1# $NetBSD: cond-short.mk,v 1.7 2020/07/09 22:34:09 sjg Exp $ 2# 3# Demonstrates that in conditions, the right-hand side of an && or || 4# is only evaluated if it can actually influence the result. 5# 6# Between 2015-10-11 and 2020-06-28, the right-hand side of an && or || 7# operator was always evaluated, which was wrong. 8# 9 10# The && operator. 11 12.if 0 && ${echo "unexpected and" 1>&2 :L:sh} 13.endif 14 15.if 1 && ${echo "expected and" 1>&2 :L:sh} 16.endif 17 18.if 0 && exists(nonexistent${echo "unexpected and exists" 1>&2 :L:sh}) 19.endif 20 21.if 1 && exists(nonexistent${echo "expected and exists" 1>&2 :L:sh}) 22.endif 23 24.if 0 && empty(${echo "unexpected and empty" 1>&2 :L:sh}) 25.endif 26 27.if 1 && empty(${echo "expected and empty" 1>&2 :L:sh}) 28.endif 29 30# "VAR U11" is not evaluated; it was evaluated before 2020-07-02. 31# The whole !empty condition is only parsed and then discarded. 32VAR= ${VAR${:U11${echo "unexpected VAR U11" 1>&2 :L:sh}}} 33VAR13= ${VAR${:U12${echo "unexpected VAR13" 1>&2 :L:sh}}} 34.if 0 && !empty(VAR${:U13${echo "unexpected U13 condition" 1>&2 :L:sh}}) 35.endif 36 37VAR= ${VAR${:U21${echo "unexpected VAR U21" 1>&2 :L:sh}}} 38VAR23= ${VAR${:U22${echo "expected VAR23" 1>&2 :L:sh}}} 39.if 1 && !empty(VAR${:U23${echo "expected U23 condition" 1>&2 :L:sh}}) 40.endif 41VAR= # empty again, for the following tests 42 43# The :M modifier is only parsed, not evaluated. 44# Before 2020-07-02, it was wrongly evaluated. 45.if 0 && !empty(VAR:M${:U${echo "unexpected M pattern" 1>&2 :L:sh}}) 46.endif 47 48.if 1 && !empty(VAR:M${:U${echo "expected M pattern" 1>&2 :L:sh}}) 49.endif 50 51.if 0 && !empty(VAR:S,from,${:U${echo "unexpected S modifier" 1>&2 :L:sh}},) 52.endif 53 54.if 0 && !empty(VAR:C,from,${:U${echo "unexpected C modifier" 1>&2 :L:sh}},) 55.endif 56 57.if 0 && !empty("" == "" :? ${:U${echo "unexpected ? modifier" 1>&2 :L:sh}} :) 58.endif 59 60.if 0 && !empty(VAR:old=${:U${echo "unexpected = modifier" 1>&2 :L:sh}}) 61.endif 62 63.if 0 && !empty(1 2 3:L:@var@${:U${echo "unexpected @ modifier" 1>&2 :L:sh}}@) 64.endif 65 66.if 0 && !empty(:U${:!echo "unexpected exclam modifier" 1>&2 !}) 67.endif 68 69# The || operator. 70 71.if 1 || ${echo "unexpected or" 1>&2 :L:sh} 72.endif 73 74.if 0 || ${echo "expected or" 1>&2 :L:sh} 75.endif 76 77.if 1 || exists(nonexistent${echo "unexpected or exists" 1>&2 :L:sh}) 78.endif 79 80.if 0 || exists(nonexistent${echo "expected or exists" 1>&2 :L:sh}) 81.endif 82 83.if 1 || empty(${echo "unexpected or empty" 1>&2 :L:sh}) 84.endif 85 86.if 0 || empty(${echo "expected or empty" 1>&2 :L:sh}) 87.endif 88 89# Unreachable nested conditions are skipped completely as well. 90 91.if 0 92. if ${echo "unexpected nested and" 1>&2 :L:sh} 93. endif 94.endif 95 96.if 1 97.elif ${echo "unexpected nested or" 1>&2 :L:sh} 98.endif 99 100# make sure these do not cause complaint 101#.MAKEFLAGS: -dc 102 103V42 = 42 104iV1 = ${V42} 105iV2 = ${V66} 106 107.if defined(V42) && ${V42} > 0 108x=Ok 109.else 110x=Fail 111.endif 112x!= echo 'defined(V42) && ${V42} > 0: $x' >&2; echo 113# this one throws both String comparison operator and 114# Malformed conditional with cond.c 1.78 115# indirect iV2 would expand to "" and treated as 0 116.if defined(V66) && ( ${iV2} < ${V42} ) 117x=Fail 118.else 119x=Ok 120.endif 121x!= echo 'defined(V66) && ( "${iV2}" < ${V42} ): $x' >&2; echo 122# next two thow String comparison operator with cond.c 1.78 123# indirect iV1 would expand to 42 124.if 1 || ${iV1} < ${V42} 125x=Ok 126.else 127x=Fail 128.endif 129x!= echo '1 || ${iV1} < ${V42}: $x' >&2; echo 130.if 1 || ${iV2:U2} < ${V42} 131x=Ok 132.else 133x=Fail 134.endif 135x!= echo '1 || ${iV2:U2} < ${V42}: $x' >&2; echo 136# the same expressions are fine when the lhs is expanded 137# ${iV1} expands to 42 138.if 0 || ${iV1} <= ${V42} 139x=Ok 140.else 141x=Fail 142.endif 143x!= echo '0 || ${iV1} <= ${V42}: $x' >&2; echo 144# ${iV2:U2} expands to 2 145.if 0 || ${iV2:U2} < ${V42} 146x=Ok 147.else 148x=Fail 149.endif 150x!= echo '0 || ${iV2:U2} < ${V42}: $x' >&2; echo 151 152all: 153 @:;: 154