| /* |
| * 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.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. |
| */ |
| public |
| class ThrowStatement extends Statement { |
| Expression expr; |
| |
| /** |
| * Constructor |
| */ |
| public ThrowStatement(long where, Expression expr) { |
| super(THROW, where); |
| this.expr = expr; |
| } |
| |
| /** |
| * Check statement |
| */ |
| Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) { |
| checkLabel(env, ctx); |
| try { |
| vset = reach(env, vset); |
| expr.checkValue(env, ctx, vset, exp); |
| if (expr.type.isType(TC_CLASS)) { |
| ClassDeclaration c = env.getClassDeclaration(expr.type); |
| if (exp.get(c) == null) { |
| exp.put(c, this); |
| } |
| ClassDefinition def = c.getClassDefinition(env); |
| ClassDeclaration throwable = |
| env.getClassDeclaration(idJavaLangThrowable); |
| if (!def.subClassOf(env, throwable)) { |
| env.error(where, "throw.not.throwable", def); |
| } |
| expr = convert(env, ctx, Type.tObject, expr); |
| } else if (!expr.type.isType(TC_ERROR)) { |
| env.error(expr.where, "throw.not.throwable", expr.type); |
| } |
| } catch (ClassNotFound e) { |
| env.error(where, "class.not.found", e.name, opNames[op]); |
| } |
| CheckContext exitctx = ctx.getTryExitContext(); |
| if (exitctx != null) { |
| exitctx.vsTryExit = exitctx.vsTryExit.join(vset); |
| } |
| return DEAD_END; |
| } |
| |
| /** |
| * Inline |
| */ |
| public Statement inline(Environment env, Context ctx) { |
| expr = expr.inlineValue(env, ctx); |
| return this; |
| } |
| |
| /** |
| * Create a copy of the statement for method inlining |
| */ |
| public Statement copyInline(Context ctx, boolean valNeeded) { |
| ThrowStatement s = (ThrowStatement)clone(); |
| s.expr = expr.copyInline(ctx); |
| return s; |
| } |
| |
| /** |
| * The cost of inlining this statement |
| */ |
| public int costInline(int thresh, Environment env, Context ctx) { |
| return 1 + expr.costInline(thresh, env, ctx); |
| } |
| |
| /** |
| * Code |
| */ |
| public void code(Environment env, Context ctx, Assembler asm) { |
| expr.codeValue(env, ctx, asm); |
| asm.add(where, opc_athrow); |
| } |
| |
| /** |
| * Print |
| */ |
| public void print(PrintStream out, int indent) { |
| super.print(out, indent); |
| out.print("throw "); |
| expr.print(out); |
| out.print(":"); |
| } |
| } |