Re: c++/10864: [diagnostic] Unreadable error message for "no match for 'A < B' operator" if A,B are templates

["Giovanni Bajo" <giovannibajo@libero.it>]

The following reply was made to PR c++/10864; it has been noted by GNATS.

From: "Giovanni Bajo" <giovannibajo@libero.it>
To: <gcc-prs@gcc.gnu.org>,
	<gdr@gcc.gnu.org>,
	<gcc-bugs@gcc.gnu.org>,
	<gcc-gnats@gcc.gnu.org>,
	<bangerth@dealii.org>
Cc:  
Subject: Re: c++/10864: [diagnostic] Unreadable error message for "no match for 'A < B' operator" if A,B are templates
Date: Tue, 20 May 2003 05:06:51 +0200

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10864
 
 For reference:
 
 GCC with StlFilt:
 pr10864.cpp: In member function
    `bool less<X<vector<string>, vector<string> > >::foo()':
 pr10864.cpp:10:   instantiated from here
 pr10864.cpp:5: error: no match for
    `X<vector<string>, vector<string> > < X<vector<string>, vector<string> >'
     operator
 
 
 Comeau:
 "pr10864.cpp", line 5: error: no operator "<" matches these operands
             operand types are: X<std::vector<std::string,
                       std::allocator<std::string>>, std::vector<std::string,
                       std::allocator<std::string>>> <
                       X<std::vector<std::string,
 std::allocator<std::string>>,
                       std::vector<std::string, std::allocator<std::string>>>
         bool foo () { return T() < T(); }
                                  ^
 
           detected during instantiation of "bool less<T>::foo() [with
                     T=X<std::vector<std::string,
 std::allocator<std::string>>,
                     std::vector<std::string, std::allocator<std::string>>>]"
                     at line 10
 
 
 Comeau with StlFilt (yes, it screws indentation a little):
 pr10864.cpp(5): error: no operator "<" matches these operands
     operand types are: X<vector<string>, vector<string>> < X<vector<string>,
   vector<string>>
         bool foo () { return T() < T(); }
                                  ^
           detected during instantiation of "bool less<X<vector<string>,
    vector<string>>>::foo()" at line 10
 
 
 Giovanni Bajo