Ada 95 Reference Manual
J.8 Mod Clauses
Syntax
mod_clause ::= at mod static_expression;
Static Semantics
A record_representation_clause of the form:
for r use
record at mod a
...
end record;
record at mod a
...
end record;
is equivalent to:
for r'Alignment use a;
for r use
record
...
end record;
for r use
record
...
end record;