Why are comments that start with "//!" colored blue in Qt Creator?

Question

Qt Creator normally colors comments green, but I saw blue colored comments in the Qt Examples, and Qt Creator seems to color every comment that starts with `//!` in blue. Here's an example screenshot: Is this some convention? What does the blue signify?

Accepted Answer

It's a Doxygen comment.

There are multiple styles:

Qt block comment:

```
/*!
... text ...
*/
```

Qt one-line comment:

```
//! ... one line of text ...
```

JavaDoc block comment:

```
/**
  * ... text ...
*/
```

JavaDoc one-line comment:

```
/// ... one line of text ...
```

Why are comments that start with "//!" colored blue in Qt Creator?

Solution

Problem