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Vim runtime scripts of file types that include R code
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This repository contains the development versions of R related runtime files distributed with both Vim and Neovim.

The runtime files are sent to both Vim and Neovim maintainers when the accumulated changes become important. That is, if you have a fairly up to date Vim or Neovim, you do not need to install the files from this respository.

You may copy the files to your personal ~/.vim or ~/.config/nvim directory, but, instead of copying the files and checking for updates manually, you may want to use a plugin manager like Vim-Plug, Vundle, Neobundle, or other.

In some systems, the first files sourced by Vim and Neovim are from the system directories. In this case, if you want up to date runtime files, you have to copy them to either Vim or Neovim runtime directories.


The use of indentation options is explained in the official distribution. To see the documentation, please, in Vim or Neovim, do:

:help ft-r-indent

Known bugs

Syntax highlight bug

There is a syntax highlight problem in inline blocks when a variable name contains underline marks in Rmd files. The highlighting algorithm mistakenly interprets the underline as the beginning of an italicized word. Example:

This value will be wrongly highlighted: **`r a_b`**

Indentation bugs

Indentation of R code is slow because the algorithm deals with many specific cases. If you are interested in either improving the indent/r.vim script or rewriting it, please, look at the file indent_test.R. The current algorithm correctly indents the first 604 lines. A new script should be both faster and more accurate.

If either Vim or Neovim indents your code wrongly you may get the correct indentation by adding braces and line breaks to it. For example, try to indent the code below:

# This code will be wrongly indented:
levels(x) <- ## nl == nL or 1
    if (nl == nL) as.character(labels)
    else paste(labels, seq_along(levels), sep = "")
class(x) <- c(if(ordered) "ordered", "factor")

# But this one will be correctly indented:
levels(x) <- ## nl == nL or 1
    if (nl == nL)
        paste(labels, seq_along(levels), sep = "")
class(x) <- c(if(ordered) "ordered", "factor")

The indentation algorithm also fails to correctly indent multiline strings. Example:

# This is a multiline string:
      =", 2)

# This is the same string, but written in a single line
# to avoid indentation issues:
paste("A\n =     ", 2)

See also:

Some syntax and indentation bugs that were described above were reported when the runtime files were distributed with the Vim-R-plugin:

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