Implementation and design aspects of the Scala system internals ()

Lukas Rytz | 2 Jun 2009 08:22

Re: names / defaults

Hi Anders,

In fact I did not commit a new starr togeter with the named/default arguments
(http://lampsvn.epfl.ch/trac/scala/changeset/17916).
But I did commit a new starr with the new annotations implementation
(http://lampsvn.epfl.ch/trac/scala/changeset/17925).

The reason is that (actually in both changes), the pickle format has changed.
The new starr was done to make sure it uses that new format. Also, we can
now start using named/default arguments in the compiler/library.

If you build a new starr just make sure you build it based on a recent
version of trunk.

Cheers: Lukas

On Mon, Jun 1, 2009 at 20:03, Anders Bach Nielsen <andersbach.nielsen-p8DiymsW2f8@public.gmane.org> wrote:

Hey Lukas

I have one question, I can see that you committed a new starr together
with the named/default args commit. What is in that new starr? Any
reason why it was made?
The reason I ask is because I am currently creating a new starr that
supports only the new early defs syntax, and that means to remove that
old syntax usage from trunk!

/Anders

Lukas Rytz wrote:
> Named and default arguments are now in trunk. The main changes are:
>
> - MethodType now takes (params: List[Symbol]) as argument, no more
> List[Type]
> - To create parameter symbols for a synthetic MethodType, use
> methodSymbol.newSyntheticValueParamss(argtypess)
>
> - the expression "foo(x = _)" was previously parsed as
> foo(x$1 => x = x$1)
> but is now parsed as a named application:
> x$1 => foo(x = x$1)
>
> - a "copy" method is added to case classes
> - the tree copiers in the compiler are now called "treeCopy", no longer
> "copy"
>
> To learn how to use named / default arguments and how they are implemented,
> see http://www.scala-lang.org/sid/1
>
>
> Cheers: Lukas

--
Anders Bach Nielsen | http://www.cs.au.dk/~abachn/
University of Aarhus | abachn-xFMzFlFZ0lk@public.gmane.org
-
Earth men are real men!

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Anders Bach Nielsen | 2 Jun 2009 08:43

Re: names / defaults

Hey Lukas

Sorry, I thought is was the named arguments commit, but yes, sorry it 
was the annotations commit :) But never the less, you committed a new 
starr :) Okay, I have just today merge the earlydefs branch with trunk 
and I am running the test suite to see if there are any failing test 
cases. If not, then I will build a new starr of this for my branch, 
where the early defs syntax has changed!

This starr will then contain the named arguments and the annotations 
commit.

/Anders

Lukas Rytz wrote:
> Hi Anders,
> 
> In fact I did not commit a new starr togeter with the named/default
> arguments
> (http://lampsvn.epfl.ch/trac/scala/changeset/17916).
> But I did commit a new starr with the new annotations implementation
> (http://lampsvn.epfl.ch/trac/scala/changeset/17925).
> 
> The reason is that (actually in both changes), the pickle format has
> changed.
> The new starr was done to make sure it uses that new format. Also, we can
> now start using named/default arguments in the compiler/library.
> 
> If you build a new starr just make sure you build it based on a recent
> version of trunk.
> 
> Cheers: Lukas
> 
--

-- 
Anders Bach Nielsen            |   http://www.cs.au.dk/~abachn/
University of Aarhus           |   abachn@...
- 
  Half of being smart is knowing what you're dumb at.