As an example of how to customize indentation, let's change the
style of this example(24):
1: int add( int val, int incr, int doit )
2: {
3: if( doit )
4: {
5: return( val + incr );
6: }
7: return( val );
8: }
to:
1: int add( int val, int incr, int doit )
2: {
3: if( doit )
4: {
5: return( val + incr );
6: }
7: return( val );
8: }
In other words, we want to change the indentation of braces that open a
block following a condition so that the braces line up under the
conditional, instead of being indented. Notice that the construct we
want to change starts on line 4. To change the indentation of a line,
we need to see which syntactic components affect the offset calculations
for that line. Hitting C-c C-s on line 4 yields:
((substatement-open . 44))
so we know that to change the offset of the open brace, we need to
change the indentation for the substatement-open syntactic
symbol. To do this interactively, just hit C-c C-o. This prompts
you for the syntactic symbol to change, providing a reasonable default.
In this case, the default is substatement-open, which is just the
syntactic symbol we want to change!
After you hit return, CC Mode will then prompt you for the new
offset value, with the old value as the default. The default in this
case is `+', but we want no extra indentation so enter
`0' and RET. This will associate the offset 0 with the
syntactic symbol substatement-open.
To check your changes quickly, just hit C-c C-q
(c-indent-defun) to reindent the entire function. The example
should now look like:
1: int add( int val, int incr, int doit )
2: {
3: if( doit )
4: {
5: return( val + incr );
6: }
7: return( val );
8: }
Notice how just changing the open brace offset on line 4 is all we
needed to do. Since the other affected lines are indented relative to
line 4, they are automatically indented the way you'd expect. For more
complicated examples, this may not always work. The general approach to
take is to always start adjusting offsets for lines higher up in the
file, then re-indent and see if any following lines need further
adjustments.
Please take a moment to fill out
this visitor survey You can help support this site by
visiting the advertisers that sponsor it! (only once each, though)
