- The messages involved in this example do use structures as payload,
- so we have to declare it to GRAS. Hopefully, this can be done easily by enclosing
- the structure declaration within a \ref GRAS_DEFINE_TYPE macro call. It will then copy this
- declaration into an hidden string variable, which can be automatically parsed at
- run time. Of course, the declaration is also copied unmodified by this macro, so that it
- gets parsed by the compiler also.
-
- There is some semantic that GRAS cannot guess alone and you need to <i>annotate</i>
- your declaration to add some. For example, the ctn pointer can be a reference to an
- object or a whole array (in which case you also has to specify its size). This is done
- with the GRAS_ANNOTE call. It is removed from the text passed to the compiler, but it helps
- GRAS getting some information about the semantic of your data. Here, it says that \a ctn is an
- array, which size is the result of the operation \a rows * \a cols (with \a rows and \a cols
- being the other fields of the structure).
-
- Please note that this annotation mechanism is not as robust and cool as this example seems to
- imply. If you want to use it yourself, you'd better use the exact right syntax, which is
- detailed in the \ref GRAS_dd section.
-
- \skip GRAS_DEFINE_TYPE
- \until matrix_t
