FunctionScope.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
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package jdk.nashorn.internal.runtime;

/**
 * This is the base class for function scopes.  Subclasses of this class are
 * produced by the ObjectClassGenerator along with additional fields for storing
 * local vars.  The number of fields required is determined by ObjectCreator.
 *
 * The scope is also responsible for handling the var arg 'arguments' object,
 * though most of the access is via generated code.
 *
 * The constructor of this class is responsible for any function prologue
 * involving the scope.
 */
public class FunctionScope extends Scope {

    /** Area to store scope arguments. (public for access from scripts.) */
    public final ScriptObject arguments;

    /**
     * Constructor
     *
     * @param map         property map
     * @param callerScope caller scope
     * @param arguments   arguments
     */
    public FunctionScope(final PropertyMap map, final ScriptObject callerScope, final ScriptObject arguments) {
        super(callerScope, map);
        this.arguments = arguments;
    }

    /**
     * Constructor
     *
     * @param map         property map
     * @param callerScope caller scope
     */
    public FunctionScope(final PropertyMap map, final ScriptObject callerScope) {
        super(callerScope, map);
        this.arguments = null;
    }

    /**
     * Constructor
     *
     * @param map            property map
     * @param primitiveSpill primitive spill pool
     * @param objectSpill    reference spill pool
     */
    public FunctionScope(final PropertyMap map, final long[] primitiveSpill, final Object[] objectSpill) {
        super(map, primitiveSpill, objectSpill);
        this.arguments = null;
    }
}