glsl: Add a macro for the default values for glsl_struct_field

There are two constructors for glsl_struct_field with different
parameters. Instead of repeating them for both constructors, this
patch adds a convenience macro. This will make it easier to add a
third constructor in a later patch.

Reviewed-by: Eric Anholt <eric@anholt.net>

diff --git a/src/compiler/glsl_types.h b/src/compiler/glsl_types.h
index 3fd49a7..439dcca 100644 (file)
--- a/src/compiler/glsl_types.h
+++ b/src/compiler/glsl_types.h
@@ -1245,29 +1245,27 @@ struct glsl_struct_field {
 
    unsigned implicit_sized_array:1;
 #ifdef __cplusplus
+#define DEFAULT_CONSTRUCTORS(_type, _name)                              \
+   type(_type), name(_name), location(-1), offset(-1), xfb_buffer(0),   \
+   xfb_stride(0), interpolation(0), centroid(0),                        \
+   sample(0), matrix_layout(GLSL_MATRIX_LAYOUT_INHERITED), patch(0),    \
+   precision(GLSL_PRECISION_NONE), memory_read_only(0),                 \
+   memory_write_only(0), memory_coherent(0), memory_volatile(0),        \
+   memory_restrict(0), image_format(0), explicit_xfb_buffer(0),         \
+   implicit_sized_array(0)
+
    glsl_struct_field(const struct glsl_type *_type, const char *_name)
-      : type(_type), name(_name), location(-1), offset(-1), xfb_buffer(0),
-        xfb_stride(0), interpolation(0), centroid(0),
-        sample(0), matrix_layout(GLSL_MATRIX_LAYOUT_INHERITED), patch(0),
-        precision(GLSL_PRECISION_NONE), memory_read_only(0),
-        memory_write_only(0), memory_coherent(0), memory_volatile(0),
-        memory_restrict(0), image_format(0), explicit_xfb_buffer(0),
-        implicit_sized_array(0)
+      : DEFAULT_CONSTRUCTORS(_type, _name)
    {
       /* empty */
    }
 
    glsl_struct_field()
-      : type(NULL), name(NULL), location(-1), offset(-1), xfb_buffer(0),
-        xfb_stride(0), interpolation(0), centroid(0),
-        sample(0), matrix_layout(0), patch(0),
-        precision(0), memory_read_only(0),
-        memory_write_only(0), memory_coherent(0), memory_volatile(0),
-        memory_restrict(0), image_format(0), explicit_xfb_buffer(0),
-        implicit_sized_array(0)
+      : DEFAULT_CONSTRUCTORS(NULL, NULL)
    {
       /* empty */
    }
+#undef DEFAULT_CONSTRUCTORS
 #endif
 };