Board index » delphi » Re: Delphi 7/8 Language enhancements

2003-12-04 01:49:55 AM
delphi77
Craig Stuntz [TeamB] writes:
Partition I Architecture.pdf:
10.3 Operator Overloading
10.3.1 Unary operators
10.3.2 Binary operators
10.3.3 Conversion operators
Pages 62ff of that document contain all the names. But it also says, on
page 62:
"CLS (framework): Shall not publicly expose overloading except as
specified here. Frameworks authors
should bear in mind that many programming languages, including
Object-Oriented languages, do not support
overloading and will expose overloaded methods or properties through
mangled names. Most languages
support neither operator overloading nor overloading based on return
type, so op_Implicit and op_Explicit
shall always be augmented with some alternative way to gain the same
functionality. "
I think that could be a more valid reason for the CLS not using them.
But I think I have seen some instances of operator overloading in the CLS
on *classes*. Just do a Member Search (F4) on "op_" in Lutz Roeder's
Reflector, and you will find them on numeric classes, on String, Cursor,
Version, XmlQualifiedName etc.
--
Rudy Velthuis (TeamB)
"This isn't right, this isn't even wrong."
-- Wolfgang Pauli (1900-1958), upon reading a young physicist's paper
 

Rudy Velthuis (TeamB) writes:
you must comply with if you want to support *all* .NET languages. But
.NET itself is capable of more, and the CLI is bigger in scope than the
CLS. If you are concerned about things that all languages might not
allow, however, you look to the CLI.
-Craig
--
Craig Stuntz [TeamB] ?Vertex Systems Corp. ?Columbus, OH
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Craig Stuntz [TeamB] writes:
--
Rudy Velthuis (TeamB)
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Rudy Velthuis (TeamB) writes:
isn't in CLS.
-Craig
--
Craig Stuntz [TeamB] ?Vertex Systems Corp. ?Columbus, OH
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Craig Stuntz [TeamB] writes:
follow the CLI.
--
Rudy Velthuis (TeamB)
"The opposite of a correct statement is a false statement. The opposite
of a profound truth may well be another profound truth."
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Rudy Velthuis (TeamB) writes:
that VB.NET supports operator overloading. AFAIK you can claim to
"follow" the CLI without implementing every bit of it, and if you have
all of CLS you can claim to be a full .NET language even if you can't
do everything that Delphi for .NET can do. For example, C# can not do
unmanaged exports, but it is still considered a full .NET language.
-Craig
--
Craig Stuntz [TeamB] ?Vertex Systems Corp. ?Columbus, OH
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Craig Stuntz [TeamB] writes:
.NET preview did. That is one of the options in the CLI, so it is
CLI-compliant.
--
Rudy Velthuis (TeamB)
"Whether you think that you can, or that you can't, you are usually
right."
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Nick Hodges (TeamB) writes:
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Rudy Velthuis (TeamB) writes:
to overload operators on classes.
-Craig
--
Craig Stuntz [TeamB] ?Vertex Systems Corp. ?Columbus, OH
Delphi/InterBase Weblog : delphi.weblogs.com
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On 3 Dec 2003 12:51:43 -0700, "Rudy Velthuis (TeamB)"
<XXXX@XXXXX.COM>writes:
Nick Hodges - TeamB
Lemanix Corporation
Please always follow the newsgroup guidelines --
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On 3 Dec 2003 13:40:24 -0700, "Rudy Velthuis (TeamB)"
<XXXX@XXXXX.COM>writes:
Craig mentioned one --
Nick Hodges - TeamB
Lemanix Corporation
Please always follow the newsgroup guidelines --
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Rudy Velthuis (TeamB) wrote on 3 Dec 2003 13:40:24 -0700 ...
<XXXX@XXXXX.COM>
+ Export DLL entry points
+ Use default parameters
+ Module level functions and fields
+ Non-default indexers
+ Access boxed value types without unboxing them
Marc Rohloff
marc rohloff at bigfoot dot com
 

"Rudy Velthuis (TeamB)" <XXXX@XXXXX.COM>writes:
but I don't know of any languages other than Delphi that support
them.
-Rich
 

On Wed, 3 Dec 2003 17:04:56 -0500, Marc Rohloff <XXXX@XXXXX.COM>
writes:
Delphi language features that C# doesn't have!
Nick Hodges - TeamB
Lemanix Corporation
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Rich Walker wrote on Wed, 03 Dec 2003 16:11:28 -0600 ...
<XXXX@XXXXX.COM>
enforce an enum to be limited to a specified value, that the CLI doesn't
support enum's only sets!
There is an attribute (FlagsAttribute) that informs anyone who cares
that the enum is intended as a bitmap/set. The CLI doesn't care about
this and the only place that I know of where it is checked is in an
enum's ToString method.
Marc
marc rohloff at bigfoot dot com