aboutsummaryrefslogtreecommitdiff
path: root/src/jdk/nashorn/internal/ir/GetSplitState.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/jdk/nashorn/internal/ir/GetSplitState.java')
-rw-r--r--src/jdk/nashorn/internal/ir/GetSplitState.java70
1 files changed, 70 insertions, 0 deletions
diff --git a/src/jdk/nashorn/internal/ir/GetSplitState.java b/src/jdk/nashorn/internal/ir/GetSplitState.java
new file mode 100644
index 00000000..bf4a4c01
--- /dev/null
+++ b/src/jdk/nashorn/internal/ir/GetSplitState.java
@@ -0,0 +1,70 @@
+/*
+ * 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 java.util.function.Function;
+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(final Function<Symbol, Type> localVariableTypes) {
+ 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;
+ }
+}