Introduction

According to one of expression templates inventors, Todd Veldhuizen, expression templates are “new C++ technique for passing expressions as functions arguments” [1]. The purpose of expression template is to inline expressions during compilation, which produces faster and arguably more readable code. Most of expression template articles focus on numeric array classes and operations on those using expression template techniques. For instance, expression templates could be utilized for matrix multiplication without using temporaries. For such article and code examples, please refer to articles referenced under [1] and [2].

As probably suspected, this article will not focus on expression templates as applied on numeric array classes. In this article, the focus will be on parsing and language recognition using expression template techniques. Furthermore the article will focus on Spirit library [3], a parser framework implemented completely using expression templates and template meta-programming. At this point the reader is encouraged to refer to introductory part of Spirit documentation as found here http://www.boost.org/libs/spirit/doc/introduction.html.

In addition it is important to note that this article will not focus on all parts of Spirit framework. This article is rather attempt to explain fundamentals behind expression templates as applied in Spirit framework.
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Introduction

Authentication and authorization is one of the basic components of web application development. When I first started web development, I quickly realized that authentication and authorization of resources were performed in variety of ways. Throughout years, I developed variety of web applications, primarily for my own use. With arrival of ASP.NET 1.0, authentication and authorization were simplified. ASP.NET 2.0 takes this feature even further by providing the user with powerful tools to quickly implement authentication and authorization. With these tools, a user can utilize MS SQL 2005 Server, XML data source, MS Access database and other data sources to retrieve user information. In this article I will focus on bare minimum needed to implement forms authentication using access database.

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