defineLocals a(b, c), d(e, f, g)    

local a_b, a_c, d_e, d_f, d_g    

local some # thing    

__defineLocals a_b, a_c, d_e, d_f, d_g    

macro defineLocals parameters&
{
    ; ...
    rept 1
    \{
        \local prefix#suffix
        ; ...
    \}
}    

Normally LOCAL is processed with higher priority than operators like #, so to get it working you need nested macros. Either you can define external wrapper that would parse parameters and generate this line:

Code:

__defineLocals a_b, a_c, d_e, d_f, d_g    

and then use LOCAL directive inside the internal "__defineLocals" macro.

The other option is to use nested single-use macro with escaping, like:

Code:

macro defineLocals parameters&
{
    ; ...
    rept 1
    \{
        \local prefix#suffix
        ; ...
    \}
}    

defineLocals a_b, a_c, a_d  ; Defines all of them and creates a_b?XX and a_c?XX macros

macro a_d?XX params
{
  ...
}