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104 lines
3.7 KiB
Java
104 lines
3.7 KiB
Java
/*
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* @(#) $(JCGO)/jtrsrc/com/ivmaisoft/jcgo/CaseStatement.java --
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* a part of JCGO translator.
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**
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* Project: JCGO (http://www.ivmaisoft.com/jcgo/)
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* Copyright (C) 2001-2012 Ivan Maidanski <ivmai@mail.ru>
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* All rights reserved.
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*/
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/*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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**
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* This software is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License (GPL) for more details.
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**
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* Linking this library statically or dynamically with other modules is
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* making a combined work based on this library. Thus, the terms and
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* conditions of the GNU General Public License cover the whole
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* combination.
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**
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* As a special exception, the copyright holders of this library give you
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* permission to link this library with independent modules to produce an
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* executable, regardless of the license terms of these independent
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* modules, and to copy and distribute the resulting executable under
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* terms of your choice, provided that you also meet, for each linked
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* independent module, the terms and conditions of the license of that
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* module. An independent module is a module which is not derived from
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* or based on this library. If you modify this library, you may extend
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* this exception to your version of the library, but you are not
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* obligated to do so. If you do not wish to do so, delete this
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* exception statement from your version.
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*/
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package com.ivmaisoft.jcgo;
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/**
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* Grammar production for the switch case statement.
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**
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* Formats: DEFAULT COLON [BlockStatements] CASE ConstantExpression COLON
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* [BlockStatements]
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*/
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final class CaseStatement extends LexNode {
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CaseStatement(Term c) {
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super(Empty.newTerm(), c);
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}
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CaseStatement(Term b, Term d) {
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super(b, d);
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}
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void processPass1(Context c) {
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BranchContext oldBranch = c.saveBranch();
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if (terms[0].notEmpty()) {
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terms[0].processPass1(c);
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int s0 = terms[0].exprType().objectSize();
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if (s0 < Type.BYTE || s0 > Type.INT) {
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fatalError(c, "Illegal type of switch expression");
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}
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if (!terms[0].isLiteral()
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&& !terms[0].isJavaConstant(c.currentClass)) {
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fatalError(c, "Case expression must be constant");
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}
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}
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boolean oldHasBreakSimple = c.hasBreakSimple;
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c.hasBreakSimple = false;
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boolean oldHasBreakDeep = c.hasBreakDeep;
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c.hasBreakDeep = false;
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boolean oldHasContinueSimple = c.hasContinueSimple;
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c.hasContinueSimple = false;
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boolean oldHasContinueDeep = c.hasContinueDeep;
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c.hasContinueDeep = false;
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terms[1].processPass1(c);
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if (!c.hasBreakSimple && !c.hasBreakDeep && !c.hasContinueSimple
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&& !c.hasContinueDeep && terms[1].hasTailReturnOrThrow()) {
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c.swapBranch(oldBranch);
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} else {
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c.intersectBranch(oldBranch);
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}
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c.hasBreakSimple = oldHasBreakSimple;
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c.hasContinueSimple |= oldHasContinueSimple;
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c.hasContinueDeep |= oldHasContinueDeep;
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c.hasBreakDeep |= oldHasBreakDeep;
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}
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void processOutput(OutputContext oc) {
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if (terms[0].notEmpty()) {
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terms[0].requireLiteral();
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oc.cPrint(" case ");
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terms[0].processOutput(oc);
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} else {
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oc.cPrint(" default");
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}
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oc.cPrint(":");
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terms[1].processOutput(oc);
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}
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}
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