Re: Still no typedef

From:
Daniel Pitts <newsgroup.spamfilter@virtualinfinity.net>
Newsgroups:
comp.lang.java.programmer
Date:
Wed, 05 Dec 2007 13:50:42 -0800
Message-ID:
<-O6dnXBYF_XegMranZ2dnUVZ_hKdnZ2d@wavecable.com>
Arnauld.Loyer@gmail.com wrote:

I don't think it's a debate for the best language, just that declaring
some variable using generics can be quite long.

Map<String, Container<Entity, Comparator<Entity>>> myVariable=...
Iterator<Container<Entity, Comparator<Entity>>> iterator =
myVariable.values().iterator();

suppose the definition of Entity contains also some generics :
Entity becomes Entity<Node, RendererType>

the declaration of the Iterator becomes :

Iterator<Container<Entity<Node, RendererType>, Comparator<Entity<Node,
RendererType>>>>
iterator = ...

which becomes quite long :(

using a kinf of type def :

typedef Entity<Node, RendererType> nodeEntity;
typedef Container<nodeEntity, Comparator<nodeEntity>> containerEntity;

the iterator becomes :
Iterator<containerEntity> iterator = ...
shorter and more readable

Arnauld

There is talk of using type inference to help reduce the verbosity of
generics.

--
Daniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/>

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