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cond-eof.mk revision 1.2 
      1 # $NetBSD: cond-eof.mk,v 1.2 2020/12/14 20:28:09 rillig Exp $
      2 #
      3 # Tests for parsing conditions, especially the end of such conditions, which
      4 # are represented as the token TOK_EOF.
      5 
      6 SIDE_EFFECT=	${:!echo 'side effect' 1>&2!}
      7 SIDE_EFFECT2=	${:!echo 'side effect 2' 1>&2!}
      8 
      9 # In the following conditions, ${SIDE_EFFECT} is the position of the first
     10 # parse error.  It is always fully evaluated, even if it were not necessary
     11 # to expand the variable expression.  This is because these syntax errors are
     12 # an edge case that does not occur during normal operation, therefore there
     13 # is no need to optimize for this case, and it would slow down the common
     14 # case as well.
     15 .if 0 ${SIDE_EFFECT} ${SIDE_EFFECT2}
     16 .endif
     17 .if 1 ${SIDE_EFFECT} ${SIDE_EFFECT2}
     18 .endif
     19 .if (0) ${SIDE_EFFECT} ${SIDE_EFFECT2}
     20 .endif
     21