70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -Wheader-hygiene -verify %s
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#ifdef BE_THE_HEADER
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namespace warn_in_header_in_global_context {}
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using namespace warn_in_header_in_global_context; // expected-warning {{using namespace directive in global context in header}}
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// While we want to error on the previous using directive, we don't when we are
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// inside a namespace
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namespace dont_warn_here {
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using namespace warn_in_header_in_global_context;
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}
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// We should warn in toplevel extern contexts.
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namespace warn_inside_linkage {}
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extern "C++" {
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using namespace warn_inside_linkage; // expected-warning {{using namespace directive in global context in header}}
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}
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// This is really silly, but we should warn on it:
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extern "C++" {
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extern "C" {
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extern "C++" {
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using namespace warn_inside_linkage; // expected-warning {{using namespace directive in global context in header}}
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}
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}
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}
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// But we shouldn't warn in extern contexts inside namespaces.
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namespace dont_warn_here {
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extern "C++" {
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using namespace warn_in_header_in_global_context;
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}
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}
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// We also shouldn't warn in case of functions.
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inline void foo() {
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using namespace warn_in_header_in_global_context;
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}
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namespace macronamespace {}
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#define USING_MACRO using namespace macronamespace;
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// |using namespace| through a macro should warn if the instantiation is in a
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// header.
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USING_MACRO // expected-warning {{using namespace directive in global context in header}}
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#else
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#define BE_THE_HEADER
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#include __FILE__
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namespace dont_warn {}
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using namespace dont_warn;
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// |using namespace| through a macro shouldn't warn if the instantiation is in a
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// cc file.
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USING_MACRO
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// Check behavior of line markers.
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namespace warn_header_with_line_marker {}
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# 1 "XXX.h" 1
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using namespace warn_header_with_line_marker; // expected-warning {{using namespace directive in global context in header}}
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# 70 "warn-using-namespace-in-header.cpp" 2
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namespace nowarn_after_line_marker {}
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using namespace nowarn_after_line_marker;
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#endif
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