破碎建议确保简单分配

问题描述

你好，

我是CC的新手，并试图在本周末试一试。花了一些时间后，我开始理解它，并能够使用它。但是，我遇到了一些问题。

首先，我在看似简单的案例中遇到了建议 - 这表明非常合同我已经拥有：

 public class TestClass {public TestClass（）{//导致建议确保：//消息2 CodeContracts：建议确保：Contract.Ensures（ this.Count == 12）; C：\ Users\censored\src\ContractTest \TestClass.cs 8 ContractTest Contract.Ensures（this.Count == 12）; this.Count = 12; public int Count {get;私人集; public void Init（）{//导致建议确保：//消息1 CodeContracts：建议确保：Contract.Ensures（this.Count == 11）; C：\ Users\censored\src\ContractTest \TestClass.cs 25 ContractTest Contract.Ensures（this.Count == 11）; this.Count = 11; } [ContractInvariantMethod] private void Invariants（）{Contract.Invariant（this.Count> = 0）;在上面的例子中，我得到的唯一输出是我的评论中指出的两个，加上"Checked 11 assertions：11 correct"。我提出这个问题是因为我的下一个问题似乎表明合同提取存在问题.. 
 
 
在下面的例子中，它没有证明我的保险，即使很少有变化。发生了什么？
公共类TestClass {private object [] redHerring; public TestClass（）{Contract.Ensures（this.Count == 12）; //确保未经证实：this.Count == 12 TestClass.cs 17 Contract.Ensures（this.redHerring！= null）; this.Count = 12; this.redHerring =新对象[1]; public int Count {get;私人集; public void Init（）{Contract.Ensures（this.Count == 11）; this.Count = 11; } [ContractInvariantMethod] private void Invariants（）{Contract.Invariant（this.Count> = 0）; Contract.Invariant（this.redHerring！= null）; } 
 
 
这会导致以下输出：
 
  
  
  
  
 
建议确保：合约.Ensures（this.Count == 11）;  TestClass.cs  25 
 
建议确保：Contract.Ensures（this.Count == 12）;  TestClass.cs  10 
 
  
  
  
  
  
  
 
建议确保：Contract.Ensures（this.redHerring.Length == 1）;  TestClass.cs  10 
 
 
确保未经证实：this.Count == 12  TestClass.cs  17 
 
 
消息  8  CodeContracts：已检查17个断言：16个正确1个未知
 
  
 
因为我已经声明了一个数组初始化（我在Count init之后做了），它无法证明Count设置得当吗？
 
  
  
  
  
 
我正在使用Visual Studio 2010，CC 1.4.60317.12，Mode = Standard，警告级别= hi，推断和建议一切。
解决方案
 
 
Howdy,
I'm new to CC, and tried to give it a go this weekend. After having spent some time with it, i'm starting to understand it and be able to use it. However, I'm having some problems.
First, I'm having trouble with the suggestions in seemingly simple cases - it's suggesting the very contract I already have:
    public class TestClass    {        public TestClass()        {            // Causes a suggested ensures:            // Message	2	CodeContracts: Suggested ensures: Contract.Ensures(this.Count == 12);	C:\Users\censored\src\ContractTest\TestClass.cs	8	ContractTest            Contract.Ensures( this.Count == 12 );            this.Count = 12;        }        public int Count { get; private set; }        public void Init()        {            // Causes a suggested ensures:            // Message	1	CodeContracts: Suggested ensures: Contract.Ensures(this.Count == 11);	C:\Users\censored\src\ContractTest\TestClass.cs	25	ContractTest            Contract.Ensures( this.Count == 11 );                        this.Count = 11;        }        [ContractInvariantMethod]        private void Invariants()        {            Contract.Invariant( this.Count >= 0 );        }    }
In the above case, the only outputs I get are the two indicated in my comments, plus "Checked 11 assertions: 11 correct". I bring this up because it seems like my next problem is indicating a problem with contract extraction..
In the following case, it's failing to prove my Ensures, even though very little has changed. What's going on?
    public class TestClass    {        private object[] redHerring;        public TestClass()        {            Contract.Ensures( this.Count == 12 ); // ensures unproven: this.Count == 12 TestClass.cs 17                        Contract.Ensures( this.redHerring != null );            this.Count = 12;            this.redHerring = new object[1];        }        public int Count { get; private set; }        public void Init()        {            Contract.Ensures( this.Count == 11 );                        this.Count = 11;        }        [ContractInvariantMethod]        private void Invariants()        {            Contract.Invariant( this.Count >= 0 );            Contract.Invariant( this.redHerring != null );        }    }
This causes the following outputs:
Suggested ensures: Contract.Ensures(this.Count == 11); TestClass.cs 25
Suggested ensures: Contract.Ensures(this.Count == 12); TestClass.cs 10 
Suggested ensures: Contract.Ensures(this.redHerring.Length == 1); TestClass.cs 10
ensures unproven: this.Count == 12 TestClass.cs 17
Message 8 CodeContracts: Checked 17 assertions: 16 correct 1 unknown
Just because I've declared an array initialization (that i'm doing after the Count init), it can't prove that Count is set properly?
I'm using Visual Studio 2010, CC 1.4.60317.12, Mode = Standard, Warning level = hi, infer and suggest for everything.
 解决方案 

                        
这篇关于破碎建议确保简单分配的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！