Dbh query with params for FS

freeswitch.i

%module freeswitch

%{
#include "freeswitch_lua.h"
%}

%typemap(in, checkfn = "lua_isfunction") SWIGLUA_FN {
  $1.L = L;
  $1.idx = $input;
}

%typemap(default) SWIGLUA_FN {
  SWIGLUA_FN default_swiglua_fn = { 0 };
  $1 = default_swiglua_fn;
}

%typemap(typecheck) SWIGLUA_FN {
  $1 = lua_isfunction(L, $input);
}

%typemap(in, checkfn = "lua_istable") SWIGLUA_TABLE {
  $1.L = L;
  $1.idx = $input;
}

%typemap(default) SWIGLUA_TABLE {
  SWIGLUA_TABLE default_swiglua_table = { 0 };
  $1 = default_swiglua_table;
}

%typemap(typecheck) SWIGLUA_TABLE {
  $1 = lua_istable(L, $input);
}

class Dbh {
  public:
    Dbh(char *dsn, char *user = NULL, char *pass = NULL);
    bool query(char *sql, SWIGLUA_FN lua_fun);
    bool query(char *sql, SWIGLUA_TABLE lua_params);
    bool query(char *sql, SWIGLUA_TABLE lua_params, SWIGLUA_FN lua_fun);
};
 

test.lua

dbh:query('1');       -- bool query(char *sql, SWIGLUA_FN lua_fun);
dbh:query('2', {})    -- bool query(char *sql, SWIGLUA_TABLE lua_params);
dbh:query('3', {}, function() end) -- bool query(char *sql, SWIGLUA_TABLE lua_params, SWIGLUA_FN lua_fun);
dbh:query('4', function() end) -- bool query(char *sql, SWIGLUA_FN lua_fun);