dest_res_select : term -> (term # term # term)
STRUCTURE
res_quanLib
SYNOPSIS
Breaks apart a restricted choice quantified term into the quantified variable, predicate and body.
DESCRIPTION
dest_res_select is a term destructor for restricted choice quantification: 
   dest_res_select "@var::P. t"
returns ("var","P","t").
FAILURE
Fails with dest_res_select if the term is not a restricted choice quantification.
SEEALSO
mk_res_select, is_res_select
HOL  Kananaskis-14