chord tied to the next measure and then "slurred"/pulled-off

[Federico Bruni]

Hi LilyPonders

How would you write the following music?

My favorite is the first one...
The second example is a bug or a limitation of doubleSlurs?
The third is probably the worse (for tablature).

\version "2.19.34"

\paper {
 ragged-last = ##t
}

myMusic = \relative {
 \set doubleSlurs = ##t

 % My favorite
 r2^"1. doubleSlurs on, slur from first chord" <c' a>( ~ q <b g>)

 % The tied a should be shown in parentheses on Tabstaff, as 
doubleSlurs is true.
 r2^"2. doubleSlurs on, slur from tied chord" <c a> ~ q( <b g>)
 \break

 \set doubleSlurs = ##f
 r2^"3. doubleSlurs off, manual slurs from tied chord" <c a> ~ <c\=1( 
a\=2(> <b\=1) g\=2)>
}

\score {
 \new StaffGroup <<
   \new Staff { \clef "treble_8" \myMusic }
   \new TabStaff { \new TabVoice \myMusic }
 >>
 \layout { indent = 0 }
}

chord-slur-tabstaff.png
Description: PNG image