| 1 |
|
| 2 | #### Lazy Evaluation of Alternative
|
| 3 | i=0
|
| 4 | x=x
|
| 5 | echo ${x:-$((i++))}
|
| 6 | echo $i
|
| 7 | echo ${undefined:-$((i++))}
|
| 8 | echo $i # i is one because the alternative was only evaluated once
|
| 9 | ## status: 0
|
| 10 | ## stdout-json: "x\n0\n0\n1\n"
|
| 11 | ## N-I dash status: 2
|
| 12 | ## N-I dash stdout-json: "x\n0\n"
|
| 13 |
|
| 14 | #### Default value when empty
|
| 15 | empty=''
|
| 16 | echo ${empty:-is empty}
|
| 17 | ## stdout: is empty
|
| 18 |
|
| 19 | #### Default value when unset
|
| 20 | echo ${unset-is unset}
|
| 21 | ## stdout: is unset
|
| 22 |
|
| 23 | #### Unquoted with array as default value
|
| 24 | set -- '1 2' '3 4'
|
| 25 | argv.py X${unset=x"$@"x}X
|
| 26 | argv.py X${unset=x$@x}X # If you want OSH to split, write this
|
| 27 | # osh
|
| 28 | ## STDOUT:
|
| 29 | ['Xx1', '2', '3', '4xX']
|
| 30 | ['Xx1', '2', '3', '4xX']
|
| 31 | ## END
|
| 32 | ## OK osh STDOUT:
|
| 33 | ['Xx1 2', '3 4xX']
|
| 34 | ['Xx1', '2', '3', '4xX']
|
| 35 | ## END
|
| 36 |
|
| 37 | #### Quoted with array as default value
|
| 38 | set -- '1 2' '3 4'
|
| 39 | argv.py "X${unset=x"$@"x}X"
|
| 40 | argv.py "X${unset=x$@x}X" # OSH is the same here
|
| 41 | ## STDOUT:
|
| 42 | ['Xx1 2 3 4xX']
|
| 43 | ['Xx1 2 3 4xX']
|
| 44 | ## END
|
| 45 | ## BUG bash STDOUT:
|
| 46 | ['Xx1', '2', '3', '4xX']
|
| 47 | ['Xx1 2 3 4xX']
|
| 48 | ## END
|
| 49 | ## OK osh STDOUT:
|
| 50 | ['Xx1 2', '3 4xX']
|
| 51 | ['Xx1 2 3 4xX']
|
| 52 | ## END
|
| 53 |
|
| 54 | #### Assign default with array
|
| 55 | set -- '1 2' '3 4'
|
| 56 | argv.py X${unset=x"$@"x}X
|
| 57 | argv.py "$unset"
|
| 58 | ## STDOUT:
|
| 59 | ['Xx1', '2', '3', '4xX']
|
| 60 | ['x1 2 3 4x']
|
| 61 | ## END
|
| 62 | ## OK osh STDOUT:
|
| 63 | ['Xx1 2', '3 4xX']
|
| 64 | ['x1 2 3 4x']
|
| 65 | ## END
|
| 66 |
|
| 67 | #### Assign default value when empty
|
| 68 | empty=''
|
| 69 | ${empty:=is empty}
|
| 70 | echo $empty
|
| 71 | ## stdout: is empty
|
| 72 |
|
| 73 | #### Assign default value when unset
|
| 74 | ${unset=is unset}
|
| 75 | echo $unset
|
| 76 | ## stdout: is unset
|
| 77 |
|
| 78 | #### ${v:+foo} Alternative value when empty
|
| 79 | v=foo
|
| 80 | empty=''
|
| 81 | echo ${v:+v is not empty} ${empty:+is not empty}
|
| 82 | ## stdout: v is not empty
|
| 83 |
|
| 84 | #### ${v+foo} Alternative value when unset
|
| 85 | v=foo
|
| 86 | echo ${v+v is not unset} ${unset:+is not unset}
|
| 87 | ## stdout: v is not unset
|
| 88 |
|
| 89 | #### "${x+foo}" quoted (regression)
|
| 90 | # Python's configure caught this
|
| 91 | argv.py "${with_icc+set}" = set
|
| 92 | ## STDOUT:
|
| 93 | ['', '=', 'set']
|
| 94 | ## END
|
| 95 |
|
| 96 | #### ${v+foo} and ${v:+foo} when set -u
|
| 97 | set -u
|
| 98 | v=v
|
| 99 | echo v=${v:+foo}
|
| 100 | echo v=${v+foo}
|
| 101 | unset v
|
| 102 | echo v=${v:+foo}
|
| 103 | echo v=${v+foo}
|
| 104 | ## STDOUT:
|
| 105 | v=foo
|
| 106 | v=foo
|
| 107 | v=
|
| 108 | v=
|
| 109 | ## END
|
| 110 |
|
| 111 | #### ${v-foo} and ${v:-foo} when set -u
|
| 112 | set -u
|
| 113 | v=v
|
| 114 | echo v=${v:-foo}
|
| 115 | echo v=${v-foo}
|
| 116 | unset v
|
| 117 | echo v=${v:-foo}
|
| 118 | echo v=${v-foo}
|
| 119 | ## STDOUT:
|
| 120 | v=v
|
| 121 | v=v
|
| 122 | v=foo
|
| 123 | v=foo
|
| 124 | ## END
|
| 125 |
|
| 126 | #### array and - and +
|
| 127 | case $SH in (dash) exit ;; esac
|
| 128 |
|
| 129 | shopt -s compat_array # to refer to array as scalar
|
| 130 |
|
| 131 | empty=()
|
| 132 | a1=('')
|
| 133 | a2=('' x)
|
| 134 | a3=(3 4)
|
| 135 | echo empty=${empty[@]-minus}
|
| 136 | echo a1=${a1[@]-minus}
|
| 137 | echo a1[0]=${a1[0]-minus}
|
| 138 | echo a2=${a2[@]-minus}
|
| 139 | echo a3=${a3[@]-minus}
|
| 140 | echo ---
|
| 141 |
|
| 142 | echo empty=${empty[@]+plus}
|
| 143 | echo a1=${a1[@]+plus}
|
| 144 | echo a1[0]=${a1[0]+plus}
|
| 145 | echo a2=${a2[@]+plus}
|
| 146 | echo a3=${a3[@]+plus}
|
| 147 | echo ---
|
| 148 |
|
| 149 | echo empty=${empty+plus}
|
| 150 | echo a1=${a1+plus}
|
| 151 | echo a2=${a2+plus}
|
| 152 | echo a3=${a3+plus}
|
| 153 | echo ---
|
| 154 |
|
| 155 | # Test quoted arrays too
|
| 156 | argv.py "${empty[@]-minus}"
|
| 157 | argv.py "${empty[@]+plus}"
|
| 158 | argv.py "${a1[@]-minus}"
|
| 159 | argv.py "${a1[@]+plus}"
|
| 160 | argv.py "${a1[0]-minus}"
|
| 161 | argv.py "${a1[0]+plus}"
|
| 162 | argv.py "${a2[@]-minus}"
|
| 163 | argv.py "${a2[@]+plus}"
|
| 164 | argv.py "${a3[@]-minus}"
|
| 165 | argv.py "${a3[@]+plus}"
|
| 166 |
|
| 167 | ## STDOUT:
|
| 168 | empty=minus
|
| 169 | a1=
|
| 170 | a1[0]=
|
| 171 | a2= x
|
| 172 | a3=3 4
|
| 173 | ---
|
| 174 | empty=
|
| 175 | a1=plus
|
| 176 | a1[0]=plus
|
| 177 | a2=plus
|
| 178 | a3=plus
|
| 179 | ---
|
| 180 | empty=
|
| 181 | a1=plus
|
| 182 | a2=plus
|
| 183 | a3=plus
|
| 184 | ---
|
| 185 | ['minus']
|
| 186 | []
|
| 187 | ['']
|
| 188 | ['plus']
|
| 189 | ['']
|
| 190 | ['plus']
|
| 191 | ['', 'x']
|
| 192 | ['plus']
|
| 193 | ['3', '4']
|
| 194 | ['plus']
|
| 195 | ## END
|
| 196 | ## N-I dash stdout-json: ""
|
| 197 |
|
| 198 | #### $@ and - and +
|
| 199 | echo argv=${@-minus}
|
| 200 | echo argv=${@+plus}
|
| 201 | echo argv=${@:-minus}
|
| 202 | echo argv=${@:+plus}
|
| 203 | ## STDOUT:
|
| 204 | argv=minus
|
| 205 | argv=
|
| 206 | argv=minus
|
| 207 | argv=
|
| 208 | ## END
|
| 209 | ## BUG dash STDOUT:
|
| 210 | argv=
|
| 211 | argv=plus
|
| 212 | argv=minus
|
| 213 | argv=
|
| 214 | ## END
|
| 215 |
|
| 216 | #### assoc array and - and +
|
| 217 | case $SH in (dash|mksh) exit ;; esac
|
| 218 |
|
| 219 | declare -A empty=()
|
| 220 | declare -A assoc=(['k']=v)
|
| 221 |
|
| 222 | echo empty=${empty[@]-minus}
|
| 223 | echo empty=${empty[@]+plus}
|
| 224 | echo assoc=${assoc[@]-minus}
|
| 225 | echo assoc=${assoc[@]+plus}
|
| 226 |
|
| 227 | echo ---
|
| 228 | echo empty=${empty[@]:-minus}
|
| 229 | echo empty=${empty[@]:+plus}
|
| 230 | echo assoc=${assoc[@]:-minus}
|
| 231 | echo assoc=${assoc[@]:+plus}
|
| 232 | ## STDOUT:
|
| 233 | empty=minus
|
| 234 | empty=
|
| 235 | assoc=v
|
| 236 | assoc=plus
|
| 237 | ---
|
| 238 | empty=minus
|
| 239 | empty=
|
| 240 | assoc=v
|
| 241 | assoc=plus
|
| 242 | ## END
|
| 243 | ## N-I dash/mksh stdout-json: ""
|
| 244 |
|
| 245 |
|
| 246 | #### Error when empty
|
| 247 | empty=''
|
| 248 | echo ${empty:?'is em'pty} # test eval of error
|
| 249 | echo should not get here
|
| 250 | ## stdout-json: ""
|
| 251 | ## status: 1
|
| 252 | ## OK dash status: 2
|
| 253 |
|
| 254 | #### Error when unset
|
| 255 | echo ${unset?is empty}
|
| 256 | echo should not get here
|
| 257 | ## stdout-json: ""
|
| 258 | ## status: 1
|
| 259 | ## OK dash status: 2
|
| 260 |
|
| 261 | #### Error when unset
|
| 262 | v=foo
|
| 263 | echo ${v+v is not unset} ${unset:+is not unset}
|
| 264 | ## stdout: v is not unset
|
| 265 |
|
| 266 | #### ${var=x} dynamic scope
|
| 267 | f() { : "${hello:=x}"; echo $hello; }
|
| 268 | f
|
| 269 | echo hello=$hello
|
| 270 |
|
| 271 | f() { hello=x; }
|
| 272 | f
|
| 273 | echo hello=$hello
|
| 274 | ## STDOUT:
|
| 275 | x
|
| 276 | hello=x
|
| 277 | hello=x
|
| 278 | ## END
|
| 279 |
|
| 280 | #### array ${arr[0]=x}
|
| 281 | arr=()
|
| 282 | echo ${#arr[@]}
|
| 283 | : ${arr[0]=x}
|
| 284 | echo ${#arr[@]}
|
| 285 | ## STDOUT:
|
| 286 | 0
|
| 287 | 1
|
| 288 | ## END
|
| 289 | ## N-I dash status: 2
|
| 290 | ## N-I dash stdout-json: ""
|
| 291 |
|
| 292 | #### assoc array ${arr["k"]=x}
|
| 293 | # note: this also works in zsh
|
| 294 |
|
| 295 | declare -A arr=()
|
| 296 | echo ${#arr[@]}
|
| 297 | : ${arr['k']=x}
|
| 298 | echo ${#arr[@]}
|
| 299 | ## STDOUT:
|
| 300 | 0
|
| 301 | 1
|
| 302 | ## END
|
| 303 | ## N-I dash status: 2
|
| 304 | ## N-I dash stdout-json: ""
|
| 305 | ## N-I mksh status: 1
|
| 306 | ## N-I mksh stdout-json: ""
|
| 307 |
|
| 308 | #### "\z" as arg
|
| 309 | echo "${undef-\$}"
|
| 310 | echo "${undef-\(}"
|
| 311 | echo "${undef-\z}"
|
| 312 | echo "${undef-\"}"
|
| 313 | echo "${undef-\`}"
|
| 314 | echo "${undef-\\}"
|
| 315 | ## STDOUT:
|
| 316 | $
|
| 317 | \(
|
| 318 | \z
|
| 319 | "
|
| 320 | `
|
| 321 | \
|
| 322 | ## END
|
| 323 | ## BUG yash STDOUT:
|
| 324 | $
|
| 325 | (
|
| 326 | z
|
| 327 | "
|
| 328 | `
|
| 329 | \
|
| 330 | ## END
|
| 331 |
|
| 332 | #### "\e" as arg
|
| 333 | echo "${undef-\e}"
|
| 334 | ## STDOUT:
|
| 335 | \e
|
| 336 | ## END
|
| 337 | ## BUG zsh/mksh stdout-repr: '\x1b\n'
|
| 338 | ## BUG yash stdout: e
|
| 339 |
|