Strange behaviour with the electric ':' in c++-mode

[Marcelo M. <mm...@di...>]

In the c++-mode, after typing


template <Polarization P>
struct FacetFunc
                              ^                           
                              cursor here
 
if I type the character ':', emacs adds it, but then moves the cursor 
back to
the beginning of the word 'struct', ie, I end with something like

template <Polarization P>
struct FacetFunc :
^
cursor here, over the 's' letter.

Then I have to move to the end of the line "by hand" (C-e) to keep typing.

Marcelo