# Templating

Class templating is a feature commonly found in type-oriented programming languages like TypeScript or C++. While class templating is sometimes seen as having limited applications, it allows the creation of type-flexible classes that significantly reduces repetitive code.

Templating in Lua++ is quite simple and efficient. It works like so: `tag` where `T` is a type. To allow more than one type, one would separate each type name with a comma, such as: `tag<T1, T2, ...>`. A simple example of templating is shown below:

```typescript
class Pair<T1, T2> {
  first: T1,
  second: T2,
  
  implicit constructor(f: T1, s: T2)
    self.first, self.second = f, s
  end
}

local pair: Pair<number, string> = { 3, "Three" }
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.luaplusplus.org/language-improvements/classes/templating.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.