OpenEuphoria

routine_id()

• Posted by Jiri Babor <J.Babor at GNS.CRI.NZ> Jul 05, 2000
• 525 views

A couple of trivial illustrations:

--  example 1:

function get_id(sequence routine_name)
    return routine_id(routine_name)
end function

procedure hello()
    puts(1, "hello, world!\n")
end procedure

? get_id("hello")   -- prints -1 : named routine can't be found


--  example 2:

procedure hello()
    puts(1, "hello, world!\n")
end procedure

function get_id(sequence routine_name)
    return routine_id(routine_name)
end function

? get_id("hello")   -- prints 0 : ok, routine found


I have been caught by this one so many times it's not funny! The book
says, roughly:

    "... The named routine by  must be visible, i.e. callable, at the
    place where routine_id() is used to get the id number ..."


To restrict the search for the routine's name to the point where the
routine_id() is _located_ in the source code and not where it is
actually _invoked_ is probably very convenient for the interpreter,
but a bloody nuisance as far as I am concerned ;). Can anything be
done about it, Robert? You would not need two passes for that, would
you?

jiri