http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52460
Bug #: 52460
Summary: Misleading error message with templated c++ code
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c++
AssignedTo: [email protected]
ReportedBy: [email protected]
compiling the following:
---8<---8<---8<---8<---
template<typename T>
struct Base
{
typename T::Type var;
};
template<typename U>
struct Derived : Base<Derived<U> >
{
typedef U Type;
};
void foo()
{
Derived<int> i;
}
---8<---8<---8<---8<---
gives the error
gcctempl.cpp: In instantiation of ‘struct Base<Derived<int> >’:
gcctempl.cpp:7:8: required from ‘struct Derived<int>’
gcctempl.cpp:13:15: required from here
gcctempl.cpp:4:19: error: no type named ‘Type’ in ‘struct Derived<int>’
on all tested gcc versions (4.4, 4.5, 4.6, 4.7).
There is definitely a type called 'Type' in struct 'Derived', hence the error
message is misleading.
I'm not sure, the above code is probably ill-formed, because it creates a
circular dependence between the two types, but then, this should be
communicated to the user.
