| /* |
| * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.tools.tree; |
| |
| import sun.tools.java.*; |
| import sun.tools.asm.Assembler; |
| import java.util.Hashtable; |
| |
| /** |
| * WARNING: The contents of this source file are not part of any |
| * supported API. Code that depends on them does so at its own risk: |
| * they are subject to change or removal without notice. |
| */ |
| public |
| class CommaExpression extends BinaryExpression { |
| /** |
| * constructor |
| */ |
| public CommaExpression(long where, Expression left, Expression right) { |
| super(COMMA, where, (right != null) ? right.type : Type.tVoid, left, right); |
| } |
| |
| /** |
| * Check void expression |
| */ |
| public Vset check(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp) { |
| vset = left.check(env, ctx, vset, exp); |
| vset = right.check(env, ctx, vset, exp); |
| return vset; |
| } |
| |
| /** |
| * Select the type |
| */ |
| void selectType(Environment env, Context ctx, int tm) { |
| type = right.type; |
| } |
| |
| /** |
| * Simplify |
| */ |
| Expression simplify() { |
| if (left == null) { |
| return right; |
| } |
| if (right == null) { |
| return left; |
| } |
| return this; |
| } |
| |
| /** |
| * Inline |
| */ |
| public Expression inline(Environment env, Context ctx) { |
| if (left != null) { |
| left = left.inline(env, ctx); |
| } |
| if (right != null) { |
| right = right.inline(env, ctx); |
| } |
| return simplify(); |
| } |
| public Expression inlineValue(Environment env, Context ctx) { |
| if (left != null) { |
| left = left.inline(env, ctx); |
| } |
| if (right != null) { |
| right = right.inlineValue(env, ctx); |
| } |
| return simplify(); |
| } |
| |
| /** |
| * Code |
| */ |
| int codeLValue(Environment env, Context ctx, Assembler asm) { |
| if (right == null) { |
| // throw an appropriate error |
| return super.codeLValue(env, ctx, asm); |
| } else { |
| // Fully code the left-hand side. Do the LValue part of the |
| // right-hand side now. The remainder will be done by codeLoad or |
| // codeStore |
| if (left != null) { |
| left.code(env, ctx, asm); |
| } |
| return right.codeLValue(env, ctx, asm); |
| } |
| } |
| |
| void codeLoad(Environment env, Context ctx, Assembler asm) { |
| // The left-hand part has already been handled by codeLValue. |
| |
| if (right == null) { |
| // throw an appropriate error |
| super.codeLoad(env, ctx, asm); |
| } else { |
| right.codeLoad(env, ctx, asm); |
| } |
| } |
| |
| void codeStore(Environment env, Context ctx, Assembler asm) { |
| // The left-hand part has already been handled by codeLValue. |
| if (right == null) { |
| // throw an appropriate error |
| super.codeStore(env, ctx, asm); |
| } else { |
| right.codeStore(env, ctx, asm); |
| } |
| } |
| |
| public void codeValue(Environment env, Context ctx, Assembler asm) { |
| if (left != null) { |
| left.code(env, ctx, asm); |
| } |
| right.codeValue(env, ctx, asm); |
| } |
| public void code(Environment env, Context ctx, Assembler asm) { |
| if (left != null) { |
| left.code(env, ctx, asm); |
| } |
| if (right != null) { |
| right.code(env, ctx, asm); |
| } |
| } |
| } |