https://llvm.org/bugs/show_bug.cgi?id=29312
Bug ID: 29312
Summary: Incorrect handling of ambiguous typed
std::get(std::tuple)
Product: clang
Version: 3.8
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++14
Assignee: unassignedclangb...@nondot.org
Reporter: jakub.gar...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Program using typed std::get is required to be ill-formed when retrieved type
occurs more than once inside a tuple:
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3584.html
Instead following code compiles successfully in clang++ 3.8.0 choosing the
first matching type:
#include <iostream>
#include <tuple>
int main()
{
std::tuple<int, int> tup{59, 56};
std::cout << std::get<int>(tup) << std::endl;
return 0;
}
std::pair exhibits proper behavior and doesn't compile with ambiguous std::get.
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