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Truffle SL is an example language implemented using the Truffle API.
/*
* Copyright (c) 2016, 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
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* 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,
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* SOFTWARE.
*/
package com.oracle.truffle.sl.runtime;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.interop.MessageResolution;
import com.oracle.truffle.api.interop.Resolve;
import com.oracle.truffle.api.interop.UnknownIdentifierException;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.api.object.Property;
import com.oracle.truffle.sl.SLLanguage;
import com.oracle.truffle.sl.nodes.access.SLReadPropertyCacheNode;
import com.oracle.truffle.sl.nodes.access.SLReadPropertyCacheNodeGen;
import com.oracle.truffle.sl.nodes.access.SLWritePropertyCacheNode;
import com.oracle.truffle.sl.nodes.access.SLWritePropertyCacheNodeGen;
import com.oracle.truffle.sl.nodes.call.SLDispatchNode;
import com.oracle.truffle.sl.nodes.call.SLDispatchNodeGen;
import com.oracle.truffle.sl.nodes.interop.SLForeignToSLTypeNode;
import com.oracle.truffle.sl.nodes.interop.SLForeignToSLTypeNodeGen;
/**
* The class containing all message resolution implementations of an SL object.
*/
@MessageResolution(receiverType = SLObjectType.class, language = SLLanguage.class)
public class SLObjectMessageResolution {
/*
* An SL object resolves the WRITE message and maps it to an object property write access.
*/
@Resolve(message = "WRITE")
public abstract static class SLForeignWriteNode extends Node {
@Child private SLMonomorphicNameWriteNode write;
public Object access(VirtualFrame frame, DynamicObject receiver, String name, Object value) {
if (write == null) {
CompilerDirectives.transferToInterpreterAndInvalidate();
write = insert(new SLMonomorphicNameWriteNode(name));
}
return write.execute(frame, receiver, name, value);
}
private abstract static class SLWriteNode extends Node {
@Child protected SLForeignToSLTypeNode toSLType = SLForeignToSLTypeNodeGen.create(null);
abstract Object execute(VirtualFrame frame, DynamicObject receiver, String name, Object value);
}
/*
* The write access speculates on a constant identifier.
*/
private static final class SLMonomorphicNameWriteNode extends SLWriteNode {
private final String cachedName;
@Child private SLWritePropertyCacheNode writePropertyCacheNode;
SLMonomorphicNameWriteNode(String name) {
this.cachedName = name;
this.writePropertyCacheNode = SLWritePropertyCacheNodeGen.create(name);
}
@Override
Object execute(VirtualFrame frame, DynamicObject receiver, String name, Object value) {
if (this.cachedName.equals(name)) {
Object convertedValue = toSLType.executeWithTarget(frame, value);
writePropertyCacheNode.executeObject(receiver, convertedValue);
return receiver;
} else {
CompilerDirectives.transferToInterpreterAndInvalidate();
return this.replace(new SLPolymorphicNameWriteNode()).execute(frame, receiver, name, value);
}
}
}
private static final class SLPolymorphicNameWriteNode extends SLWriteNode {
@Override
Object execute(VirtualFrame frame, DynamicObject receiver, String name, Object value) {
Object convertedValue = toSLType.executeWithTarget(frame, value);
Property property = receiver.getShape().getProperty(name);
return receiver.set(property.getKey(), convertedValue);
}
}
}
/*
* An SL object resolves the READ message and maps it to an object property read access.
*/
@Resolve(message = "READ")
public abstract static class SLForeignReadNode extends Node {
@Child private SLMonomorphicNameReadNode read;
public Object access(DynamicObject receiver, String name) {
if (read == null) {
CompilerDirectives.transferToInterpreterAndInvalidate();
read = insert(new SLMonomorphicNameReadNode(name));
}
return read.execute(receiver, name);
}
private abstract static class SLReadNode extends Node {
abstract Object execute(DynamicObject receiver, String name);
}
/*
* The write access speculates on a constant identifier.
*/
private static final class SLMonomorphicNameReadNode extends SLReadNode {
private final String name;
@Child private SLReadPropertyCacheNode readPropertyCacheNode;
SLMonomorphicNameReadNode(String name) {
this.name = name;
this.readPropertyCacheNode = SLReadPropertyCacheNodeGen.create(name);
}
@Override
Object execute(DynamicObject receiver, String n) {
if (this.name.equals(n)) {
return readPropertyCacheNode.executeObject(receiver);
} else {
CompilerDirectives.transferToInterpreterAndInvalidate();
return this.replace(new SLPolymorphicNameReadNode()).execute(receiver, n);
}
}
}
private static final class SLPolymorphicNameReadNode extends SLReadNode {
@Override
Object execute(DynamicObject obj, String name) {
Property property = obj.getShape().getProperty(name);
return obj.get(property.getKey());
}
}
}
/*
* An SL object resolves the INVOKE message and maps it to an object property read access
* followed by an function invocation. The object property must be an SL function object, which
* is executed eventually.
*/
@Resolve(message = "INVOKE")
public abstract static class SLForeignInvokeNode extends Node {
@Child private SLDispatchNode dispatch = SLDispatchNodeGen.create();
public Object access(VirtualFrame frame, DynamicObject receiver, String name, Object[] arguments) {
Object property = receiver.get(name);
if (property instanceof SLFunction) {
SLFunction function = (SLFunction) property;
Object[] arr = new Object[arguments.length];
// Before the arguments can be used by the SLFunction, they need to be converted to
// SL
// values.
for (int i = 0; i < arguments.length; i++) {
arr[i] = SLContext.fromForeignValue(arguments[i]);
}
Object result = dispatch.executeDispatch(frame, function, arr);
return result;
} else {
throw UnknownIdentifierException.raise(name);
}
}
}
}
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