Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/Support/SourceMgr.h b/linux-x64/clang/include/llvm/Support/SourceMgr.h
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+//===- SourceMgr.h - Manager for Source Buffers & Diagnostics ---*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the SMDiagnostic and SourceMgr classes. This
+// provides a simple substrate for diagnostics, #include handling, and other low
+// level things for simple parsers.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_SOURCEMGR_H
+#define LLVM_SUPPORT_SOURCEMGR_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/None.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SMLoc.h"
+#include <algorithm>
+#include <cassert>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+namespace llvm {
+
+class raw_ostream;
+class SMDiagnostic;
+class SMFixIt;
+
+/// This owns the files read by a parser, handles include stacks,
+/// and handles diagnostic wrangling.
+class SourceMgr {
+public:
+ enum DiagKind {
+ DK_Error,
+ DK_Warning,
+ DK_Remark,
+ DK_Note,
+ };
+
+ /// Clients that want to handle their own diagnostics in a custom way can
+ /// register a function pointer+context as a diagnostic handler.
+ /// It gets called each time PrintMessage is invoked.
+ using DiagHandlerTy = void (*)(const SMDiagnostic &, void *Context);
+
+private:
+ struct SrcBuffer {
+ /// The memory buffer for the file.
+ std::unique_ptr<MemoryBuffer> Buffer;
+
+ /// This is the location of the parent include, or null if at the top level.
+ SMLoc IncludeLoc;
+ };
+
+ /// This is all of the buffers that we are reading from.
+ std::vector<SrcBuffer> Buffers;
+
+ // This is the list of directories we should search for include files in.
+ std::vector<std::string> IncludeDirectories;
+
+ /// This is a cache for line number queries, its implementation is really
+ /// private to SourceMgr.cpp.
+ mutable void *LineNoCache = nullptr;
+
+ DiagHandlerTy DiagHandler = nullptr;
+ void *DiagContext = nullptr;
+
+ bool isValidBufferID(unsigned i) const { return i && i <= Buffers.size(); }
+
+public:
+ SourceMgr() = default;
+ SourceMgr(const SourceMgr &) = delete;
+ SourceMgr &operator=(const SourceMgr &) = delete;
+ ~SourceMgr();
+
+ void setIncludeDirs(const std::vector<std::string> &Dirs) {
+ IncludeDirectories = Dirs;
+ }
+
+ /// Specify a diagnostic handler to be invoked every time PrintMessage is
+ /// called. \p Ctx is passed into the handler when it is invoked.
+ void setDiagHandler(DiagHandlerTy DH, void *Ctx = nullptr) {
+ DiagHandler = DH;
+ DiagContext = Ctx;
+ }
+
+ DiagHandlerTy getDiagHandler() const { return DiagHandler; }
+ void *getDiagContext() const { return DiagContext; }
+
+ const SrcBuffer &getBufferInfo(unsigned i) const {
+ assert(isValidBufferID(i));
+ return Buffers[i - 1];
+ }
+
+ const MemoryBuffer *getMemoryBuffer(unsigned i) const {
+ assert(isValidBufferID(i));
+ return Buffers[i - 1].Buffer.get();
+ }
+
+ unsigned getNumBuffers() const {
+ return Buffers.size();
+ }
+
+ unsigned getMainFileID() const {
+ assert(getNumBuffers());
+ return 1;
+ }
+
+ SMLoc getParentIncludeLoc(unsigned i) const {
+ assert(isValidBufferID(i));
+ return Buffers[i - 1].IncludeLoc;
+ }
+
+ /// Add a new source buffer to this source manager. This takes ownership of
+ /// the memory buffer.
+ unsigned AddNewSourceBuffer(std::unique_ptr<MemoryBuffer> F,
+ SMLoc IncludeLoc) {
+ SrcBuffer NB;
+ NB.Buffer = std::move(F);
+ NB.IncludeLoc = IncludeLoc;
+ Buffers.push_back(std::move(NB));
+ return Buffers.size();
+ }
+
+ /// Search for a file with the specified name in the current directory or in
+ /// one of the IncludeDirs.
+ ///
+ /// If no file is found, this returns 0, otherwise it returns the buffer ID
+ /// of the stacked file. The full path to the included file can be found in
+ /// \p IncludedFile.
+ unsigned AddIncludeFile(const std::string &Filename, SMLoc IncludeLoc,
+ std::string &IncludedFile);
+
+ /// Return the ID of the buffer containing the specified location.
+ ///
+ /// 0 is returned if the buffer is not found.
+ unsigned FindBufferContainingLoc(SMLoc Loc) const;
+
+ /// Find the line number for the specified location in the specified file.
+ /// This is not a fast method.
+ unsigned FindLineNumber(SMLoc Loc, unsigned BufferID = 0) const {
+ return getLineAndColumn(Loc, BufferID).first;
+ }
+
+ /// Find the line and column number for the specified location in the
+ /// specified file. This is not a fast method.
+ std::pair<unsigned, unsigned> getLineAndColumn(SMLoc Loc,
+ unsigned BufferID = 0) const;
+
+ /// Emit a message about the specified location with the specified string.
+ ///
+ /// \param ShowColors Display colored messages if output is a terminal and
+ /// the default error handler is used.
+ void PrintMessage(raw_ostream &OS, SMLoc Loc, DiagKind Kind,
+ const Twine &Msg,
+ ArrayRef<SMRange> Ranges = None,
+ ArrayRef<SMFixIt> FixIts = None,
+ bool ShowColors = true) const;
+
+ /// Emits a diagnostic to llvm::errs().
+ void PrintMessage(SMLoc Loc, DiagKind Kind, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = None,
+ ArrayRef<SMFixIt> FixIts = None,
+ bool ShowColors = true) const;
+
+ /// Emits a manually-constructed diagnostic to the given output stream.
+ ///
+ /// \param ShowColors Display colored messages if output is a terminal and
+ /// the default error handler is used.
+ void PrintMessage(raw_ostream &OS, const SMDiagnostic &Diagnostic,
+ bool ShowColors = true) const;
+
+ /// Return an SMDiagnostic at the specified location with the specified
+ /// string.
+ ///
+ /// \param Msg If non-null, the kind of message (e.g., "error") which is
+ /// prefixed to the message.
+ SMDiagnostic GetMessage(SMLoc Loc, DiagKind Kind, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = None,
+ ArrayRef<SMFixIt> FixIts = None) const;
+
+ /// Prints the names of included files and the line of the file they were
+ /// included from. A diagnostic handler can use this before printing its
+ /// custom formatted message.
+ ///
+ /// \param IncludeLoc The location of the include.
+ /// \param OS the raw_ostream to print on.
+ void PrintIncludeStack(SMLoc IncludeLoc, raw_ostream &OS) const;
+};
+
+/// Represents a single fixit, a replacement of one range of text with another.
+class SMFixIt {
+ SMRange Range;
+
+ std::string Text;
+
+public:
+ // FIXME: Twine.str() is not very efficient.
+ SMFixIt(SMLoc Loc, const Twine &Insertion)
+ : Range(Loc, Loc), Text(Insertion.str()) {
+ assert(Loc.isValid());
+ }
+
+ // FIXME: Twine.str() is not very efficient.
+ SMFixIt(SMRange R, const Twine &Replacement)
+ : Range(R), Text(Replacement.str()) {
+ assert(R.isValid());
+ }
+
+ StringRef getText() const { return Text; }
+ SMRange getRange() const { return Range; }
+
+ bool operator<(const SMFixIt &Other) const {
+ if (Range.Start.getPointer() != Other.Range.Start.getPointer())
+ return Range.Start.getPointer() < Other.Range.Start.getPointer();
+ if (Range.End.getPointer() != Other.Range.End.getPointer())
+ return Range.End.getPointer() < Other.Range.End.getPointer();
+ return Text < Other.Text;
+ }
+};
+
+/// Instances of this class encapsulate one diagnostic report, allowing
+/// printing to a raw_ostream as a caret diagnostic.
+class SMDiagnostic {
+ const SourceMgr *SM = nullptr;
+ SMLoc Loc;
+ std::string Filename;
+ int LineNo = 0;
+ int ColumnNo = 0;
+ SourceMgr::DiagKind Kind = SourceMgr::DK_Error;
+ std::string Message, LineContents;
+ std::vector<std::pair<unsigned, unsigned>> Ranges;
+ SmallVector<SMFixIt, 4> FixIts;
+
+public:
+ // Null diagnostic.
+ SMDiagnostic() = default;
+ // Diagnostic with no location (e.g. file not found, command line arg error).
+ SMDiagnostic(StringRef filename, SourceMgr::DiagKind Knd, StringRef Msg)
+ : Filename(filename), LineNo(-1), ColumnNo(-1), Kind(Knd), Message(Msg) {}
+
+ // Diagnostic with a location.
+ SMDiagnostic(const SourceMgr &sm, SMLoc L, StringRef FN,
+ int Line, int Col, SourceMgr::DiagKind Kind,
+ StringRef Msg, StringRef LineStr,
+ ArrayRef<std::pair<unsigned,unsigned>> Ranges,
+ ArrayRef<SMFixIt> FixIts = None);
+
+ const SourceMgr *getSourceMgr() const { return SM; }
+ SMLoc getLoc() const { return Loc; }
+ StringRef getFilename() const { return Filename; }
+ int getLineNo() const { return LineNo; }
+ int getColumnNo() const { return ColumnNo; }
+ SourceMgr::DiagKind getKind() const { return Kind; }
+ StringRef getMessage() const { return Message; }
+ StringRef getLineContents() const { return LineContents; }
+ ArrayRef<std::pair<unsigned, unsigned>> getRanges() const { return Ranges; }
+
+ void addFixIt(const SMFixIt &Hint) {
+ FixIts.push_back(Hint);
+ }
+
+ ArrayRef<SMFixIt> getFixIts() const {
+ return FixIts;
+ }
+
+ void print(const char *ProgName, raw_ostream &S, bool ShowColors = true,
+ bool ShowKindLabel = true) const;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_SUPPORT_SOURCEMGR_H