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package com.oracle.graal.python.nodes.function.builtins.clinic;

import static com.oracle.graal.python.nodes.ErrorMessages.S_MUST_BE_S_NOT_P;

import com.oracle.graal.python.annotations.ClinicConverterFactory;
import com.oracle.graal.python.builtins.PythonBuiltinClassType;
import com.oracle.graal.python.builtins.objects.PNone;
import com.oracle.graal.python.builtins.objects.common.SequenceStorageNodes;
import com.oracle.graal.python.builtins.objects.tuple.PTuple;
import com.oracle.graal.python.nodes.function.builtins.clinic.ArgumentCastNode.ArgumentCastNodeWithRaise;
import com.oracle.graal.python.util.PythonUtils;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Fallback;
import com.oracle.truffle.api.dsl.Specialization;

public abstract class TupleConversionNode extends ArgumentCastNodeWithRaise {
    @Specialization
    static Object[] doNone(@SuppressWarnings("unused") PNone none) {
        return PythonUtils.EMPTY_OBJECT_ARRAY;
    }

    @Specialization
    static Object[] doTuple(PTuple t,
                    @Cached SequenceStorageNodes.GetInternalObjectArrayNode getInternalArrayNode) {
        return getInternalArrayNode.execute(t.getSequenceStorage());
    }

    @Fallback
    Object doOthers(Object value) {
        throw raise(PythonBuiltinClassType.TypeError, S_MUST_BE_S_NOT_P, value, "tuple", value);
    }

    @ClinicConverterFactory
    public static TupleConversionNode create() {
        return TupleConversionNodeGen.create();
    }
}
