| 1 | 
 | 
| 2 | #### command sub $(echo hi)
 | 
| 3 | var x = $(echo hi)
 | 
| 4 | var y = $(echo '')
 | 
| 5 | # Make sure we can operate on these values
 | 
| 6 | echo x=${x:-default} y=${y:-default}
 | 
| 7 | ## STDOUT:
 | 
| 8 | x=hi y=default
 | 
| 9 | ## END
 | 
| 10 | 
 | 
| 11 | #### shell array %(a 'b c')
 | 
| 12 | shopt -s parse_at
 | 
| 13 | var x = %(a 'b c')
 | 
| 14 | var empty = %()
 | 
| 15 | argv.py / @x @empty /
 | 
| 16 | 
 | 
| 17 | ## STDOUT:
 | 
| 18 | ['/', 'a', 'b c', '/']
 | 
| 19 | ## END
 | 
| 20 | 
 | 
| 21 | #### empty array and simple_word_eval (regression test)
 | 
| 22 | shopt -s parse_at simple_word_eval
 | 
| 23 | var empty = :| |
 | 
| 24 | echo len=$[len(empty)]
 | 
| 25 | argv.py / @empty /
 | 
| 26 | 
 | 
| 27 | ## STDOUT:
 | 
| 28 | len=0
 | 
| 29 | ['/', '/']
 | 
| 30 | ## END
 | 
| 31 | 
 | 
| 32 | #### Empty array and assignment builtin (regression)
 | 
| 33 | # Bug happens with shell arrays too
 | 
| 34 | empty=()
 | 
| 35 | declare z=1 "${empty[@]}"
 | 
| 36 | echo z=$z
 | 
| 37 | ## STDOUT:
 | 
| 38 | z=1
 | 
| 39 | ## END
 | 
| 40 | 
 | 
| 41 | #### Shell arrays support tilde detection, static globbing, brace detection
 | 
| 42 | shopt -s parse_at simple_word_eval
 | 
| 43 | touch {foo,bar}.py
 | 
| 44 | HOME=/home/bob
 | 
| 45 | no_dynamic_glob='*.py'
 | 
| 46 | 
 | 
| 47 | var x = %(~/src *.py {andy,bob}@example.com $no_dynamic_glob)
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| 48 | argv.py @x
 | 
| 49 | ## STDOUT:
 | 
| 50 | ['/home/bob/src', 'bar.py', 'foo.py', 'andy@example.com', 'bob@example.com', '*.py']
 | 
| 51 | ## END
 | 
| 52 | 
 | 
| 53 | #### Set $HOME using 'var' (i.e. Oil string var in word evaluator)
 | 
| 54 | var HOME = "foo"
 | 
| 55 | echo $HOME
 | 
| 56 | echo ~
 | 
| 57 | ## STDOUT:
 | 
| 58 | foo
 | 
| 59 | foo
 | 
| 60 | ## END
 | 
| 61 | 
 | 
| 62 | #### Use shell var in Oil expression
 | 
| 63 | x='abc'
 | 
| 64 | var length = len(x)  # length in BYTES, unlike ${#x}
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| 65 | echo $length
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| 66 | ## STDOUT:
 | 
| 67 | 3
 | 
| 68 | ## END
 | 
| 69 | 
 | 
| 70 | #### Length doesn't apply to BashArray
 | 
| 71 | x=(a b c)
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| 72 | x[10]=A
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| 73 | x[20]=B
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| 74 | 
 | 
| 75 | # shell style: length is 5
 | 
| 76 | echo shell=${#x[@]}
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| 77 | 
 | 
| 78 | # Length could be 20, but we may change the representation to Dict[int, str]
 | 
| 79 | echo ysh=$[len(x)]
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| 80 | 
 | 
| 81 | ## status: 3
 | 
| 82 | ## STDOUT:
 | 
| 83 | shell=5
 | 
| 84 | ## END
 | 
| 85 | 
 | 
| 86 | #### $[len(x)] inside strings
 | 
| 87 | var s = "abc"
 | 
| 88 | echo -$[len(s)]-
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| 89 | 
 | 
| 90 | # This already has a meaning ...
 | 
| 91 | #echo "-$len(x)-"
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| 92 | #echo "-${len}(x)-"
 | 
| 93 | 
 | 
| 94 | ## STDOUT:
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| 95 | -3-
 | 
| 96 | ## END
 | 
| 97 | 
 | 
| 98 | #### Func with multiple args in multiple contexts
 | 
| 99 | shopt --set ysh:upgrade  # needed for math.ysh
 | 
| 100 | 
 | 
| 101 | source --builtin math.ysh
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| 102 | 
 | 
| 103 | var x = max(1+2, 3+4)
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| 104 | echo $x $[max(1+2, 3+4)]
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| 105 | 
 | 
| 106 | ## STDOUT:
 | 
| 107 | 7 7
 | 
| 108 | ## END
 | 
| 109 | 
 | 
| 110 | 
 | 
| 111 | #### Trailing Comma in Param list
 | 
| 112 | shopt --set ysh:upgrade  # needed for math.ysh
 | 
| 113 | 
 | 
| 114 | source --builtin math.ysh
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| 115 | 
 | 
| 116 | var x = max(1+2, 3+4,)
 | 
| 117 | echo $x $[max(1+2, 3+4,)]
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| 118 | 
 | 
| 119 | ## STDOUT:
 | 
| 120 | 7 7
 | 
| 121 | ## END
 | 
| 122 | 
 | 
| 123 | #### nested expr contexts
 | 
| 124 | var s = "123"
 | 
| 125 | 
 | 
| 126 | # lex_mode_e.ShCommand -> Expr -> ShCommand -> Expr
 | 
| 127 | var x = $(echo $'len\n' $[len(s)])
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| 128 | echo $x
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| 129 | ## STDOUT:
 | 
| 130 | len 3
 | 
| 131 | ## END
 | 
| 132 | 
 | 
| 133 | 
 | 
| 134 | # TODO:
 | 
| 135 | # - test keyword args
 | 
| 136 | # - test splatting *args, **kwargs
 | 
| 137 | # - Multiline parsing
 | 
| 138 | #
 | 
| 139 | # var x = max(
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| 140 | #   1+2,
 | 
| 141 | #   3+4,
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| 142 | # )
 | 
| 143 | # echo $x $max(
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| 144 | #   1+2,
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| 145 | #   3+4,
 | 
| 146 | # )
 | 
| 147 | 
 | 
| 148 | #### YSH var used with shell arithmetic
 | 
| 149 | var w = "3"
 | 
| 150 | echo lt=$(( w < 4 ))
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| 151 | echo gt=$(( w > 4 ))
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| 152 | 
 | 
| 153 | var z = 3
 | 
| 154 | echo lt=$(( z < 4 ))
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| 155 | echo gt=$(( z > 4 ))
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| 156 | ## STDOUT:
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| 157 | lt=1
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| 158 | gt=0
 | 
| 159 | lt=1
 | 
| 160 | gt=0
 | 
| 161 | ## END
 | 
| 162 | 
 | 
| 163 | #### Parse { var x = 42 }
 | 
| 164 | shopt -s oil:upgrade
 | 
| 165 | g() { var x = 42 }
 | 
| 166 | 
 | 
| 167 | var x = 1
 | 
| 168 | f() { var x = 42; setvar x = 43 }
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| 169 | f
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| 170 | echo x=$x
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| 171 | ## STDOUT:
 | 
| 172 | x=1
 | 
| 173 | ## END
 | 
| 174 | 
 | 
| 175 | #### double quoted
 | 
| 176 | var foo = "bar"
 | 
| 177 | var x = "-$foo-${foo}-${undef:-default}-"
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| 178 | echo $x
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| 179 | ## STDOUT:
 | 
| 180 | -bar-bar-default-
 | 
| 181 | ## END
 | 
| 182 | 
 | 
| 183 | #### double quoted respects strict_array
 | 
| 184 | shopt -s strict:all
 | 
| 185 | declare -a a=(one two three)
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| 186 | var x = "-${a[@]}-"
 | 
| 187 | echo $x
 | 
| 188 | ## status: 1
 | 
| 189 | ## stdout-json: ""
 | 
| 190 | 
 | 
| 191 | #### simple var sub $name $0 $1 $? etc.
 | 
| 192 | ( exit 42 )
 | 
| 193 | var status = $?
 | 
| 194 | echo status=$status
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| 195 | 
 | 
| 196 | set -- a b c
 | 
| 197 | var one = $1
 | 
| 198 | var two = $2
 | 
| 199 | echo $one $two
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| 200 | 
 | 
| 201 | var named = "$one"  # equivalent to 'one'
 | 
| 202 | echo named=$named
 | 
| 203 | 
 | 
| 204 | ## STDOUT:
 | 
| 205 | status=42
 | 
| 206 | a b
 | 
| 207 | named=a
 | 
| 208 | ## END
 | 
| 209 | 
 | 
| 210 | #### braced var sub ${x:-default}
 | 
| 211 | 
 | 
| 212 | # without double quotes
 | 
| 213 | 
 | 
| 214 | var b = ${foo:-default}
 | 
| 215 | echo $b
 | 
| 216 | var c = ${bar:-"-$b-"}
 | 
| 217 | echo $c
 | 
| 218 | 
 | 
| 219 | var d = "${bar:-"-$c-"}"  # another one
 | 
| 220 | echo $d
 | 
| 221 | 
 | 
| 222 | ## STDOUT:
 | 
| 223 | default
 | 
| 224 | -default-
 | 
| 225 | --default--
 | 
| 226 | ## END
 | 
| 227 | 
 | 
| 228 | #### braced var sub respects strict_array
 | 
| 229 | set -- a b c
 | 
| 230 | var x = ${undef:-"$@"}
 | 
| 231 | echo $x
 | 
| 232 | shopt -s strict_array
 | 
| 233 | setvar x = ${undef:-"$@"}
 | 
| 234 | echo $x
 | 
| 235 | ## status: 1
 | 
| 236 | ## STDOUT:
 | 
| 237 | a b c
 | 
| 238 | ## END
 | 
| 239 | 
 | 
| 240 | 
 | 
| 241 | #### null / true / false
 | 
| 242 | shopt -s oil:upgrade
 | 
| 243 | var n = null
 | 
| 244 | if (n) {
 | 
| 245 |   echo yes
 | 
| 246 | } else {
 | 
| 247 |   echo no
 | 
| 248 | }
 | 
| 249 | var t = true
 | 
| 250 | if (t) {
 | 
| 251 |   echo yes
 | 
| 252 | } else {
 | 
| 253 |   echo no
 | 
| 254 | }
 | 
| 255 | var f = false
 | 
| 256 | if (f) {
 | 
| 257 |   echo yes
 | 
| 258 | } else {
 | 
| 259 |   echo no
 | 
| 260 | }
 | 
| 261 | ## STDOUT:
 | 
| 262 | no
 | 
| 263 | yes
 | 
| 264 | no
 | 
| 265 | ## END
 | 
| 266 | 
 | 
| 267 | #### Integer literals
 | 
| 268 | var d = 123
 | 
| 269 | var b = 0b11
 | 
| 270 | var o = 0o123
 | 
| 271 | var h = 0xff
 | 
| 272 | echo $d $b $o $h
 | 
| 273 | ## STDOUT:
 | 
| 274 | 123 3 83 255
 | 
| 275 | ## END
 | 
| 276 | 
 | 
| 277 | #### Integer literals with underscores
 | 
| 278 | const dec = 65_536
 | 
| 279 | const bin = 0b0001_0101
 | 
| 280 | const oct = 0o001_755
 | 
| 281 | const hex = 0x0001_000f
 | 
| 282 | 
 | 
| 283 | echo SHELL
 | 
| 284 | echo $dec
 | 
| 285 | echo $bin
 | 
| 286 | echo $oct
 | 
| 287 | echo $hex
 | 
| 288 | const x = 1_1 + 0b1_1 + 0o1_1 + 0x1_1
 | 
| 289 | echo sum $x
 | 
| 290 | 
 | 
| 291 | # This works under Python 3.6, but the continuous build has earlier versions
 | 
| 292 | if false; then
 | 
| 293 |   echo ---
 | 
| 294 |   echo PYTHON
 | 
| 295 | 
 | 
| 296 |   python3 -c '
 | 
| 297 |   print(65_536)
 | 
| 298 |   print(0b0001_0101)
 | 
| 299 |   print(0o001_755)
 | 
| 300 |   print(0x0001_000f)
 | 
| 301 | 
 | 
| 302 |   # Weird syntax
 | 
| 303 |   print("sum", 1_1 + 0b1_1 + 0o1_1 + 0x1_1)
 | 
| 304 |   '
 | 
| 305 | fi
 | 
| 306 | 
 | 
| 307 | ## STDOUT:
 | 
| 308 | SHELL
 | 
| 309 | 65536
 | 
| 310 | 21
 | 
| 311 | 1005
 | 
| 312 | 65551
 | 
| 313 | sum 40
 | 
| 314 | ## END
 | 
| 315 | 
 | 
| 316 | #### Backslash char literal (is an integer)
 | 
| 317 | const newline = \n
 | 
| 318 | const backslash = \\
 | 
| 319 | const sq = \'
 | 
| 320 | const dq = \"
 | 
| 321 | echo "$newline $backslash $sq $dq"
 | 
| 322 | ## STDOUT:
 | 
| 323 | 10 92 39 34
 | 
| 324 | ## END
 | 
| 325 | 
 | 
| 326 | #### \u{3bc} is char literal
 | 
| 327 | shopt -s oil:all
 | 
| 328 | 
 | 
| 329 | var mu = \u{3bc}
 | 
| 330 | if (mu === 0x3bc) {  # this is the same!
 | 
| 331 |   echo 'yes'
 | 
| 332 | }
 | 
| 333 | echo "mu $mu"
 | 
| 334 | ## STDOUT:
 | 
| 335 | yes
 | 
| 336 | mu 956
 | 
| 337 | ## END
 | 
| 338 | 
 | 
| 339 | #### Exponentiation with **
 | 
| 340 | var x = 2**3
 | 
| 341 | echo $x
 | 
| 342 | 
 | 
| 343 | var y = 2.0 ** 3.0  # NOT SUPPORTED
 | 
| 344 | echo 'should not get here'
 | 
| 345 | 
 | 
| 346 | ## status: 3
 | 
| 347 | ## STDOUT:
 | 
| 348 | 8
 | 
| 349 | ## END
 | 
| 350 | 
 | 
| 351 | #### Float Division
 | 
| 352 | pp line (5/2)
 | 
| 353 | pp line (-5/2)
 | 
| 354 | pp line (5/-2)
 | 
| 355 | pp line (-5/-2)
 | 
| 356 | 
 | 
| 357 | echo ---
 | 
| 358 | 
 | 
| 359 | var x = 9
 | 
| 360 | setvar x /= 2
 | 
| 361 | pp line (x)
 | 
| 362 | 
 | 
| 363 | var x = -9
 | 
| 364 | setvar x /= 2
 | 
| 365 | pp line (x)
 | 
| 366 | 
 | 
| 367 | var x = 9
 | 
| 368 | setvar x /= -2
 | 
| 369 | pp line (x)
 | 
| 370 | 
 | 
| 371 | var x = -9
 | 
| 372 | setvar x /= -2
 | 
| 373 | pp line (x)
 | 
| 374 | 
 | 
| 375 | 
 | 
| 376 | ## STDOUT:
 | 
| 377 | (Float)   2.5
 | 
| 378 | (Float)   -2.5
 | 
| 379 | (Float)   -2.5
 | 
| 380 | (Float)   2.5
 | 
| 381 | ---
 | 
| 382 | (Float)   4.5
 | 
| 383 | (Float)   -4.5
 | 
| 384 | (Float)   -4.5
 | 
| 385 | (Float)   4.5
 | 
| 386 | ## END
 | 
| 387 | 
 | 
| 388 | #### Integer Division (rounds toward zero)
 | 
| 389 | pp line (5//2)
 | 
| 390 | pp line (-5//2)
 | 
| 391 | pp line (5//-2)
 | 
| 392 | pp line (-5//-2)
 | 
| 393 | 
 | 
| 394 | echo ---
 | 
| 395 | 
 | 
| 396 | var x = 9
 | 
| 397 | setvar x //= 2
 | 
| 398 | pp line (x)
 | 
| 399 | 
 | 
| 400 | var x = -9
 | 
| 401 | setvar x //= 2
 | 
| 402 | pp line (x)
 | 
| 403 | 
 | 
| 404 | var x = 9
 | 
| 405 | setvar x //= -2
 | 
| 406 | pp line (x)
 | 
| 407 | 
 | 
| 408 | var x = -9
 | 
| 409 | setvar x //= -2
 | 
| 410 | pp line (x)
 | 
| 411 | 
 | 
| 412 | ## STDOUT:
 | 
| 413 | (Int)   2
 | 
| 414 | (Int)   -2
 | 
| 415 | (Int)   -2
 | 
| 416 | (Int)   2
 | 
| 417 | ---
 | 
| 418 | (Int)   4
 | 
| 419 | (Int)   -4
 | 
| 420 | (Int)   -4
 | 
| 421 | (Int)   4
 | 
| 422 | ## END
 | 
| 423 | 
 | 
| 424 | #### % operator is remainder
 | 
| 425 | pp line ( 5 % 3)
 | 
| 426 | pp line (-5 % 3)
 | 
| 427 | 
 | 
| 428 | # negative divisor illegal (tested in test/ysh-runtime-errors.sh)
 | 
| 429 | #pp line ( 5 % -3)
 | 
| 430 | #pp line (-5 % -3)
 | 
| 431 | 
 | 
| 432 | var z = 10
 | 
| 433 | setvar z %= 3
 | 
| 434 | pp line (z)
 | 
| 435 | 
 | 
| 436 | var z = -10
 | 
| 437 | setvar z %= 3
 | 
| 438 | pp line (z)
 | 
| 439 | 
 | 
| 440 | ## STDOUT:
 | 
| 441 | (Int)   2
 | 
| 442 | (Int)   -2
 | 
| 443 | (Int)   1
 | 
| 444 | (Int)   -1
 | 
| 445 | ## END
 | 
| 446 | 
 | 
| 447 | #### Bitwise logical
 | 
| 448 | var a = 0b0101 & 0b0011
 | 
| 449 | echo $a
 | 
| 450 | var b = 0b0101 | 0b0011
 | 
| 451 | echo $b
 | 
| 452 | var c = 0b0101 ^ 0b0011
 | 
| 453 | echo $c
 | 
| 454 | var d = ~b
 | 
| 455 | echo $d
 | 
| 456 | ## STDOUT:
 | 
| 457 | 1
 | 
| 458 | 7
 | 
| 459 | 6
 | 
| 460 | -8
 | 
| 461 | ## END
 | 
| 462 | 
 | 
| 463 | #### Shift operators
 | 
| 464 | var a = 1 << 4
 | 
| 465 | echo $a
 | 
| 466 | var b = 16 >> 4
 | 
| 467 | echo $b
 | 
| 468 | ## STDOUT:
 | 
| 469 | 16
 | 
| 470 | 1
 | 
| 471 | ## END
 | 
| 472 | 
 | 
| 473 | #### multiline strings, list, tuple syntax for list, etc.
 | 
| 474 | var dq = "
 | 
| 475 | dq
 | 
| 476 | 2
 | 
| 477 | "
 | 
| 478 | echo dq=$[len(dq)]
 | 
| 479 | 
 | 
| 480 | var sq = '
 | 
| 481 | sq
 | 
| 482 | 2
 | 
| 483 | '
 | 
| 484 | echo sq=$[len(sq)]
 | 
| 485 | 
 | 
| 486 | var mylist = [
 | 
| 487 |   1,
 | 
| 488 |   2,
 | 
| 489 |   3,
 | 
| 490 | ]
 | 
| 491 | echo mylist=$[len(mylist)]
 | 
| 492 | 
 | 
| 493 | var mytuple = (1,
 | 
| 494 |   2, 3)
 | 
| 495 | echo mytuple=$[len(mytuple)]
 | 
| 496 | 
 | 
| 497 | ## STDOUT:
 | 
| 498 | dq=6
 | 
| 499 | sq=6
 | 
| 500 | mylist=3
 | 
| 501 | mytuple=3
 | 
| 502 | ## END
 | 
| 503 | 
 | 
| 504 | #### multiline dict
 | 
| 505 | 
 | 
| 506 | # Note: a pair has to be all on one line.  We could relax that but there isn't
 | 
| 507 | # a strong reason to now.
 | 
| 508 | 
 | 
| 509 | var mydict = { a:1,
 | 
| 510 |   b: 2,
 | 
| 511 | }
 | 
| 512 | echo mydict=$[len(mydict)]
 | 
| 513 | ## STDOUT:
 | 
| 514 | mydict=2
 | 
| 515 | ## END
 | 
| 516 | 
 | 
| 517 | #### multiline array and command sub (only here docs disallowed)
 | 
| 518 | var array = %(
 | 
| 519 |   one
 | 
| 520 |   two
 | 
| 521 |   three
 | 
| 522 | )
 | 
| 523 | echo array=$[len(array)]
 | 
| 524 | 
 | 
| 525 | var comsub = $(
 | 
| 526 | echo hi
 | 
| 527 | echo bye
 | 
| 528 | )
 | 
| 529 | echo comsub=$[len(comsub)]
 | 
| 530 | 
 | 
| 531 | ## STDOUT:
 | 
| 532 | array=3
 | 
| 533 | comsub=6
 | 
| 534 | ## END
 | 
| 535 | 
 | 
| 536 | #### obj->method()
 | 
| 537 | var s = 'hi'
 | 
| 538 | 
 | 
| 539 | # TODO: This does a bound method thing we probably don't want
 | 
| 540 | var s2 = s=>upper()
 | 
| 541 | echo $s2
 | 
| 542 | ## STDOUT:
 | 
| 543 | HI
 | 
| 544 | ## END
 | 
| 545 | 
 | 
| 546 | #### obj->method does NOT give you a bound method
 | 
| 547 | var s = 'hi'
 | 
| 548 | var method = s->upper
 | 
| 549 | echo $method
 | 
| 550 | ## status: 3
 | 
| 551 | ## stdout-json: ""
 | 
| 552 | 
 | 
| 553 | #### d.key
 | 
| 554 | var d = {name: 'andy'}
 | 
| 555 | var x = d.name
 | 
| 556 | echo $x
 | 
| 557 | ## STDOUT:
 | 
| 558 | andy
 | 
| 559 | ## END
 | 
| 560 | 
 | 
| 561 | #### a ++ b for string/list concatenation
 | 
| 562 | shopt -s parse_brace
 | 
| 563 | 
 | 
| 564 | var i = 'abc'
 | 
| 565 | var j = 'de'
 | 
| 566 | var k = i ++ j
 | 
| 567 | echo string $k
 | 
| 568 | 
 | 
| 569 | 
 | 
| 570 | var a = [1, 2]
 | 
| 571 | var b = [3]
 | 
| 572 | var c = a ++ b
 | 
| 573 | echo list len=$[len(c)]
 | 
| 574 | 
 | 
| 575 | echo ---
 | 
| 576 | 
 | 
| 577 | try {
 | 
| 578 |   = 'ab' ++ 3
 | 
| 579 | }
 | 
| 580 | echo Str Int $_status
 | 
| 581 | 
 | 
| 582 | try {
 | 
| 583 |   = [1, 2] ++ 3
 | 
| 584 | }
 | 
| 585 | echo List Int $_status
 | 
| 586 | 
 | 
| 587 | try {
 | 
| 588 |   = 3 ++ 'ab'
 | 
| 589 | }
 | 
| 590 | echo Int Str $_status
 | 
| 591 | 
 | 
| 592 | ## STDOUT:
 | 
| 593 | string abcde
 | 
| 594 | list len=3
 | 
| 595 | ---
 | 
| 596 | Str Int 3
 | 
| 597 | List Int 3
 | 
| 598 | Int Str 3
 | 
| 599 | ## END
 | 
| 600 | 
 | 
| 601 | #### s ~~ glob and s !~~ glob
 | 
| 602 | shopt -s oil:all
 | 
| 603 | 
 | 
| 604 | if ('foo.py' ~~ '*.py') {
 | 
| 605 |   echo yes
 | 
| 606 | }
 | 
| 607 | if ('foo.py' !~~ '*.sh') {
 | 
| 608 |   echo no
 | 
| 609 | }
 | 
| 610 | ## STDOUT:
 | 
| 611 | yes
 | 
| 612 | no
 | 
| 613 | ## END
 | 
| 614 | 
 | 
| 615 | #### Type Errors
 | 
| 616 | shopt --set parse_brace
 | 
| 617 | 
 | 
| 618 | # TODO: It might be nice to get a message
 | 
| 619 | try {
 | 
| 620 |   var x = {} + []
 | 
| 621 | }
 | 
| 622 | echo $_status
 | 
| 623 | 
 | 
| 624 | try {
 | 
| 625 |   setvar x = {} + 3
 | 
| 626 | }
 | 
| 627 | echo $_status
 | 
| 628 | 
 | 
| 629 | try {
 | 
| 630 |   = 'foo' ++ 3
 | 
| 631 | }
 | 
| 632 | echo $_status
 | 
| 633 | 
 | 
| 634 | try {
 | 
| 635 |   = 'foo' ++ 3
 | 
| 636 | }
 | 
| 637 | echo $_status
 | 
| 638 | 
 | 
| 639 | ## STDOUT:
 | 
| 640 | 3
 | 
| 641 | 3
 | 
| 642 | 3
 | 
| 643 | 3
 | 
| 644 | ## END
 | 
| 645 | 
 | 
| 646 | 
 | 
| 647 | #### can't use ++ on integers
 | 
| 648 | var x = 12 ++ 3
 | 
| 649 | echo $x
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| 650 | ## status: 3
 | 
| 651 | ## STDOUT:
 | 
| 652 | ## END
 | 
| 653 | 
 | 
| 654 | #### can't do mystr ++ mylist
 | 
| 655 | = ["s"] + "t"
 | 
| 656 | ## status: 3
 | 
| 657 | ## STDOUT:
 | 
| 658 | ## END
 | 
| 659 | 
 | 
| 660 | 
 | 
| 661 | #### expression literals
 | 
| 662 | var e = ^[1 + 2]
 | 
| 663 | 
 | 
| 664 | echo type=$[type(e)]
 | 
| 665 | echo $[evalExpr(e)]
 | 
| 666 | 
 | 
| 667 | var e = ^[2 < 1]
 | 
| 668 | echo $[evalExpr(e)]
 | 
| 669 | 
 | 
| 670 | var x = 42
 | 
| 671 | var e = ^[42 === x and true]
 | 
| 672 | echo $[evalExpr(e)]
 | 
| 673 | 
 | 
| 674 | var mylist = ^[3, 4]
 | 
| 675 | pp line (evalExpr(mylist))
 | 
| 676 | 
 | 
| 677 | ## STDOUT:
 | 
| 678 | type=Expr
 | 
| 679 | 3
 | 
| 680 | false
 | 
| 681 | true
 | 
| 682 | (List)   [3,4]
 | 
| 683 | ## END
 | 
| 684 | 
 | 
| 685 | #### No list comprehension in ^[]
 | 
| 686 | 
 | 
| 687 | var mylist = ^[x for x in y]  
 | 
| 688 | pp line (evalExpr(mylist))
 | 
| 689 | 
 | 
| 690 | ## status: 2
 | 
| 691 | ## STDOUT:
 | 
| 692 | ## END
 | 
| 693 | 
 | 
| 694 | 
 | 
| 695 | #### expression literals, evaluation failure
 | 
| 696 | var e = ^[1 / 0]
 | 
| 697 | call evalExpr(e)
 | 
| 698 | ## status: 3
 | 
| 699 | ## STDOUT:
 | 
| 700 | ## END
 | 
| 701 | 
 | 
| 702 | #### expression literals, lazy evaluation
 | 
| 703 | var x = 0
 | 
| 704 | var e = ^[x]
 | 
| 705 | 
 | 
| 706 | setvar x = 1
 | 
| 707 | echo result=$[evalExpr(e)]
 | 
| 708 | ## STDOUT:
 | 
| 709 | result=1
 | 
| 710 | ## END
 | 
| 711 | 
 | 
| 712 | #### expression literals, sugar for strings
 | 
| 713 | var x = 0
 | 
| 714 | var e = ^"x is $x"
 | 
| 715 | 
 | 
| 716 | setvar x = 1
 | 
| 717 | echo result=$[evalExpr(e)]
 | 
| 718 | ## STDOUT:
 | 
| 719 | result=x is 1
 | 
| 720 | ## END
 |