/**
* @see
* org.eclipse.jdt.internal.compiler.ast.BinaryExpression#resolveType(org.eclipse.jdt.internal.compiler.lookup.BlockScope)
*/
public TypeBinding resolveType(BlockScope scope) {
TypeBinding result = super.resolveType(scope);
// check whether comparing identical expressions
Binding leftDirect = Expression.getDirectBinding(this.left);
if (leftDirect != null && leftDirect == Expression.getDirectBinding(this.right)) {
if (!(this.right instanceof Assignment))
scope.problemReporter().comparingIdenticalExpressions(this);
}
return result;
}
public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
for (int i = 0, max = dimensions.length; i < max; i++) {
Expression dim;
if ((dim = dimensions[i]) != null) {
flowInfo = dim.analyseCode(currentScope, flowContext, flowInfo);
}
}
if (initializer != null) {
return initializer.analyseCode(currentScope, flowContext, flowInfo);
}
return flowInfo;
}
protected boolean isBoxingCompatible(
TypeBinding expressionType, TypeBinding targetType, Expression expression, Scope scope) {
if (scope.isBoxingCompatibleWith(expressionType, targetType)) return true;
return expressionType
.isBaseType() // narrowing then boxing ? Only allowed for some target types see 362279
&& !targetType.isBaseType()
&& !targetType.isTypeVariable()
&& scope.compilerOptions().sourceLevel
>= org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants.JDK1_5 // autoboxing
&& (targetType.id == TypeIds.T_JavaLangByte
|| targetType.id == TypeIds.T_JavaLangShort
|| targetType.id == TypeIds.T_JavaLangCharacter)
&& expression.isConstantValueOfTypeAssignableToType(
expressionType, scope.environment().computeBoxingType(targetType));
}
/** Analysing arguments of MessageSend, ExplicitConstructorCall, AllocationExpression. */
protected void analyseArguments(
BlockScope currentScope,
FlowContext flowContext,
FlowInfo flowInfo,
MethodBinding methodBinding,
Expression[] arguments) {
// compare actual null-status against parameter annotations of the called method:
if (arguments != null) {
CompilerOptions compilerOptions = currentScope.compilerOptions();
boolean considerTypeAnnotations =
compilerOptions.sourceLevel >= ClassFileConstants.JDK1_8
&& compilerOptions.isAnnotationBasedNullAnalysisEnabled;
boolean hasJDK15NullAnnotations = methodBinding.parameterNonNullness != null;
int numParamsToCheck = methodBinding.parameters.length;
if (considerTypeAnnotations || hasJDK15NullAnnotations) {
// check if varargs need special treatment:
boolean passThrough = false;
if (methodBinding.isVarargs()) {
int varArgPos = numParamsToCheck - 1;
// this if-block essentially copied from generateArguments(..):
if (numParamsToCheck == arguments.length) {
TypeBinding varArgsType = methodBinding.parameters[varArgPos];
TypeBinding lastType = arguments[varArgPos].resolvedType;
if (lastType == TypeBinding.NULL
|| (varArgsType.dimensions() == lastType.dimensions()
&& lastType.isCompatibleWith(varArgsType)))
passThrough = true; // pass directly as-is
}
if (!passThrough)
numParamsToCheck--; // with non-passthrough varargs last param is fed from individual
// args -> don't check
}
}
if (considerTypeAnnotations) {
for (int i = 0; i < numParamsToCheck; i++) {
TypeBinding expectedType = methodBinding.parameters[i];
Expression argument = arguments[i];
// prefer check based on type annotations:
int severity = findNullTypeAnnotationMismatch(expectedType, argument.resolvedType);
if (severity > 0) {
// immediate reporting:
currentScope
.problemReporter()
.nullityMismatchingTypeAnnotation(
argument,
argument.resolvedType,
expectedType,
severity == 1,
currentScope.environment());
// next check flow-based null status against null JDK15-style annotations:
} else if (hasJDK15NullAnnotations
&& methodBinding.parameterNonNullness[i] == Boolean.TRUE) {
int nullStatus =
argument.nullStatus(
flowInfo,
flowContext); // slight loss of precision: should also use the null info from
// the receiver.
if (nullStatus != FlowInfo.NON_NULL) // if required non-null is not provided
flowContext.recordNullityMismatch(
currentScope, argument, argument.resolvedType, expectedType, nullStatus);
}
}
} else if (hasJDK15NullAnnotations) {
for (int i = 0; i < numParamsToCheck; i++) {
if (methodBinding.parameterNonNullness[i] == Boolean.TRUE) {
TypeBinding expectedType = methodBinding.parameters[i];
Expression argument = arguments[i];
int nullStatus =
argument.nullStatus(
flowInfo,
flowContext); // slight loss of precision: should also use the null info from
// the receiver.
if (nullStatus != FlowInfo.NON_NULL) // if required non-null is not provided
flowContext.recordNullityMismatch(
currentScope, argument, argument.resolvedType, expectedType, nullStatus);
}
}
}
}
}
public TypeBinding resolveType(BlockScope scope) {
// Propagate the type checking to the arguments, and check if the constructor is defined.
this.constant = Constant.NotAConstant;
if (this.type == null) {
// initialization of an enum constant
this.resolvedType = scope.enclosingReceiverType();
} else {
this.resolvedType = this.type.resolveType(scope, true /* check bounds*/);
checkParameterizedAllocation:
{
if (this.type
instanceof ParameterizedQualifiedTypeReference) { // disallow new X<String>.Y<Integer>()
ReferenceBinding currentType = (ReferenceBinding) this.resolvedType;
if (currentType == null) return currentType;
do {
// isStatic() is answering true for toplevel types
if ((currentType.modifiers & ClassFileConstants.AccStatic) != 0)
break checkParameterizedAllocation;
if (currentType.isRawType()) break checkParameterizedAllocation;
} while ((currentType = currentType.enclosingType()) != null);
ParameterizedQualifiedTypeReference qRef =
(ParameterizedQualifiedTypeReference) this.type;
for (int i = qRef.typeArguments.length - 2; i >= 0; i--) {
if (qRef.typeArguments[i] != null) {
scope
.problemReporter()
.illegalQualifiedParameterizedTypeAllocation(this.type, this.resolvedType);
break;
}
}
}
}
}
// will check for null after args are resolved
final boolean isDiamond = this.type != null && (this.type.bits & ASTNode.IsDiamond) != 0;
// resolve type arguments (for generic constructor call)
if (this.typeArguments != null) {
int length = this.typeArguments.length;
boolean argHasError = scope.compilerOptions().sourceLevel < ClassFileConstants.JDK1_5;
this.genericTypeArguments = new TypeBinding[length];
for (int i = 0; i < length; i++) {
TypeReference typeReference = this.typeArguments[i];
if ((this.genericTypeArguments[i] =
typeReference.resolveType(scope, true /* check bounds*/))
== null) {
argHasError = true;
}
if (argHasError && typeReference instanceof Wildcard) {
scope.problemReporter().illegalUsageOfWildcard(typeReference);
}
}
if (isDiamond) {
scope.problemReporter().diamondNotWithExplicitTypeArguments(this.typeArguments);
return null;
}
if (argHasError) {
if (this.arguments != null) { // still attempt to resolve arguments
for (int i = 0, max = this.arguments.length; i < max; i++) {
this.arguments[i].resolveType(scope);
}
}
return null;
}
}
// buffering the arguments' types
boolean argsContainCast = false;
TypeBinding[] argumentTypes = Binding.NO_PARAMETERS;
if (this.arguments != null) {
boolean argHasError = false;
int length = this.arguments.length;
argumentTypes = new TypeBinding[length];
for (int i = 0; i < length; i++) {
Expression argument = this.arguments[i];
if (argument instanceof CastExpression) {
argument.bits |= DisableUnnecessaryCastCheck; // will check later on
argsContainCast = true;
}
if ((argumentTypes[i] = argument.resolveType(scope)) == null) {
argHasError = true;
}
}
if (argHasError) {
/* https://bugs.eclipse.org/bugs/show_bug.cgi?id=345359, if arguments have errors, completely bail out in the <> case.
No meaningful type resolution is possible since inference of the elided types is fully tied to argument types. Do
not return the partially resolved type.
*/
if (isDiamond) {
return null; // not the partially cooked this.resolvedType
}
if (this.resolvedType instanceof ReferenceBinding) {
// record a best guess, for clients who need hint about possible constructor match
TypeBinding[] pseudoArgs = new TypeBinding[length];
for (int i = length; --i >= 0; ) {
pseudoArgs[i] =
argumentTypes[i] == null
? TypeBinding.NULL
: argumentTypes[i]; // replace args with errors with null type
}
this.binding =
scope.findMethod(
(ReferenceBinding) this.resolvedType, TypeConstants.INIT, pseudoArgs, this);
if (this.binding != null && !this.binding.isValidBinding()) {
MethodBinding closestMatch = ((ProblemMethodBinding) this.binding).closestMatch;
// record the closest match, for clients who may still need hint about possible method
// match
if (closestMatch != null) {
if (closestMatch.original().typeVariables
!= Binding.NO_TYPE_VARIABLES) { // generic method
// shouldn't return generic method outside its context, rather convert it to raw
// method (175409)
closestMatch =
scope
.environment()
.createParameterizedGenericMethod(
closestMatch.original(), (RawTypeBinding) null);
}
this.binding = closestMatch;
MethodBinding closestMatchOriginal = closestMatch.original();
if (closestMatchOriginal.isOrEnclosedByPrivateType()
&& !scope.isDefinedInMethod(closestMatchOriginal)) {
// ignore cases where method is used from within inside itself (e.g. direct
// recursions)
closestMatchOriginal.modifiers |= ExtraCompilerModifiers.AccLocallyUsed;
}
}
}
}
return this.resolvedType;
}
}
if (this.resolvedType == null || !this.resolvedType.isValidBinding()) {
return null;
}
// null type denotes fake allocation for enum constant inits
if (this.type != null && !this.resolvedType.canBeInstantiated()) {
scope.problemReporter().cannotInstantiate(this.type, this.resolvedType);
return this.resolvedType;
}
if (isDiamond) {
TypeBinding[] inferredTypes =
inferElidedTypes(
((ParameterizedTypeBinding) this.resolvedType).genericType(),
null,
argumentTypes,
scope);
if (inferredTypes == null) {
scope.problemReporter().cannotInferElidedTypes(this);
return this.resolvedType = null;
}
this.resolvedType =
this.type.resolvedType =
scope
.environment()
.createParameterizedType(
((ParameterizedTypeBinding) this.resolvedType).genericType(),
inferredTypes,
((ParameterizedTypeBinding) this.resolvedType).enclosingType());
}
ReferenceBinding allocationType = (ReferenceBinding) this.resolvedType;
if (!(this.binding = scope.getConstructor(allocationType, argumentTypes, this))
.isValidBinding()) {
if (this.binding.declaringClass == null) {
this.binding.declaringClass = allocationType;
}
if (this.type != null && !this.type.resolvedType.isValidBinding()) {
return null;
}
scope.problemReporter().invalidConstructor(this, this.binding);
return this.resolvedType;
}
if ((this.binding.tagBits & TagBits.HasMissingType) != 0) {
scope.problemReporter().missingTypeInConstructor(this, this.binding);
}
if (isMethodUseDeprecated(this.binding, scope, true))
scope.problemReporter().deprecatedMethod(this.binding, this);
if (checkInvocationArguments(
scope,
null,
allocationType,
this.binding,
this.arguments,
argumentTypes,
argsContainCast,
this)) {
this.bits |= ASTNode.Unchecked;
}
if (this.typeArguments != null
&& this.binding.original().typeVariables == Binding.NO_TYPE_VARIABLES) {
scope
.problemReporter()
.unnecessaryTypeArgumentsForMethodInvocation(
this.binding, this.genericTypeArguments, this.typeArguments);
}
if (!isDiamond && this.resolvedType.isParameterizedTypeWithActualArguments()) {
checkTypeArgumentRedundancy(
(ParameterizedTypeBinding) this.resolvedType, null, argumentTypes, scope);
}
final CompilerOptions compilerOptions = scope.compilerOptions();
if (compilerOptions.isAnnotationBasedNullAnalysisEnabled
&& (this.binding.tagBits & TagBits.IsNullnessKnown) == 0) {
new ImplicitNullAnnotationVerifier(
scope.environment(), compilerOptions.inheritNullAnnotations)
.checkImplicitNullAnnotations(this.binding, null /*srcMethod*/, false, scope);
}
return allocationType;
}
/** Code generation for a array initializer */
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
// Flatten the values and compute the dimensions, by iterating in depth into nested array
// initializers
int pc = codeStream.position;
int expressionLength = (this.expressions == null) ? 0 : this.expressions.length;
codeStream.generateInlinedValue(expressionLength);
codeStream.newArray(this.binding);
if (this.expressions != null) {
// binding is an ArrayType, so I can just deal with the dimension
int elementsTypeID = this.binding.dimensions > 1 ? -1 : this.binding.leafComponentType.id;
for (int i = 0; i < expressionLength; i++) {
Expression expr;
if ((expr = this.expressions[i]).constant != Constant.NotAConstant) {
switch (elementsTypeID) { // filter out initializations to default values
case T_int:
case T_short:
case T_byte:
case T_char:
case T_long:
if (expr.constant.longValue() != 0) {
codeStream.dup();
codeStream.generateInlinedValue(i);
expr.generateCode(currentScope, codeStream, true);
codeStream.arrayAtPut(elementsTypeID, false);
}
break;
case T_float:
case T_double:
double constantValue = expr.constant.doubleValue();
if (constantValue == -0.0 || constantValue != 0) {
codeStream.dup();
codeStream.generateInlinedValue(i);
expr.generateCode(currentScope, codeStream, true);
codeStream.arrayAtPut(elementsTypeID, false);
}
break;
case T_boolean:
if (expr.constant.booleanValue() != false) {
codeStream.dup();
codeStream.generateInlinedValue(i);
expr.generateCode(currentScope, codeStream, true);
codeStream.arrayAtPut(elementsTypeID, false);
}
break;
default:
if (!(expr instanceof NullLiteral)) {
codeStream.dup();
codeStream.generateInlinedValue(i);
expr.generateCode(currentScope, codeStream, true);
codeStream.arrayAtPut(elementsTypeID, false);
}
}
} else if (!(expr instanceof NullLiteral)) {
codeStream.dup();
codeStream.generateInlinedValue(i);
expr.generateCode(currentScope, codeStream, true);
codeStream.arrayAtPut(elementsTypeID, false);
}
}
}
if (valueRequired) {
codeStream.generateImplicitConversion(this.implicitConversion);
} else {
codeStream.pop();
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
}
public TypeBinding resolveTypeExpecting(BlockScope scope, TypeBinding expectedType) {
// Array initializers can only occur on the right hand side of an assignment
// expression, therefore the expected type contains the valid information
// concerning the type that must be enforced by the elements of the array initializer.
// this method is recursive... (the test on isArrayType is the stop case)
this.constant = Constant.NotAConstant;
if (expectedType instanceof ArrayBinding) {
// allow new List<?>[5]
if ((this.bits & IsAnnotationDefaultValue)
== 0) { // annotation default value need only to be commensurate JLS9.7
// allow new List<?>[5] - only check for generic array when no initializer, since also
// checked inside initializer resolution
TypeBinding leafComponentType = expectedType.leafComponentType();
if (!leafComponentType.isReifiable()) {
scope.problemReporter().illegalGenericArray(leafComponentType, this);
}
}
this.resolvedType = this.binding = (ArrayBinding) expectedType;
if (this.expressions == null) return this.binding;
TypeBinding elementType = this.binding.elementsType();
for (int i = 0, length = this.expressions.length; i < length; i++) {
Expression expression = this.expressions[i];
expression.setExpectedType(elementType);
TypeBinding expressionType =
expression instanceof ArrayInitializer
? expression.resolveTypeExpecting(scope, elementType)
: expression.resolveType(scope);
if (expressionType == null) continue;
// Compile-time conversion required?
if (elementType
!= expressionType) // must call before computeConversion() and typeMismatchError()
scope.compilationUnitScope().recordTypeConversion(elementType, expressionType);
if (expression.isConstantValueOfTypeAssignableToType(expressionType, elementType)
|| expressionType.isCompatibleWith(elementType)) {
expression.computeConversion(scope, elementType, expressionType);
} else if (scope.isBoxingCompatibleWith(expressionType, elementType)
|| (expressionType.isBaseType() // narrowing then boxing ?
&& scope.compilerOptions().sourceLevel >= ClassFileConstants.JDK1_5 // autoboxing
&& !elementType.isBaseType()
&& expression.isConstantValueOfTypeAssignableToType(
expressionType, scope.environment().computeBoxingType(elementType)))) {
expression.computeConversion(scope, elementType, expressionType);
} else {
scope.problemReporter().typeMismatchError(expressionType, elementType, expression, null);
}
}
return this.binding;
}
// infer initializer type for error reporting based on first element
TypeBinding leafElementType = null;
int dim = 1;
if (this.expressions == null) {
leafElementType = scope.getJavaLangObject();
} else {
Expression expression = this.expressions[0];
while (expression != null && expression instanceof ArrayInitializer) {
dim++;
Expression[] subExprs = ((ArrayInitializer) expression).expressions;
if (subExprs == null) {
leafElementType = scope.getJavaLangObject();
expression = null;
break;
}
expression = ((ArrayInitializer) expression).expressions[0];
}
if (expression != null) {
leafElementType = expression.resolveType(scope);
}
// fault-tolerance - resolve other expressions as well
for (int i = 1, length = this.expressions.length; i < length; i++) {
expression = this.expressions[i];
if (expression != null) {
expression.resolveType(scope);
}
}
}
if (leafElementType != null) {
this.resolvedType = scope.createArrayType(leafElementType, dim);
if (expectedType != null)
scope.problemReporter().typeMismatchError(this.resolvedType, expectedType, this, null);
}
return null;
}
