What is standard, and what isn't?
Wed, 30 Apr 1997 00:41:52 +0200 (MET DST)
Hello,
perhaps somebody can help to clarify the following two questions:
1) Is the comparision with `=' or `<>' of structured variables okay in
ISO Pascal? ISO 10206 6.8.3.5 only says that the types to be compared
must be compatible.
If not, this might be a reasonable extension (already offered by
some compilers, *not* including Borland Pascal;).
2) In GPC strings, the schema discriminant "Capacity" is accessible
as a "record field" of the string. Is this okay by ISO 10206,
and should it be done for other schemata this way, too? And how to
tread the "length" field of a string? ISO 10206 6.4.3.3 does not
say anything about that. I could imagine the string schema type to
be something similar to
Type
String ( Capacity: Integer ) = record
length: Integer;
String: packed array [ 1..Capacity ] of Char;
end (* String *);
except that the "String" field is automatically dereferenced.
Thanks for your help,
Peter
Dipl.-Phys. Peter Gerwinski, Essen, Germany, free physicist and programmer
peter.gerwinski@uni-essen.de - http://home.pages.de/~peter.gerwinski/ [970201]
maintainer GNU Pascal [970420] - http://home.pages.de/~gnu-pascal/ [970125]
Peter Gerwinski (peter@agnes.dida.physik.uni-essen.de)
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