public TypeBinding resolveType(BlockScope scope) {
// due to syntax lhs may be only a NameReference, a FieldReference or an ArrayReference
this.constant = Constant.NotAConstant;
if (!(this.lhs instanceof Reference) || this.lhs.isThis()) {
scope.problemReporter().expressionShouldBeAVariable(this.lhs);
return null;
}
TypeBinding lhsType = lhs.resolveType(scope);
this.expression.setExpectedType(lhsType); // needed in case of generic method invocation
if (lhsType != null) {
this.resolvedType = lhsType.capture(scope, this.sourceEnd);
}
TypeBinding rhsType = this.expression.resolveType(scope);
if (lhsType == null || rhsType == null) {
return null;
}
// check for assignment with no effect
Binding left = getDirectBinding(this.lhs);
if (left != null && left == getDirectBinding(this.expression)) {
scope.problemReporter().assignmentHasNoEffect(this, left.shortReadableName());
}
// Compile-time conversion of base-types : implicit narrowing integer into byte/short/character
// may require to widen the rhs expression at runtime
if (lhsType != rhsType) { // must call before computeConversion() and typeMismatchError()
scope.compilationUnitScope().recordTypeConversion(lhsType, rhsType);
}
if ((this.expression.isConstantValueOfTypeAssignableToType(rhsType, lhsType)
|| (lhsType.isBaseType() && BaseTypeBinding.isWidening(lhsType.id, rhsType.id)))
|| rhsType.isCompatibleWith(lhsType)) {
this.expression.computeConversion(scope, lhsType, rhsType);
checkAssignment(scope, lhsType, rhsType);
if (this.expression instanceof CastExpression
&& (this.expression.bits & ASTNode.UnnecessaryCast) == 0) {
CastExpression.checkNeedForAssignedCast(scope, lhsType, (CastExpression) this.expression);
}
return this.resolvedType;
} else if (scope.isBoxingCompatibleWith(rhsType, lhsType)
|| (rhsType.isBaseType() // narrowing then boxing ?
&& scope.compilerOptions().sourceLevel >= ClassFileConstants.JDK1_5 // autoboxing
&& !lhsType.isBaseType()
&& this.expression.isConstantValueOfTypeAssignableToType(
rhsType, scope.environment().computeBoxingType(lhsType)))) {
this.expression.computeConversion(scope, lhsType, rhsType);
if (this.expression instanceof CastExpression
&& (this.expression.bits & ASTNode.UnnecessaryCast) == 0) {
CastExpression.checkNeedForAssignedCast(scope, lhsType, (CastExpression) this.expression);
}
return this.resolvedType;
}
scope.problemReporter().typeMismatchError(rhsType, lhsType, this.expression, this.lhs);
return lhsType;
}
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));
}
public TypeBinding resolveType(BlockScope scope) {
this.constant = Constant.NotAConstant;
TypeBinding expressionType = this.expression.resolveType(scope);
TypeBinding checkedType = this.type.resolveType(scope, true /* check bounds*/);
if (expressionType == null || checkedType == null) return null;
if (!checkedType.isReifiable()) {
scope.problemReporter().illegalInstanceOfGenericType(checkedType, this);
} else if ((expressionType != TypeBinding.NULL
&& expressionType.isBaseType()) // disallow autoboxing
|| !checkCastTypesCompatibility(scope, checkedType, expressionType, null)) {
scope.problemReporter().notCompatibleTypesError(this, expressionType, checkedType);
}
return this.resolvedType = TypeBinding.BOOLEAN;
}
/* Answer true if the type use is considered deprecated.
* An access in the same compilation unit is allowed.
*/
public final boolean isTypeUseDeprecated(TypeBinding type, Scope scope) {
if (type.isArrayType()) {
type = ((ArrayBinding) type).leafComponentType;
}
if (type.isBaseType()) return false;
ReferenceBinding refType = (ReferenceBinding) type;
// ignore references insing Javadoc comments
if ((this.bits & ASTNode.InsideJavadoc) == 0
&& refType.isOrEnclosedByPrivateType()
&& !scope.isDefinedInType(refType)) {
// ignore cases where type is used from inside itself
((ReferenceBinding) refType.erasure()).modifiers |= ExtraCompilerModifiers.AccLocallyUsed;
}
if (refType.hasRestrictedAccess()) {
AccessRestriction restriction = scope.environment().getAccessRestriction(type.erasure());
if (restriction != null) {
scope
.problemReporter()
.forbiddenReference(
type,
this,
restriction.classpathEntryType,
restriction.classpathEntryName,
restriction.getProblemId());
}
}
// force annotations resolution before deciding whether the type may be deprecated
refType.initializeDeprecatedAnnotationTagBits();
if (!refType.isViewedAsDeprecated()) return false;
// inside same unit - no report
if (scope.isDefinedInSameUnit(refType)) return false;
// if context is deprecated, may avoid reporting
if (!scope.compilerOptions().reportDeprecationInsideDeprecatedCode
&& scope.isInsideDeprecatedCode()) return false;
return true;
}
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;
}
