Re: c++/9127: Misleading diagnostic for missing template<> introducing specialization

Re: c++/9127: Misleading diagnostic for missing template<> introducing specialization

[Giovanni Bajo]

The following reply was made to PR c++/9127; it has been noted by GNATS.

From: "Giovanni Bajo" <giovannibajo@libero.it>
To: <gcc-gnats@gcc.gnu.org>,
	<gcc-bugs@gcc.gnu.org>,
	<nobody@gcc.gnu.org>,
	<gcc-prs@gcc.gnu.org>,
	<schmid@snake.iap.physik.tu-darmstadt.de>
Cc:  
Subject: Re: c++/9127: Misleading diagnostic for missing template<> introducing specialization
Date: Fri, 2 May 2003 20:29:05 +0200

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9127
 
 Well, the problem is that the compiler is entering an instantiation
 recursion which should be terminated by the explicit specialization. Since
 the spiecialization is invalid (and skipped by the compiler), the loop never
 ends.
 
 The problem about the too long output is already covered by c++/9335. So, I
 keep this PR open only because the diagnostic of 3.4 could be improved:
 
 -----------------------------------
 template <int>
 struct A;
 
 struct A<0>
 {};
 -----------------------------------
 pr9127.cpp:5: error: too few template-parameter-lists
 
 The same code snippet on Comeau gives:
 
 "pr9127.cpp", line 4: error: specializing class "A<0>" without "template<>"
 syntax is nonstandard
 
 which is _far_ better.
 
 Giovanni Bajo