Add bug: position pragmas don't work in macros

1 files changed, 37 insertions, 0 deletions

diff --git a/bug/list b/bug/list
index b9d28ac..4c62aeb 100644
--- a/bug/list
+++ b/bug/list
@@ -48,3 +48,40 @@
   odb: error: unable to extract profile paths
 
   See email from <axel50397@gmail.com>/23-Oct-2014.
+
+- Position pragmas in macros don't work
+
+  #include <odb/core.hxx>
+
+  #define ODB_COUNT(obj, key)                            \
+          PRAGMA_DB(view object(obj))                    \
+          struct obj##_count                             \
+          {                                              \
+            PRAGMA_DB(column("count(" + obj::key + ")")) \
+            int count;                                   \
+          };
+
+  /*
+  #define ODB_COUNT(obj, key)                            \
+          struct obj##_count                             \
+          {                                              \
+            int count;                                   \
+          };                                             \
+          PRAGMA_DB(view(obj##_count) object(obj))       \
+          PRAGMA_DB(member(obj##_count::count)           \
+                    column("count(" + obj::key + ")"))   \
+  */
+
+  #pragma db object
+  struct test
+  {
+    #pragma db id
+    int id;
+  };
+
+  ODB_COUNT(test, id)
+
+  The reason it doesn't work is because we use the macro expansion
+  point as the location of the pragmas inside the macro. Fixing this
+  properly won't be simple. Perhaps simply document as a limitation
+  where we describe PRAGMA_DB.