Variadic Macros

[Charles Pegge]

A very simple idea: the macro clones itself for every parameter passed.

  macro mi(...)
  printl ...
  end macro


  mi 1,2,3,4,5,6,7


result:
1
2
3
4
5
6
7


Oxygen Update
http://www.oxygenbasic.org/o2zips/Oxygen.zip

[Charles Pegge]

Another concept to allow macros to process optional parameters:

#ifexist
#ifnexist

Code: OxygenBasic

1.  
2.   includepath "$/inc/"
3.   include "console.inc"
4.  
5.   macro mo(a,b,c,d)
6.   =================
7.   #ifexist a
8.     printl a
9.   #endif
10.   #ifexist b
11.     printl b
12.   #endif
13.   #ifexist c
14.     printl c
15.   #endif
16.   #ifexist d
17.     printl d
18.   #endif
19.   printl "ok"
20.   end macro
21.  
22.   macro mi(...)
23.   =============
24.   printl ...
25.   end macro
26.  
27.  
28.   mo 1,2,3,4,5,6,7
29. /*
30.   restult:
31.   1
32.   2
33.   3
34.   4
35.   ok
36. */
37.  
38.   mi 1,2,3,4,5,6,7
39. /*
40.   restult:
41.   1
42.   2
43.   3
44.   4
45.   5
46.   6
47.   7
48. */
49.  
50.   waitkey
51.