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[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpeclipse / 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.phpeclipse.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 TypeBinding resolveType(BlockScope scope) {
35         // compute the real value, which must range its type's range
36
37         computeConstant();
38         if (constant == null) {
39                 scope.problemReporter().constantOutOfRange(this);
40                 constant = Constant.NotAConstant;
41                 return null;
42         }
43         this.resolvedType = literalType(scope);
44         return this.resolvedType;
45 }
46 public abstract char[] source() ;
47 }