If we see UTF-8 BOM sequence at the beginning of a response file, we shall

[oota-llvm.git] / lib / Support / YAMLParser.cpp

diff --git a/lib/Support/YAMLParser.cpp b/lib/Support/YAMLParser.cpp
index 01cd926297a99f60944fda5e6019335d90c1bf36..b8b50dde5d68d3abb5c66029f7944bbcbf00ed8e 100644 (file)
--- a/lib/Support/YAMLParser.cpp
+++ b/lib/Support/YAMLParser.cpp
@@ -259,8 +259,8 @@ namespace yaml {
 /// @brief Scans YAML tokens from a MemoryBuffer.
 class Scanner {
 public:
-  Scanner(const StringRef Input, SourceMgr &SM);
-  Scanner(std::unique_ptr<MemoryBuffer> Buffer, SourceMgr &SM_);
+  Scanner(StringRef Input, SourceMgr &SM);
+  Scanner(MemoryBufferRef Buffer, SourceMgr &SM_);
 
   /// @brief Parse the next token and return it without popping it.
   Token &peekNext();
@@ -294,6 +294,8 @@ public:
   }
 
 private:
+  void init(MemoryBufferRef Buffer);
+
   StringRef currentInput() {
     return StringRef(Current, End - Current);
   }
@@ -469,7 +471,7 @@ private:
   SourceMgr &SM;
 
   /// @brief The original input.
-  MemoryBuffer *InputBuffer;
+  MemoryBufferRef InputBuffer;
 
   /// @brief The current position of the scanner.
   StringRef::iterator Current;
@@ -699,27 +701,28 @@ std::string yaml::escape(StringRef Input) {
   return EscapedInput;
 }
 
-Scanner::Scanner(StringRef Input, SourceMgr &sm)
-  : SM(sm)
-  , Indent(-1)
-  , Column(0)
-  , Line(0)
-  , FlowLevel(0)
-  , IsStartOfStream(true)
-  , IsSimpleKeyAllowed(true)
-  , Failed(false) {
-  InputBuffer = MemoryBuffer::getMemBuffer(Input, "YAML");
-  SM.AddNewSourceBuffer(InputBuffer, SMLoc());
-  Current = InputBuffer->getBufferStart();
-  End = InputBuffer->getBufferEnd();
+Scanner::Scanner(StringRef Input, SourceMgr &sm) : SM(sm) {
+  init(MemoryBufferRef(Input, "YAML"));
+}
+
+Scanner::Scanner(MemoryBufferRef Buffer, SourceMgr &SM_) : SM(SM_) {
+  init(Buffer);
 }
 
-Scanner::Scanner(std::unique_ptr<MemoryBuffer> Buffer, SourceMgr &SM_)
-    : SM(SM_), InputBuffer(Buffer.get()),
-      Current(InputBuffer->getBufferStart()), End(InputBuffer->getBufferEnd()),
-      Indent(-1), Column(0), Line(0), FlowLevel(0), IsStartOfStream(true),
-      IsSimpleKeyAllowed(true), Failed(false) {
-  SM.AddNewSourceBuffer(Buffer.release(), SMLoc());
+void Scanner::init(MemoryBufferRef Buffer) {
+  InputBuffer = Buffer;
+  Current = InputBuffer.getBufferStart();
+  End = InputBuffer.getBufferEnd();
+  Indent = -1;
+  Column = 0;
+  Line = 0;
+  FlowLevel = 0;
+  IsStartOfStream = true;
+  IsSimpleKeyAllowed = true;
+  Failed = false;
+  std::unique_ptr<MemoryBuffer> InputBufferOwner =
+      MemoryBuffer::getMemBuffer(Buffer);
+  SM.AddNewSourceBuffer(std::move(InputBufferOwner), SMLoc());
 }
 
 Token &Scanner::peekNext() {
@@ -1517,8 +1520,8 @@ bool Scanner::fetchMoreTokens() {
 Stream::Stream(StringRef Input, SourceMgr &SM)
     : scanner(new Scanner(Input, SM)), CurrentDoc() {}
 
-Stream::Stream(std::unique_ptr<MemoryBuffer> InputBuffer, SourceMgr &SM)
-    : scanner(new Scanner(std::move(InputBuffer), SM)), CurrentDoc() {}
+Stream::Stream(MemoryBufferRef InputBuffer, SourceMgr &SM)
+    : scanner(new Scanner(InputBuffer, SM)), CurrentDoc() {}
 
 Stream::~Stream() {}
 
@@ -1567,11 +1570,11 @@ std::string Node::getVerbatimTag() const {
     if (Raw.find_last_of('!') == 0) {
       Ret = Doc->getTagMap().find("!")->second;
       Ret += Raw.substr(1);
-      return std::move(Ret);
+      return Ret;
     } else if (Raw.startswith("!!")) {
       Ret = Doc->getTagMap().find("!!")->second;
       Ret += Raw.substr(2);
-      return std::move(Ret);
+      return Ret;
     } else {
       StringRef TagHandle = Raw.substr(0, Raw.find_last_of('!') + 1);
       std::map<StringRef, StringRef>::const_iterator It =
@@ -1585,7 +1588,7 @@ std::string Node::getVerbatimTag() const {
         setError(Twine("Unknown tag handle ") + TagHandle, T);
       }
       Ret += Raw.substr(Raw.find_last_of('!') + 1);
-      return std::move(Ret);
+      return Ret;
     }
   }