ContractClassForAttribute(Type) Constructor

Definition

Namespace:

System.Diagnostics.Contracts

Assembly:

System.Diagnostics.Contracts.dll

Source:

Contracts.cs

Initializes a new instance of the ContractClassForAttribute class, specifying the type the current class is a contract for.

public:
 ContractClassForAttribute(Type ^ typeContractsAreFor);

public ContractClassForAttribute (Type typeContractsAreFor);

new System.Diagnostics.Contracts.ContractClassForAttribute : Type -> System.Diagnostics.Contracts.ContractClassForAttribute

Public Sub New (typeContractsAreFor As Type)

Parameters

typeContractsAreFor

Type

The type the current class is a contract for.

Remarks

The following example shows how to use the ContractClassAttribute constructor to specify that the contracts in the type apply to the IArray interface. This code example is part of a larger example provided for the ContractClassAttribute class.

[ContractClassFor(typeof(IArray))]
internal abstract class IArrayContract : IArray
{
    int IArray.Add(Object value)
    {
        // Returns the index in which an item was inserted.
        Contract.Ensures(Contract.Result<int>() >= -1);
        Contract.Ensures(Contract.Result<int>() < ((IArray)this).Count);
        return default(int);
    }
    Object IArray.this[int index]
    {
        get
        {
            Contract.Requires(index >= 0);
            Contract.Requires(index < ((IArray)this).Count);
            return default(int);
        }
        set
        {
            Contract.Requires(index >= 0);
            Contract.Requires(index < ((IArray)this).Count);
        }
    }
    public int Count
    {
        get
        {
            Contract.Requires(Count >= 0);
            Contract.Requires(Count <= ((IArray)this).Count);
            return default(int);
        }
    }

    void IArray.Clear()
    {
        Contract.Ensures(((IArray)this).Count == 0);
    }

    void IArray.Insert(int index, Object value)
    {
        Contract.Requires(index >= 0);
        Contract.Requires(index <= ((IArray)this).Count);  // For inserting immediately after the end.
        Contract.Ensures(((IArray)this).Count == Contract.OldValue(((IArray)this).Count) + 1);
    }

    void IArray.RemoveAt(int index)
    {
        Contract.Requires(index >= 0);
        Contract.Requires(index < ((IArray)this).Count);
        Contract.Ensures(((IArray)this).Count == Contract.OldValue(((IArray)this).Count) - 1);
    }
}