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This adds the manipulators for use with basic_osyncstream. In order to detect when an arbitrary basic_ostream<C,T> is the base class of a basic_syncbuf<C,T,A> object, introduce a new intermediate base class that stores the data members. The new base class stores a pointer and two bools, which wastes (sizeof(void*) - 2) bytes of padding. It would be possible to use the two least significant bits of the pointer for the two bools, at least for targets where alignof(basic_streambuf) > 2, but that's left as a possible change for a future date. Also define basic_syncbuf::overflow to override the virtual function in the base class, so that single characters can be inserted into the stream buffer. Previously the default basic_streambuf::overflow implementation was used, which drops the character on the floor. libstdc++-v3/ChangeLog: * include/std/ostream (__syncbuf_base): New class template. (emit_on_flush, noemit_on_flush, flush_emit): New manipulators. * include/std/syncstream (basic_syncbuf): Derive from __syncbuf_base instead of basic_streambuf. (basic_syncbuf::operator=): Remove self-assignment check. (basic_syncbuf::swap): Remove self-swap check. (basic_syncbuf::emit): Do not skip pubsync() call if sequence is empty. (basic_syncbuf::sync): Remove no-op pubsync on stringbuf. (basic_syncbuf::overflow): Define override. * testsuite/27_io/basic_syncstream/basic_ops/1.cc: Test basic_osyncstream::put(char_type). * testsuite/27_io/basic_ostream/emit/1.cc: New test. |
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| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
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| include | ||
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| intl | ||
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| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
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| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
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| COPYING3.LIB | ||
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| depcomp | ||
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| ltsugar.m4 | ||
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| MAINTAINERS | ||
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