1# $Id: varmisc.mk,v 1.5 2015/10/12 17:10:48 sjg Exp $ 2# 3# Miscellaneous variable tests. 4 5all: unmatched_var_paren D_true U_true D_false U_false Q_lhs Q_rhs NQ_none 6 7unmatched_var_paren: 8 @echo ${foo::=foo-text} 9 10True = ${echo true >&2:L:sh}TRUE 11False= ${echo false >&2:L:sh}FALSE 12 13VSET= is set 14.undef UNDEF 15 16U_false: 17 @echo :U skipped when var set 18 @echo ${VSET:U${False}} 19 20D_false: 21 @echo :D skipped if var undef 22 @echo ${UNDEF:D${False}} 23 24U_true: 25 @echo :U expanded when var undef 26 @echo ${UNDEF:U${True}} 27 28D_true: 29 @echo :D expanded when var set 30 @echo ${VSET:D${True}} 31 32Q_lhs: 33 @echo :? only lhs when value true 34 @echo ${1:L:?${True}:${False}} 35 36Q_rhs: 37 @echo :? only rhs when value false 38 @echo ${0:L:?${True}:${False}} 39 40NQ_none: 41 @echo do not evaluate or expand :? if discarding 42 @echo ${VSET:U${1:L:?${True}:${False}}} 43