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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