Configuration

By default, this filter won’t add style attributes to prevent undefined errors.

You can enable it by setting code-attribute field in metadata.

To add attributes to all classes, use:

code-attribute: true

To add attributes to specific classes, use:

code-attribute:
    - cpp

Example

This pandoc filter will add attributes to code blocks based on their classes.

For example, it can be very useful to use different styles for different language in listings :

---
code-attribute:
    - cpp
    - python
header-includes: |
    \usepackage{listings}
    \usepackage[usenames,dvipsnames]{color}

    \lstset{ % General settings
        numbers=left,
        numberstyle=\tiny
    }

    \lstdefinestyle{cpp}{ % Only for C++
        keywordstyle=\color{Green}
    }

    \lstdefinestyle{python}{ % Only for Python
        keywordstyle=\color{Magenta}
    }
---

C++:

```cpp
int main(int argc, char *argv[])
{
    return 0;
}
```

Python:

```python
def main():
    print('Hello')

if __name__ == '__main__':
    main()
```

Then compile the example (--listings is needed only for this example):

pandoc input.md --filter pandoc-code-attribute --listings -o output.pdf

Results:

Command

In general, to use this filter, just add this filter to pandoc command:

pandoc input.md --filter pandoc-code-attribute -o output.pdf