llvm-project/clang/test/Parser/cxx-condition.cpp

// RUN: clang-cc -parse-noop -verify %s

void f() {
  int a;
  while (a) ;
  while (int x) ; // expected-error {{expected '=' after declarator}}
  while (float x = 0) ;
  if (const int x = a) ;
  switch (int x = a+10) {}
  for (; int x = ++a; ) ;
}