/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;
import org.eclipse.jdt.internal.compiler.env.AccessRestriction;
import org.eclipse.jdt.internal.compiler.impl.*;
import org.eclipse.jdt.internal.compiler.lookup.*;
import org.eclipse.jdt.internal.compiler.ASTVisitor;
public abstract class ASTNode implements BaseTypes, CompilerModifiers, TypeConstants, TypeIds {
public int sourceStart, sourceEnd;
//some global provision for the hierarchy
public final static Constant NotAConstant = Constant.NotAConstant;
// storage for internal flags (32 bits) BIT USAGE
public final static int Bit1 = 0x1; // return type (operator) | name reference kind (name ref) | add assertion (type decl) | useful empty statement (empty statement)
public final static int Bit2 = 0x2; // return type (operator) | name reference kind (name ref) | has local type (type, method, field decl)
public final static int Bit3 = 0x4; // return type (operator) | name reference kind (name ref) | implicit this (this ref)
public final static int Bit4 = 0x8; // return type (operator) | first assignment to local (local decl) | undocumented empty block (block, type and method decl)
public final static int Bit5 = 0x10; // value for return (expression) | has all method bodies (unit) | supertype ref (type ref)
public final static int Bit6 = 0x20; // depth (name ref, msg) | only value required (binary expression) | ignore need cast check (cast expression)
public final static int Bit7 = 0x40; // depth (name ref, msg) | operator (operator) | need runtime checkcast (cast expression)
public final static int Bit8 = 0x80; // depth (name ref, msg) | operator (operator)
public final static int Bit9 = 0x100; // depth (name ref, msg) | operator (operator) | is local type (type decl)
public final static int Bit10= 0x200; // depth (name ref, msg) | operator (operator) | is anonymous type (type decl)
public final static int Bit11 = 0x400; // depth (name ref, msg) | operator (operator) | is member type (type decl)
public final static int Bit12 = 0x800; // depth (name ref, msg) | operator (operator)
public final static int Bit13 = 0x1000; // depth (name ref, msg)
public final static int Bit14 = 0x2000; // strictly assigned (reference lhs)
public final static int Bit15 = 0x4000; // is unnecessary cast (expression)
public final static int Bit16 = 0x8000; // in javadoc comment (name ref, type ref, msg)
public final static int Bit17 = 0x10000; // compound assigned (reference lhs)
public final static int Bit18 = 0x20000;
public final static int Bit19 = 0x40000;
public final static int Bit20 = 0x80000;
public final static int Bit21 = 0x100000;
public final static int Bit22 = 0x200000; // parenthesis count (expression)
public final static int Bit23 = 0x400000; // parenthesis count (expression)
public final static int Bit24 = 0x800000; // parenthesis count (expression)
public final static int Bit25 = 0x1000000; // parenthesis count (expression)
public final static int Bit26 = 0x2000000; // parenthesis count (expression)
public final static int Bit27 = 0x4000000; // parenthesis count (expression)
public final static int Bit28 = 0x8000000; // parenthesis count (expression)
public final static int Bit29 = 0x10000000; // parenthesis count (expression)
public final static int Bit30 = 0x20000000; // assignment with no effect (assignment) | elseif (if statement)
public final static int Bit31 = 0x40000000; // local declaration reachable (local decl)
public final static int Bit32 = 0x80000000; // reachable (statement)
public final static long Bit32L = 0x80000000L;
public final static long Bit33L = 0x100000000L;
public final static long Bit34L = 0x200000000L;
public final static long Bit35L = 0x400000000L;
public final static long Bit36L = 0x800000000L;
public final static long Bit37L = 0x1000000000L;
public final static long Bit38L = 0x2000000000L;
public final static long Bit39L = 0x4000000000L;
public final static long Bit40L = 0x8000000000L;
public int bits = IsReachableMASK; // reachable by default
// for operators
public static final int ReturnTypeIDMASK = Bit1|Bit2|Bit3|Bit4;
public static final int OperatorSHIFT = 6; // Bit7 -> Bit12
public static final int OperatorMASK = Bit7|Bit8|Bit9|Bit10|Bit11|Bit12; // 6 bits for operator ID
// for binary expressions
public static final int ValueForReturnMASK = Bit5;
public static final int OnlyValueRequiredMASK = Bit6;
// for cast expressions
public static final int UnnecessaryCastMask = Bit15;
public static final int NeedRuntimeCheckCastMASK = Bit7;
public static final int IgnoreNeedForCastCheckMASK = Bit6;
// for name references
public static final int RestrictiveFlagMASK = Bit1|Bit2|Bit3;
public static final int FirstAssignmentToLocalMASK = Bit4;
// for this reference
public static final int IsImplicitThisMask = Bit3;
// for single name references
public static final int DepthSHIFT = 5; // Bit6 -> Bit13
public static final int DepthMASK = Bit6|Bit7|Bit8|Bit9|Bit10|Bit11|Bit12|Bit13; // 8 bits for actual depth value (max. 255)
// for statements
public static final int IsReachableMASK = Bit32;
public static final int IsLocalDeclarationReachableMASK = Bit31;
// for type declaration
public static final int AddAssertionMASK = Bit1;
public static final int IsLocalTypeMASK = Bit9;
public static final int IsAnonymousTypeMASK = Bit10; // used to test for anonymous
public static final int AnonymousAndLocalMask = IsAnonymousTypeMASK | IsLocalTypeMASK; // used to set anonymous marker
public static final int IsMemberTypeMASK = Bit11; // local member do not know it is local at parse time (need to look at binding)
// for type, method and field declarations
public static final int HasLocalTypeMASK = Bit2; // cannot conflict with AddAssertionMASK
// for expression
public static final int ParenthesizedSHIFT = 21; // Bit22 -> Bit29
public static final int ParenthesizedMASK = Bit22|Bit23|Bit24|Bit25|Bit26|Bit27|Bit28|Bit29; // 8 bits for parenthesis count value (max. 255)
// for assignment
public static final int IsAssignmentWithNoEffectMASK = Bit30;
// for references on lhs of assignment
public static final int IsStrictlyAssignedMASK = Bit14; // set only for true assignments, as opposed to compound ones
public static final int IsCompoundAssignedMASK = Bit17; // set only for compound assignments, as opposed to other ones
// for empty statement
public static final int IsUsefulEmptyStatementMASK = Bit1;
// for block and method declaration
public static final int UndocumentedEmptyBlockMASK = Bit4;
// for compilation unit
public static final int HasAllMethodBodies = Bit5;
// for references in Javadoc comments
public static final int InsideJavadoc = Bit16;
// for if statement
public static final int IsElseIfStatement = Bit30;
// for type reference
public static final int IsSuperType = Bit5;
public ASTNode() {
super();
}
public static boolean checkInvocationArgument(BlockScope scope, Expression argument, TypeBinding parameterType, TypeBinding argumentType) {
argument.computeConversion(scope, parameterType, argumentType);
if (argumentType != NullBinding && parameterType.isWildcard() && ((WildcardBinding) parameterType).kind != Wildcard.SUPER)
return true; // unsafeWildcardInvocation
if (argumentType != parameterType && argumentType.isRawType())
if (parameterType.isBoundParameterizedType() || parameterType.isGenericType())
scope.problemReporter().unsafeRawConversion(argument, argumentType, parameterType);
return false;
}
public static void checkInvocationArguments(BlockScope scope, Expression receiver, TypeBinding receiverType, MethodBinding method, Expression[] arguments, TypeBinding[] argumentTypes, boolean argsContainCast, InvocationSite invocationSite) {
boolean unsafeWildcardInvocation = false;
TypeBinding[] params = method.parameters;
if (method.isVarargs()) {
// 4 possibilities exist for a call to the vararg method foo(int i, long ... value) : foo(1), foo(1, 2), foo(1, 2, 3, 4) & foo(1, new long[] {1, 2})
int lastIndex = params.length - 1;
for (int i = 0; i < lastIndex; i++)
if (checkInvocationArgument(scope, arguments[i], params[i], argumentTypes[i]))
unsafeWildcardInvocation = true;
int argLength = arguments.length;
if (lastIndex < argLength) { // vararg argument was provided
TypeBinding parameterType = params[lastIndex];
if (params.length != argLength || parameterType.dimensions() != argumentTypes[lastIndex].dimensions())
parameterType = ((ArrayBinding) parameterType).elementsType(); // single element was provided for vararg parameter
for (int i = lastIndex; i < argLength; i++)
if (checkInvocationArgument(scope, arguments[i], parameterType, argumentTypes[i]))
unsafeWildcardInvocation = true;
}
} else {
for (int i = 0, argLength = arguments.length; i < argLength; i++)
if (checkInvocationArgument(scope, arguments[i], params[i], argumentTypes[i]))
unsafeWildcardInvocation = true;
}
if (argsContainCast) {
CastExpression.checkNeedForArgumentCasts(scope, receiver, receiverType, method, arguments, argumentTypes, invocationSite);
}
if (unsafeWildcardInvocation) {
scope.problemReporter().wildcardInvocation((ASTNode)invocationSite, receiverType, method, argumentTypes);
} else if (receiverType.isRawType() && method.hasSubstitutedParameters()) {
scope.problemReporter().unsafeRawInvocation((ASTNode)invocationSite, receiverType, method);
}
}
public ASTNode concreteStatement() {
return this;
}
/* Answer true if the field use is considered deprecated.
* An access in the same compilation unit is allowed.
*/
public final boolean isFieldUseDeprecated(FieldBinding field, Scope scope, boolean isStrictlyAssigned) {
if (!isStrictlyAssigned && field.isPrivate() && !scope.isDefinedInField(field)) {
// ignore cases where field is used from within inside itself
field.modifiers |= AccPrivateUsed;
}
if (!field.isViewedAsDeprecated()) return false;
// inside same unit - no report
if (scope.isDefinedInSameUnit(field.declaringClass)) return false;
// if context is deprecated, may avoid reporting
if (!scope.environment().options.reportDeprecationInsideDeprecatedCode && scope.isInsideDeprecatedCode()) return false;
return true;
}
public boolean isImplicitThis() {
return false;
}
/* Answer true if the method use is considered deprecated.
* An access in the same compilation unit is allowed.
*/
public final boolean isMethodUseDeprecated(MethodBinding method, Scope scope) {
if (method.isPrivate() && !scope.isDefinedInMethod(method)) {
// ignore cases where method is used from within inside itself (e.g. direct recursions)
method.original().modifiers |= AccPrivateUsed;
}
if (!method.isViewedAsDeprecated()) return false;
// inside same unit - no report
if (scope.isDefinedInSameUnit(method.declaringClass)) return false;
// if context is deprecated, may avoid reporting
if (!scope.environment().options.reportDeprecationInsideDeprecatedCode && scope.isInsideDeprecatedCode()) return false;
return true;
}
public boolean isSuper() {
return false;
}
public boolean isThis() {
return false;
}
/* 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;
if (refType.isPrivate() && !scope.isDefinedInType(refType)) {
// ignore cases where type is used from within inside itself
((ReferenceBinding)refType.erasure()).modifiers |= AccPrivateUsed;
}
if (refType.hasRestrictedAccess()) {
AccessRestriction restriction = scope.environment().getAccessRestriction(type);
if (restriction != null) {
scope.problemReporter().forbiddenReference(type, this, restriction.getMessageTemplate());
}
}
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.environment().options.reportDeprecationInsideDeprecatedCode && scope.isInsideDeprecatedCode()) return false;
return true;
}
public abstract StringBuffer print(int indent, StringBuffer output);
public static StringBuffer printIndent(int indent, StringBuffer output) {
for (int i = indent; i > 0; i--) output.append(" "); //$NON-NLS-1$
return output;
}
public static StringBuffer printModifiers(int modifiers, StringBuffer output) {
if ((modifiers & AccPublic) != 0)
output.append("public "); //$NON-NLS-1$
if ((modifiers & AccPrivate) != 0)
output.append("private "); //$NON-NLS-1$
if ((modifiers & AccProtected) != 0)
output.append("protected "); //$NON-NLS-1$
if ((modifiers & AccStatic) != 0)
output.append("static "); //$NON-NLS-1$
if ((modifiers & AccFinal) != 0)
output.append("final "); //$NON-NLS-1$
if ((modifiers & AccSynchronized) != 0)
output.append("synchronized "); //$NON-NLS-1$
if ((modifiers & AccVolatile) != 0)
output.append("volatile "); //$NON-NLS-1$
if ((modifiers & AccTransient) != 0)
output.append("transient "); //$NON-NLS-1$
if ((modifiers & AccNative) != 0)
output.append("native "); //$NON-NLS-1$
if ((modifiers & AccAbstract) != 0)
output.append("abstract "); //$NON-NLS-1$
return output;
}
public int sourceStart() {
return this.sourceStart;
}
public int sourceEnd() {
return this.sourceEnd;
}
public String toString() {
return print(0, new StringBuffer(30)).toString();
}
public void traverse(ASTVisitor visitor, BlockScope scope) {
// do nothing by default
}
}
