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Diffstat (limited to 'libcommon/common.txx')
-rw-r--r-- | libcommon/common.txx | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/libcommon/common.txx b/libcommon/common.txx new file mode 100644 index 0000000..caa7481 --- /dev/null +++ b/libcommon/common.txx @@ -0,0 +1,24 @@ +// file : libcommon/common.txx +// license : GNU GPL v2; see accompanying LICENSE file + +// We have to use this helper function instead of just checking which +// database is used because the DATABASE_* macro may not be defined +// in a project that includes this header. +// +LIBCOMMON_SYMEXPORT bool +size_available (); + +template <typename T> +std::size_t +size (odb::result<T> r) +{ + if (size_available ()) + return r.size (); + else + { + std::size_t n (0); + for (typename odb::result<T>::iterator i (r.begin ()); i != r.end (); ++i) + n++; + return n; + } +} |