1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69
|
// RUN: %clang_cc1 -fsyntax-only -Wheader-hygiene -verify %s
#ifdef BE_THE_HEADER
namespace warn_in_header_in_global_context {}
using namespace warn_in_header_in_global_context; // expected-warning {{using namespace directive in global context in header}}
// While we want to error on the previous using directive, we don't when we are
// inside a namespace
namespace dont_warn_here {
using namespace warn_in_header_in_global_context;
}
// We should warn in toplevel extern contexts.
namespace warn_inside_linkage {}
extern "C++" {
using namespace warn_inside_linkage; // expected-warning {{using namespace directive in global context in header}}
}
// This is really silly, but we should warn on it:
extern "C++" {
extern "C" {
extern "C++" {
using namespace warn_inside_linkage; // expected-warning {{using namespace directive in global context in header}}
}
}
}
// But we shouldn't warn in extern contexts inside namespaces.
namespace dont_warn_here {
extern "C++" {
using namespace warn_in_header_in_global_context;
}
}
// We also shouldn't warn in case of functions.
inline void foo() {
using namespace warn_in_header_in_global_context;
}
namespace macronamespace {}
#define USING_MACRO using namespace macronamespace;
// |using namespace| through a macro should warn if the instantiation is in a
// header.
USING_MACRO // expected-warning {{using namespace directive in global context in header}}
#else
#define BE_THE_HEADER
#include __FILE__
namespace dont_warn {}
using namespace dont_warn;
// |using namespace| through a macro shouldn't warn if the instantiation is in a
// cc file.
USING_MACRO
// Check behavior of line markers.
namespace warn_header_with_line_marker {}
# 1 "XXX.h" 1
using namespace warn_header_with_line_marker; // expected-warning {{using namespace directive in global context in header}}
# 70 "warn-using-namespace-in-header.cpp" 2
namespace nowarn_after_line_marker {}
using namespace nowarn_after_line_marker;
#endif
|