Add Twine ADT.

 - Not currently used.

llvm-svn: 76956

1 files changed, 91 insertions, 0 deletions

diff --git a/llvm/lib/Support/Twine.cpp b/llvm/lib/Support/Twine.cpp
new file mode 100644
index 00000000000..4c34d279e8f
--- /dev/null
+++ b/llvm/lib/Support/Twine.cpp
@@ -0,0 +1,91 @@
+//===-- Twine.cpp - Fast Temporary String Concatenation -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+std::string Twine::str() const {
+  std::string Res;
+  raw_string_ostream OS(Res);
+  print(OS);
+  return Res;
+}
+
+void Twine::toVector(SmallVectorImpl<char> &Out) const {
+  raw_svector_ostream OS(Out);
+  print(OS);
+}
+
+void Twine::printOneChild(raw_ostream &OS, const void *Ptr, 
+                          NodeKind Kind) const {
+  switch (Kind) {
+  case Twine::NullKind: break;
+  case Twine::EmptyKind: break;
+  case Twine::CStringKind: 
+    OS << static_cast<const char*>(Ptr); 
+    break;
+  case Twine::StdStringKind:
+    OS << *static_cast<const std::string*>(Ptr); 
+    break;
+  case Twine::StringRefKind:
+    OS << *static_cast<const StringRef*>(Ptr); 
+    break;
+  case Twine::TwineKind:
+    static_cast<const Twine*>(Ptr)->print(OS); 
+    break;
+  }
+}
+
+void Twine::printOneChildRepr(raw_ostream &OS, const void *Ptr, 
+                              NodeKind Kind) const {
+  switch (Kind) {
+  case Twine::NullKind:
+    OS << "null"; break;
+  case Twine::EmptyKind:
+    OS << "empty"; break;
+  case Twine::CStringKind:
+    OS << "cstring:\"" 
+       << static_cast<const char*>(Ptr) << "\""; 
+    break;
+  case Twine::StdStringKind:
+    OS << "std::string:\"" 
+       << *static_cast<const std::string*>(Ptr) << "\""; 
+    break;
+  case Twine::StringRefKind:
+    OS << "stringref:\"" 
+       << *static_cast<const StringRef*>(Ptr) << "\""; 
+    break;
+  case Twine::TwineKind:
+    OS << "rope:";
+    static_cast<const Twine*>(Ptr)->printRepr(OS);
+    break;
+  }
+}
+
+void Twine::print(raw_ostream &OS) const {
+  printOneChild(OS, LHS, getLHSKind());
+  printOneChild(OS, RHS, getRHSKind());
+}
+
+void Twine::printRepr(raw_ostream &OS) const {
+  OS << "(Twine ";
+  printOneChildRepr(OS, LHS, getLHSKind());
+  OS << " ";
+  printOneChildRepr(OS, RHS, getRHSKind());
+  OS << ")";
+}
+
+void Twine::dump() const {
+  print(llvm::errs());
+}
+
+void Twine::dumpRepr() const {
+  printRepr(llvm::errs());
+}