[LLVMbugs] [Bug 22919] New: [C++11] overload resolution is failed even though one is more specialized than another
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Mon Mar 16 05:36:19 PDT 2015
https://llvm.org/bugs/show_bug.cgi?id=22919
Bug ID: 22919
Summary: [C++11] overload resolution is failed even though one
is more specialized than another
Product: clang
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: unassignedclangbugs at nondot.org
Reporter: kariya_mitsuru at hotmail.com
CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
Classification: Unclassified
Created attachment 14058
--> https://llvm.org/bugs/attachment.cgi?id=14058&action=edit
clang++ -v
The sample code below should be compiled successfully but clang 3.7.0 rejects
it as ambiguous.
============= sample code =============
template<typename T>
void f(T&) {}
template<int = 0, typename T>
void f(const T&) {}
int main()
{
const int i = 0;
f(i);
}
============= sample code =============
cf. http://melpon.org/wandbox/permlink/bYvfmOgSpFN7VD8I
I think that the second one is more specialized.
Note that clang 3.6.0 accepts it.
cf. http://melpon.org/wandbox/permlink/YXMjSpOVkiFT6Hsn
Note also that clang 3.7.0 accepts it if the template parameters are swapped
like below.
============= sample code =============
template<typename T>
void f(T&) {}
template<typename T, int = 0>
void f(const T&) {}
int main()
{
const int i = 0;
f(i);
}
============= sample code =============
cf. http://melpon.org/wandbox/permlink/x3CyHr3PlwUmA1H3
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