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From: Gene Bushuyev <gbush@my-deja.com>
Subject: Re: Discussion: type_info
Date: 1999/12/13
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In article <s55a88v5378@news.supernews.com>,
  "Andrei Alexandrescu" <andrewalex@hotmail.com> wrote:
>
> Dave Harris <scorp@btinternet.com> wrote in message
> news:memo.19991210152032.62499C@btinternet.com...
> [discussion about type_info::name]
>
> I think a reasonable set of requirements for type_info::name would be:
>
> * for a primitive type, type_info::name returns the name of that type.
> The position of const, presence of spaces etc. will be as follows:
> yadda, yadda, yadda.
> * for a class visible from the global namespace, type_info::name
> returns the name of the class, appropriately qualified. A prepending
> double colon will exist for all classes. For example, given:
>
> class A { ... };
> namespace N
> {
>     class B { class C; };
> }
>
> the names of the three classes will be: "::A", "::N::B", "::N::B::C".
>
[snip]
I think it's a good suggestion. Except, I would drop the leading "::"
because otherwise all the classes would have :: prepended to the name.
Also, for templates, it makes sense to return full qualified name of
instantiated class; and use the name as it appears in declaration of
template if it wasn't instantiated. E.g.
template<class T> class A{};
typeid(A<int>).name() returns "A<int>"
typeid(A).name() returns "template<class T> class A"
It isn't realy a problem if the names are very long. I guess all
compilers already have this functionality since when error occures you
can see the error messages with full names of templates, even when such
a name is 10K long. Actually, compiler doesn't have to store static
strings for instantiated templates names. It can include a piece of
code to produce such name on demand.
-------------------------------------
Gene Bushuyev


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