+/*******************************************************************************
+ * 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;
-/**
- * @author Matthieu Casanova
- */
-public abstract class UnaryExpression extends OperatorExpression {
+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 Expression expression;
- public UnaryExpression(Expression expression, int operator, int sourceStart, int sourceEnd) {
- super(operator, sourceStart, sourceEnd);
- this.expression = expression;
- }
+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);
+ }
}
git://git.phpeclipse.com / phpeclipse.git / blobdiff