SLPrintlnBuiltin.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * The Universal Permissive License (UPL), Version 1.0
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 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
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 * the Larger Works (as defined below), to deal in both
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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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package com.oracle.truffle.sl.builtins;

import java.io.PrintWriter;

import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.nodes.NodeInfo;
import com.oracle.truffle.sl.runtime.SLContext;

/**
 * Builtin function to write a value to the {@link SLContext#getOutput() standard output}. The
 * different specialization leverage the typed {@code println} methods available in Java, i.e.,
 * primitive values are printed without converting them to a {@link String} first.
 * <p>
 * Printing involves a lot of Java code, so we need to tell the optimizing system that it should not
 * unconditionally inline everything reachable from the println() method. This is done via the
 * {@link TruffleBoundary} annotations.
 */
@NodeInfo(shortName = "println")
public abstract class SLPrintlnBuiltin extends SLBuiltinNode {

    @Specialization
    public long println(long value) {
        doPrint(getContext().getOutput(), value);
        return value;
    }

    @TruffleBoundary
    private static void doPrint(PrintWriter out, long value) {
        out.println(value);
    }

    @Specialization
    public boolean println(boolean value) {
        doPrint(getContext().getOutput(), value);
        return value;
    }

    @TruffleBoundary
    private static void doPrint(PrintWriter out, boolean value) {
        out.println(value);
    }

    @Specialization
    public String println(String value) {
        doPrint(getContext().getOutput(), value);
        return value;
    }

    @TruffleBoundary
    private static void doPrint(PrintWriter out, String value) {
        out.println(value);
    }

    @Specialization
    public Object println(Object value) {
        doPrint(getContext().getOutput(), value);
        return value;
    }

    @TruffleBoundary
    private static void doPrint(PrintWriter out, Object value) {
        out.println(value);
    }
}