Re: language design implications for variant records in a pascal-like language

Hans-Peter Diettrich <DrDiettrich1@aol.com>
Sat, 25 Dec 2010 16:19:02 +0100

          From comp.compilers
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From: Hans-Peter Diettrich <DrDiettrich1@aol.com>
Newsgroups: comp.compilers
Date: Sat, 25 Dec 2010 16:19:02 +0100
Organization: Compilers Central
References: 10-12-040
Keywords: storage, design
Posted-Date: 27 Dec 2010 10:59:24 EST

noitalmost schrieb:


> I'm trying to keep my language (and compiler) fairly small, is there a good
> case for variant records, or could everything be handled through classes
> without too much inconvenience to the user programmer?


Variant records can simplify memory management of polymorphic data,
eliminating additional class instances (=heap objects) when embedded in
other objects, and can reduce the number of new/additional objects
during type conversions. External libraries (databases, COM) can use
polymorphic records as arguments, so that such a feature may be a MUST
for using such APIs. Otherwise every programmer should be happy with
more type-safe polymorphic classes.


DoDi


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