ccmode: Line-Up Functions
11.3 Line-Up Functions
======================
Often there are cases when a simple offset setting on a syntactic symbol
isn’t enough to get the desired indentation—for example, you might want
to line up a closing parenthesis with the matching opening one rather
than indenting relative to its “anchor point”. CC Mode provides this
flexibility with “line-up functions”.
The way you associate a line-up function with a syntactic symbol is
described in 
c-offsets-alist. CC Mode comes with many
predefined line-up functions for common situations. If none of these
does what you want, you can write your own. Custom Line-Up.
Sometimes, it is easier to tweak the standard indentation by adding a
function to ‘c-special-indent-hook’ (Other Indentation).
The line-up functions haven’t been adapted for AWK buffers or tested
with them. Some of them might work serendipitously. There shouldn’t be
any problems writing custom line-up functions for AWK mode.
The calling convention for line-up functions is described fully in
Custom Line-Up. Roughly speaking, the return value is either an
offset itself (such as ‘+’ or ‘[0]’) or it’s ‘nil’, meaning “this
function is inappropriate in this case; try a different one”.
c-offsets-alist.
The subsections below describe all the standard line-up functions,
categorized by the sort of token the lining-up centers around. For each
of these functions there is a “works with” list that indicates which
syntactic symbols the function is intended to be used with.
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