varmod.mk revision 1.22
1 # $NetBSD: varmod.mk,v 1.22 2025/01/11 20:54:46 rillig Exp $ 2 # 3 # Tests for variable modifiers, such as :Q, :S,from,to or :Ufallback. 4 # 5 # See also: 6 # varparse-errors.mk 7 8 # As of 2024-06-05, the possible behaviors during parsing are: 9 # 10 # * `strict`: the parsing style used by most modifiers: 11 # * either uses `ParseModifierPart` or parses the modifier literal 12 # * other modifiers may follow, separated by a ':' 13 # 14 # * `greedy`: calls `ParseModifierPart` with `ch->endc`; this means 15 # that no further modifiers are parsed in that expression. 16 # 17 # * `no-colon`: after parsing this modifier, the following modifier 18 # does not need to be separated by a colon. 19 # Omitting this colon is bad style. 20 # 21 # * `individual`: parsing this modifier does not follow the common 22 # pattern of calling `ParseModifierPart`. 23 # 24 # The SysV column says whether a parse error in the modifier falls back 25 # trying the `:from=to` System V modifier. 26 # 27 # | **Operator** | **Behavior** | **Remarks** | **SysV** | 28 # |--------------|--------------|--------------------|----------| 29 # | `!` | no-colon | | no | 30 # | `:=` | greedy | | yes | 31 # | `?:` | greedy | | no | 32 # | `@` | no-colon | | no | 33 # | `C` | no-colon | | no | 34 # | `D` | individual | custom parser | N/A | 35 # | `E` | strict | | yes | 36 # | `H` | strict | | yes | 37 # | `L` | no-colon | | N/A | 38 # | `M` | individual | custom parser | N/A | 39 # | `N` | individual | custom parser | N/A | 40 # | `O` | strict | only literal value | no | 41 # | `P` | no-colon | | N/A | 42 # | `Q` | strict | | yes | 43 # | `R` | strict | | yes | 44 # | `S` | no-colon | | N/A | 45 # | `T` | strict | | N/A | 46 # | `U` | individual | custom parser | N/A | 47 # | `[` | strict | | no | 48 # | `_` | individual | strcspn | yes | 49 # | `gmtime` | strict | | yes | 50 # | `hash` | strict | | N/A | 51 # | `localtime` | strict | | yes | 52 # | `q` | strict | | yes | 53 # | `range` | strict | | N/A | 54 # | `sh` | strict | | N/A | 55 # | `t` | strict | | no | 56 # | `u` | strict | | yes | 57 # | `from=to` | greedy | SysV, fallback | N/A | 58 59 # These tests assume 60 .MAKE.SAVE_DOLLARS = yes 61 62 DOLLAR1= $$ 63 DOLLAR2= ${:U\$} 64 65 # To get a single '$' sign in the value of an expression, it has to 66 # be written as '$$' in a literal variable value. 67 # 68 # See Var_Parse, where it calls Var_Subst. 69 .if ${DOLLAR1} != "\$" 70 . error 71 .endif 72 73 # Another way to get a single '$' sign is to use the :U modifier. In the 74 # argument of that modifier, a '$' is escaped using the backslash instead. 75 # 76 # See Var_Parse, where it calls Var_Subst. 77 .if ${DOLLAR2} != "\$" 78 . error 79 .endif 80 81 # It is also possible to use the :U modifier directly in the expression. 82 # 83 # See Var_Parse, where it calls Var_Subst. 84 .if ${:U\$} != "\$" 85 . error 86 .endif 87 88 # XXX: As of 2020-09-13, it is not possible to use '$$' in a variable name 89 # to mean a single '$'. This contradicts the manual page, which says that 90 # '$' can be escaped as '$$'. 91 .if ${$$:L} != "" 92 . error 93 .endif 94 95 # In lint mode, make prints helpful error messages. 96 # For compatibility, make does not print these error messages in normal mode. 97 # Should it? 98 .MAKEFLAGS: -dL 99 # expect+2: To escape a dollar, use \$, not $$, at "$$:L} != """ 100 # expect+1: Invalid variable name ':', at "$:L} != """ 101 .if ${$$:L} != "" 102 . error 103 .endif 104 105 # A '$' followed by nothing is an error as well. 106 # expect+1: Dollar followed by nothing 107 .if ${:Uword:@word@${word}$@} != "word" 108 . error 109 .endif 110 111 # The variable modifier :P does not fall back to the SysV modifier. 112 # Therefore the modifier :P=RE generates a parse error. 113 # XXX: The .error should not be reached since the expression is 114 # malformed, and this error should be propagated up to Cond_EvalLine. 115 VAR= STOP 116 # expect+1: Missing delimiter ':' after modifier "P" 117 .if ${VAR:P=RE} != "STORE" 118 # expect+1: Missing argument for ".error" 119 . error 120 .endif 121 122 # Test the word selection modifier ':[n]' with a very large number that is 123 # larger than ULONG_MAX for any supported platform. 124 # expect+1: Bad modifier ":[99333000222000111000]" 125 .if ${word:L:[99333000222000111000]} 126 .endif 127 # expect+1: Bad modifier ":[2147483648]" 128 .if ${word:L:[2147483648]} 129 .endif 130 131 # Test the range generation modifier ':range=n' with a very large number that 132 # is larger than SIZE_MAX for any supported platform. 133 # expect+1: Invalid number "99333000222000111000}" for ':range' modifier 134 .if ${word:L:range=99333000222000111000} 135 .endif 136 137 # In an indirect modifier, the delimiter is '\0', which at the same time marks 138 # the end of the string. The sequence '\\' '\0' is not an escaped delimiter, 139 # as it would be wrong to skip past the end of the string. 140 # expect+1: Invalid time value "\" 141 .if ${:${:Ugmtime=\\}} 142 . error 143 .endif 144 145 # Test a '$' at the end of a modifier part, for all modifiers in the order 146 # listed in ApplyModifier. 147 # 148 # The only modifier parts where an unescaped '$' makes sense at the end are 149 # the 'from' parts of the ':S' and ':C' modifiers. In all other modifier 150 # parts, an unescaped '$' is an undocumented and discouraged edge case, as it 151 # means the same as an escaped '$'. 152 .if ${:U:!printf '%s\n' $!} != "\$" 153 . error 154 .endif 155 # expect+1: Dollar followed by nothing 156 .if ${VAR::=value$} != "" || ${VAR} != "value" 157 . error 158 .endif 159 ${:U }= <space> 160 # expect+2: Dollar followed by nothing 161 # expect+1: Dollar followed by nothing 162 .if ${VAR::+=appended$} != "" || ${VAR} != "value<space>appended" 163 . error 164 .endif 165 .if ${1:?then$:else$} != "then\$" 166 . error 167 .endif 168 .if ${0:?then$:else$} != "else\$" 169 . error 170 .endif 171 # expect+1: Dollar followed by nothing 172 .if ${word:L:@w@$w$@} != "word" 173 . error 174 .endif 175 # expect+1: Bad modifier ":[$]" 176 .if ${word:[$]} 177 . error 178 .else 179 . error 180 .endif 181 VAR_DOLLAR= VAR$$ 182 .if ${word:L:_=VAR$} != "word" || ${${VAR_DOLLAR}} != "word" 183 . error 184 .endif 185 .if ${word:L:C,d$,m,} != "worm" 186 . error 187 .endif 188 .if ${word:L:C,d,$,} != "wor\$" 189 . error 190 .endif 191 # expect+2: Dollar followed by nothing 192 # expect+1: Invalid variable name '}', at "$} != "set"" 193 .if ${VAR:Dset$} != "set" 194 . error 195 .endif 196 # expect+1: Invalid variable name '}', at "$} != "fallback"" 197 .if ${:Ufallback$} != "fallback" 198 . error 199 .endif 200 # expect+1: Invalid time value "1000$" 201 .if ${%y:L:gmtime=1000$} 202 . error 203 .else 204 . error 205 .endif 206 # expect+1: Invalid time value "1000$" 207 .if ${%y:L:localtime=1000$} 208 . error 209 .else 210 . error 211 .endif 212 # expect+1: Dollar followed by nothing 213 .if ${word:L:Mw*$} != "word" 214 . error 215 .endif 216 # expect+1: Dollar followed by nothing 217 .if ${word:L:NX*$} != "word" 218 . error 219 .endif 220 # expect+1: Invalid argument 'fallback$' for modifier ':mtime' 221 .if ${.:L:mtime=fallback$} 222 . error 223 .else 224 . error 225 .endif 226 .if ${word:L:S,d$,m,} != "worm" 227 . error 228 .endif 229 .if ${word:L:S,d,m$,} != "worm\$" 230 . error 231 .endif 232
Indexes created Thu Oct 02 07:10:07 GMT 2025