This post is the last post in the series of design patterns.
the post will describe why and how to use the interpreter design pattern and will
have a C# example of how to implement the pattern.
You can read my previous posts about design patterns here:
Template method pattern
Chain of responsibility pattern
The interpreter design pattern enables the reading and interpreting
of instruction that are written in a specific purpose language or notation.
The interpreter uses the representation of the grammar of the language
in order to interpret the language instructions.
Using the pattern can cause a performance issue.
Use Cases for the Interpreter Pattern
You should use the pattern in the following cases:
- You have a grammar for a language that isn’t large and complicated.
- Performance isn’t an issue in the application.
- You have a way to parse the grammar in an efficient way.
Example in C#
The following code is an example of how to implement the pattern:
The example is very simple and follows the instructions of the UML shown above.
The following code is an example scenario of how to run the pattern in
To sum up the post, I explained the interpreter design pattern in the post.
The pattern is rarely used and implies performance issues in the application.
I hope that you enjoyed the journey in the world of design patterns and that
the posts where helpful.
See you in the next posts in other development subjects.