[#BOO-223] Improve Operator Override (and General Comparison)

Boo

Improve Operator Override (and General Comparison)

Created: 14/Dec/04 12:58 AM Updated: 22/Mar/06 06:34 PM

Component/s:

Compiler

Affects Version/s:

None

Fix Version/s:

None

Time Tracking:

Not Specified

File Attachments:

operators.diff (297 kb)
2.

operators.zip (63 kb)

Issue Links:

dependent

This issue depends upon:

~~BOO-79~~ use implicit conversion operators

This issue is depended upon by:

BOO-438 C# and VB parser

Description

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improve the syntax for overriding, such that you can define:

def +:
pass

for both binary and unary operations, and also allow the definition of a general comparison function such that:

def <=>:
rvalue.Value <=> lvalue.Value

will allow any of the comparison operations to be performed.

All

Comments

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Scott Fleckenstein - 14/Dec/04 01:00 AM

operators.zip is a patch (and added files) to enable the above behavior. It seems to work pretty well, but whether it is ready for prime time is the community's decision.

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Scott Fleckenstein - 14/Dec/04 12:35 PM

Apparrently I am an idiot, since the one time i didn't check the patch it broke. Something happened with the #regions in some of the files. This patch should successfully apply.

Sorry everyone

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Arron Washington - 14/Dec/04 05:39 PM

I'm down with that - its a cleaner, easier to read syntax than having op_... everywhere, that's for sure.

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Doug H - 01/Mar/06 03:06 PM

See http://archive.boo.codehaus.org/user/threads/phhefeakaejiklimckpn

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Doug H - 21/Mar/06 07:04 PM

Approved syntax for operator overloading described at: http://groups.google.com/group/boolang/msg/6a00315e5939e28a?hl=en&

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Arron Washington - 21/Mar/06 07:22 PM

Does that mean we get the spaceship operator, too?

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Doug H - 22/Mar/06 06:34 PM

I don't see why not. It's a nice shortcut for "==", "!=", "<", ">", "<=", ">="
Even a lot of C# people want it:
http://blogs.msdn.com/abhinaba/archive/2005/10/11/479537.aspx
http://www.dotnetjunkies.com/WebLog/anoras/archive/2005/10/11/133164.aspx