| 1 | //===--- Transformer.cpp - Transformer library implementation ---*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "clang/Tooling/Transformer/Transformer.h" |
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| 10 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
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| 11 | #include "clang/ASTMatchers/ASTMatchersInternal.h" |
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| 12 | #include "clang/Basic/SourceLocation.h" |
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| 13 | #include "clang/Tooling/Refactoring/AtomicChange.h" |
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| 14 | #include "llvm/Support/Error.h" |
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| 15 | #include <map> |
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| 16 | #include <utility> |
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| 17 | |
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| 18 | namespace clang { |
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| 19 | namespace tooling { |
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| 20 | |
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| 21 | using ::clang::ast_matchers::MatchFinder; |
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| 22 | |
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| 23 | namespace detail { |
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| 24 | |
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| 25 | void TransformerImpl::onMatch( |
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| 26 | const ast_matchers::MatchFinder::MatchResult &Result) { |
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| 27 | if (Result.Context->getDiagnostics().hasErrorOccurred()) |
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| 28 | return; |
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| 29 | |
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| 30 | onMatchImpl(Result); |
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| 31 | } |
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| 32 | |
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| 33 | llvm::Expected<llvm::SmallVector<AtomicChange, 1>> |
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| 34 | TransformerImpl::convertToAtomicChanges( |
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| 35 | const llvm::SmallVectorImpl<transformer::Edit> &Edits, |
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| 36 | const MatchFinder::MatchResult &Result) { |
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| 37 | // Group the transformations, by file, into AtomicChanges, each anchored by |
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| 38 | // the location of the first change in that file. |
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| 39 | std::map<FileID, AtomicChange> ChangesByFileID; |
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| 40 | for (const auto &T : Edits) { |
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| 41 | auto ID = Result.SourceManager->getFileID(SpellingLoc: T.Range.getBegin()); |
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| 42 | auto Iter = ChangesByFileID |
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| 43 | .emplace(args&: ID, args: AtomicChange(*Result.SourceManager, |
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| 44 | T.Range.getBegin(), T.Metadata)) |
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| 45 | .first; |
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| 46 | auto &AC = Iter->second; |
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| 47 | switch (T.Kind) { |
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| 48 | case transformer::EditKind::Range: |
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| 49 | if (auto Err = |
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| 50 | AC.replace(SM: *Result.SourceManager, Range: T.Range, ReplacementText: T.Replacement)) { |
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| 51 | return std::move(Err); |
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| 52 | } |
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| 53 | break; |
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| 54 | case transformer::EditKind::AddInclude: |
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| 55 | AC.addHeader(Header: T.Replacement); |
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| 56 | break; |
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| 57 | } |
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| 58 | } |
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| 59 | |
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| 60 | llvm::SmallVector<AtomicChange, 1> Changes; |
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| 61 | Changes.reserve(N: ChangesByFileID.size()); |
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| 62 | for (auto &IDChangePair : ChangesByFileID) |
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| 63 | Changes.push_back(Elt: std::move(IDChangePair.second)); |
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| 64 | |
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| 65 | return Changes; |
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| 66 | } |
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| 67 | |
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| 68 | } // namespace detail |
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| 69 | |
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| 70 | void Transformer::registerMatchers(MatchFinder *MatchFinder) { |
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| 71 | for (auto &Matcher : Impl->buildMatchers()) |
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| 72 | MatchFinder->addDynamicMatcher(NodeMatch: Matcher, Action: this); |
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| 73 | } |
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| 74 | |
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| 75 | void Transformer::run(const MatchFinder::MatchResult &Result) { |
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| 76 | if (Result.Context->getDiagnostics().hasErrorOccurred()) |
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| 77 | return; |
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| 78 | |
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| 79 | Impl->onMatch(Result); |
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| 80 | } |
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| 81 | |
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| 82 | } // namespace tooling |
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| 83 | } // namespace clang |
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| 84 | |
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