Re: "or" shortcut does not work - but why?

[Nick Gammon <nick@...>]

On 17/06/2007, at 4:59 PM, Andreas Rozek wrote:

> the compiler has been ported - what is the recommended way to
> post the results of a compilation  (i.e., a luac run) to this
> list?

This is what I got trying your test (successfully):

$ luac -l -

  local Result = false;  -- you could also use "nil" here
    Result = Result or "anything else";
  io.stdout:write("Result = '"..tostring(Result).."'");


main <stdin:0,0> (15 instructions, 60 bytes at 0x805d190)
0+ params, 6 slots, 0 upvalues, 1 local, 7 constants, 0 functions
        1       [2]     LOADBOOL        0 0 0
        2       [3]     TEST            0 0 1
        3       [3]     JMP             1       ; to 5
        4       [3]     LOADK           0 -1    ; "anything else"
        5       [4]     GETGLOBAL       1 -2    ; io
        6       [4]     GETTABLE        1 1 -3  ; "stdout"
        7       [4]     SELF            1 1 -4  ; "write"
        8       [4]     LOADK           3 -5    ; "Result = '"
        9       [4]     GETGLOBAL       4 -6    ; tostring
        10      [4]     MOVE            5 0
        11      [4]     CALL            4 2 2
        12      [4]     LOADK           5 -7    ; "'"
        13      [4]     CONCAT          3 3 5
        14      [4]     CALL            1 3 1
        15      [4]     RETURN          0 1