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Eric Fiselier f2f3637d40 Fix PR27374 - Remove the implicit reduced-arity-extension in tuple. This patch removes libc++'s tuple extension which allowed it to be constructed from fewer initializers than elements; with the remaining elements being default constructed. However the implicit version of this extension breaks conforming code. For example: int fun(std::string); int fun(std::tuple<std::string, int>); int x = fun("hello"); // ambigious Because existing code may already depend on this extension it can be re-enabled by defining _LIBCPP_ENABLE_TUPLE_IMPLICIT_REDUCED_ARITY_EXTENSION. Note that the explicit version of this extension is still supported, although it's somewhat less useful than the implicit one. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@289158 91177308-0d34-0410-b5e6-96231b3b80d8	9 years ago
..
disable_reduced_arity_initialization_extension.pass.cpp	Fix PR27374 - Remove the implicit reduced-arity-extension in tuple.	9 years ago
enable_reduced_arity_initialization_extension.pass.cpp	Fix PR27374 - Remove the implicit reduced-arity-extension in tuple.	9 years ago

Eric Fiselier f2f3637d40 Fix PR27374 - Remove the implicit reduced-arity-extension in tuple.

This patch removes libc++'s tuple extension which allowed it to be
constructed from fewer initializers than elements; with the remaining
elements being default constructed. However the implicit version of
this extension breaks conforming code. For example:

    int fun(std::string);
    int fun(std::tuple<std::string, int>);
    int x = fun("hello"); // ambigious

Because existing code may already depend on this extension it can be re-enabled
by defining _LIBCPP_ENABLE_TUPLE_IMPLICIT_REDUCED_ARITY_EXTENSION.

Note that the explicit version of this extension is still supported,
although it's somewhat less useful than the implicit one.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@289158 91177308-0d34-0410-b5e6-96231b3b80d8

disable_reduced_arity_initialization_extension.pass.cpp

Fix PR27374 - Remove the implicit reduced-arity-extension in tuple.

enable_reduced_arity_initialization_extension.pass.cpp

Fix PR27374 - Remove the implicit reduced-arity-extension in tuple.