+ /// This returns the twine as a single StringRef. This method is only valid
+ /// if isSingleStringRef() is true.
+ StringRef getSingleStringRef() const {
+ assert(isSingleStringRef() &&"This cannot be had as a single stringref!");
+ switch (getLHSKind()) {
+ default: llvm_unreachable("Out of sync with isSingleStringRef");
+ case EmptyKind: return StringRef();
+ case CStringKind: return StringRef(LHS.cString);
+ case StdStringKind: return StringRef(*LHS.stdString);
+ case StringRefKind: return *LHS.stringRef;
+ case SmallStringKind:
+ return StringRef(LHS.smallString->data(), LHS.smallString->size());
+ }
+ }
+
+ /// This returns the twine as a single StringRef if it can be
+ /// represented as such. Otherwise the twine is written into the given
+ /// SmallVector and a StringRef to the SmallVector's data is returned.
+ StringRef toStringRef(SmallVectorImpl<char> &Out) const {
+ if (isSingleStringRef())
+ return getSingleStringRef();
+ toVector(Out);
+ return StringRef(Out.data(), Out.size());
+ }
+
+ /// This returns the twine as a single null terminated StringRef if it
+ /// can be represented as such. Otherwise the twine is written into the
+ /// given SmallVector and a StringRef to the SmallVector's data is returned.
+ ///
+ /// The returned StringRef's size does not include the null terminator.
+ StringRef toNullTerminatedStringRef(SmallVectorImpl<char> &Out) const;
+
+ /// Write the concatenated string represented by this twine to the
+ /// stream \p OS.