net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/Literal.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.compiler.ast;
  12
  13 import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
  14 import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
  15 import net.sourceforge.phpdt.internal.compiler.impl.Constant;
  16 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  17 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
  18
  19
  20 public abstract class Literal extends Expression {
  21
  22 public Literal(int s,int e) {
  23         sourceStart = s ;
  24         sourceEnd= e;
  25 }
  26
  27 public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
  28         return flowInfo;
  29 }
  30
  31 public abstract void computeConstant() ;
  32         //ON ERROR constant STAYS NULL
  33 public abstract TypeBinding literalType(BlockScope scope);
  34 public StringBuffer printExpression(int indent, StringBuffer output){
  35
  36                 return output.append(source());
  37          }
  38 public TypeBinding resolveType(BlockScope scope) {
  39         // compute the real value, which must range its type's range
  40
  41         computeConstant();
  42         if (constant == null) {
  43                 scope.problemReporter().constantOutOfRange(this);
  44                 constant = Constant.NotAConstant;
  45                 return null;
  46         }
  47         this.resolvedType = literalType(scope);
  48         return this.resolvedType;
  49 }
  50 public abstract char[] source() ;
  51 }