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# file opened: dup_index_var.asm
 1    0000                      MACRO filler x1, x2, y1, y2
 2    0000 ~                            DUP (y2 - y1), .y
 3    0000 ~                                    DUP (x2 - x1), .x
 4    0000 ~                                            DB x1 + .x, y1 + .y
 5    0000 ~                                    EDUP
 6    0000 ~                            EDUP
 7    0000 ~                            IF .x   ; index variable does exist after DUP with last used index (not +1 beyond it!)
 8    0000 ~                                    DD 0xA0DED1BA   ; but this is not documented and rather shouldn't be used at all
 9    0000 ~                            ENDIF
10    0000                      ENDM
11    0000
12    0000                      filler 3, 5, 10, 12
12    0000             >                DUP (12 - 10), .y
12    0000             >                        DUP (5 - 3), .x
12    0000 03 0A       >                                DB 3 + .x, 10 + .y
12    0002 04 0A       >                                DB 3 + .x, 10 + .y
12    0004             >                        EDUP
12    0004             >                        DUP (5 - 3), .x
12    0004 03 0B       >                                DB 3 + .x, 10 + .y
12    0006 04 0B       >                                DB 3 + .x, 10 + .y
12    0008             >                        EDUP
12    0008             >                EDUP
12    0008             >                IF .x   ; index variable does exist after DUP with last used index (not +1 beyond it!)
12    0008 BA D1 DE A0 >                        DD 0xA0DED1BA   ; but this is not documented and rather shouldn't be used at all
12    000C             >                ENDIF
13    000C                      filler 100, 101, 200, 201
13    000C             >                DUP (201 - 200), .y
13    000C             >                        DUP (101 - 100), .x
13    000C 64 C8       >                                DB 100 + .x, 200 + .y
13    000E             >                        EDUP
13    000E             >                EDUP
13    000E             >                IF .x   ; index variable does exist after DUP with last used index (not +1 beyond it!)
13    000E ~           >                        DD 0xA0DED1BA   ; but this is not documented and rather shouldn't be used at all
13    000E             >                ENDIF
14    000E
15    000E                      DUP 4   ,   idx                 ; eol comment test
16    000E 12 00       >                DB    0x12, idx
16    0010 12 01       >                DB    0x12, idx
16    0012 12 02       >                DB    0x12, idx
16    0014 12 03       >                DB    0x12, idx
17    0016                      EDUP
18    0016
19    0016              main:
20    0016                      DUP 2   ,   .idx                ; eol comment test
21    0016 23 00       >                DB    0x23, .idx
21    0018 23 01       >                DB    0x23, .idx
22    001A                      EDUP
23    001A
dup_index_var.asm(24): error: [DUP/REPT] invalid index variable name: @idx2
24    001A                      DUP 1   ,   @idx2               ; only local label prefix "." is supported for index variable name
dup_index_var.asm(25): error: Label not found: idx2
25    001A 34 00       >                DB    0x34, @idx2
26    001C                      EDUP
27    001C
dup_index_var.asm(28): error: [DUP/REPT] invalid index variable name: !idx2
28    001C                      DUP 1   ,   !idx2               ; only local label prefix "." is supported for index variable name
dup_index_var.asm(29): error: Label not found: idx2
29    001C 45 00       >                DB    0x45, idx2
30    001E                      EDUP
31    001E
dup_index_var.asm(32): error: [DUP] unexpected chars: .idx
32    001E                      DUP 1 .idx                              ; invalid syntax, missing comma
33    001E                      EDUP
34    001E
35    001E                      DUP 1                                   ; w/o indexVar name, eol comment test
36    001E 03 01       >                DB idx, .idx
37    0020                      EDUP
38    0020
# file closed: dup_index_var.asm

Value    Label
------ - -----------------------------------------------------------
0x0001   0>x
0x0001   0>y
0x0000   1>x
0x0000   1>y
0x0003   idx
0x0016 X main
0x0001   main.idx