| 1 | ## our_shell: ysh
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| 2 |
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| 3 | #### For loop over expression: List
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| 4 | var mylist = [1, 2, 3]
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| 5 | for item in (mylist) {
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| 6 | echo "item $item"
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| 7 | }
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| 8 |
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| 9 | ## STDOUT:
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| 10 | item 1
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| 11 | item 2
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| 12 | item 3
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| 13 | ## END
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| 14 |
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| 15 | #### For loop over expression: Dict, not BashAssoc
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| 16 |
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| 17 | var mydict = {name: 'bob', age: 40}
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| 18 | for key in (mydict) {
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| 19 | echo "key $key"
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| 20 | }
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| 21 |
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| 22 | declare -A A=([name]=bob)
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| 23 | for key in (A) {
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| 24 | echo "key $key"
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| 25 | }
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| 26 |
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| 27 | ## status: 3
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| 28 | ## STDOUT:
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| 29 | key name
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| 30 | key age
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| 31 | ## END
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| 32 |
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| 33 |
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| 34 | #### For loop over range
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| 35 | var myrange = 0 ..< 3
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| 36 | for i in (myrange) {
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| 37 | echo "i $i"
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| 38 | }
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| 39 |
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| 40 | ## STDOUT:
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| 41 | i 0
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| 42 | i 1
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| 43 | i 2
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| 44 | ## END
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| 45 |
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| 46 | #### Shell for loop with index (equivalent of enumerate())
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| 47 | for i, item in a b c {
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| 48 | echo "$i $item"
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| 49 | }
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| 50 | ## STDOUT:
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| 51 | 0 a
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| 52 | 1 b
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| 53 | 2 c
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| 54 | ## END
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| 55 |
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| 56 | #### 3 indices with (mylist) is a runtime error
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| 57 | for i, item bad in (['foo', 'bar']) {
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| 58 | echo "$i $item $bad"
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| 59 | }
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| 60 | ## status: 2
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| 61 |
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| 62 | #### Shell for loop can't have 3 indices
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| 63 | for i, bad, bad in a b c {
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| 64 | echo $i $item
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| 65 | }
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| 66 | ## status: 2
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| 67 |
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| 68 | #### Any for loop can't have 4 indices
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| 69 | for a, b, c, d in (['foo']) {
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| 70 | echo $i $item
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| 71 | }
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| 72 | ## status: 2
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| 73 |
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| 74 | #### Expression for loop with index: List
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| 75 | for i, item in (['spam', 'eggs']) {
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| 76 | echo "$i $item"
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| 77 | }
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| 78 | ## STDOUT:
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| 79 | 0 spam
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| 80 | 1 eggs
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| 81 | ## END
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| 82 |
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| 83 | #### Expression for loop with index: Dict (TODO: define dict iter order)
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| 84 | for key, value in ({name: 'bob', age: 40}) {
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| 85 | echo "pair $key $value"
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| 86 | }
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| 87 | ## STDOUT:
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| 88 | pair name bob
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| 89 | pair age 40
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| 90 | ## END
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| 91 |
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| 92 | #### Dict: index key value loop (TODO: define dict iter order)
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| 93 | for i, key, value in ({name: 'bob', age: 40}) {
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| 94 | echo "entry $i $key $value"
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| 95 | }
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| 96 | ## STDOUT:
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| 97 | entry 0 name bob
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| 98 | entry 1 age 40
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| 99 | ## END
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| 100 |
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| 101 |
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| 102 | #### Equivalent of zip()
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| 103 |
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| 104 | var array = :| d e f |
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| 105 |
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| 106 | for i, item in a b c {
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| 107 | echo "$i $item $[array[i]]"
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| 108 | }
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| 109 |
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| 110 | ## STDOUT:
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| 111 | 0 a d
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| 112 | 1 b e
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| 113 | 2 c f
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| 114 | ## END
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| 115 |
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| 116 | #### parse_bare_word eliminates confusion
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| 117 |
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| 118 | shopt --unset parse_bare_word
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| 119 |
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| 120 | for x in mylist { # THIS FAILS
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| 121 | echo "BAD $x"
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| 122 | }
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| 123 |
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| 124 | ## status: 2
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| 125 | ## STDOUT:
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| 126 | ## END
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| 127 |
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| 128 |
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| 129 | #### Object that's not iterable
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| 130 |
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| 131 | echo hi
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| 132 | for x in (42) {
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| 133 | echo $x
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| 134 | }
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| 135 |
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| 136 | ## status: 3
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| 137 | ## STDOUT:
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| 138 | hi
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| 139 | ## END
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| 140 |
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| 141 | #### YSH for with brace substitution and glob
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| 142 |
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| 143 | touch {foo,bar}.py
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| 144 | for i, file in *.py {README,foo}.md {
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| 145 | echo "$i $file"
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| 146 | }
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| 147 | ## STDOUT:
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| 148 | 0 bar.py
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| 149 | 1 foo.py
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| 150 | 2 README.md
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| 151 | 3 foo.md
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| 152 | ## END
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| 153 |
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| 154 | #### for x in (io.stdin) {
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| 155 |
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| 156 | # to avoid stdin conflict
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| 157 |
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| 158 | $[ENV.SH] $[ENV.REPO_ROOT]/spec/testdata/ysh-for-stdin.ysh
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| 159 |
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| 160 | ## STDOUT:
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| 161 | -1-
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| 162 | -2-
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| 163 | -3-
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| 164 |
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| 165 | 0 1
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| 166 | 1 2
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| 167 | 2 3
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| 168 |
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| 169 | empty
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| 170 | done
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| 171 |
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| 172 | empty2
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| 173 | done2
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| 174 |
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| 175 | space
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| 176 | hi
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| 177 | ## END
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| 178 |
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| 179 | #### I/O error in for x in (stdin) {
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| 180 |
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| 181 | set +o errexit
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| 182 |
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| 183 | # EISDIR - stdin descriptor is dir
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| 184 | $[ENV.SH] -c 'for x in (io.stdin) { echo $x }' < /
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| 185 | if test $? -ne 0; then
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| 186 | echo pass
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| 187 | fi
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| 188 |
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| 189 | ## STDOUT:
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| 190 | pass
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| 191 | ## END
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| 192 |
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| 193 | #### Append to List in loop extends the loop (matches JS)
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| 194 |
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| 195 | # see demo/survey-loop
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| 196 |
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| 197 | var mylist = [1,2,3]
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| 198 | for x in (mylist) {
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| 199 | if (x === 2) {
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| 200 | call mylist->append(99)
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| 201 | }
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| 202 | echo $x
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| 203 | }
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| 204 | ## STDOUT:
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| 205 | 1
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| 206 | 2
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| 207 | 3
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| 208 | 99
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| 209 | ## END
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| 210 |
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| 211 | #### Remove from List in loop shortens it (matches JS)
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| 212 |
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| 213 | # see demo/survey-loop
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| 214 |
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| 215 | var mylist = [1,2,3,4]
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| 216 | for x in (mylist) {
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| 217 | if (x === 2) {
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| 218 | call mylist->pop()
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| 219 | }
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| 220 | echo $x
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| 221 | }
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| 222 | ## STDOUT:
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| 223 | 1
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| 224 | 2
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| 225 | 3
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| 226 | ## END
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| 227 |
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| 228 | #### Adding to Dict in loop does NOT extend the loop (matches JS)
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| 229 |
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| 230 | # see demo/survey-loop
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| 231 |
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| 232 | var mydict = {"1": null, "2": null, "3": null}
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| 233 | for x in (mydict) {
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| 234 | if (x === "2") {
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| 235 | setvar mydict["99"] = null
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| 236 | }
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| 237 | echo $x
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| 238 | }
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| 239 | ## STDOUT:
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| 240 | 1
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| 241 | 2
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| 242 | 3
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| 243 | ## END
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| 244 |
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| 245 | #### Removing from Dict in loop does NOT change the loop (does NOT match JS)
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| 246 |
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| 247 | # see demo/survey-loop
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| 248 |
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| 249 | var mydict = {"1": null, "2": null, "3": null, "4": null}
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| 250 | for x in (mydict) {
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| 251 | if (x === "2") {
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| 252 | call mydict->erase("1")
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| 253 | call mydict->erase("3")
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| 254 | }
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| 255 | echo $x
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| 256 | }
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| 257 | ## STDOUT:
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| 258 | 1
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| 259 | 2
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| 260 | 3
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| 261 | 4
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| 262 | ## END
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