forked from OSchip/llvm-project
125 lines
4.7 KiB
C++
125 lines
4.7 KiB
C++
//===--- TokenAnalyzer.cpp - Analyze Token Streams --------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file implements an abstract TokenAnalyzer and associated helper
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/// classes. TokenAnalyzer can be extended to generate replacements based on
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/// an annotated and pre-processed token stream.
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///
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//===----------------------------------------------------------------------===//
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#include "TokenAnalyzer.h"
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#include "AffectedRangeManager.h"
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#include "Encoding.h"
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#include "FormatToken.h"
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#include "FormatTokenLexer.h"
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#include "TokenAnnotator.h"
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#include "UnwrappedLineParser.h"
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/DiagnosticOptions.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Format/Format.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Support/Debug.h"
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#define DEBUG_TYPE "format-formatter"
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namespace clang {
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namespace format {
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Environment::Environment(StringRef Code, StringRef FileName,
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ArrayRef<tooling::Range> Ranges,
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unsigned FirstStartColumn, unsigned NextStartColumn,
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unsigned LastStartColumn)
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: VirtualSM(new SourceManagerForFile(FileName, Code)), SM(VirtualSM->get()),
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ID(VirtualSM->get().getMainFileID()), FirstStartColumn(FirstStartColumn),
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NextStartColumn(NextStartColumn), LastStartColumn(LastStartColumn) {
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SourceLocation StartOfFile = SM.getLocForStartOfFile(ID);
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for (const tooling::Range &Range : Ranges) {
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SourceLocation Start = StartOfFile.getLocWithOffset(Range.getOffset());
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SourceLocation End = Start.getLocWithOffset(Range.getLength());
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CharRanges.push_back(CharSourceRange::getCharRange(Start, End));
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}
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}
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TokenAnalyzer::TokenAnalyzer(const Environment &Env, const FormatStyle &Style)
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: Style(Style), Env(Env),
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AffectedRangeMgr(Env.getSourceManager(), Env.getCharRanges()),
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UnwrappedLines(1),
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Encoding(encoding::detectEncoding(
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Env.getSourceManager().getBufferData(Env.getFileID()))) {
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LLVM_DEBUG(
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llvm::dbgs() << "File encoding: "
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<< (Encoding == encoding::Encoding_UTF8 ? "UTF8" : "unknown")
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<< "\n");
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LLVM_DEBUG(llvm::dbgs() << "Language: " << getLanguageName(Style.Language)
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<< "\n");
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}
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std::pair<tooling::Replacements, unsigned> TokenAnalyzer::process() {
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tooling::Replacements Result;
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FormatTokenLexer Tokens(Env.getSourceManager(), Env.getFileID(),
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Env.getFirstStartColumn(), Style, Encoding);
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UnwrappedLineParser Parser(Style, Tokens.getKeywords(),
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Env.getFirstStartColumn(), Tokens.lex(), *this);
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Parser.parse();
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assert(UnwrappedLines.rbegin()->empty());
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unsigned Penalty = 0;
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for (unsigned Run = 0, RunE = UnwrappedLines.size(); Run + 1 != RunE; ++Run) {
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LLVM_DEBUG(llvm::dbgs() << "Run " << Run << "...\n");
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SmallVector<AnnotatedLine *, 16> AnnotatedLines;
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TokenAnnotator Annotator(Style, Tokens.getKeywords());
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for (unsigned i = 0, e = UnwrappedLines[Run].size(); i != e; ++i) {
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AnnotatedLines.push_back(new AnnotatedLine(UnwrappedLines[Run][i]));
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Annotator.annotate(*AnnotatedLines.back());
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}
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std::pair<tooling::Replacements, unsigned> RunResult =
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analyze(Annotator, AnnotatedLines, Tokens);
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LLVM_DEBUG({
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llvm::dbgs() << "Replacements for run " << Run << ":\n";
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for (tooling::Replacements::const_iterator I = RunResult.first.begin(),
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E = RunResult.first.end();
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I != E; ++I) {
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llvm::dbgs() << I->toString() << "\n";
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}
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});
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for (unsigned i = 0, e = AnnotatedLines.size(); i != e; ++i) {
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delete AnnotatedLines[i];
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}
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Penalty += RunResult.second;
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for (const auto &R : RunResult.first) {
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auto Err = Result.add(R);
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// FIXME: better error handling here. For now, simply return an empty
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// Replacements to indicate failure.
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if (Err) {
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llvm::errs() << llvm::toString(std::move(Err)) << "\n";
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return {tooling::Replacements(), 0};
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}
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}
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}
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return {Result, Penalty};
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}
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void TokenAnalyzer::consumeUnwrappedLine(const UnwrappedLine &TheLine) {
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assert(!UnwrappedLines.empty());
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UnwrappedLines.back().push_back(TheLine);
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}
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void TokenAnalyzer::finishRun() {
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UnwrappedLines.push_back(SmallVector<UnwrappedLine, 16>());
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}
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} // end namespace format
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} // end namespace clang
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