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static private BoundsCannotBeLessThanOne ( string paramName ) : |
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/// <summary>
/// Creates a <see cref="NewArrayExpression"/> that represents creating an array that has a specified rank.
/// </summary>
/// <param name="type">A <see cref="System.Type"/> that represents the element type of the array.</param>
/// <param name="bounds">An <see cref="IEnumerable{T}"/> that contains <see cref="Expression"/> objects to use to populate the <see cref="NewArrayExpression.Expressions"/> collection.</param>
/// <returns>A <see cref="NewArrayExpression"/> that has the <see cref="NodeType"/> property equal to <see cref="ExpressionType.NewArrayBounds"/> and the <see cref="NewArrayExpression.Expressions"/> property set to the specified value.</returns>
public static NewArrayExpression NewArrayBounds(Type type, IEnumerable <Expression> bounds)
{
ContractUtils.RequiresNotNull(type, nameof(type));
ContractUtils.RequiresNotNull(bounds, nameof(bounds));
if (type == typeof(void))
{
throw Error.ArgumentCannotBeOfTypeVoid(nameof(type));
}
TypeUtils.ValidateType(type, nameof(type));
if (type.IsByRef)
{
throw Error.TypeMustNotBeByRef(nameof(type));
}
if (type.IsPointer)
{
throw Error.TypeMustNotBePointer(nameof(type));
}
ReadOnlyCollection <Expression> boundsList = bounds.ToReadOnly();
int dimensions = boundsList.Count;
if (dimensions <= 0)
{
throw Error.BoundsCannotBeLessThanOne(nameof(bounds));
}
for (int i = 0; i < dimensions; i++)
{
Expression expr = boundsList[i];
RequiresCanRead(expr, nameof(bounds), i);
if (!TypeUtils.IsInteger(expr.Type))
{
throw Error.ArgumentMustBeInteger(nameof(bounds), i);
}
}
Type arrayType;
if (dimensions == 1)
{
//To get a vector, need call Type.MakeArrayType().
//Type.MakeArrayType(1) gives a non-vector array, which will cause type check error.
arrayType = type.MakeArrayType();
}
else
{
arrayType = type.MakeArrayType(dimensions);
}
return(NewArrayExpression.Make(ExpressionType.NewArrayBounds, arrayType, bounds.ToReadOnly()));
}
/// <summary>
/// Creates a <see cref="NewArrayExpression"/> that represents creating an array that has a specified rank.
/// </summary>
/// <param name="type">A <see cref="Type"/> that represents the element type of the array.</param>
/// <param name="bounds">An IEnumerable{T} that contains Expression objects to use to populate the Expressions collection.</param>
/// <returns>A <see cref="NewArrayExpression"/> that has the <see cref="P:NodeType"/> property equal to type and the <see cref="P:Expressions"/> property set to the specified value.</returns>
public static NewArrayExpression NewArrayBounds(Type type, IEnumerable <Expression> bounds)
{
ContractUtils.RequiresNotNull(type, "type");
ContractUtils.RequiresNotNull(bounds, "bounds");
if (type == typeof(void))
{
throw Error.ArgumentCannotBeOfTypeVoid();
}
var boundsList = bounds.ToReadOnly();
var dimensions = boundsList.Count;
if (dimensions <= 0)
{
throw Error.BoundsCannotBeLessThanOne();
}
for (var i = 0; i < dimensions; i++)
{
var expr = boundsList[i];
RequiresCanRead(expr, "bounds");
if (!expr.Type.IsInteger())
{
throw Error.ArgumentMustBeInteger();
}
}
Type arrayType;
if (dimensions == 1)
{
//To get a vector, need call Type.MakeArrayType().
//Type.MakeArrayType(1) gives a non-vector array, which will cause type check error.
arrayType = type.MakeArrayType();
}
else
{
arrayType = type.MakeArrayType(dimensions);
}
return(NewArrayExpression.Make(ExpressionType.NewArrayBounds, arrayType, boundsList));
}
public static NewMultidimensionalArrayInitCSharpExpression NewMultidimensionalArrayInit(Type type, IEnumerable <int> bounds, IEnumerable <Expression> initializers)
{
ContractUtils.RequiresNotNull(type, nameof(type));
ContractUtils.RequiresNotNull(bounds, nameof(bounds));
ContractUtils.RequiresNotNull(initializers, nameof(initializers));
if (type.Equals(typeof(void)))
{
throw LinqError.ArgumentCannotBeOfTypeVoid();
}
var boundsList = bounds.ToReadOnly();
int dimensions = boundsList.Count;
if (dimensions <= 0)
{
throw LinqError.BoundsCannotBeLessThanOne();
}
var length = 1;
foreach (var bound in boundsList)
{
if (bound < 0)
{
throw Error.BoundCannotBeLessThanZero();
}
checked
{
length *= bound;
}
}
var initializerList = initializers.ToReadOnly();
if (initializerList.Count != length)
{
throw Error.ArrayBoundsElementCountMismatch();
}
var newList = default(Expression[]);
for (int i = 0, n = initializerList.Count; i < n; i++)
{
var expr = initializerList[i];
RequiresCanRead(expr, nameof(initializers));
if (!TypeUtils.AreReferenceAssignable(type, expr.Type))
{
if (!TryQuote(type, ref expr))
{
throw LinqError.ExpressionTypeCannotInitializeArrayType(expr.Type, type);
}
if (newList == null)
{
newList = new Expression[initializerList.Count];
for (int j = 0; j < i; j++)
{
newList[j] = initializerList[j];
}
}
}
if (newList != null)
{
newList[i] = expr;
}
}
if (newList != null)
{
initializerList = new TrueReadOnlyCollection <Expression>(newList);
}
return(new NewMultidimensionalArrayInitCSharpExpression(type.MakeArrayType(boundsList.Count), boundsList, initializerList));
}
