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Truffle SL is an example language implemented using the Truffle API.
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/*
* Copyright (c) 2015, 2022, 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
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*/
package com.oracle.truffle.sl.nodes.util;
import static com.oracle.truffle.api.CompilerDirectives.shouldNotReachHere;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.dsl.TypeSystemReference;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
import com.oracle.truffle.api.library.CachedLibrary;
import com.oracle.truffle.api.strings.TruffleString;
import com.oracle.truffle.sl.SLLanguage;
import com.oracle.truffle.sl.nodes.SLExpressionNode;
import com.oracle.truffle.sl.nodes.SLTypes;
import com.oracle.truffle.sl.runtime.SLBigInteger;
import com.oracle.truffle.sl.runtime.SLFunction;
import com.oracle.truffle.sl.runtime.SLNull;
/**
* The node to normalize any value to an SL value. This is useful to reduce the number of values
* expression nodes need to expect.
*/
@TypeSystemReference(SLTypes.class)
@NodeChild
public abstract class SLUnboxNode extends SLExpressionNode {
static final int LIMIT = 5;
@Specialization
protected static TruffleString fromString(String value,
@Cached TruffleString.FromJavaStringNode fromJavaStringNode) {
return fromJavaStringNode.execute(value, SLLanguage.STRING_ENCODING);
}
@Specialization
protected static TruffleString fromTruffleString(TruffleString value) {
return value;
}
@Specialization
protected static boolean fromBoolean(boolean value) {
return value;
}
@Specialization
protected static long fromLong(long value) {
return value;
}
@Specialization
protected static SLBigInteger fromBigNumber(SLBigInteger value) {
return value;
}
@Specialization
protected static SLFunction fromFunction(SLFunction value) {
return value;
}
@Specialization
protected static SLNull fromFunction(SLNull value) {
return value;
}
@Specialization(limit = "LIMIT")
public static Object fromForeign(Object value, @CachedLibrary("value") InteropLibrary interop) {
try {
if (interop.fitsInLong(value)) {
return interop.asLong(value);
} else if (interop.fitsInBigInteger(value)) {
return value;
} else if (interop.fitsInDouble(value)) {
return (long) interop.asDouble(value);
} else if (interop.isString(value)) {
return interop.asTruffleString(value);
} else if (interop.isBoolean(value)) {
return interop.asBoolean(value);
} else {
return value;
}
} catch (UnsupportedMessageException e) {
throw shouldNotReachHere(e);
}
}
}
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