RUBY					*ruby.vim* *ft-ruby-syntax*

There are a number of options to the Ruby syntax highlighting.

1. Ruby operators                     |ruby_operators|
2. Whitespace errors                  |ruby_space_errors|
3. Folds                              |ruby_fold|
4. Reducing expensive operations      |ruby_no_expensive| |ruby_minlines|


1. Ruby operators				*ruby_operators*

Ruby operators can be highlighted.

This is enabled by defining "ruby_operators": >

	:let ruby_operators = 1
<

2. Whitespace errors				*ruby_space_errors*

Whitespace errors can be highlighted by defining "ruby_space_errors": >

	:let ruby_space_errors = 1
<

This will highlight trailing whitespace and tabs preceded by a space character
as errors.  This can be refined by defining "ruby_no_trail_space_error" and
"ruby_no_tab_space_error" which will ignore trailing whitespace and tabs after
spaces respectively.

3. Folds					*ruby_fold*

Folds can be enabled by defining "ruby_fold": >

	:let ruby_fold = 1
<

This will set the value |foldmethod| to "syntax" locally to the current buffer
or window, which will enable syntax-based folding when editing Ruby filetypes.

4. Reducing expensive operations		*ruby_no_expensive*

By default, the "end" keyword is colorized according to the opening statement
of the block it closes.  While useful, this feature can be expensive; if you
experience slow redrawing (or you are on a terminal with poor color support)
you may want to turn it off by defining the "ruby_no_expensive" variable: >

	:let ruby_no_expensive = 1
<
In this case the same color will be used for all control keywords.

						*ruby_minlines*

If you do want this feature enabled, but notice highlighting errors while
scrolling backwards, which are fixed when redrawing with CTRL-L, try setting
the "ruby_minlines" variable to a value larger than 50: >

	:let ruby_minlines = 100
<
Ideally, this value should be a number of lines large enough to embrace your
largest class or module.

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