Rstudio: Highlight function parameters + separate styling for operators

[Mashin6]

I found that this has been requested a while ago here: https://support.rstudio.com/hc/en-us/community/posts/211643088-syntax-highlighting-for-known-function-names-parameter-names
But I couldn't find any news about adding possibility to add highlighting of parameters.

A second suggestion is to allow separate styling option for (), <-, %>%, =, etc.

[ronblum]

@Mashin6 Thank you for the suggestion. We'll review this as we continue development of RStudio.

It's possible to create custom themes, uploaded using Tools -> Global Options -> Appearance -> Add. However, @MariaSemple—is it possible to make themes that have different styling for parameters and each operator?

[MariaSemple]

It is possible to do some custom styling for operators. Unfortunately, it is not currently possible to have separate styling for parameters. We are tracking this enhancement request here: https://github.com/rstudio/rstudio/issues/3717.

To apply a style for all operators, you can use the CSS selector .ace_keyword.ace_operator. To apply a style for (), {}, and [], you can use the CSS selector .ace_keyword.ace_operator.ace_paren. To apply a style for custom user operators (anything within %%, including %>% and %/%), you can use the CSS selector .ace_keyword.ace_operator.ace_infix.

[Mashin6]

Thank you .ace_keyword.ace_operator.ace_paren already helped.

It's great that you already thought about the parameter styling. I think everybody would benefit if we could improve the readability of R code as it is in Sublime.