Update website to mention that you still need -frelaxed-template-template-args to enable the corresponding C++17 feature in Clang 5.


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that element's type is (or is derived from) a specialization of the deduced
template, skip the std::initializer_list special case.


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This would be trivial, except that our in-memory and serialized representations
for FieldDecls assumed that this can't happen.


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Patch by Blitz Rakete!


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This patch, by hamzasood, implements P0409R2, and allows [=, this] pre-C++2a as an extension (with appropriate warnings) for consistency.

https://reviews.llvm.org/D36572

Thanks Hamza!





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[cxx_status] Update link to Modules TS to latest working draft. Fix Coroutines TS flag to work if copy-pasted.


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Reviewers: GorNishanov

Reviewed By: GorNishanov

Subscribers: EricWF, rsmith, cfe-commits

Differential Revision: https://reviews.llvm.org/D33632

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Reviewers: GorNishanov

Reviewed By: GorNishanov

Subscribers: EricWF, rsmith, cfe-commits

Differential Revision: https://reviews.llvm.org/D33632

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Summary: It is time!

Reviewers: GorNishanov, rsmith

Reviewed By: GorNishanov, rsmith

Subscribers: EricWF, rsmith, cfe-commits

Differential Revision: https://reviews.llvm.org/D33624

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Unsure if there's a better document, but what we had before led to a
404. :)


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them via feature test macro __cpp_constexpr.

Thanks to Faisal for implementing this feature!


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[c++1z] Diagnose non-deducible template parameters in deduction guide templates, per [temp.param]p11.


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feature-test macro, and mark feature as done on status page.


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 * Update version number in DR tests from 4.0 to 4
 * Teach make_cxx_dr_status script about version numbers that don't contain a
   period.
 * Update cxx_status.html and cxx_dr_status.html to list Clang 4 features as
   "Clang 4" rather than "SVN"

Clang 4 features are still listed in yellow rather than green until release.


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to be specified for a template template parameter whenever the parameter is at
least as specialized as the argument (when there's an obvious and correct
mapping from uses of the parameter to uses of the argument). For example, a
template with more parameters can be passed to a template template parameter
with fewer, if those trailing parameters have default arguments.

This is disabled by default, despite being a DR resolution, as it's fairly
broken in its current state: there are no partial ordering rules to cope with
template template parameters that have different parameter lists, meaning that
code that attempts to decompose template-ids based on arity can hit unavoidable
ambiguity issues.

The diagnostics produced on a non-matching argument are also pretty bad right
now, but I aim to improve them in a subsequent commit.


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We continue to support dynamic exception specifications in C++1z as an
extension, but produce an error-by-default warning when we encounter one. This
allows users to opt back into the feature with a warning flag, and implicitly
opts system headers back into the feature should they happen to use it.

There is one semantic change implied by P0003R5 but not implemented here:
violating a throw() exception specification should now call std::terminate
directly instead of calling std::unexpected(), but since P0003R5 also removes
std::unexpected() and std::set_unexpected, and the default unexpected handler
calls std::terminate(), a conforming C++1z program cannot tell that we are
still calling it. The upside of this strategy is perfect backwards
compatibility; the downside is that we don't get the more efficient 'noexcept'
codegen for 'throw()'.


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When an object of class type is initialized from a prvalue of the same type
(ignoring cv qualifications), use the prvalue to initialize the object directly
instead of inserting a redundant elidable call to a copy constructor.


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P0012R1: add Itanium ABI support for throwing non-noexcept function pointers and catching as noexcept.


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on cxx-abi-dev (thread starting 2016-10-11). This is currently hidden behind a
cc1-only -m flag, pending discussion of how best to deal with language changes
that require use of new symbols from the ABI library.


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