static void vvalue_strbuf_append_r8(wmem_strbuf_t *strbuf, void *ptr)
{
	double r8 = *(double*)ptr;
	wmem_strbuf_append_printf(strbuf, "%g", r8);
}
static void vvalue_strbuf_append_r8(wmem_strbuf_t *strbuf, void *ptr)
{
	double r8 = *(double*)ptr;
	wmem_strbuf_append_printf(strbuf, "%g", r8);
}