面向切面编程

aims to increase modularity by allowing the separation of cross-cutting concerns.
- 几乎所有的编程思想都涉及代码功能的分类，将各个关注点（Concern）封装成独立的抽象模块（如函数、过程、模块、类以及方法等），后者又可供进一步实现、封装和重写。
- 部分关注点“横切”程序代码中的数个模块，即在多个模块中都有出现，它们即被称作横切关注点（Cross-cutting concerns, Horizontal concerns）

Support

.NET Framework languages (c# / VB.NET)
- PostSharp is a commercial AOP implementation with a free but limited edition.
- Unity provides an API to facilitate proven practices in core areas of programming including data access, security, logging, exception handling and others.
ActionScript
Ada
AutoHotkey
C / C++
COBOL
The Cocoa Objective-C frameworks
ColdFusion
Common Lisp
Delphi
Delphi Prism
e (IEEE 1647)
Emacs Lisp
Groovy
Haskell
Java
AspectJ
JavaScript
Logtalk
Lua
make
Matlab
ML
Nemerle
Perl
PHP
Prolog
Python
Racket
Ruby
Squeak Smalltalk
UML 2.0
XML