Ping. On Tue, Apr 24, 2012 at 7:38 PM, Nico Weber <[email protected]> wrote: > Hi, > > if _HAS_EXCEPTIONS is set to 0, typeid() can't be used in clang on > windows. One use case where this happens is ICU in chromium: > http://git.chromium.org/gitweb/?p=chromium/deps/icu46.git;a=commitdiff_plain;h=8ad988882c0a6bb2ac66eecab662141110840e66 > > This is a reduced reproduction that builds fine with MSVC: > > #define _HAS_EXCEPTIONS 0 > #include <exception> > #include <typeinfo> // for typeid to work. > > void f() { > (void)typeid(int); // just typeid > } > > clang on the other hand complains about typeid requiring an include > for <typeinfo>. That's because clang tries to look up std::type_info, > and the MS typeinfo header apparently doesn't define type_info in the > std namespace, but only if _HAS_EXCEPTIONS is defined to 0. The > attached patch lets clang look up type_info in the global namespace in > ms compat mode if the lookup for std::type-info fails. > > Ok? > > Nico
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