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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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 * 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,
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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 CompoundStatement extends Statement { Statement args[];
Constructor
/** * Constructor */
public CompoundStatement(long where, Statement args[]) { super(STAT, where); this.args = args; // To avoid the need for subsequent null checks: for (int i = 0 ; i < args.length ; i++) { if (args[i] == null) { args[i] = new CompoundStatement(where, new Statement[0]); } } }
Insert a new statement at the front. This is used to introduce an implicit super-class constructor call.
/** * Insert a new statement at the front. * This is used to introduce an implicit super-class constructor call. */
public void insertStatement(Statement s) { Statement newargs[] = new Statement[1+args.length]; newargs[0] = s; for (int i = 0 ; i < args.length ; i++) { newargs[i+1] = args[i]; } this.args = newargs; }
Check statement
/** * Check statement */
Vset check(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp) { checkLabel(env, ctx); if (args.length > 0) { vset = reach(env, vset); CheckContext newctx = new CheckContext(ctx, this); // In this environment, 'resolveName' will look for local classes. Environment newenv = Context.newEnvironment(env, newctx); for (int i = 0 ; i < args.length ; i++) { vset = args[i].checkBlockStatement(newenv, newctx, vset, exp); } vset = vset.join(newctx.vsBreak); } return ctx.removeAdditionalVars(vset); }
Inline
/** * Inline */
public Statement inline(Environment env, Context ctx) { ctx = new Context(ctx, this); boolean expand = false; int count = 0; for (int i = 0 ; i < args.length ; i++) { Statement s = args[i]; if (s != null) { if ((s = s.inline(env, ctx)) != null) { if ((s.op == STAT) && (s.labels == null)) { count += ((CompoundStatement)s).args.length; } else { count++; } expand = true; } args[i] = s; } } switch (count) { case 0: return null; case 1: for (int i = args.length ; i-- > 0 ;) { if (args[i] != null) { return eliminate(env, args[i]); } } break; } if (expand || (count != args.length)) { Statement newArgs[] = new Statement[count]; for (int i = args.length ; i-- > 0 ;) { Statement s = args[i]; if (s != null) { if ((s.op == STAT) && (s.labels == null)) { Statement a[] = ((CompoundStatement)s).args; for (int j = a.length ; j-- > 0 ; ) { newArgs[--count] = a[j]; } } else { newArgs[--count] = s; } } } args = newArgs; } return this; }
Create a copy of the statement for method inlining
/** * Create a copy of the statement for method inlining */
public Statement copyInline(Context ctx, boolean valNeeded) { CompoundStatement s = (CompoundStatement)clone(); s.args = new Statement[args.length]; for (int i = 0 ; i < args.length ; i++) { s.args[i] = args[i].copyInline(ctx, valNeeded); } return s; }
The cost of inlining this statement
/** * The cost of inlining this statement */
public int costInline(int thresh, Environment env, Context ctx) { int cost = 0; for (int i = 0 ; (i < args.length) && (cost < thresh) ; i++) { cost += args[i].costInline(thresh, env, ctx); } return cost; }
Code
/** * Code */
public void code(Environment env, Context ctx, Assembler asm) { CodeContext newctx = new CodeContext(ctx, this); for (int i = 0 ; i < args.length ; i++) { args[i].code(env, newctx, asm); } asm.add(newctx.breakLabel); }
Check if the first thing is a constructor invocation
/** * Check if the first thing is a constructor invocation */
public Expression firstConstructor() { return (args.length > 0) ? args[0].firstConstructor() : null; }
Print
/** * Print */
public void print(PrintStream out, int indent) { super.print(out, indent); out.print("{\n"); for (int i = 0 ; i < args.length ; i++) { printIndent(out, indent+1); if (args[i] != null) { args[i].print(out, indent + 1); } else { out.print("<empty>"); } out.print("\n"); } printIndent(out, indent); out.print("}"); } }