/// <summary>
/// Initializes a new instance of the <see cref="ZincVarDeclItem"/> class with a given <see cref="ZincTypeInstExprAndIdent"/>
/// that describes the name and the type of the variable and optionally a <see cref="IZincExp"/> instance that describes
/// the value that must be assigned to the variable.
/// </summary>
/// <param name="tia">A <see cref="ZincTypeInstExprAndIdent"/> instance that describes the name and type of the variable.</param>
/// <param name="exp">An <see cref="IZincExp"/> instance that describes the value assigned to the variable.</param>
public ZincVarDeclItem(ZincTypeInstExprAndIdent tia, IZincExp exp) : this(tia, null, exp)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="ZincVarDeclItem"/> class with a given <see cref="ZincTypeInstExprAndIdent"/>
/// that describes the variable and type to initialize, a <see cref="ZincAnnotation"/> instance that annotates the declaration
/// and optionally an <see cref="IZincExp"/> instance that describes the value that must be assigned.
/// </summary>
/// <param name="tia">A type-identifier tuple that describes the name and the type of the variable.</param>
/// <param name="anns">The annotations of the variable declaration.</param>
/// <param name="exp">Optionally, an expression that assigns a value to the variable.</param>
public ZincVarDeclItem(ZincTypeInstExprAndIdent tia, ZincAnnotations anns = null, IZincExp exp = null) : base(anns, exp, tia)
{
this.TypeInstExprAndIdent.Ident.Usage = ZincIdentUsage.GlobalVariable;
}