Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 124 insertions, 0 deletions

diff --git a/gnu/llvm/clang/lib/Format/TokenAnalyzer.cpp b/gnu/llvm/clang/lib/Format/TokenAnalyzer.cpp
new file mode 100644
index 00000000000..eb98a205d52
--- /dev/null
+++ b/gnu/llvm/clang/lib/Format/TokenAnalyzer.cpp
@@ -0,0 +1,124 @@
+//===--- TokenAnalyzer.cpp - Analyze Token Streams --------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// 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.
+///
+//===----------------------------------------------------------------------===//
+
+#include "TokenAnalyzer.h"
+#include "AffectedRangeManager.h"
+#include "Encoding.h"
+#include "FormatToken.h"
+#include "FormatTokenLexer.h"
+#include "TokenAnnotator.h"
+#include "UnwrappedLineParser.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/DiagnosticOptions.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Format/Format.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/Debug.h"
+
+#define DEBUG_TYPE "format-formatter"
+
+namespace clang {
+namespace format {
+
+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));
+  }
+}
+
+TokenAnalyzer::TokenAnalyzer(const Environment &Env, const FormatStyle &Style)
+    : Style(Style), Env(Env),
+      AffectedRangeMgr(Env.getSourceManager(), Env.getCharRanges()),
+      UnwrappedLines(1),
+      Encoding(encoding::detectEncoding(
+          Env.getSourceManager().getBufferData(Env.getFileID()))) {
+  LLVM_DEBUG(
+      llvm::dbgs() << "File encoding: "
+                   << (Encoding == encoding::Encoding_UTF8 ? "UTF8" : "unknown")
+                   << "\n");
+  LLVM_DEBUG(llvm::dbgs() << "Language: " << getLanguageName(Style.Language)
+                          << "\n");
+}
+
+std::pair<tooling::Replacements, unsigned> TokenAnalyzer::process() {
+  tooling::Replacements Result;
+  FormatTokenLexer Tokens(Env.getSourceManager(), Env.getFileID(),
+                          Env.getFirstStartColumn(), Style, Encoding);
+
+  UnwrappedLineParser Parser(Style, Tokens.getKeywords(),
+                             Env.getFirstStartColumn(), Tokens.lex(), *this);
+  Parser.parse();
+  assert(UnwrappedLines.rbegin()->empty());
+  unsigned Penalty = 0;
+  for (unsigned Run = 0, RunE = UnwrappedLines.size(); Run + 1 != RunE; ++Run) {
+    LLVM_DEBUG(llvm::dbgs() << "Run " << Run << "...\n");
+    SmallVector<AnnotatedLine *, 16> AnnotatedLines;
+
+    TokenAnnotator Annotator(Style, Tokens.getKeywords());
+    for (unsigned i = 0, e = UnwrappedLines[Run].size(); i != e; ++i) {
+      AnnotatedLines.push_back(new AnnotatedLine(UnwrappedLines[Run][i]));
+      Annotator.annotate(*AnnotatedLines.back());
+    }
+
+    std::pair<tooling::Replacements, unsigned> RunResult =
+        analyze(Annotator, AnnotatedLines, Tokens);
+
+    LLVM_DEBUG({
+      llvm::dbgs() << "Replacements for run " << Run << ":\n";
+      for (tooling::Replacements::const_iterator I = RunResult.first.begin(),
+                                                 E = RunResult.first.end();
+           I != E; ++I) {
+        llvm::dbgs() << I->toString() << "\n";
+      }
+    });
+    for (unsigned i = 0, e = AnnotatedLines.size(); i != e; ++i) {
+      delete AnnotatedLines[i];
+    }
+
+    Penalty += RunResult.second;
+    for (const auto &R : RunResult.first) {
+      auto Err = Result.add(R);
+      // FIXME: better error handling here. For now, simply return an empty
+      // Replacements to indicate failure.
+      if (Err) {
+        llvm::errs() << llvm::toString(std::move(Err)) << "\n";
+        return {tooling::Replacements(), 0};
+      }
+    }
+  }
+  return {Result, Penalty};
+}
+
+void TokenAnalyzer::consumeUnwrappedLine(const UnwrappedLine &TheLine) {
+  assert(!UnwrappedLines.empty());
+  UnwrappedLines.back().push_back(TheLine);
+}
+
+void TokenAnalyzer::finishRun() {
+  UnwrappedLines.push_back(SmallVector<UnwrappedLine, 16>());
+}
+
+} // end namespace format
+} // end namespace clang