clang/test/Modules/lambda-context.cpp

   1 // RUN: %clang_cc1 -fmodules -std=c++11 -emit-pch -o %t %s
   2 // RUN: %clang_cc1 -fmodules -std=c++11 -include-pch %t %s -verify
   3 //
   4 // This test checks for a bug in the deserialization code that was only
   5 // reachable with modules enabled, but actually building and using modules is
   6 // not necessary in order to trigger it, so we just use PCH here to make the
   7 // test simpler.
   8
   9 #ifndef HEADER_INCLUDED
  10 #define HEADER_INCLUDED
  11
  12 struct X { template <typename T> X(T) {} };
  13 struct Y { Y(X x = [] {}); };
  14
  15 #else
  16
  17 // This triggers us to load the specialization of X::X for Y's lambda. That
  18 // lambda's context decl must not be loaded as a result of loading the lambda,
  19 // as that would hit a deserialization cycle.
  20 X x = [] {}; // expected-no-diagnostics
  21
  22 #endif