http://llvm.org/bugs/show_bug.cgi?id=10217
Summary: Confusing error message with deleted implicit copy
constructors/assignment operators
Product: clang
Version: trunk
Platform: Macintosh
OS/Version: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: C++0x
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Consider the following code (adapted from libc++):
template <class _T1, class _T2>
struct __compressed_pair
{
__compressed_pair() {}
__compressed_pair(__compressed_pair&&) {}
};
typedef __compressed_pair<int, int> P;
P foo();
int main(int, char**)
{
P s;
s = foo();
}
Compiling this with clang r133996 results in:
$ clang -std=c++0x clang.cpp
clang.cpp:15:4: error: overload resolution selected deleted operator '='
s = foo();
~ ^ ~~~~~
clang.cpp:2:8: note: candidate function (the implicit copy assignment operator)
has been explicitly
deleted
struct __compressed_pair
^
1 error generated.
This behaviour is correct as per 12.8p18, however the error message is quite
confusing: How can an *implicit* operator be *explicitely* deleted? I think the
note should end with "... by the explicit move {constructor|assignment
operator}". Also, it should point to this move constructor/operator instead of
to the beginning of the class definition.
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