istreambuf_iterator increment should call sbumpc instead of snextc. Patch by Kimball Thurston. This fixes http://llvm.org/bugs/show_bug.cgi?id=14358. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@168209 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/iterator b/include/iterator index 0be7a8b..bc0ce47 100644 --- a/include/iterator +++ b/include/iterator
@@ -799,7 +799,7 @@ typedef basic_streambuf<_CharT,_Traits> streambuf_type; typedef basic_istream<_CharT,_Traits> istream_type; private: - streambuf_type* __sbuf_; + mutable streambuf_type* __sbuf_; class __proxy { @@ -813,13 +813,14 @@ }; _LIBCPP_INLINE_VISIBILITY - void __test_for_eof() + bool __test_for_eof() const { if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) __sbuf_ = 0; + return __sbuf_ == 0; } public: - _LIBCPP_INLINE_VISIBILITY istreambuf_iterator() _NOEXCEPT : __sbuf_(0) {} + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(0) {} _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT : __sbuf_(__s.rdbuf()) {__test_for_eof();} _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT @@ -832,19 +833,16 @@ _LIBCPP_INLINE_VISIBILITY char_type* operator->() const {return nullptr;} _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() { - if (traits_type::eq_int_type(__sbuf_->snextc(), traits_type::eof())) - __sbuf_ = 0; + __sbuf_->sbumpc(); return *this; } _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) { - char_type __c = __sbuf_->sgetc(); - ++(*this); - return __proxy(__c, __sbuf_); + return __proxy(__sbuf_->sbumpc(), __sbuf_); } _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const - {return (__sbuf_ == 0) == (__b.__sbuf_ == 0);} + {return __test_for_eof() == __b.__test_for_eof();} }; template <class _CharT, class _Traits> 