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* c++/10449: Totally bogus error message on missing typename (GCC 3.4)
@ 2003-04-22 1:16 giovannibajo
0 siblings, 0 replies; only message in thread
From: giovannibajo @ 2003-04-22 1:16 UTC (permalink / raw)
To: gcc-gnats
>Number: 10449
>Category: c++
>Synopsis: Totally bogus error message on missing typename (GCC 3.4)
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: change-request
>Submitter-Id: net
>Arrival-Date: Tue Apr 22 01:16:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator: Giovanni Bajo
>Release: g++-3.4 (GCC) 3.4 20030413 (experimental)
>Organization:
>Environment:
cygwin
>Description:
The following legal code gives a totally bogus error message on mainline:
------------------------------
struct Foo
{};
template <typename T>
struct Identity
{
typedef T type;
};
struct Bar
{
template <typename T>
typename Identity<T>::type
func(T t)
{
return Identity<T>::type(t);
}
};
int main()
{
Bar b;
b.func(Foo());
}
------------------------------
gcc34bug1.cpp: In member function `typename Identity<T>::type Bar::func(T) [with T = Foo]':
gcc34bug1.cpp:24: instantiated from here
gcc34bug1.cpp:16: error: no match for call to `(Foo) (Foo&)'
The problem in the above code is that line 16 is missing the typename keyword.
This is obviously not reproducible on 3.3 or previous due to the implicit typename extensions.
>How-To-Repeat:
Compile the above file on 3.4
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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2003-04-22 1:16 c++/10449: Totally bogus error message on missing typename (GCC 3.4) giovannibajo
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