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cond-short.mk revision 1.2 
      1  1.2  rillig # $NetBSD: cond-short.mk,v 1.2 2020/06/28 11:06:26 rillig Exp $
      2  1.1  rillig #
      3  1.1  rillig # Demonstrates that in conditions, the right-hand side of an && or ||
      4  1.2  rillig # is only evaluated if it can actually influence the result.
      5  1.1  rillig #
      6  1.2  rillig # Between 2015-10-11 and 2020-06-28, the right-hand side of an && or ||
      7  1.2  rillig # operator was always evaluated, which was wrong.
      8  1.1  rillig #
      9  1.2  rillig 
     10  1.2  rillig # The && operator.
     11  1.1  rillig 
     12  1.1  rillig .if 0 && ${echo "unexpected and" 1>&2 :L:sh}
     13  1.1  rillig .endif
     14  1.1  rillig 
     15  1.1  rillig .if 1 && ${echo "expected and" 1>&2 :L:sh}
     16  1.1  rillig .endif
     17  1.1  rillig 
     18  1.2  rillig .if 0 && exists(nonexistent${echo "unexpected and exists" 1>&2 :L:sh})
     19  1.2  rillig .endif
     20  1.2  rillig 
     21  1.2  rillig .if 1 && exists(nonexistent${echo "expected and exists" 1>&2 :L:sh})
     22  1.2  rillig .endif
     23  1.2  rillig 
     24  1.2  rillig .if 0 && empty(${echo "unexpected and empty" 1>&2 :L:sh})
     25  1.2  rillig .endif
     26  1.2  rillig 
     27  1.2  rillig .if 1 && empty(${echo "expected and empty" 1>&2 :L:sh})
     28  1.2  rillig .endif
     29  1.2  rillig 
     30  1.2  rillig # The || operator.
     31  1.2  rillig 
     32  1.1  rillig .if 1 || ${echo "unexpected or" 1>&2 :L:sh}
     33  1.1  rillig .endif
     34  1.1  rillig 
     35  1.1  rillig .if 0 || ${echo "expected or" 1>&2 :L:sh}
     36  1.1  rillig .endif
     37  1.1  rillig 
     38  1.2  rillig .if 1 || exists(nonexistent${echo "unexpected or exists" 1>&2 :L:sh})
     39  1.2  rillig .endif
     40  1.2  rillig 
     41  1.2  rillig .if 0 || exists(nonexistent${echo "expected or exists" 1>&2 :L:sh})
     42  1.2  rillig .endif
     43  1.2  rillig 
     44  1.2  rillig .if 1 || empty(${echo "unexpected or empty" 1>&2 :L:sh})
     45  1.2  rillig .endif
     46  1.2  rillig 
     47  1.2  rillig .if 0 || empty(${echo "expected or empty" 1>&2 :L:sh})
     48  1.2  rillig .endif
     49  1.2  rillig 
     50  1.2  rillig # Unreachable nested conditions are skipped completely as well.
     51  1.1  rillig 
     52  1.1  rillig .if 0
     53  1.1  rillig .  if ${echo "unexpected nested and" 1>&2 :L:sh}
     54  1.1  rillig .  endif
     55  1.1  rillig .endif
     56  1.1  rillig 
     57  1.1  rillig .if 1
     58  1.1  rillig .elif ${echo "unexpected nested or" 1>&2 :L:sh}
     59  1.1  rillig .endif
     60  1.1  rillig 
     61  1.1  rillig all:
     62  1.1  rillig 	@:;:
     63