[PATCH] D16396: Warn if variable cannot be implicitly instantiated

[Serge Pavlov via cfe-commits]

sepavloff created this revision.
sepavloff added a reviewer: rsmith.
sepavloff added subscribers: cfe-commits, silvas.

Instantiation of static class members may be a source of user misunderstanding,
especially in the case of using modules, PR24425 describes one of such examples.
This patch implements warning if compiler tried to make implicit instantiation
but could not find template definition. The implementation follows discussion
of http://reviews.llvm.org/D12326.

http://reviews.llvm.org/D16396

Files:
  include/clang/Basic/DiagnosticGroups.td
  include/clang/Basic/DiagnosticSemaKinds.td
  include/clang/Sema/Sema.h
  lib/Sema/SemaTemplateInstantiateDecl.cpp
  test/CXX/temp/temp.decls/temp.mem/p1.cpp
  test/OpenMP/parallel_ast_print.cpp
  test/OpenMP/parallel_sections_ast_print.cpp
  test/OpenMP/task_ast_print.cpp
  test/OpenMP/teams_ast_print.cpp
  test/OpenMP/threadprivate_ast_print.cpp
  test/SemaCXX/PR10177.cpp
  test/SemaCXX/undefined-internal.cpp
  test/SemaTemplate/unavailable-var-template.cpp

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