Re: alias name of parameterized class

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2 total messages Started by Tomohira Tabata Thu, 14 Dec 1995 04:52

#2925

Author: Tomohira Tabata
Date: Thu, 14 Dec 1995 04:52

35 lines
1914 bytes

>>>>> On 14 Dec 1995 02:55:53 +0900, clamage@Eng.Sun.Com (Steve Clamage) said:

>> In article WAA24242@k4.k2.t.u-tokyo.ac.jp, TABATA Tomohira <loba@k2.t.u-tokyo.ac.jp> writes:
>> Is the following use of typedef allowed to make alias names of
>> a parameterized class?
>> 
>> template <class T> ParameterizedClass { /* ... */ };
>> typedef ParameterizedClass PC;

>> No, because "ParameterizedClass" is not the name of a type. (A template
>> is not a type.)

>> You can write, for example.
>> 	typedef ParameterizedClass<int> PCint;
>> because ParameterizedClass<int> is the name of a type.

I wonder we have no method of giving a template a different name. 
Typedef provides a new concept to a type, for example.
	typedef int size_t;
In the same manner I'd like to give a alias to a template. I know it
is possible using #define.
	#define MyContainer Vector
We need a method independent of the preprocessor for the purpose.
------
   Tomohira Tabata	loba@k2.t.u-tokyo.ac.jp
   Department of Mathematical Engineering and Information Physics,
   Faculty of Engineering, University of Tokyo, Japan
   TEL: +81-3-3812-2111 ext. 6902    FAX: +81-3-5800-6969




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Re: alias name of parameterized class

#2935

Author: Tero Pulkkinen
Date: Thu, 14 Dec 1995 20:17

30 lines
1639 bytes

In article <199512140426.NAA01763@k9.k2.t.u-tokyo.ac.jp> loba@k2.t.u-tokyo.ac.jp (Tomohira Tabata) writes:

   I wonder we have no method of giving a template a different name. 
   Typedef provides a new concept to a type, for example.
	   typedef int size_t;
   In the same manner I'd like to give a alias to a template. I know it
   is possible using #define.
	   #define MyContainer Vector
   We need a method independent of the preprocessor for the purpose.

Doesnt this work?

template <class T> typedef Vector<T> MyContainer;

Well, it didnt work with g++2.7.0. Though i dont know why wouldn't it work.
Reading the september working paper i didnt found anything, what would
forbid using it, and typedef is a simple-declaration and should be allowed
in template declaration, wouldnt it? [temp.2], [dcl.dcl.1], [dcl.spec.1]
So i guess its not yet implemented in g++ or i cant read the draft...

-- 
-- Tero Pulkkinen -- terop@kotka.cs.tut.fi --



---
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