Is it valid to use a typedef name (type-id) in place of a class name in a
constructor initializer list?

 template <class T> class foo {};
 typedef foo<char> bar;
 class baz : public bar
 {
     baz() : bar() {}
 };

The dwp seems to say no:

          mem-initializer-id:
                  ::opt nested-name-specifieropt class-name
                  identifier
          class-name:
                  identifier
                  template-id
                  /* note: no type-id here */

But that seems like a silly restriction.
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In article <5gs6dj$i3s$1@erawan.cognex.com> Michael R Cook
<mcook@cognex.com> writes:
>Is it valid to use a typedef name (type-id) in place of a class name in a
>constructor initializer list?
>
> template <class T> class foo {};
> typedef foo<char> bar;
> class baz : public bar
> {
>     baz() : bar() {}
> };
>
>The dwp seems to say no:
>
>          mem-initializer-id:
>                  ::opt nested-name-specifieropt class-name
>                  identifier
>          class-name:
>                  identifier
>                  template-id
>                  /* note: no type-id here */
>
>But that seems like a silly restriction.

The syntactic construct "type-id" is not the same as a typedef-name.

A typedef-name that names a class is a class-name, so the answer to your
question is yes, a typedef name may appear as a class name in a constructor
initializer list.

--
John Spicer
Edison Design Group
jhs@edg.com
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Michael R Cook writes:

> Is it valid to use a typedef name (type-id) in place of a class name in a
> constructor initializer list?

Yes, it is.  Any name that denotes the base class can be used in the
mem-initializer list.  Read [class.base.init] paragraph 2.

--
Alexandre Oliva
mailto:oliva@dcc.unicamp.br mailto:aoliva@acm.org
Universidade Estadual de Campinas, SP, Brasil
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