http://llvm.org/bugs/show_bug.cgi?id=10405
Summary: Missing actual type in error message when using
decltype as a template parameter
Product: clang
Version: trunk
Platform: Macintosh
OS/Version: MacOS X
Status: NEW
Keywords: quality-of-implementation
Severity: normal
Priority: P
Component: C++0x
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
The following program intentionally does not compile:
template <typename>
struct Foo { };
template <typename T, typename U>
auto foo(T t, U u) -> Foo<decltype(t + u)>;
int main(int, char**)
{
int i = foo(1, 2);
}
With clang r135379, this results in the following message:
$ clang -std=c++0x clang.cpp
clang.cpp:9:6: error: no viable conversion from 'Foo<decltype(t + u)>' to 'int'
int i = foo(1, 2);
^ ~~~~~~~~~
1 error generated.
It would be helpful, if clang displayed the actual type here, just as it does
with template parameters in many other situations. In this case, the message
should read:
no viable conversion from 'Foo<decltype(t + u)>' (aka 'Foo<int>') to 'int'
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