/*
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 * 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
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package sun.tools.tree;

import sun.tools.java.*;
import sun.tools.asm.Assembler;
import sun.tools.asm.Label;
import java.io.PrintStream;
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.
/** * 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 ContinueStatement extends Statement { Identifier lbl;
Constructor
/** * Constructor */
public ContinueStatement(long where, Identifier lbl) { super(CONTINUE, where); this.lbl = lbl; }
Check statement
/** * Check statement */
Vset check(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp) { checkLabel(env, ctx); reach(env, vset); // A new context is established here because the 'continue' statement // itself may be labelled, however erroneously. A 'CheckContext' must // be used here, as 'getContinueContext' is expected to return one. CheckContext destctx = (CheckContext)new CheckContext(ctx, this).getContinueContext(lbl); if (destctx != null) { switch (destctx.node.op) { case FOR: case DO: case WHILE: if (destctx.frameNumber != ctx.frameNumber) { env.error(where, "branch.to.uplevel", lbl); } destctx.vsContinue = destctx.vsContinue.join(vset); break; default: env.error(where, "invalid.continue"); } } else { if (lbl != null) { env.error(where, "label.not.found", lbl); } else { env.error(where, "invalid.continue"); } } CheckContext exitctx = ctx.getTryExitContext(); if (exitctx != null) { exitctx.vsTryExit = exitctx.vsTryExit.join(vset); } return DEAD_END; }
The cost of inlining this statement
/** * The cost of inlining this statement */
public int costInline(int thresh, Environment env, Context ctx) { return 1; }
Code
/** * Code */
public void code(Environment env, Context ctx, Assembler asm) { CodeContext destctx = (CodeContext)ctx.getContinueContext(lbl); codeFinally(env, ctx, asm, destctx, null); asm.add(where, opc_goto, destctx.contLabel); }
Print
/** * Print */
public void print(PrintStream out, int indent) { super.print(out, indent); out.print("continue"); if (lbl != null) { out.print(" " + lbl); } out.print(";"); } }