1# $NetBSD: cond-cmp-string.mk,v 1.17 2023/03/28 14:38:29 rillig Exp $ 2# 3# Tests for string comparisons in .if conditions. 4 5# This is a simple comparison of string literals. 6# Nothing surprising here. 7.if "str" != "str" 8. error 9.endif 10 11# The right-hand side of the comparison may be written without quotes. 12.if "str" != str 13. error 14.endif 15 16# The left-hand side of the comparison must be enclosed in quotes. 17# This one is not enclosed in quotes and thus generates an error message. 18# expect+1: Malformed conditional (str != str) 19.if str != str 20. error 21.endif 22 23# The left-hand side of the comparison requires that any variable expression 24# is defined. 25# 26# The variable named "" is never defined, nevertheless it can be used as a 27# starting point for variable expressions. Applying the :U modifier to such 28# an undefined expression turns it into a defined expression. 29# 30# See ApplyModifier_Defined and DEF_DEFINED. 31.if ${:Ustr} != "str" 32. error 33.endif 34 35# Any character in a string literal may be escaped using a backslash. 36# This means that "\n" does not mean a newline but a simple "n". 37.if "string" != "\s\t\r\i\n\g" 38. error 39.endif 40 41# It is not possible to concatenate two string literals to form a single 42# string. In C, Python and the shell this is possible, but not in make. 43# expect+1: Malformed conditional ("string" != "str""ing") 44.if "string" != "str""ing" 45. error 46.else 47. error 48.endif 49 50# There is no = operator for strings. 51# expect+1: Malformed conditional (!("value" = "value")) 52.if !("value" = "value") 53. error 54.else 55. error 56.endif 57 58# There is no === operator for strings either. 59# expect+1: Malformed conditional (!("value" === "value")) 60.if !("value" === "value") 61. error 62.else 63. error 64.endif 65 66# A variable expression can be enclosed in double quotes. 67.if ${:Uword} != "${:Uword}" 68. error 69.endif 70 71# Between 2003-01-01 (maybe even earlier) and 2020-10-30, adding one of the 72# characters " \t!=><" directly after a variable expression resulted in a 73# "Malformed conditional", even though the string was well-formed. 74.if ${:Uword } != "${:Uword} " 75. error 76.endif 77# Some other characters worked though, and some didn't. 78# Those that are mentioned in is_separator didn't work. 79.if ${:Uword0} != "${:Uword}0" 80. error 81.endif 82.if ${:Uword&} != "${:Uword}&" 83. error 84.endif 85.if ${:Uword!} != "${:Uword}!" 86. error 87.endif 88.if ${:Uword<} != "${:Uword}<" 89. error 90.endif 91 92# Adding another variable expression to the string literal works though. 93.if ${:Uword} != "${:Uwo}${:Urd}" 94. error 95.endif 96 97# Adding a space at the beginning of the quoted variable expression works 98# though. 99.if ${:U word } != " ${:Uword} " 100. error 101.endif 102 103# If at least one side of the comparison is a string literal, the string 104# comparison is performed. 105.if 12345 != "12345" 106. error 107.endif 108 109# If at least one side of the comparison is a string literal, the string 110# comparison is performed. The ".0" in the left-hand side makes the two 111# sides of the equation unequal. 112.if 12345.0 == "12345" 113. error 114.endif 115 116# Strings cannot be compared relationally, only for equality. 117# expect+1: Comparison with '<' requires both operands 'string' and 'string' to be numeric 118.if "string" < "string" 119. error 120.else 121. error 122.endif 123 124# Strings cannot be compared relationally, only for equality. 125# expect+1: Comparison with '<=' requires both operands 'string' and 'string' to be numeric 126.if "string" <= "string" 127. error 128.else 129. error 130.endif 131 132# Strings cannot be compared relationally, only for equality. 133# expect+1: Comparison with '>' requires both operands 'string' and 'string' to be numeric 134.if "string" > "string" 135. error 136.else 137. error 138.endif 139 140# Strings cannot be compared relationally, only for equality. 141# expect+1: Comparison with '>=' requires both operands 'string' and 'string' to be numeric 142.if "string" >= "string" 143. error 144.else 145. error 146.endif 147 148# Two variables with different values compare unequal. 149VAR1= value1 150VAR2= value2 151.if ${VAR1} != ${VAR2} 152.else 153. error 154.endif 155