001 /*
002 * Copyright 2010-2015 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.jetbrains.kotlin.codegen.inline;
018
019 import com.intellij.util.ArrayUtil;
020 import kotlin.jvm.functions.Function0;
021 import org.jetbrains.annotations.NotNull;
022 import org.jetbrains.kotlin.codegen.AsmUtil;
023 import org.jetbrains.kotlin.codegen.ClassBuilder;
024 import org.jetbrains.kotlin.codegen.FieldInfo;
025 import org.jetbrains.kotlin.codegen.StackValue;
026 import org.jetbrains.kotlin.codegen.state.GenerationState;
027 import org.jetbrains.kotlin.codegen.state.JetTypeMapper;
028 import org.jetbrains.org.objectweb.asm.*;
029 import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
030 import org.jetbrains.org.objectweb.asm.tree.*;
031
032 import java.util.*;
033
034 import static org.jetbrains.kotlin.codegen.inline.InlineCodegenUtil.isThis0;
035 import static org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin.NO_ORIGIN;
036
037 public class AnonymousObjectTransformer {
038
039 protected final GenerationState state;
040
041 protected final JetTypeMapper typeMapper;
042
043 private final InlineResult transformationResult;
044
045 private MethodNode constructor;
046
047 private String sourceInfo;
048
049 private String debugInfo;
050
051 private SourceMapper sourceMapper;
052
053 private final InliningContext inliningContext;
054
055 private final Type oldObjectType;
056
057 private final Type newLambdaType;
058
059 private final ClassReader reader;
060
061 private final boolean isSameModule;
062
063 private final Map<String, List<String>> fieldNames = new HashMap<String, List<String>>();
064
065 public AnonymousObjectTransformer(
066 @NotNull String objectInternalName,
067 @NotNull InliningContext inliningContext,
068 boolean isSameModule,
069 @NotNull Type newLambdaType
070 ) {
071 this.isSameModule = isSameModule;
072 this.state = inliningContext.state;
073 this.typeMapper = state.getTypeMapper();
074 this.inliningContext = inliningContext;
075 this.oldObjectType = Type.getObjectType(objectInternalName);
076 this.newLambdaType = newLambdaType;
077
078 reader = InlineCodegenUtil.buildClassReaderByInternalName(state, objectInternalName);
079 transformationResult = InlineResult.create();
080 }
081
082 @NotNull
083 public InlineResult doTransform(@NotNull AnonymousObjectGeneration anonymousObjectGen, @NotNull FieldRemapper parentRemapper) {
084 final List<InnerClassNode> innerClassNodes = new ArrayList<InnerClassNode>();
085 ClassBuilder classBuilder = createClassBuilder();
086 final List<MethodNode> methodsToTransform = new ArrayList<MethodNode>();
087
088 reader.accept(new ClassVisitor(InlineCodegenUtil.API, classBuilder.getVisitor()) {
089 @Override
090 public void visit(int version, int access, @NotNull String name, String signature, String superName, String[] interfaces) {
091 InlineCodegenUtil.assertVersionNotGreaterThanJava6(version, name);
092 super.visit(version, access, name, signature, superName, interfaces);
093 }
094
095 @Override
096 public void visitInnerClass(@NotNull String name, String outerName, String innerName, int access) {
097 innerClassNodes.add(new InnerClassNode(name, outerName, innerName, access));
098 }
099
100 @Override
101 public MethodVisitor visitMethod(
102 int access, @NotNull String name, @NotNull String desc, String signature, String[] exceptions
103 ) {
104 MethodNode node = new MethodNode(access, name, desc, signature, exceptions);
105 if (name.equals("<init>")){
106 if (constructor != null)
107 throw new RuntimeException("Lambda, SAM or anonymous object should have only one constructor");
108
109 constructor = node;
110 } else {
111 methodsToTransform.add(node);
112 }
113 return node;
114 }
115
116 @Override
117 public FieldVisitor visitField(
118 int access, @NotNull String name, @NotNull String desc, String signature, Object value
119 ) {
120 addUniqueField(name);
121 if (InlineCodegenUtil.isCapturedFieldName(name)) {
122 return null;
123 } else {
124 return super.visitField(access, name, desc, signature, value);
125 }
126 }
127
128 @Override
129 public void visitSource(String source, String debug) {
130 sourceInfo = source;
131 debugInfo = debug;
132 }
133
134 @Override
135 public void visitEnd() {
136
137 }
138 }, ClassReader.SKIP_FRAMES);
139
140 if (!inliningContext.isInliningLambda) {
141 if (debugInfo != null && !debugInfo.isEmpty()) {
142 sourceMapper = SourceMapper.Companion.createFromSmap(SMAPParser.parse(debugInfo));
143 }
144 else {
145 //seems we can't do any clever mapping cause we don't know any about original class name
146 sourceMapper = IdenticalSourceMapper.INSTANCE;
147 }
148 if (sourceInfo != null && !InlineCodegenUtil.GENERATE_SMAP) {
149 classBuilder.visitSource(sourceInfo, debugInfo);
150 }
151 }
152 else {
153 if (sourceInfo != null) {
154 classBuilder.visitSource(sourceInfo, debugInfo);
155 }
156 sourceMapper = IdenticalSourceMapper.INSTANCE;
157 }
158
159 ParametersBuilder allCapturedParamBuilder = ParametersBuilder.newBuilder();
160 ParametersBuilder constructorParamBuilder = ParametersBuilder.newBuilder();
161 List<CapturedParamInfo> additionalFakeParams =
162 extractParametersMappingAndPatchConstructor(constructor, allCapturedParamBuilder, constructorParamBuilder,
163 anonymousObjectGen, parentRemapper);
164 List<MethodVisitor> deferringMethods = new ArrayList<MethodVisitor>();
165
166 for (MethodNode next : methodsToTransform) {
167 MethodVisitor deferringVisitor = newMethod(classBuilder, next);
168 InlineResult funResult =
169 inlineMethodAndUpdateGlobalResult(anonymousObjectGen, parentRemapper, deferringVisitor, next, allCapturedParamBuilder, false);
170
171 Type returnType = Type.getReturnType(next.desc);
172 if (!AsmUtil.isPrimitive(returnType)) {
173 String oldFunReturnType = returnType.getInternalName();
174 String newFunReturnType = funResult.getChangedTypes().get(oldFunReturnType);
175 if (newFunReturnType != null) {
176 inliningContext.typeRemapper.addAdditionalMappings(oldFunReturnType, newFunReturnType);
177 }
178 }
179 deferringMethods.add(deferringVisitor);
180 }
181
182 for (MethodVisitor method : deferringMethods) {
183 method.visitEnd();
184 }
185
186 generateConstructorAndFields(classBuilder, allCapturedParamBuilder, constructorParamBuilder, anonymousObjectGen, parentRemapper, additionalFakeParams);
187
188 SourceMapper.Companion.flushToClassBuilder(sourceMapper, classBuilder);
189
190 ClassVisitor visitor = classBuilder.getVisitor();
191 for (InnerClassNode node : innerClassNodes) {
192 visitor.visitInnerClass(node.name, node.outerName, node.innerName, node.access);
193 }
194
195 writeOuterInfo(visitor);
196
197 classBuilder.done();
198
199 anonymousObjectGen.setNewLambdaType(newLambdaType);
200 return transformationResult;
201 }
202
203 private void writeOuterInfo(@NotNull ClassVisitor visitor) {
204 InlineCallSiteInfo info = inliningContext.getCallSiteInfo();
205 visitor.visitOuterClass(info.getOwnerClassName(), info.getFunctionName(), info.getFunctionDesc());
206 }
207
208 @NotNull
209 private InlineResult inlineMethodAndUpdateGlobalResult(
210 @NotNull AnonymousObjectGeneration anonymousObjectGen,
211 @NotNull FieldRemapper parentRemapper,
212 @NotNull MethodVisitor deferringVisitor,
213 @NotNull MethodNode next,
214 @NotNull ParametersBuilder allCapturedParamBuilder,
215 boolean isConstructor
216 ) {
217 InlineResult funResult = inlineMethod(anonymousObjectGen, parentRemapper, deferringVisitor, next, allCapturedParamBuilder, isConstructor);
218 transformationResult.addAllClassesToRemove(funResult);
219 transformationResult.getReifiedTypeParametersUsages().mergeAll(funResult.getReifiedTypeParametersUsages());
220 return funResult;
221 }
222
223 @NotNull
224 private InlineResult inlineMethod(
225 @NotNull AnonymousObjectGeneration anonymousObjectGen,
226 @NotNull FieldRemapper parentRemapper,
227 @NotNull MethodVisitor deferringVisitor,
228 @NotNull MethodNode sourceNode,
229 @NotNull ParametersBuilder capturedBuilder,
230 boolean isConstructor
231 ) {
232 ReifiedTypeParametersUsages typeParametersToReify = inliningContext.reifedTypeInliner.reifyInstructions(sourceNode);
233 Parameters parameters = isConstructor ? capturedBuilder.buildParameters() : getMethodParametersWithCaptured(capturedBuilder, sourceNode);
234
235 RegeneratedLambdaFieldRemapper remapper =
236 new RegeneratedLambdaFieldRemapper(oldObjectType.getInternalName(), newLambdaType.getInternalName(),
237 parameters, anonymousObjectGen.getCapturedLambdasToInline(),
238 parentRemapper, isConstructor);
239
240 MethodInliner inliner =
241 new MethodInliner(
242 sourceNode,
243 parameters,
244 inliningContext.subInline(inliningContext.nameGenerator.subGenerator("lambda")),
245 remapper,
246 isSameModule,
247 "Transformer for " + anonymousObjectGen.getOwnerInternalName(),
248 sourceMapper,
249 new InlineCallSiteInfo(
250 anonymousObjectGen.getOwnerInternalName(),
251 sourceNode.name,
252 isConstructor ? anonymousObjectGen.getNewConstructorDescriptor() : sourceNode.desc)
253 );
254
255 InlineResult result = inliner.doInline(deferringVisitor, new LocalVarRemapper(parameters, 0), false, LabelOwner.NOT_APPLICABLE);
256 result.getReifiedTypeParametersUsages().mergeAll(typeParametersToReify);
257 deferringVisitor.visitMaxs(-1, -1);
258 return result;
259 }
260
261 private void generateConstructorAndFields(
262 @NotNull ClassBuilder classBuilder,
263 @NotNull ParametersBuilder allCapturedBuilder,
264 @NotNull ParametersBuilder constructorInlineBuilder,
265 @NotNull AnonymousObjectGeneration anonymousObjectGen,
266 @NotNull FieldRemapper parentRemapper,
267 @NotNull List<CapturedParamInfo> constructorAdditionalFakeParams
268 ) {
269 List<Type> descTypes = new ArrayList<Type>();
270
271 Parameters constructorParams = constructorInlineBuilder.buildParameters();
272 int [] capturedIndexes = new int [constructorParams.getReal().size() + constructorParams.getCaptured().size()];
273 int index = 0;
274 int size = 0;
275
276 //complex processing cause it could have super constructor call params
277 for (ParameterInfo info : constructorParams) {
278 if (!info.isSkipped()) { //not inlined
279 if (info.isCaptured() || info instanceof CapturedParamInfo) {
280 capturedIndexes[index] = size;
281 index++;
282 }
283
284 if (size != 0) { //skip this
285 descTypes.add(info.getType());
286 }
287 size += info.getType().getSize();
288 }
289 }
290
291 String constructorDescriptor = Type.getMethodDescriptor(Type.VOID_TYPE, descTypes.toArray(new Type[descTypes.size()]));
292 //TODO for inline method make public class
293 anonymousObjectGen.setNewConstructorDescriptor(constructorDescriptor);
294 MethodVisitor constructorVisitor = classBuilder.newMethod(NO_ORIGIN,
295 AsmUtil.NO_FLAG_PACKAGE_PRIVATE,
296 "<init>", constructorDescriptor,
297 null, ArrayUtil.EMPTY_STRING_ARRAY);
298
299 //initialize captured fields
300 List<NewJavaField> newFieldsWithSkipped = TransformationUtilsKt.getNewFieldsToGenerate(allCapturedBuilder.listCaptured());
301 List<FieldInfo> fieldInfoWithSkipped = TransformationUtilsKt.transformToFieldInfo(newLambdaType, newFieldsWithSkipped);
302
303 int paramIndex = 0;
304 InstructionAdapter capturedFieldInitializer = new InstructionAdapter(constructorVisitor);
305 for (int i = 0; i < fieldInfoWithSkipped.size(); i++) {
306 FieldInfo fieldInfo = fieldInfoWithSkipped.get(i);
307 if (!newFieldsWithSkipped.get(i).getSkip()) {
308 AsmUtil.genAssignInstanceFieldFromParam(fieldInfo, capturedIndexes[paramIndex], capturedFieldInitializer);
309 }
310 paramIndex++;
311 }
312
313 //then transform constructor
314 //HACK: in inlinining into constructor we access original captured fields with field access not local var
315 //but this fields added to general params (this assumes local var access) not captured one,
316 //so we need to add them to captured params
317 for (CapturedParamInfo info : constructorAdditionalFakeParams) {
318 CapturedParamInfo fake = constructorInlineBuilder.addCapturedParamCopy(info);
319
320 if (fake.getLambda() != null) {
321 //set remap value to skip this fake (captured with lambda already skipped)
322 StackValue composed = StackValue.field(fake.getType(),
323 oldObjectType,
324 fake.getNewFieldName(),
325 false,
326 StackValue.LOCAL_0);
327 fake.setRemapValue(composed);
328 }
329 }
330
331 inlineMethodAndUpdateGlobalResult(anonymousObjectGen, parentRemapper, capturedFieldInitializer, constructor, constructorInlineBuilder, true);
332 constructorVisitor.visitEnd();
333 AsmUtil.genClosureFields(TransformationUtilsKt.toNameTypePair(TransformationUtilsKt.filterSkipped(newFieldsWithSkipped)), classBuilder);
334 }
335
336 @NotNull
337 private Parameters getMethodParametersWithCaptured(
338 @NotNull ParametersBuilder capturedBuilder,
339 @NotNull MethodNode sourceNode
340 ) {
341 ParametersBuilder builder = ParametersBuilder.initializeBuilderFrom(oldObjectType, sourceNode.desc);
342 for (CapturedParamInfo param : capturedBuilder.listCaptured()) {
343 builder.addCapturedParamCopy(param);
344 }
345 return builder.buildParameters();
346 }
347
348 @NotNull
349 private ClassBuilder createClassBuilder() {
350 ClassBuilder classBuilder = state.getFactory().newVisitor(NO_ORIGIN, newLambdaType, inliningContext.getRoot().callElement.getContainingFile());
351
352 return new RemappingClassBuilder(
353 classBuilder,
354 new AsmTypeRemapper(inliningContext.typeRemapper, inliningContext.getRoot().typeParameterMappings == null, transformationResult)
355 );
356 }
357
358 @NotNull
359 private static DeferredMethodVisitor newMethod(@NotNull final ClassBuilder builder, @NotNull final MethodNode original) {
360 return new DeferredMethodVisitor(
361 new MethodNode(original.access,
362 original.name,
363 original.desc,
364 original.signature,
365 ArrayUtil.toStringArray(original.exceptions)),
366
367 new Function0<MethodVisitor>() {
368 @Override
369 public MethodVisitor invoke() {
370 return builder.newMethod(
371 NO_ORIGIN,
372 original.access,
373 original.name,
374 original.desc,
375 original.signature,
376 ArrayUtil.toStringArray(original.exceptions));
377 }
378 });
379 }
380
381 private List<CapturedParamInfo> extractParametersMappingAndPatchConstructor(
382 @NotNull MethodNode constructor,
383 @NotNull ParametersBuilder capturedParamBuilder,
384 @NotNull ParametersBuilder constructorParamBuilder,
385 @NotNull final AnonymousObjectGeneration anonymousObjectGen,
386 @NotNull FieldRemapper parentFieldRemapper
387 ) {
388
389 CapturedParamOwner owner = new CapturedParamOwner() {
390 @Override
391 public Type getType() {
392 return Type.getObjectType(anonymousObjectGen.getOwnerInternalName());
393 }
394 };
395
396 Set<LambdaInfo> capturedLambdas = new LinkedHashSet<LambdaInfo>(); //captured var of inlined parameter
397 List<CapturedParamInfo> constructorAdditionalFakeParams = new ArrayList<CapturedParamInfo>();
398 Map<Integer, LambdaInfo> indexToLambda = anonymousObjectGen.getLambdasToInline();
399 Set<Integer> capturedParams = new HashSet<Integer>();
400
401 //load captured parameters and patch instruction list (NB: there is also could be object fields)
402 AbstractInsnNode cur = constructor.instructions.getFirst();
403 while (cur != null) {
404 if (cur instanceof FieldInsnNode) {
405 FieldInsnNode fieldNode = (FieldInsnNode) cur;
406 String fieldName = fieldNode.name;
407 if (fieldNode.getOpcode() == Opcodes.PUTFIELD && InlineCodegenUtil.isCapturedFieldName(fieldName)) {
408
409 boolean isPrevVarNode = fieldNode.getPrevious() instanceof VarInsnNode;
410 boolean isPrevPrevVarNode = isPrevVarNode && fieldNode.getPrevious().getPrevious() instanceof VarInsnNode;
411
412 if (isPrevPrevVarNode) {
413 VarInsnNode node = (VarInsnNode) fieldNode.getPrevious().getPrevious();
414 if (node.var == 0) {
415 VarInsnNode previous = (VarInsnNode) fieldNode.getPrevious();
416 int varIndex = previous.var;
417 LambdaInfo lambdaInfo = indexToLambda.get(varIndex);
418 String newFieldName = isThis0(fieldName) && shouldRenameThis0(parentFieldRemapper, indexToLambda.values()) ? getNewFieldName(fieldName, true) : fieldName;
419 CapturedParamInfo info = capturedParamBuilder.addCapturedParam(owner, fieldName, newFieldName, Type.getType(fieldNode.desc), lambdaInfo != null, null);
420 if (lambdaInfo != null) {
421 info.setLambda(lambdaInfo);
422 capturedLambdas.add(lambdaInfo);
423 }
424 constructorAdditionalFakeParams.add(info);
425 capturedParams.add(varIndex);
426
427 constructor.instructions.remove(previous.getPrevious());
428 constructor.instructions.remove(previous);
429 AbstractInsnNode temp = cur;
430 cur = cur.getNext();
431 constructor.instructions.remove(temp);
432 continue;
433 }
434 }
435 }
436 }
437 cur = cur.getNext();
438 }
439
440 constructorParamBuilder.addThis(oldObjectType, false);
441 String constructorDesc = anonymousObjectGen.getConstructorDesc();
442
443 if (constructorDesc == null) {
444 // in case of anonymous object with empty closure
445 constructorDesc = Type.getMethodDescriptor(Type.VOID_TYPE);
446 }
447
448 Type [] types = Type.getArgumentTypes(constructorDesc);
449 for (Type type : types) {
450 LambdaInfo info = indexToLambda.get(constructorParamBuilder.getNextValueParameterIndex());
451 ParameterInfo parameterInfo = constructorParamBuilder.addNextParameter(type, info != null, null);
452 parameterInfo.setLambda(info);
453 if (capturedParams.contains(parameterInfo.getIndex())) {
454 parameterInfo.setCaptured(true);
455 } else {
456 //otherwise it's super constructor parameter
457 }
458 }
459
460 //For all inlined lambdas add their captured parameters
461 //TODO: some of such parameters could be skipped - we should perform additional analysis
462 Map<String, LambdaInfo> capturedLambdasToInline = new HashMap<String, LambdaInfo>(); //captured var of inlined parameter
463 List<CapturedParamDesc> allRecapturedParameters = new ArrayList<CapturedParamDesc>();
464 boolean addCapturedNotAddOuter = parentFieldRemapper.isRoot() || (parentFieldRemapper instanceof InlinedLambdaRemapper && parentFieldRemapper.getParent().isRoot());
465 Map<String, CapturedParamInfo> alreadyAdded = new HashMap<String, CapturedParamInfo>();
466 for (LambdaInfo info : capturedLambdas) {
467 if (addCapturedNotAddOuter) {
468 for (CapturedParamDesc desc : info.getCapturedVars()) {
469 String key = desc.getFieldName() + "$$$" + desc.getType().getClassName();
470 CapturedParamInfo alreadyAddedParam = alreadyAdded.get(key);
471
472 CapturedParamInfo recapturedParamInfo = capturedParamBuilder.addCapturedParam(
473 desc,
474 alreadyAddedParam != null ? alreadyAddedParam.getNewFieldName() : getNewFieldName(desc.getFieldName(), false));
475 StackValue composed = StackValue.field(desc.getType(),
476 oldObjectType, /*TODO owner type*/
477 recapturedParamInfo.getNewFieldName(),
478 false,
479 StackValue.LOCAL_0);
480 recapturedParamInfo.setRemapValue(composed);
481 allRecapturedParameters.add(desc);
482
483 constructorParamBuilder.addCapturedParam(recapturedParamInfo, recapturedParamInfo.getNewFieldName()).setRemapValue(composed);
484 if (alreadyAddedParam != null) {
485 recapturedParamInfo.setSkipInConstructor(true);
486 }
487
488 if (isThis0(desc.getFieldName())) {
489 alreadyAdded.put(key, recapturedParamInfo);
490 }
491 }
492 }
493 capturedLambdasToInline.put(info.getLambdaClassType().getInternalName(), info);
494 }
495
496 if (parentFieldRemapper instanceof InlinedLambdaRemapper && !capturedLambdas.isEmpty() && !addCapturedNotAddOuter) {
497 //lambda with non InlinedLambdaRemapper already have outer
498 FieldRemapper parent = parentFieldRemapper.getParent();
499 assert parent instanceof RegeneratedLambdaFieldRemapper;
500 final Type ownerType = Type.getObjectType(parent.getLambdaInternalName());
501
502 CapturedParamDesc desc = new CapturedParamDesc(new CapturedParamOwner() {
503 @Override
504 public Type getType() {
505 return ownerType;
506 }
507 }, InlineCodegenUtil.THIS, ownerType);
508 CapturedParamInfo recapturedParamInfo = capturedParamBuilder.addCapturedParam(desc, InlineCodegenUtil.THIS$0/*outer lambda/object*/);
509 StackValue composed = StackValue.LOCAL_0;
510 recapturedParamInfo.setRemapValue(composed);
511 allRecapturedParameters.add(desc);
512
513 constructorParamBuilder.addCapturedParam(recapturedParamInfo, recapturedParamInfo.getNewFieldName()).setRemapValue(composed);
514 }
515
516 anonymousObjectGen.setAllRecapturedParameters(allRecapturedParameters);
517 anonymousObjectGen.setCapturedLambdasToInline(capturedLambdasToInline);
518
519 return constructorAdditionalFakeParams;
520 }
521
522 private static boolean shouldRenameThis0(@NotNull FieldRemapper parentFieldRemapper, Collection<LambdaInfo> values) {
523 if (isFirstDeclSiteLambdaFieldRemapper(parentFieldRemapper)) {
524 for (LambdaInfo value : values) {
525 for (CapturedParamDesc desc : value.getCapturedVars()) {
526 if (isThis0(desc.getFieldName())) {
527 return true;
528 }
529 }
530 }
531 }
532 return false;
533 }
534
535 @NotNull
536 public String getNewFieldName(@NotNull String oldName, boolean originalField) {
537 if (InlineCodegenUtil.THIS$0.equals(oldName)) {
538 if (!originalField) {
539 return oldName;
540 } else {
541 //rename original 'this$0' in declaration site lambda (inside inline function) to use this$0 only for outer lambda/object access on call site
542 return addUniqueField(oldName + InlineCodegenUtil.INLINE_FUN_THIS_0_SUFFIX);
543 }
544 }
545 return addUniqueField(oldName + InlineCodegenUtil.INLINE_TRANSFORMATION_SUFFIX);
546 }
547
548 @NotNull
549 private String addUniqueField(@NotNull String name) {
550 List<String> existNames = fieldNames.get(name);
551 if (existNames == null) {
552 existNames = new LinkedList<String>();
553 fieldNames.put(name, existNames);
554 }
555 String suffix = existNames.isEmpty() ? "" : "$" + existNames.size();
556 String newName = name + suffix;
557 existNames.add(newName);
558 return newName;
559 }
560
561 private static boolean isFirstDeclSiteLambdaFieldRemapper(FieldRemapper parentRemapper) {
562 return !(parentRemapper instanceof RegeneratedLambdaFieldRemapper) && !(parentRemapper instanceof InlinedLambdaRemapper);
563 }
564 }