clang 19.0.0git
AtomicChange.cpp
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1//===--- AtomicChange.cpp - AtomicChange implementation -----------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
11#include "llvm/Support/YAMLTraits.h"
12#include <string>
13
14LLVM_YAML_IS_SEQUENCE_VECTOR(clang::tooling::AtomicChange)
15
16namespace {
17/// Helper to (de)serialize an AtomicChange since we don't have direct
18/// access to its data members.
19/// Data members of a normalized AtomicChange can be directly mapped from/to
20/// YAML string.
21struct NormalizedAtomicChange {
22 NormalizedAtomicChange() = default;
23
24 NormalizedAtomicChange(const llvm::yaml::IO &) {}
25
26 // This converts AtomicChange's internal implementation of the replacements
27 // set to a vector of replacements.
28 NormalizedAtomicChange(const llvm::yaml::IO &,
30 : Key(E.getKey()), FilePath(E.getFilePath()), Error(E.getError()),
31 InsertedHeaders(E.getInsertedHeaders()),
32 RemovedHeaders(E.getRemovedHeaders()),
33 Replaces(E.getReplacements().begin(), E.getReplacements().end()) {}
34
35 // This is not expected to be called but needed for template instantiation.
36 clang::tooling::AtomicChange denormalize(const llvm::yaml::IO &) {
37 llvm_unreachable("Do not convert YAML to AtomicChange directly with '>>'. "
38 "Use AtomicChange::convertFromYAML instead.");
39 }
40 std::string Key;
41 std::string FilePath;
42 std::string Error;
43 std::vector<std::string> InsertedHeaders;
44 std::vector<std::string> RemovedHeaders;
45 std::vector<clang::tooling::Replacement> Replaces;
46};
47} // anonymous namespace
48
49namespace llvm {
50namespace yaml {
51
52/// Specialized MappingTraits to describe how an AtomicChange is
53/// (de)serialized.
54template <> struct MappingTraits<NormalizedAtomicChange> {
55 static void mapping(IO &Io, NormalizedAtomicChange &Doc) {
56 Io.mapRequired("Key", Doc.Key);
57 Io.mapRequired("FilePath", Doc.FilePath);
58 Io.mapRequired("Error", Doc.Error);
59 Io.mapRequired("InsertedHeaders", Doc.InsertedHeaders);
60 Io.mapRequired("RemovedHeaders", Doc.RemovedHeaders);
61 Io.mapRequired("Replacements", Doc.Replaces);
62 }
63};
64
65/// Specialized MappingTraits to describe how an AtomicChange is
66/// (de)serialized.
67template <> struct MappingTraits<clang::tooling::AtomicChange> {
68 static void mapping(IO &Io, clang::tooling::AtomicChange &Doc) {
69 MappingNormalization<NormalizedAtomicChange, clang::tooling::AtomicChange>
70 Keys(Io, Doc);
71 Io.mapRequired("Key", Keys->Key);
72 Io.mapRequired("FilePath", Keys->FilePath);
73 Io.mapRequired("Error", Keys->Error);
74 Io.mapRequired("InsertedHeaders", Keys->InsertedHeaders);
75 Io.mapRequired("RemovedHeaders", Keys->RemovedHeaders);
76 Io.mapRequired("Replacements", Keys->Replaces);
77 }
78};
79
80} // end namespace yaml
81} // end namespace llvm
82
83namespace clang {
84namespace tooling {
85namespace {
86
87// Returns true if there is any line that violates \p ColumnLimit in range
88// [Start, End].
89bool violatesColumnLimit(llvm::StringRef Code, unsigned ColumnLimit,
90 unsigned Start, unsigned End) {
91 auto StartPos = Code.rfind('\n', Start);
92 StartPos = (StartPos == llvm::StringRef::npos) ? 0 : StartPos + 1;
93
94 auto EndPos = Code.find("\n", End);
95 if (EndPos == llvm::StringRef::npos)
96 EndPos = Code.size();
97
99 Code.substr(StartPos, EndPos - StartPos).split(Lines, '\n');
100 for (llvm::StringRef Line : Lines)
101 if (Line.size() > ColumnLimit)
102 return true;
103 return false;
104}
105
106std::vector<Range>
107getRangesForFormating(llvm::StringRef Code, unsigned ColumnLimit,
109 const clang::tooling::Replacements &Replaces) {
110 // kNone suppresses formatting entirely.
111 if (Format == ApplyChangesSpec::kNone)
112 return {};
113 std::vector<clang::tooling::Range> Ranges;
114 // This works assuming that replacements are ordered by offset.
115 // FIXME: use `getAffectedRanges()` to calculate when it does not include '\n'
116 // at the end of an insertion in affected ranges.
117 int Offset = 0;
118 for (const clang::tooling::Replacement &R : Replaces) {
119 int Start = R.getOffset() + Offset;
120 int End = Start + R.getReplacementText().size();
121 if (!R.getReplacementText().empty() &&
122 R.getReplacementText().back() == '\n' && R.getLength() == 0 &&
123 R.getOffset() > 0 && R.getOffset() <= Code.size() &&
124 Code[R.getOffset() - 1] == '\n')
125 // If we are inserting at the start of a line and the replacement ends in
126 // a newline, we don't need to format the subsequent line.
127 --End;
128 Offset += R.getReplacementText().size() - R.getLength();
129
130 if (Format == ApplyChangesSpec::kAll ||
131 violatesColumnLimit(Code, ColumnLimit, Start, End))
132 Ranges.emplace_back(Start, End - Start);
133 }
134 return Ranges;
135}
136
137inline llvm::Error make_string_error(const llvm::Twine &Message) {
138 return llvm::make_error<llvm::StringError>(Message,
139 llvm::inconvertibleErrorCode());
140}
141
142// Creates replacements for inserting/deleting #include headers.
144createReplacementsForHeaders(llvm::StringRef FilePath, llvm::StringRef Code,
146 const format::FormatStyle &Style) {
147 // Create header insertion/deletion replacements to be cleaned up
148 // (i.e. converted to real insertion/deletion replacements).
149 Replacements HeaderReplacements;
150 for (const auto &Change : Changes) {
151 for (llvm::StringRef Header : Change.getInsertedHeaders()) {
152 std::string EscapedHeader =
153 Header.starts_with("<") || Header.starts_with("\"")
154 ? Header.str()
155 : ("\"" + Header + "\"").str();
156 std::string ReplacementText = "#include " + EscapedHeader;
157 // Offset UINT_MAX and length 0 indicate that the replacement is a header
158 // insertion.
159 llvm::Error Err = HeaderReplacements.add(
160 tooling::Replacement(FilePath, UINT_MAX, 0, ReplacementText));
161 if (Err)
162 return std::move(Err);
163 }
164 for (const std::string &Header : Change.getRemovedHeaders()) {
165 // Offset UINT_MAX and length 1 indicate that the replacement is a header
166 // deletion.
167 llvm::Error Err =
168 HeaderReplacements.add(Replacement(FilePath, UINT_MAX, 1, Header));
169 if (Err)
170 return std::move(Err);
171 }
172 }
173
174 // cleanupAroundReplacements() converts header insertions/deletions into
175 // actual replacements that add/remove headers at the right location.
176 return clang::format::cleanupAroundReplacements(Code, HeaderReplacements,
177 Style);
178}
179
180// Combine replacements in all Changes as a `Replacements`. This ignores the
181// file path in all replacements and replaces them with \p FilePath.
183combineReplacementsInChanges(llvm::StringRef FilePath,
185 Replacements Replaces;
186 for (const auto &Change : Changes)
187 for (const auto &R : Change.getReplacements())
188 if (auto Err = Replaces.add(Replacement(
189 FilePath, R.getOffset(), R.getLength(), R.getReplacementText())))
190 return std::move(Err);
191 return Replaces;
192}
193
194} // end namespace
195
196AtomicChange::AtomicChange(const SourceManager &SM,
197 SourceLocation KeyPosition) {
198 const FullSourceLoc FullKeyPosition(KeyPosition, SM);
199 std::pair<FileID, unsigned> FileIDAndOffset =
200 FullKeyPosition.getSpellingLoc().getDecomposedLoc();
201 OptionalFileEntryRef FE = SM.getFileEntryRefForID(FileIDAndOffset.first);
202 assert(FE && "Cannot create AtomicChange with invalid location.");
203 FilePath = std::string(FE->getName());
204 Key = FilePath + ":" + std::to_string(FileIDAndOffset.second);
205}
206
207AtomicChange::AtomicChange(const SourceManager &SM, SourceLocation KeyPosition,
208 llvm::Any M)
209 : AtomicChange(SM, KeyPosition) {
210 Metadata = std::move(M);
211}
212
213AtomicChange::AtomicChange(std::string Key, std::string FilePath,
214 std::string Error,
215 std::vector<std::string> InsertedHeaders,
216 std::vector<std::string> RemovedHeaders,
218 : Key(std::move(Key)), FilePath(std::move(FilePath)),
219 Error(std::move(Error)), InsertedHeaders(std::move(InsertedHeaders)),
220 RemovedHeaders(std::move(RemovedHeaders)), Replaces(std::move(Replaces)) {
221}
222
224 if (Key != Other.Key || FilePath != Other.FilePath || Error != Other.Error)
225 return false;
226 if (!(Replaces == Other.Replaces))
227 return false;
228 // FXIME: Compare header insertions/removals.
229 return true;
230}
231
233 std::string YamlContent;
234 llvm::raw_string_ostream YamlContentStream(YamlContent);
235
236 llvm::yaml::Output YAML(YamlContentStream);
237 YAML << *this;
238 YamlContentStream.flush();
239 return YamlContent;
240}
241
242AtomicChange AtomicChange::convertFromYAML(llvm::StringRef YAMLContent) {
243 NormalizedAtomicChange NE;
244 llvm::yaml::Input YAML(YAMLContent);
245 YAML >> NE;
246 AtomicChange E(NE.Key, NE.FilePath, NE.Error, NE.InsertedHeaders,
247 NE.RemovedHeaders, tooling::Replacements());
248 for (const auto &R : NE.Replaces) {
249 llvm::Error Err = E.Replaces.add(R);
250 if (Err)
251 llvm_unreachable(
252 "Failed to add replacement when Converting YAML to AtomicChange.");
253 llvm::consumeError(std::move(Err));
254 }
255 return E;
256}
257
259 const CharSourceRange &Range,
260 llvm::StringRef ReplacementText) {
261 return Replaces.add(Replacement(SM, Range, ReplacementText));
262}
263
265 unsigned Length, llvm::StringRef Text) {
266 return Replaces.add(Replacement(SM, Loc, Length, Text));
267}
268
270 llvm::StringRef Text, bool InsertAfter) {
271 if (Text.empty())
272 return llvm::Error::success();
273 Replacement R(SM, Loc, 0, Text);
274 llvm::Error Err = Replaces.add(R);
275 if (Err) {
276 return llvm::handleErrors(
277 std::move(Err), [&](const ReplacementError &RE) -> llvm::Error {
279 return llvm::make_error<ReplacementError>(RE);
280 unsigned NewOffset = Replaces.getShiftedCodePosition(R.getOffset());
281 if (!InsertAfter)
282 NewOffset -=
283 RE.getExistingReplacement()->getReplacementText().size();
284 Replacement NewR(R.getFilePath(), NewOffset, 0, Text);
285 Replaces = Replaces.merge(Replacements(NewR));
286 return llvm::Error::success();
287 });
288 }
289 return llvm::Error::success();
290}
291
292void AtomicChange::addHeader(llvm::StringRef Header) {
293 InsertedHeaders.push_back(std::string(Header));
294}
295
296void AtomicChange::removeHeader(llvm::StringRef Header) {
297 RemovedHeaders.push_back(std::string(Header));
298}
299
301applyAtomicChanges(llvm::StringRef FilePath, llvm::StringRef Code,
303 const ApplyChangesSpec &Spec) {
304 llvm::Expected<Replacements> HeaderReplacements =
305 createReplacementsForHeaders(FilePath, Code, Changes, Spec.Style);
306 if (!HeaderReplacements)
307 return make_string_error(
308 "Failed to create replacements for header changes: " +
309 llvm::toString(HeaderReplacements.takeError()));
310
312 combineReplacementsInChanges(FilePath, Changes);
313 if (!Replaces)
314 return make_string_error("Failed to combine replacements in all changes: " +
315 llvm::toString(Replaces.takeError()));
316
317 Replacements AllReplaces = std::move(*Replaces);
318 for (const auto &R : *HeaderReplacements) {
319 llvm::Error Err = AllReplaces.add(R);
320 if (Err)
321 return make_string_error(
322 "Failed to combine existing replacements with header replacements: " +
323 llvm::toString(std::move(Err)));
324 }
325
326 if (Spec.Cleanup) {
327 llvm::Expected<Replacements> CleanReplaces =
328 format::cleanupAroundReplacements(Code, AllReplaces, Spec.Style);
329 if (!CleanReplaces)
330 return make_string_error("Failed to cleanup around replacements: " +
331 llvm::toString(CleanReplaces.takeError()));
332 AllReplaces = std::move(*CleanReplaces);
333 }
334
335 // Apply all replacements.
336 llvm::Expected<std::string> ChangedCode =
337 applyAllReplacements(Code, AllReplaces);
338 if (!ChangedCode)
339 return make_string_error("Failed to apply all replacements: " +
340 llvm::toString(ChangedCode.takeError()));
341
342 // Sort inserted headers. This is done even if other formatting is turned off
343 // as incorrectly sorted headers are always just wrong, it's not a matter of
344 // taste.
345 Replacements HeaderSortingReplacements = format::sortIncludes(
346 Spec.Style, *ChangedCode, AllReplaces.getAffectedRanges(), FilePath);
347 ChangedCode = applyAllReplacements(*ChangedCode, HeaderSortingReplacements);
348 if (!ChangedCode)
349 return make_string_error(
350 "Failed to apply replacements for sorting includes: " +
351 llvm::toString(ChangedCode.takeError()));
352
353 AllReplaces = AllReplaces.merge(HeaderSortingReplacements);
354
355 std::vector<Range> FormatRanges = getRangesForFormating(
356 *ChangedCode, Spec.Style.ColumnLimit, Spec.Format, AllReplaces);
357 if (!FormatRanges.empty()) {
358 Replacements FormatReplacements =
359 format::reformat(Spec.Style, *ChangedCode, FormatRanges, FilePath);
360 ChangedCode = applyAllReplacements(*ChangedCode, FormatReplacements);
361 if (!ChangedCode)
362 return make_string_error(
363 "Failed to apply replacements for formatting changed code: " +
364 llvm::toString(ChangedCode.takeError()));
365 }
366 return ChangedCode;
367}
368
369} // end namespace tooling
370} // end namespace clang
#define SM(sm)
Definition: Cuda.cpp:82
StringRef Text
Definition: Format.cpp:2975
This file defines the structure of a YAML document for serializing replacements.
Represents a character-granular source range.
StringRef getName() const
The name of this FileEntry.
Definition: FileEntry.h:61
A SourceLocation and its associated SourceManager.
FullSourceLoc getSpellingLoc() const
std::pair< FileID, unsigned > getDecomposedLoc() const
Decompose the specified location into a raw FileID + Offset pair.
Encodes a location in the source.
This class handles loading and caching of source files into memory.
An atomic change is used to create and group a set of source edits, e.g.
Definition: AtomicChange.h:37
void removeHeader(llvm::StringRef Header)
Removes a header from the file that contains the key position.
std::string toYAMLString()
Returns the atomic change as a YAML string.
void addHeader(llvm::StringRef Header)
Adds a header into the file that contains the key position.
llvm::Error insert(const SourceManager &SM, SourceLocation Loc, llvm::StringRef Text, bool InsertAfter=true)
Adds a replacement that inserts Text at Loc.
static AtomicChange convertFromYAML(llvm::StringRef YAMLContent)
Converts a YAML-encoded automic change to AtomicChange.
bool operator==(const AtomicChange &Other) const
llvm::Error replace(const SourceManager &SM, const CharSourceRange &Range, llvm::StringRef ReplacementText)
Adds a replacement that replaces the given Range with ReplacementText.
A source range independent of the SourceManager.
Definition: Replacement.h:44
Carries extra error information in replacement-related llvm::Error, e.g.
Definition: Replacement.h:154
replacement_error get() const
Definition: Replacement.h:172
const std::optional< Replacement > & getExistingReplacement() const
Definition: Replacement.h:180
A text replacement.
Definition: Replacement.h:83
StringRef getFilePath() const
Accessors.
Definition: Replacement.h:120
unsigned getOffset() const
Definition: Replacement.h:121
Maintains a set of replacements that are conflict-free.
Definition: Replacement.h:212
std::vector< Range > getAffectedRanges() const
llvm::Error add(const Replacement &R)
Adds a new replacement R to the current set of replacements.
Replacements merge(const Replacements &Replaces) const
Merges Replaces into the current replacements.
#define UINT_MAX
Definition: limits.h:60
llvm::Expected< tooling::Replacements > cleanupAroundReplacements(StringRef Code, const tooling::Replacements &Replaces, const FormatStyle &Style)
Returns the replacements corresponding to applying Replaces and cleaning up the code after that on su...
Definition: Format.cpp:3581
tooling::Replacements reformat(const FormatStyle &Style, StringRef Code, ArrayRef< tooling::Range > Ranges, StringRef FileName="<stdin>", FormattingAttemptStatus *Status=nullptr)
Reformats the given Ranges in Code.
Definition: Format.cpp:3784
tooling::Replacements sortIncludes(const FormatStyle &Style, StringRef Code, ArrayRef< tooling::Range > Ranges, StringRef FileName, unsigned *Cursor=nullptr)
Returns the replacements necessary to sort all #include blocks that are affected by Ranges.
Definition: Format.cpp:3429
bool applyAllReplacements(const Replacements &Replaces, Rewriter &Rewrite)
Apply all replacements in Replaces to the Rewriter Rewrite.
static llvm::Error make_string_error(const llvm::Twine &Message)
llvm::Expected< std::string > applyAtomicChanges(llvm::StringRef FilePath, llvm::StringRef Code, llvm::ArrayRef< AtomicChange > Changes, const ApplyChangesSpec &Spec)
Applies all AtomicChanges in Changes to the Code.
The JSON file list parser is used to communicate input to InstallAPI.
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
@ Other
Other implicit parameter.
YAML serialization mapping.
Definition: Dominators.h:30
Definition: Format.h:5279
unsigned ColumnLimit
The column limit.
Definition: Format.h:2250
static void mapping(IO &Io, NormalizedAtomicChange &Doc)
static void mapping(IO &Io, clang::tooling::AtomicChange &Doc)