+/*******************************************************************************
+ * Copyright (c) 2000, 2003 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 net.sourceforge.phpdt.internal.compiler.ast;
-import java.util.List;
-
-/**
- * @author Matthieu Casanova
- */
-public abstract class UnaryExpression extends OperatorExpression {
-
- public Expression expression;
-
- public UnaryExpression(final Expression expression, final int operator, final int sourceStart, final int sourceEnd) {
- super(operator, sourceStart, sourceEnd);
- this.expression = expression;
- }
-
- /**
- * Get the variables from outside (parameters, globals ...)
- */
- public void getOutsideVariable(final List list) {
- }
-
- /**
- * get the modified variables.
- */
- public void getModifiedVariable(final List list) {
- expression.getModifiedVariable(list);
- }
-
- /**
- * Get the variables used.
- */
- public void getUsedVariable(final List list) {
- expression.getUsedVariable(list);
- }
+import net.sourceforge.phpdt.internal.compiler.ASTVisitor;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
+import net.sourceforge.phpdt.internal.compiler.impl.Constant;
+import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
+import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
+
+public class UnaryExpression extends OperatorExpression {
+
+ public Expression expression;
+
+ public Constant optimizedBooleanConstant;
+
+ public UnaryExpression(Expression expression, int operator) {
+ this.expression = expression;
+ this.bits |= operator << OperatorSHIFT; // encode operator
+ }
+
+ public FlowInfo analyseCode(BlockScope currentScope,
+ FlowContext flowContext, FlowInfo flowInfo) {
+
+ if (((bits & OperatorMASK) >> OperatorSHIFT) == NOT) {
+ return this.expression.analyseCode(currentScope, flowContext,
+ flowInfo).asNegatedCondition();
+ } else {
+ return this.expression.analyseCode(currentScope, flowContext,
+ flowInfo);
+ }
+ }
+
+ public Constant optimizedBooleanConstant() {
+
+ return this.optimizedBooleanConstant == null ? this.constant
+ : this.optimizedBooleanConstant;
+ }
+
+ /**
+ * Code generation for an unary operation
+ *
+ * @param currentScope
+ * net.sourceforge.phpdt.internal.compiler.lookup.BlockScope
+ * @param codeStream
+ * net.sourceforge.phpdt.internal.compiler.codegen.CodeStream
+ * @param valueRequired
+ * boolean
+ */
+ // public void generateCode(
+ // BlockScope currentScope,
+ // CodeStream codeStream,
+ // boolean valueRequired) {
+ //
+ // int pc = codeStream.position;
+ // Label falseLabel, endifLabel;
+ // if (this.constant != Constant.NotAConstant) {
+ // // inlined value
+ // if (valueRequired) {
+ // codeStream.generateConstant(this.constant, this.implicitConversion);
+ // }
+ // codeStream.recordPositionsFrom(pc, this.sourceStart);
+ // return;
+ // }
+ // switch ((bits & OperatorMASK) >> OperatorSHIFT) {
+ // case NOT :
+ // switch (this.expression.implicitConversion >> 4) /* runtime type */ {
+ // case T_boolean :
+ // // ! <boolean>
+ // // Generate code for the condition
+ // this.expression.generateOptimizedBoolean(
+ // currentScope,
+ // codeStream,
+ // null,
+ // (falseLabel = new Label(codeStream)),
+ // valueRequired);
+ // if (valueRequired) {
+ // codeStream.iconst_0();
+ // if (falseLabel.hasForwardReferences()) {
+ // codeStream.goto_(endifLabel = new Label(codeStream));
+ // codeStream.decrStackSize(1);
+ // falseLabel.place();
+ // codeStream.iconst_1();
+ // endifLabel.place();
+ // }
+ // } else { // 6596: if (!(a && b)){} - must still place falseLabel
+ // falseLabel.place();
+ // }
+ // break;
+ // }
+ // break;
+ // case TWIDDLE :
+ // switch (this.expression.implicitConversion >> 4 /* runtime */
+ // ) {
+ // case T_int :
+ // // ~int
+ // this.expression.generateCode(currentScope, codeStream, valueRequired);
+ // if (valueRequired) {
+ // codeStream.iconst_m1();
+ // codeStream.ixor();
+ // }
+ // break;
+ // case T_long :
+ // this.expression.generateCode(currentScope, codeStream, valueRequired);
+ // if (valueRequired) {
+ // codeStream.ldc2_w(-1L);
+ // codeStream.lxor();
+ // }
+ // }
+ // break;
+ // case MINUS :
+ // // - <num>
+ // if (this.constant != NotAConstant) {
+ // if (valueRequired) {
+ // switch (this.expression.implicitConversion >> 4){ /* runtime */
+ // case T_int :
+ // codeStream.generateInlinedValue(this.constant.intValue() * -1);
+ // break;
+ // case T_float :
+ // codeStream.generateInlinedValue(this.constant.floatValue() * -1.0f);
+ // break;
+ // case T_long :
+ // codeStream.generateInlinedValue(this.constant.longValue() * -1L);
+ // break;
+ // case T_double :
+ // codeStream.generateInlinedValue(this.constant.doubleValue() * -1.0);
+ // }
+ // }
+ // } else {
+ // this.expression.generateCode(currentScope, codeStream, valueRequired);
+ // if (valueRequired) {
+ // switch (expression.implicitConversion >> 4){ /* runtime type */
+ // case T_int :
+ // codeStream.ineg();
+ // break;
+ // case T_float :
+ // codeStream.fneg();
+ // break;
+ // case T_long :
+ // codeStream.lneg();
+ // break;
+ // case T_double :
+ // codeStream.dneg();
+ // }
+ // }
+ // }
+ // break;
+ // case PLUS :
+ // this.expression.generateCode(currentScope, codeStream, valueRequired);
+ // }
+ // if (valueRequired) {
+ // codeStream.generateImplicitConversion(this.implicitConversion);
+ // }
+ // codeStream.recordPositionsFrom(pc, this.sourceStart);
+ // }
+ //
+ // /**
+ // * Boolean operator code generation
+ // * Optimized operations are: &&, ||, <, <=, >, >=, &, |, ^
+ // */
+ // public void generateOptimizedBoolean(
+ // BlockScope currentScope,
+ // CodeStream codeStream,
+ // Label trueLabel,
+ // Label falseLabel,
+ // boolean valueRequired) {
+ //
+ // if ((this.constant != Constant.NotAConstant) && (this.constant.typeID()
+ // == T_boolean)) {
+ // super.generateOptimizedBoolean(
+ // currentScope,
+ // codeStream,
+ // trueLabel,
+ // falseLabel,
+ // valueRequired);
+ // return;
+ // }
+ // if (((this.bits & OperatorMASK) >> OperatorSHIFT) == NOT) {
+ // this.expression.generateOptimizedBoolean(
+ // currentScope,
+ // codeStream,
+ // falseLabel,
+ // trueLabel,
+ // valueRequired);
+ // } else {
+ // super.generateOptimizedBoolean(
+ // currentScope,
+ // codeStream,
+ // trueLabel,
+ // falseLabel,
+ // valueRequired);
+ // }
+ // }
+ public TypeBinding resolveType(BlockScope scope) {
+
+ TypeBinding expressionType = this.expression.resolveType(scope);
+ if (expressionType == null) {
+ this.constant = NotAConstant;
+ return null;
+ }
+ int expressionId = expressionType.id;
+ if (expressionId > 15) {
+ this.constant = NotAConstant;
+ scope.problemReporter().invalidOperator(this, expressionType);
+ return null;
+ }
+
+ int tableId;
+ switch ((bits & OperatorMASK) >> OperatorSHIFT) {
+ case NOT:
+ tableId = AND_AND;
+ break;
+ case TWIDDLE:
+ tableId = LEFT_SHIFT;
+ break;
+ default:
+ tableId = MINUS;
+ } // + and - cases
+
+ // the code is an int
+ // (cast) left Op (cast) rigth --> result
+ // 0000 0000 0000 0000 0000
+ // <<16 <<12 <<8 <<4 <<0
+ int result = ResolveTypeTables[tableId][(expressionId << 4)
+ + expressionId];
+ this.expression.implicitConversion = result >>> 12;
+ this.bits |= result & 0xF;
+ switch (result & 0xF) { // only switch on possible result type.....
+ case T_boolean:
+ this.resolvedType = BooleanBinding;
+ break;
+ case T_byte:
+ this.resolvedType = ByteBinding;
+ break;
+ case T_char:
+ this.resolvedType = CharBinding;
+ break;
+ case T_double:
+ this.resolvedType = DoubleBinding;
+ break;
+ case T_float:
+ this.resolvedType = FloatBinding;
+ break;
+ case T_int:
+ this.resolvedType = IntBinding;
+ break;
+ case T_long:
+ this.resolvedType = LongBinding;
+ break;
+ default: // error........
+ this.constant = Constant.NotAConstant;
+ if (expressionId != T_undefined)
+ scope.problemReporter().invalidOperator(this, expressionType);
+ return null;
+ }
+ // compute the constant when valid
+ if (this.expression.constant != Constant.NotAConstant) {
+ this.constant = Constant.computeConstantOperation(
+ this.expression.constant, expressionId,
+ (bits & OperatorMASK) >> OperatorSHIFT);
+ } else {
+ this.constant = Constant.NotAConstant;
+ if (((bits & OperatorMASK) >> OperatorSHIFT) == NOT) {
+ Constant cst = expression.optimizedBooleanConstant();
+ if (cst != Constant.NotAConstant)
+ this.optimizedBooleanConstant = Constant.fromValue(!cst
+ .booleanValue());
+ }
+ }
+ return this.resolvedType;
+ }
+
+ public StringBuffer printExpressionNoParenthesis(int indent,
+ StringBuffer output) {
+
+ output.append(operatorToString()).append(' ');
+ return this.expression.printExpression(0, output);
+ }
+
+ public String toStringExpressionNoParenthesis() {
+
+ return operatorToString() + " " + this.expression.toStringExpression(); //$NON-NLS-1$
+ }
+
+ public void traverse(ASTVisitor visitor, BlockScope blockScope) {
+
+ if (visitor.visit(this, blockScope)) {
+ this.expression.traverse(visitor, blockScope);
+ }
+ visitor.endVisit(this, blockScope);
+ }
}
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