 __CPPNAME__::__CPPNAME__`'(const __CPPNAME__& other)
 :
-  gobject_ ((other.gobject_) ? __BOXEDTYPE_FUNC_COPY`'(other.gobject_) : 0)
+  gobject_ ((other.gobject_) ? __BOXEDTYPE_FUNC_COPY`'(other.gobject_) : nullptr)
 {}
 
 __CPPNAME__::__CPPNAME__`'(__CPPNAME__&& other) noexcept
diff --git a/tools/m4/class_opaque_copyable.m4 b/tools/m4/class_opaque_copyable.m4
index cfe7915..4fdab1e 100644
--- a/tools/m4/class_opaque_copyable.m4
+++ b/tools/m4/class_opaque_copyable.m4
@@ -97,7 +97,7 @@ ifdef(`__BOOL_CUSTOM_DEFAULT_CTOR__',`dnl
 __CPPNAME__::__CPPNAME__`'()
 :
 ifelse(__OPAQUE_FUNC_NEW,NONE,`dnl
-  gobject_ (0) // Allows creation of invalid wrapper, e.g. for output arguments to methods.
+  gobject_ (nullptr) // Allows creation of invalid wrapper, e.g. for output arguments to methods.
 ',`dnl else
   gobject_ (__OPAQUE_FUNC_NEW`'())
 ')dnl
@@ -106,7 +106,7 @@ ifelse(__OPAQUE_FUNC_NEW,NONE,`dnl
 
 __CPPNAME__::__CPPNAME__`'(const __CPPNAME__& src)
 :
-  gobject_ ((src.gobject_) ? __OPAQUE_FUNC_COPY`'(src.gobject_) : 0)
+  gobject_ ((src.gobject_) ? __OPAQUE_FUNC_COPY`'(src.gobject_) : nullptr)
 {}
 
 ifdef(`__BOOL_CUSTOM_CTOR_CAST__',,`dnl else
@@ -133,7 +133,7 @@ ifelse(__OPAQUE_FUNC_COPY,NONE,`dnl
 ',`dnl else
 __CPPNAME__& __CPPNAME__::operator=(const __CPPNAME__`'& src)
 {
-  const auto new_gobject = (src.gobject_) ? __OPAQUE_FUNC_COPY`'(src.gobject_) : 0;
+  const auto new_gobject = (src.gobject_) ? __OPAQUE_FUNC_COPY`'(src.gobject_) : nullptr;
 
   if(gobject_)
     __OPAQUE_FUNC_FREE`'(gobject_);
diff --git a/tools/m4/ctor.m4 b/tools/m4/ctor.m4
index cca77e1..c9dd414 100644
--- a/tools/m4/ctor.m4
+++ b/tools/m4/ctor.m4
@@ -19,7 +19,7 @@ _PUSH(SECTION_CC)
 __CPPNAME__::__CPPNAME__`'()
 :
   // Mark this class as non-derived to allow C++ vfuncs to be skipped.
-  Glib::ObjectBase(0),
+  Glib::ObjectBase(nullptr),
   __CPPPARENT__`'(Glib::ConstructParams(__BASE__`'_class_.init()))
 {
   _IMPORT(SECTION_CC_INITIALIZE_CLASS_EXTRA)
@@ -39,8 +39,8 @@ _PUSH(SECTION_CC)
 __CPPNAME__::$1`'($3)
 :
   // Mark this class as non-derived to allow C++ vfuncs to be skipped.
-  Glib::ObjectBase(0),
-  __CPPPARENT__`'(Glib::ConstructParams(__BASE__`'_class_.init()m4_ifelse(`$4',,,`, $4, 
static_cast<char*>(0)')))
+  Glib::ObjectBase(nullptr),
+  __CPPPARENT__`'(Glib::ConstructParams(__BASE__`'_class_.init()m4_ifelse(`$4',,,`, $4, nullptr')))
 {
   _IMPORT(SECTION_CC_INITIALIZE_CLASS_EXTRA)
 
@@ -51,16 +51,16 @@ _POP()')
 
 m4_define(`_CONSTRUCT',
  `// Mark this class as non-derived to allow C++ vfuncs to be skipped.
-  Glib::ObjectBase(0),
-  __CPPPARENT__`'(Glib::ConstructParams(__BASE__`'_class_.init()m4_ifelse(`$1',,,`, $@, 
static_cast<char*>(0)')))')
+  Glib::ObjectBase(nullptr),
+  __CPPPARENT__`'(Glib::ConstructParams(__BASE__`'_class_.init()m4_ifelse(`$1',,,`, $@, nullptr')))')
 
 dnl _CONSTRUCT() does not deal with multiple class definitions in one file.
 dnl If necessary, _CONSTRUCT_SPECIFIC(BaseClass, Class) must be used instead.
 dnl
 m4_define(`_CONSTRUCT_SPECIFIC',
  `// Mark this class as non-derived to allow C++ vfuncs to be skipped.
-  Glib::ObjectBase(0),
-  $1`'(Glib::ConstructParams(_LOWER(`$2')_class_.init()m4_ifelse(`$3',,,`, m4_shift(m4_shift($@)), 
static_cast<char*>(0)')))')
+  Glib::ObjectBase(nullptr),
+  $1`'(Glib::ConstructParams(_LOWER(`$2')_class_.init()m4_ifelse(`$3',,,`, m4_shift(m4_shift($@)), 
nullptr')))')
 
 dnl Extra code for initialize_class.
 dnl Not commonly used.
diff --git a/tools/pm/Output.pm b/tools/pm/Output.pm
index 71c2ceb..acb6dd8 100644
--- a/tools/pm/Output.pm
+++ b/tools/pm/Output.pm
@@ -1185,11 +1185,11 @@ sub convert_args_cpp_to_c($$$$$)
     if(!($possible_arg_list =~ /\b$cpp_param_index\b/))
     {
       # If the C++ index is not found in the list of desired parameters, pass
-      # NULL to the C func unless the param is not optional (applies to a
+      # nullptr to the C func unless the param is not optional (applies to a
       # possibly added GError parameter).
       if (($$cpp_param_flags[$cpp_param_index] & FLAG_PARAM_OPTIONAL))
       {
-        push(@conversions, "0");
+        push(@conversions, "nullptr");
         next;
       }
     }
@@ -1268,7 +1268,7 @@ sub convert_args_cpp_to_c($$$$$)
       if (($$cpp_param_flags[$cpp_param_index] & FLAG_PARAM_OPTIONAL) &&
        $cppParamType =~ /^(const\s+)?(std::string|Glib::ustring)&?/)
       {
-        push(@conversions, "$cppParamName.empty() ? 0 : " . $std_conversion);
+        push(@conversions, "$cppParamName.empty() ? nullptr : " . $std_conversion);
       }
       else
       {
@@ -1294,7 +1294,7 @@ sub convert_args_cpp_to_c($$$$$)
     }
     else
     {
-      push(@conversions, "0")
+      push(@conversions, "nullptr")
     }
   }
 
@@ -1528,7 +1528,7 @@ sub get_ctor_properties($$$$$$)
       # NULL to the C func unless the param is not optional.
       if (~($$cpp_param_flags[$cpp_param_index] & FLAG_PARAM_OPTIONAL))
       {
-        push(@result, "0");
+        push(@result, "nullptr");
         next;
       }
     }