Trailing return types是C++11关于函数声明的语言特性之一,旨在解决模版编程遇到的语法相关的问题,先看一个简单例子,感受一下什么是trailing return types: C++03: int func(int i, int j); C++11可以写成: auto func(int i, int j) -> int; 最直观感受就是,函数返回类型声明后置. 新的声明方式配合模版,可以使编译器自动推导模版函数的返回类型,使模版函数更泛化,例如: C++03: templa…

In C++03, the return type of a function template cannot be generalized if the return type relies on those of the template arguments. Here is an example, mul(T a, T b) is a function template that calculates the product of a and b. Arguments a and b ar…

Async methods have three possible return types: Task<TResult>, Task, and void. The Task<TResult> return type is used for an async method that contains a return (C#) statement in which the operand has type TResult. The Result property is a bloc…

1.使用dbml映射数据库,添加存储过程到dbml文件时报错. 2.原因:存储过程中使用了临时表 3.解决方案 3.1 通过自定义表值变量实现 Ex: DECLARE @TempTable TABLE ( AttributeID INT, Value NVARCHAR(200) ) INSERT INTO @TempTable Select * from Attribute OR --Execute SP and insert results into @TempTable INSERT INT…

Background C++ is one of the main development languages used by many of Google's open-source projects. As every C++ programmer knows, the language has many powerful features, but this power brings with it complexity, which in turn can make code more…

引言: 在iOS开发过程中, 我们可能会碰到一些系统方法弃用, weak.循环引用.不能执行之类的警告. 有代码洁癖的孩子们很想消除他们, 今天就让我们来一次Fuck 警告!! 首先学会基本的语句: #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wdeprecated-declarations" 中间这里写出现警告的代码 #pragma clang diagnostic pop 这样就消除了方法弃用的警…

Warning Message -WCFString-literal input conversion stopped due to an input byte that does not belong to the input codeset UTF-8 -WNSObject-attribute __attribute ((NSObject)) may be put on a typedef only, attribute is ignored -Wabstract-vbase-init in…

这篇博客的内容都是记的网上的.是流水账.只是记录下来以便日后之有,避免每次重新google. #pragma除了可以用来把不同功能的代码进行分隔组织外还可以用来disable一些warnings.这在引入一些第三方带有warnings的库的时候很有用. #pragma用处:http://nshipster.com/pragma/ #Clang Diagnostics: http://nshipster.com/clang-diagnostics/ Clang warning strings和fl…

0. 摘要 近期读了一些关于C++11标准的材料. 本篇博客将从新标准的优点.与旧版本的区别和使用方法三个角度,大致介绍我对C++11的认识. C++11标准,原名C++0x, 是03版旧标准的更新.总结来说,新标准给我更加接近脚本语言的感觉.move语义的支持.auto关键字自动类型等新特性,使得C++11在性能和效率上比旧版本有更大优势. 我参考的博客和网页有: http://www.csdn.net/article/2012-05-15/2805585 http://stackoverfl…

Semantic Warnings Warning Message -WCFString-literal input conversion stopped due to an input byte that does not belong to the input codeset UTF-8 -WNSObject-attribute         __attribute ((NSObject)) may be put on a typedef only, attribute is ignore…