src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/ir/GetSplitState.java
changeset 47216 71c04702a3d5
parent 28130 433d6755c5f8
child 48380 597f69e5f1e3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/ir/GetSplitState.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2014, 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 jdk.nashorn.internal.ir;
+
+import jdk.nashorn.internal.codegen.CompilerConstants;
+import jdk.nashorn.internal.codegen.types.Type;
+import jdk.nashorn.internal.ir.visitor.NodeVisitor;
+import jdk.nashorn.internal.runtime.Scope;
+
+/**
+ * Synthetic AST node that represents loading of the scope object and invocation of the {@link Scope#getSplitState()}
+ * method on it. It has no JavaScript source representation and only occurs in synthetic functions created by
+ * the split-into-functions transformation.
+ */
+public final class GetSplitState extends Expression {
+    private static final long serialVersionUID = 1L;
+
+    /** The sole instance of this AST node. */
+    public final static GetSplitState INSTANCE = new GetSplitState();
+
+    private GetSplitState() {
+        super(NO_TOKEN, NO_FINISH);
+    }
+
+    @Override
+    public Type getType() {
+        return Type.INT;
+    }
+
+    @Override
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
+        return visitor.enterGetSplitState(this) ? visitor.leaveGetSplitState(this) : this;
+    }
+
+    @Override
+    public void toString(final StringBuilder sb, final boolean printType) {
+        if (printType) {
+            sb.append("{I}");
+        }
+        sb.append(CompilerConstants.SCOPE.symbolName()).append('.').append(Scope.GET_SPLIT_STATE.name()).append("()");
+    }
+
+    private Object readResolve() {
+        return INSTANCE;
+    }
+}