/
NQPScopeWithFrame.java
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/
NQPScopeWithFrame.java
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/*
* Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
* copyright rights in the Software, and any and all patent rights owned or
* freely licensable by each licensor hereunder covering either (i) the
* unmodified Software as contributed to or provided by such licensor, or (ii)
* the Larger Works (as defined below), to deal in both
*
* (a) the Software, and
*
* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
* is contributed by such licensors),
*
* without restriction, including without limitation the rights to copy, create
* derivative works of, display, perform, and distribute the Software and make,
* use, sell, offer for sale, import, export, have made, and have sold the
* Software and the Larger Work(s), and to sublicense the foregoing rights on
* either these or other terms.
*
* This license is subject to the following condition:
*
* The above copyright notice and either this complete permission notice or at a
* minimum a reference to the UPL must be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.perl6.nqp.truffle;
import org.perl6.nqp.truffle.runtime.NQPCodeRef;
import org.perl6.nqp.truffle.runtime.HLL;
import com.oracle.truffle.api.frame.FrameDescriptor;
import com.oracle.truffle.api.frame.FrameSlotKind;
import com.oracle.truffle.api.frame.FrameSlot;
public class NQPScopeWithFrame extends NQPScope {
static class ContextSlot {
public static final ContextSlot SINGLETON = new ContextSlot();
private ContextSlot() {}
}
static class NQPLocalVariable {
final String name;
NQPLocalVariable(String name) {
this.name = name;
}
public int hashCode() {
return name.hashCode();
}
public boolean equals(Object obj) {
if (obj instanceof NQPLocalVariable) {
return ((NQPLocalVariable) obj).name.equals(name);
} else {
return false;
}
}
}
private final FrameDescriptor frameDescriptor;
private final NQPScope outer;
public NQPScopeWithFrame(FrameDescriptor frameDescriptor, NQPScope outer) {
this.frameDescriptor = frameDescriptor;
this.outer = outer;
}
public FrameSlot addLexical(String name) {
return frameDescriptor.addFrameSlot(name, FrameSlotKind.Object);
}
@Override
public FoundLexical findLexical(String name, int depth) {
FrameSlot found = frameDescriptor.findFrameSlot(name);
if (found == null) {
if (outer != null) {
return outer.findLexical(name, depth + 1);
} else {
throw new RuntimeException("Can't find lexical: " + name);
}
}
return new FoundLexical(found, depth);
}
@Override
public FrameSlot addLocal(String name) {
return frameDescriptor.addFrameSlot(new NQPLocalVariable(name), FrameSlotKind.Object);
}
@Override
public FrameSlot findLocal(String name) {
FrameSlot found = frameDescriptor.findFrameSlot(new NQPLocalVariable(name));
if (found == null) {
throw new RuntimeException("Can't find local: " + name);
}
return found;
}
public FrameDescriptor getFrameDescriptor() {
return frameDescriptor;
}
@Override
public FrameSlot getContextSlot() {
return frameDescriptor.findOrAddFrameSlot(ContextSlot.SINGLETON, FrameSlotKind.Object);
}
@Override
public HLL getCurrentHLL() {
if (outer != null) {
return outer.getCurrentHLL();
} else {
throw new RuntimeException("Can't get current HLL");
}
}
@Override
public GlobalContext getGlobalContext() {
if (outer != null) {
return outer.getGlobalContext();
} else {
throw new RuntimeException("Can't get HLLs");
}
}
@Override
public NQPCodeRef getCuid(String cuid) {
if (outer != null) {
return outer.getCuid(cuid);
} else {
throw new RuntimeException("Can't get cuid");
}
}
@Override
public void addCuid(String cuid, NQPCodeRef codeRef) {
if (outer != null) {
outer.addCuid(cuid, codeRef);
} else {
throw new RuntimeException("Can't add cuid");
}
}
}