Re: Elaboration Order

[Robert Dewar <robert_dewar@my-deja.com>]

By the way, another important guideline in coding practice is
that if you call a function in elaboration code, or instantiate
a package in elaboration code, then you should have a
pragma Elaborate_All for the corresponding unit.

The use of pragma Elaborate is almost always wrong in new
Ada 95 code, though it may be hard to eliminate body
dependencies from legacy code (see GNAT users guide for
a long discussion of this point).

Another issue has to do with tasks. It is generally risky to
have library tasks starting at elaboration time, since it
means that you have arbitrary code running before the main
package elaboration is complete. If you create such tasks,
you must very carefully review them to make sure that they
do not cause elaboration problems.


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