[PATCH] D38216: [C++17] Fix class template argument deduction for default constructors without an initializer

[Richard Smith - zygoloid via Phabricator via cfe-commits]

rsmith accepted this revision.
rsmith added inline comments.
This revision is now accepted and ready to land.


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Comment at: test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.type.class.deduct/p1.cpp:17
 };
 extern A x; // expected-error {{requires an initializer}}
+static A y;
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The diagnostic we produce in this case is not very good. The problem is not that the declaration requires an initializer (how can a forward declaration like this require an initializer?), instead the problem is that type deduction is only possible for the initializing declaration of a variable.


https://reviews.llvm.org/D38216