From 486754660bb926339aefcf012a3f848592babb8b Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Sat, 28 Jul 2018 11:06:01 +0000
Subject: Vendor import of clang trunk r338150:
 https://llvm.org/svn/llvm-project/cfe/trunk@338150

---
 lib/Format/TokenAnalyzer.cpp | 57 +++++++++++---------------------------------
 1 file changed, 14 insertions(+), 43 deletions(-)

(limited to 'lib/Format/TokenAnalyzer.cpp')

diff --git a/lib/Format/TokenAnalyzer.cpp b/lib/Format/TokenAnalyzer.cpp
index d1dfb1fea32b..99fc61ef1c32 100644
--- a/lib/Format/TokenAnalyzer.cpp
+++ b/lib/Format/TokenAnalyzer.cpp
@@ -8,7 +8,7 @@
 //===----------------------------------------------------------------------===//
 ///
 /// \file
-/// \brief This file implements an abstract TokenAnalyzer and associated helper
+/// This file implements an abstract TokenAnalyzer and associated helper
 /// classes. TokenAnalyzer can be extended to generate replacements based on
 /// an annotated and pre-processed token stream.
 ///
@@ -34,48 +34,19 @@
 namespace clang {
 namespace format {
 
-// This sets up an virtual file system with file \p FileName containing \p
-// Code.
-std::unique_ptr<Environment>
-Environment::CreateVirtualEnvironment(StringRef Code, StringRef FileName,
-                                      ArrayRef<tooling::Range> Ranges,
-                                      unsigned FirstStartColumn,
-                                      unsigned NextStartColumn,
-                                      unsigned LastStartColumn) {
-  // This is referenced by `FileMgr` and will be released by `FileMgr` when it
-  // is deleted.
-  IntrusiveRefCntPtr<vfs::InMemoryFileSystem> InMemoryFileSystem(
-      new vfs::InMemoryFileSystem);
-  // This is passed to `SM` as reference, so the pointer has to be referenced
-  // in `Environment` so that `FileMgr` can out-live this function scope.
-  std::unique_ptr<FileManager> FileMgr(
-      new FileManager(FileSystemOptions(), InMemoryFileSystem));
-  // This is passed to `SM` as reference, so the pointer has to be referenced
-  // by `Environment` due to the same reason above.
-  std::unique_ptr<DiagnosticsEngine> Diagnostics(new DiagnosticsEngine(
-      IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs),
-      new DiagnosticOptions));
-  // This will be stored as reference, so the pointer has to be stored in
-  // due to the same reason above.
-  std::unique_ptr<SourceManager> VirtualSM(
-      new SourceManager(*Diagnostics, *FileMgr));
-  InMemoryFileSystem->addFile(
-      FileName, 0,
-      llvm::MemoryBuffer::getMemBuffer(Code, FileName,
-                                       /*RequiresNullTerminator=*/false));
-  FileID ID = VirtualSM->createFileID(FileMgr->getFile(FileName),
-                                      SourceLocation(), clang::SrcMgr::C_User);
-  assert(ID.isValid());
-  SourceLocation StartOfFile = VirtualSM->getLocForStartOfFile(ID);
-  std::vector<CharSourceRange> CharRanges;
+Environment::Environment(StringRef Code, StringRef FileName,
+                         ArrayRef<tooling::Range> Ranges,
+                         unsigned FirstStartColumn, unsigned NextStartColumn,
+                         unsigned LastStartColumn)
+    : VirtualSM(new SourceManagerForFile(FileName, Code)), SM(VirtualSM->get()),
+      ID(VirtualSM->get().getMainFileID()), FirstStartColumn(FirstStartColumn),
+      NextStartColumn(NextStartColumn), LastStartColumn(LastStartColumn) {
+  SourceLocation StartOfFile = SM.getLocForStartOfFile(ID);
   for (const tooling::Range &Range : Ranges) {
     SourceLocation Start = StartOfFile.getLocWithOffset(Range.getOffset());
     SourceLocation End = Start.getLocWithOffset(Range.getLength());
     CharRanges.push_back(CharSourceRange::getCharRange(Start, End));
   }
-  return llvm::make_unique<Environment>(
-      ID, std::move(FileMgr), std::move(VirtualSM), std::move(Diagnostics),
-      CharRanges, FirstStartColumn, NextStartColumn, LastStartColumn);
 }
 
 TokenAnalyzer::TokenAnalyzer(const Environment &Env, const FormatStyle &Style)
@@ -84,12 +55,12 @@ TokenAnalyzer::TokenAnalyzer(const Environment &Env, const FormatStyle &Style)
       UnwrappedLines(1),
       Encoding(encoding::detectEncoding(
           Env.getSourceManager().getBufferData(Env.getFileID()))) {
-  DEBUG(
+  LLVM_DEBUG(
       llvm::dbgs() << "File encoding: "
                    << (Encoding == encoding::Encoding_UTF8 ? "UTF8" : "unknown")
                    << "\n");
-  DEBUG(llvm::dbgs() << "Language: " << getLanguageName(Style.Language)
-                     << "\n");
+  LLVM_DEBUG(llvm::dbgs() << "Language: " << getLanguageName(Style.Language)
+                          << "\n");
 }
 
 std::pair<tooling::Replacements, unsigned> TokenAnalyzer::process() {
@@ -103,7 +74,7 @@ std::pair<tooling::Replacements, unsigned> TokenAnalyzer::process() {
   assert(UnwrappedLines.rbegin()->empty());
   unsigned Penalty = 0;
   for (unsigned Run = 0, RunE = UnwrappedLines.size(); Run + 1 != RunE; ++Run) {
-    DEBUG(llvm::dbgs() << "Run " << Run << "...\n");
+    LLVM_DEBUG(llvm::dbgs() << "Run " << Run << "...\n");
     SmallVector<AnnotatedLine *, 16> AnnotatedLines;
 
     TokenAnnotator Annotator(Style, Tokens.getKeywords());
@@ -115,7 +86,7 @@ std::pair<tooling::Replacements, unsigned> TokenAnalyzer::process() {
     std::pair<tooling::Replacements, unsigned> RunResult =
         analyze(Annotator, AnnotatedLines, Tokens);
 
-    DEBUG({
+    LLVM_DEBUG({
       llvm::dbgs() << "Replacements for run " << Run << ":\n";
       for (tooling::Replacements::const_iterator I = RunResult.first.begin(),
                                                  E = RunResult.first.end();
-- 
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