71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
//===--- Transformer.cpp - Transformer library implementation ---*- 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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#include "clang/Tooling/Transformer/Transformer.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/ASTMatchers/ASTMatchersInternal.h"
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#include "clang/Basic/SourceLocation.h"
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#include "clang/Tooling/Refactoring/AtomicChange.h"
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#include "llvm/Support/Error.h"
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#include <map>
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#include <utility>
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#include <vector>
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using namespace clang;
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using namespace tooling;
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using ast_matchers::MatchFinder;
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void Transformer::registerMatchers(MatchFinder *MatchFinder) {
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for (auto &Matcher : transformer::detail::buildMatchers(Rule))
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MatchFinder->addDynamicMatcher(Matcher, this);
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}
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void Transformer::run(const MatchFinder::MatchResult &Result) {
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if (Result.Context->getDiagnostics().hasErrorOccurred())
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return;
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transformer::RewriteRule::Case Case =
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transformer::detail::findSelectedCase(Result, Rule);
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auto Transformations = Case.Edits(Result);
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if (!Transformations) {
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Consumer(Transformations.takeError());
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return;
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}
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if (Transformations->empty())
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return;
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// Group the transformations, by file, into AtomicChanges, each anchored by
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// the location of the first change in that file.
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std::map<FileID, AtomicChange> ChangesByFileID;
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for (const auto &T : *Transformations) {
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auto ID = Result.SourceManager->getFileID(T.Range.getBegin());
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auto Iter = ChangesByFileID
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.emplace(ID, AtomicChange(*Result.SourceManager,
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T.Range.getBegin(), T.Metadata))
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.first;
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auto &AC = Iter->second;
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switch (T.Kind) {
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case transformer::EditKind::Range:
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if (auto Err =
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AC.replace(*Result.SourceManager, T.Range, T.Replacement)) {
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Consumer(std::move(Err));
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return;
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}
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break;
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case transformer::EditKind::AddInclude:
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AC.addHeader(T.Replacement);
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break;
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}
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}
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for (auto &IDChangePair : ChangesByFileID)
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Consumer(std::move(IDChangePair.second));
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}
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