| 1 | ## oils_failures_allowed: 0
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| 2 |
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| 3 | #### Simple Expr Closure
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| 4 | shopt --set ysh:upgrade
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| 5 |
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| 6 | proc my-expr (; expr) {
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| 7 | echo $[io->evalExpr(expr)]
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| 8 | }
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| 9 |
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| 10 | proc p {
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| 11 | var i = 42
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| 12 | my-expr [i + 1]
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| 13 | }
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| 14 |
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| 15 | p
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| 16 |
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| 17 | ## STDOUT:
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| 18 | 43
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| 19 | ## END
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| 20 |
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| 21 | #### Simple Block Closure
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| 22 | shopt --set ysh:upgrade
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| 23 |
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| 24 | shopt --set ysh:upgrade
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| 25 |
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| 26 | proc my-expr (; ; ; block) {
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| 27 | call io->eval(block)
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| 28 | }
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| 29 |
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| 30 | proc p {
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| 31 | var i = 42
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| 32 | my-expr {
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| 33 | echo $[i + 1]
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| 34 | }
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| 35 | }
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| 36 |
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| 37 | p
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| 38 |
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| 39 | ## STDOUT:
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| 40 | 43
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| 41 | ## END
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| 42 |
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| 43 | #### Expr Closures in a Loop !
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| 44 | shopt --set ysh:upgrade
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| 45 |
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| 46 | proc task (; tasks, expr) {
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| 47 | call tasks->append(expr)
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| 48 | }
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| 49 |
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| 50 | func makeTasks() {
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| 51 | var tasks = []
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| 52 | var x = 'x'
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| 53 | for __hack__ in (0 .. 3) {
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| 54 | var i = __hack__
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| 55 | var j = i + 2
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| 56 | task (tasks, ^"$x: i = $i, j = $j")
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| 57 | }
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| 58 | return (tasks)
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| 59 | }
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| 60 |
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| 61 | var exprs = makeTasks()
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| 62 | #= blocks
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| 63 |
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| 64 | for ex in (exprs) {
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| 65 | var s = io->evalExpr(ex)
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| 66 | echo $s
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| 67 | }
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| 68 |
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| 69 | ## STDOUT:
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| 70 | x: i = 0, j = 2
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| 71 | x: i = 1, j = 3
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| 72 | x: i = 2, j = 4
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| 73 | ## END
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| 74 |
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| 75 | #### Block Closures in a Loop !
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| 76 | shopt --set ysh:upgrade
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| 77 |
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| 78 | proc task (; tasks; ; b) {
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| 79 | call tasks->append(b)
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| 80 | }
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| 81 |
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| 82 | func makeTasks() {
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| 83 | var tasks = []
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| 84 | var x = 'x'
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| 85 | for __hack__ in (0 .. 3) {
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| 86 | var i = __hack__
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| 87 | var j = i + 2
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| 88 | task (tasks) { echo "$x: i = $i, j = $j" }
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| 89 | }
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| 90 | return (tasks)
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| 91 | }
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| 92 |
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| 93 | var blocks = makeTasks()
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| 94 | #= blocks
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| 95 |
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| 96 | for b in (blocks) {
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| 97 | call io->eval(b)
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| 98 | }
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| 99 |
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| 100 | ## STDOUT:
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| 101 | x: i = 0, j = 2
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| 102 | x: i = 1, j = 3
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| 103 | x: i = 2, j = 4
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| 104 | ## END
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| 105 |
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| 106 |
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| 107 | #### Explicit __invoke__ for "objects in a loop", not closures in a loop
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| 108 | shopt --set ysh:upgrade
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| 109 |
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| 110 | var procs = []
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| 111 | for i in (0 .. 3) {
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| 112 | proc __invoke__ (; self) {
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| 113 | echo "i = $[self.i]"
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| 114 | }
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| 115 | var methods = Object(null, {__invoke__})
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| 116 | var obj = Object(methods, {i})
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| 117 | call procs->append(obj)
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| 118 | }
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| 119 |
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| 120 | for p in (procs) {
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| 121 | p
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| 122 | }
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| 123 |
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| 124 | # TODO: sugar
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| 125 | # proc p (; self) capture {i} {
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| 126 | # echo "i = $[self.i]"
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| 127 | # }
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| 128 | # call procs->append(p)
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| 129 |
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| 130 | ## STDOUT:
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| 131 | i = 0
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| 132 | i = 1
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| 133 | i = 2
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| 134 | ## END
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| 135 |
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| 136 |
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| 137 | #### Expr Closures in a different module
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| 138 | shopt --set ysh:upgrade
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| 139 |
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| 140 | use $REPO_ROOT/spec/testdata/module2/closure.ysh --pick {local,global}_expr
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| 141 |
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| 142 | echo $[io->evalExpr(global_expr)]
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| 143 |
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| 144 | echo $[io->evalExpr(local_expr())]
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| 145 |
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| 146 | ## STDOUT:
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| 147 | global!
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| 148 | global local!
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| 149 | ## END
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| 150 |
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| 151 |
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| 152 | #### Command Closures in a different module
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| 153 | shopt --set ysh:upgrade
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| 154 |
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| 155 | use $REPO_ROOT/spec/testdata/module2/closure.ysh --pick {local,global}_block
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| 156 |
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| 157 | call io->eval(global_block)
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| 158 |
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| 159 | call io->eval(local_block())
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| 160 |
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| 161 | ## STDOUT:
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| 162 | global!
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| 163 | global local!
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| 164 | ## END
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| 165 |
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| 166 | #### Closures as default argument
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| 167 | shopt --set ysh:upgrade
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| 168 |
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| 169 | use $REPO_ROOT/spec/testdata/module2/closure.ysh --pick default_{expr,block}
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| 170 |
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| 171 | echo $[io->evalExpr(default_expr())]
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| 172 |
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| 173 | call io->eval(default_block())
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| 174 |
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| 175 | ## STDOUT:
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| 176 | global expr!
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| 177 | global block!
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| 178 | ## END
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| 179 |
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