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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.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Cached.Shared;
import com.oracle.truffle.api.dsl.GenerateCached;
import com.oracle.truffle.api.dsl.GenerateInline;
import com.oracle.truffle.api.dsl.GenerateUncached;
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.nodes.Node;
import com.oracle.truffle.api.strings.TruffleString;
import com.oracle.truffle.sl.SLLanguage;
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;
import com.oracle.truffle.sl.runtime.SLStrings;
/**
* 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)
@GenerateUncached
@GenerateInline
@GenerateCached(false)
public abstract class SLToTruffleStringNode extends Node {
static final int LIMIT = 5;
private static final TruffleString TRUE = SLStrings.constant("true");
private static final TruffleString FALSE = SLStrings.constant("false");
private static final TruffleString FOREIGN_OBJECT = SLStrings.constant("[foreign object]");
public abstract TruffleString execute(Node node, Object value);
@Specialization
protected static TruffleString fromNull(@SuppressWarnings("unused") SLNull value) {
return SLStrings.NULL;
}
@Specialization
protected static TruffleString fromString(String value,
// TruffleString nodes cannot be inlined yet
@Shared("fromJava") @Cached(inline = false) TruffleString.FromJavaStringNode fromJavaStringNode) {
return fromJavaStringNode.execute(value, SLLanguage.STRING_ENCODING);
}
@Specialization
protected static TruffleString fromTruffleString(TruffleString value) {
return value;
}
@Specialization
protected static TruffleString fromBoolean(boolean value) {
return value ? TRUE : FALSE;
}
@Specialization
@TruffleBoundary
protected static TruffleString fromLong(long value,
@Shared("fromLong") @Cached(inline = false) TruffleString.FromLongNode fromLongNode) {
return fromLongNode.execute(value, SLLanguage.STRING_ENCODING, true);
}
@Specialization
@TruffleBoundary
protected static TruffleString fromBigNumber(SLBigInteger value,
@Shared("fromJava") @Cached(inline = false) TruffleString.FromJavaStringNode fromJavaStringNode) {
return fromJavaStringNode.execute(value.toString(), SLLanguage.STRING_ENCODING);
}
@Specialization
protected static TruffleString fromFunction(SLFunction value) {
return value.getName();
}
@Specialization(limit = "LIMIT")
protected static TruffleString fromInterop(Object value,
@CachedLibrary("value") InteropLibrary interop,
@Shared("fromLong") @Cached(inline = false) TruffleString.FromLongNode fromLongNode,
@Shared("fromJava") @Cached(inline = false) TruffleString.FromJavaStringNode fromJavaStringNode) {
try {
if (interop.fitsInLong(value)) {
return fromLongNode.execute(interop.asLong(value), SLLanguage.STRING_ENCODING, true);
} else if (interop.isString(value)) {
return fromJavaStringNode.execute(interop.asString(value), SLLanguage.STRING_ENCODING);
} else if (interop.isNumber(value) && value instanceof SLBigInteger) {
return fromJavaStringNode.execute(bigNumberToString((SLBigInteger) value), SLLanguage.STRING_ENCODING);
} else if (interop.isNull(value)) {
return SLStrings.NULL_LC;
} else {
return FOREIGN_OBJECT;
}
} catch (UnsupportedMessageException e) {
throw shouldNotReachHere(e);
}
}
@TruffleBoundary
private static String bigNumberToString(SLBigInteger value) {
return value.toString();
}
}
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