/*
***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2006 Thomas E Enebo <enebo@acm.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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package org.jruby.parser;
import org.jruby.ast.AssignableNode;
import org.jruby.ast.LocalAsgnNode;
import org.jruby.ast.LocalVarNode;
import org.jruby.ast.Node;
import org.jruby.ast.VCallNode;
import org.jruby.lexer.yacc.ISourcePosition;
public class LocalStaticScope extends StaticScope {
private static final long serialVersionUID = 2204064248888411628L;
private static final String[] NO_NAMES = new String[0];
public LocalStaticScope(StaticScope enclosingScope) {
this(enclosingScope, NO_NAMES);
}
public LocalStaticScope(StaticScope enclosingScope, String[] names) {
super(enclosingScope, names);
setBackrefLastlineScope(true);
}
public StaticScope getLocalScope() {
return this;
}
public int isDefined(String name, int depth) {
return (depth << 16) | exists(name);
}
@Override
public boolean isArgumentScope() {
return true;
}
@Override
public void makeArgumentScope() {
// We blindly call this on any scope we encounter which is ok.
// define_method(:foo, &Kernel.method(:foo)) is typically where we see this.
}
/**
* @see org.jruby.parser.StaticScope#getAllNamesInScope()
*/
public String[] getAllNamesInScope() {
return getVariables();
}
public AssignableNode assign(ISourcePosition position, String name, Node value,
StaticScope topScope, int depth) {
int slot = exists(name);
// We can assign if we already have variable of that name here or we are the only
// scope in the chain (which Local scopes always are).
if (slot >= 0) {
//System.out.println("LASGN1: " + name + ", l: " + depth + ", i: " + slot);
// mark as captured if from containing scope
if (depth > 0) capture(slot);
return new LocalAsgnNode(position, name, ((depth << 16) | slot), value);
} else if (topScope == this) {
slot = addVariable(name);
//System.out.println("LASGN2: " + name + ", l: " + depth + ", i: " + slot);
return new LocalAsgnNode(position, name, slot , value);
}
// We know this is a block scope because a local scope cannot be within a local scope
// If topScope was itself it would have created a LocalAsgnNode above.
return ((BlockStaticScope) topScope).addAssign(position, name, value);
}
public Node declare(ISourcePosition position, String name, int depth) {
int slot = exists(name);
if (slot >= 0) {
// mark as captured if from containing scope
if (depth > 0) capture(slot);
//System.out.println("LVAR: " + name + ", l: " + depth + ", i: " + slot);
return new LocalVarNode(position, ((depth << 16) | slot), name);
}
return new VCallNode(position, name);
}
@Override
public String toString() {
return "LocalScope: " + super.toString();
}
}