Adriaan van Os wrote:
I have never could understand when this is allowed
A1:=A2;
Why this is not allowed
If A1=A2 then
in most Pascal compilers.
Because you can't simply compare the memory ranges occupied by records A
and B. They could have different pad bytes (and bits) but still be the
same.
Isn't the number of pad bytes a property of a type ? So when two vars
are of the same type, they also have the same number of pad bytes ?
Or: the compiler could also do the equivalent of sizeof(a1)=sizeof(a2),
if equal then can compare "easy" (same number of pad bytes), otherwise
give appropriate error (size of type differs, or so).
Micha
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