X-Git-Url: http://git.phpeclipse.com diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/UnaryExpression.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/UnaryExpression.java index fff7021..81ed939 100644 --- a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/UnaryExpression.java +++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/UnaryExpression.java @@ -1,14 +1,301 @@ +/******************************************************************************* + * 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 class UnaryExpression extends OperatorExpression { - public UnaryExpression(Expression expression, int operator, int sourceStart, int sourceEnd) { - super(operator, sourceStart, sourceEnd); - this.expression = expression; - } + 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 : + // // ! + // // 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 : + // // - + // 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); + } }