/// A raw_ostream that writes to an SmallVector or SmallString. This is a
/// simple adaptor class. This class does not encounter output errors.
+/// raw_svector_ostream operates without a buffer, delegating all memory
+/// management to the SmallString. Thus the SmallString is always up-to-date,
+/// may be used directly and there is no need to call flush().
class raw_svector_ostream : public raw_pwrite_stream {
SmallVectorImpl<char> &OS;
void pwrite_impl(const char *Ptr, size_t Size, uint64_t Offset) override;
- /// Return the current position within the stream, not counting the bytes
- /// currently in the buffer.
+ /// Return the current position within the stream.
uint64_t current_pos() const override;
-protected:
- // Like the regular constructor, but doesn't call init.
- explicit raw_svector_ostream(SmallVectorImpl<char> &O, unsigned);
- void init();
-
public:
/// Construct a new raw_svector_ostream.
///
/// \param O The vector to write to; this should generally have at least 128
/// bytes free to avoid any extraneous memory overhead.
- explicit raw_svector_ostream(SmallVectorImpl<char> &O);
- ~raw_svector_ostream() override;
+ explicit raw_svector_ostream(SmallVectorImpl<char> &O) : OS(O) {
+ SetUnbuffered();
+ }
+ ~raw_svector_ostream() override {}
- /// This is called when the SmallVector we're appending to is changed outside
- /// of the raw_svector_ostream's control. It is only safe to do this if the
- /// raw_svector_ostream has previously been flushed.
- void resync();
+ // FIXME: resync is no-op. Remove it and its users.
+ void resync() {}
- /// Flushes the stream contents to the target vector and return a StringRef
- /// for the vector contents.
- StringRef str();
+ /// Return a StringRef for the vector contents.
+ StringRef str() { return StringRef(OS.data(), OS.size()); }
};
/// A raw_ostream that discards all output.
SmallVector<char, 0> Buffer;
public:
- buffer_ostream(raw_ostream &OS) : raw_svector_ostream(Buffer, 0), OS(OS) {
- init();
- }
+ buffer_ostream(raw_ostream &OS) : raw_svector_ostream(Buffer), OS(OS) {}
~buffer_ostream() { OS << str(); }
};