/// <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)); }