| 1 | ## oils_failures_allowed: 1
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| 2 |
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| 3 | #### GetValue scope and shopt --unset dynamic_scope
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| 4 | shopt --set parse_proc
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| 5 |
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| 6 | f() {
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| 7 | echo "sh x=$x"
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| 8 | }
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| 9 |
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| 10 | proc p {
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| 11 | echo "ysh x=$x"
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| 12 | }
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| 13 |
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| 14 | demo() {
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| 15 | local x=dynamic
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| 16 | f
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| 17 | p
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| 18 |
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| 19 | shopt --unset dynamic_scope
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| 20 | f
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| 21 | }
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| 22 |
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| 23 | x=global
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| 24 | demo
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| 25 | echo x=$x
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| 26 |
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| 27 | ## STDOUT:
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| 28 | sh x=dynamic
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| 29 | ysh x=global
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| 30 | sh x=global
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| 31 | x=global
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| 32 | ## END
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| 33 |
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| 34 |
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| 35 | #### SetValue scope and shopt --unset dynamic_scope
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| 36 | shopt --set parse_proc
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| 37 |
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| 38 | f() {
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| 39 | x=f
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| 40 | }
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| 41 |
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| 42 | proc p {
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| 43 | var x = 'p'
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| 44 | }
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| 45 |
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| 46 | demo() {
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| 47 | local x=stack
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| 48 | echo x=$x
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| 49 | echo ---
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| 50 |
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| 51 | f
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| 52 | echo f x=$x
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| 53 |
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| 54 | x=stack
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| 55 | p
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| 56 | echo p x=$x
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| 57 |
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| 58 | shopt --unset dynamic_scope
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| 59 | x=stack
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| 60 | f
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| 61 | echo funset x=$x
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| 62 | }
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| 63 |
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| 64 | x=global
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| 65 | demo
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| 66 |
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| 67 | echo ---
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| 68 | echo x=$x
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| 69 |
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| 70 | ## STDOUT:
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| 71 | x=stack
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| 72 | ---
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| 73 | f x=f
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| 74 | p x=stack
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| 75 | funset x=stack
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| 76 | ---
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| 77 | x=global
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| 78 | ## END
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| 79 |
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| 80 | #### read scope
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| 81 | set -o errexit
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| 82 |
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| 83 | read-x() {
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| 84 | echo dynamic-scope | read x
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| 85 | }
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| 86 | demo() {
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| 87 | local x=42
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| 88 | echo x_before=$x
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| 89 | read-x
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| 90 | echo x_after=$x
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| 91 | }
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| 92 | demo
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| 93 | echo x=$x
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| 94 |
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| 95 | echo ---
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| 96 |
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| 97 | # Now 'read x' creates a local variable
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| 98 | shopt --unset dynamic_scope
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| 99 | demo
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| 100 | echo x=$x
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| 101 |
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| 102 | ## STDOUT:
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| 103 | x_before=42
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| 104 | x_after=dynamic-scope
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| 105 | x=
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| 106 | ---
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| 107 | x_before=42
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| 108 | x_after=42
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| 109 | x=
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| 110 | ## END
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| 111 |
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| 112 | #### printf -v x respects dynamic_scope
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| 113 | set -o errexit
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| 114 |
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| 115 | set-x() {
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| 116 | printf -v x "%s" dynamic-scope
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| 117 | }
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| 118 | demo() {
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| 119 | local x=42
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| 120 | echo x=$x
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| 121 | set-x
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| 122 | echo x=$x
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| 123 | }
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| 124 | demo
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| 125 | echo x=$x
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| 126 |
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| 127 | echo ---
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| 128 |
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| 129 | shopt --unset dynamic_scope # should NOT affect read
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| 130 | demo
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| 131 | echo x=$x
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| 132 |
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| 133 | ## STDOUT:
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| 134 | x=42
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| 135 | x=dynamic-scope
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| 136 | x=
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| 137 | ---
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| 138 | x=42
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| 139 | x=42
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| 140 | x=
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| 141 | ## END
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| 142 |
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| 143 | #### printf -v a[i] respects dynamic_scope
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| 144 | set -o errexit
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| 145 |
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| 146 | set-item() {
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| 147 | printf -v 'a[1]' "%s" dynamic-scope
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| 148 | }
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| 149 | demo() {
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| 150 | local -a a=(41 42 43)
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| 151 | echo "a[1]=${a[1]}"
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| 152 | set-item
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| 153 | echo "a[1]=${a[1]}"
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| 154 | }
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| 155 | demo
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| 156 | echo "a[1]=${a[1]}"
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| 157 |
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| 158 | echo ---
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| 159 |
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| 160 | shopt --unset dynamic_scope # should NOT affect read
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| 161 | demo
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| 162 | echo "a[1]=${a[1]}"
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| 163 |
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| 164 | ## STDOUT:
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| 165 | a[1]=42
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| 166 | a[1]=dynamic-scope
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| 167 | a[1]=
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| 168 | ---
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| 169 | a[1]=42
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| 170 | a[1]=42
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| 171 | a[1]=
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| 172 | ## END
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| 173 |
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| 174 | #### ${undef=a} and shopt --unset dynamic_scope
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| 175 |
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| 176 | set-x() {
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| 177 | : ${x=new}
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| 178 | }
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| 179 | demo() {
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| 180 | local x
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| 181 | echo x=$x
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| 182 | set-x
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| 183 | echo x=$x
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| 184 | }
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| 185 |
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| 186 | demo
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| 187 | echo x=$x
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| 188 |
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| 189 | echo ---
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| 190 |
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| 191 | # Now this IS affected?
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| 192 | shopt --unset dynamic_scope
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| 193 | demo
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| 194 | echo x=$x
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| 195 | ## STDOUT:
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| 196 | x=
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| 197 | x=new
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| 198 | x=
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| 199 | ---
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| 200 | x=
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| 201 | x=
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| 202 | x=
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| 203 | ## END
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| 204 |
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| 205 | #### declare -p respects it
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| 206 |
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| 207 | ___g=G
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| 208 |
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| 209 | show-vars() {
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| 210 | local ___x=X
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| 211 | declare -p | grep '___'
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| 212 | echo status=$?
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| 213 |
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| 214 | echo -
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| 215 | declare -p ___y | grep '___'
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| 216 | echo status=$?
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| 217 | }
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| 218 |
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| 219 | demo() {
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| 220 | local ___y=Y
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| 221 |
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| 222 | show-vars
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| 223 | echo ---
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| 224 | shopt --unset dynamic_scope
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| 225 | show-vars
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| 226 | }
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| 227 |
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| 228 | demo
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| 229 |
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| 230 | ## STDOUT:
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| 231 | declare -- ___g=G
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| 232 | declare -- ___x=X
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| 233 | declare -- ___y=Y
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| 234 | status=0
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| 235 | -
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| 236 | declare -- ___y=Y
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| 237 | status=0
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| 238 | ---
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| 239 | declare -- ___g=G
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| 240 | declare -- ___x=X
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| 241 | status=0
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| 242 | -
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| 243 | status=1
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| 244 | ## END
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| 245 |
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| 246 |
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| 247 | #### OshLanguageSetValue constructs
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| 248 |
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| 249 | f() {
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| 250 | (( x = 42 ))
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| 251 | }
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| 252 | demo() {
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| 253 | f
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| 254 | echo x=$x
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| 255 | }
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| 256 |
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| 257 | demo
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| 258 |
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| 259 | echo ---
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| 260 |
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| 261 | shopt --unset dynamic_scope
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| 262 |
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| 263 | unset x
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| 264 |
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| 265 | demo
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| 266 |
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| 267 | echo --- global
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| 268 | echo x=$x
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| 269 | ## STDOUT:
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| 270 | x=42
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| 271 | ---
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| 272 | x=
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| 273 | --- global
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| 274 | x=
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| 275 | ## END
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| 276 |
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| 277 |
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| 278 | #### shell assignments 'neutered' inside 'proc'
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| 279 | shopt --set parse_proc
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| 280 |
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| 281 | # They can't mutate globals or anything higher on the stack
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| 282 |
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| 283 | proc p {
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| 284 | # TODO: declare should be disallowed in YSH, just like shell functions.
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| 285 |
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| 286 | #declare g=PROC
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| 287 | #export e=PROC
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| 288 | var g = 'PROC'
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| 289 | var e = 'PROC'
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| 290 | }
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| 291 |
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| 292 | f() {
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| 293 | g=SH
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| 294 | export e=SH
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| 295 | }
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| 296 |
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| 297 | e=E
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| 298 | g=G
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| 299 | p
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| 300 | echo e=$e g=$g
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| 301 |
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| 302 | p
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| 303 | echo e=$e g=$g
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| 304 |
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| 305 | f
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| 306 | echo e=$e g=$g
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| 307 |
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| 308 | ## STDOUT:
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| 309 | e=E g=G
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| 310 | e=E g=G
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| 311 | e=SH g=SH
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| 312 | ## END
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| 313 |
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| 314 | #### setglobal still allows setting globals
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| 315 | shopt --set parse_proc
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| 316 |
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| 317 | proc p {
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| 318 | setglobal new_global = 'p'
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| 319 | setglobal g = 'p'
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| 320 | }
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| 321 |
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| 322 | var g = 'G'
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| 323 |
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| 324 | p
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| 325 |
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| 326 | echo g=$g new_global=$new_global
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| 327 | ## STDOUT:
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| 328 | g=p new_global=p
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| 329 | ## END
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| 330 |
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| 331 | #### setglobal d[key] inside proc should mutate global (bug #1841)
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| 332 |
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| 333 | shopt -s ysh:upgrade
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| 334 |
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| 335 | var g = {}
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| 336 |
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| 337 | proc mutate {
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| 338 | var g = {'local': 1} # shadows global var
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| 339 |
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| 340 | setglobal g.key = 'mutated'
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| 341 | setglobal g['key2'] = 'mutated'
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| 342 |
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| 343 | echo 'local that is ignored'
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| 344 | pp test_ (g)
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| 345 | }
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| 346 |
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| 347 | echo 'BEFORE mutate global'
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| 348 | pp test_ (g)
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| 349 |
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| 350 | mutate
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| 351 |
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| 352 | echo 'AFTER mutate global'
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| 353 | pp test_ (g)
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| 354 |
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| 355 | ## STDOUT:
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| 356 | BEFORE mutate global
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| 357 | (Dict) {}
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| 358 | local that is ignored
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| 359 | (Dict) {"local":1}
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| 360 | AFTER mutate global
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| 361 | (Dict) {"key":"mutated","key2":"mutated"}
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| 362 | ## END
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| 363 |
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| 364 | #### setglobal a[i] inside proc
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| 365 | shopt -s ysh:upgrade
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| 366 |
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| 367 | var a = [0]
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| 368 |
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| 369 | proc mutate {
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| 370 | var a = [1] # shadows global var
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| 371 |
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| 372 | echo 'local that is ignored'
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| 373 | setglobal a[0] = 42
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| 374 |
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| 375 | pp test_ (a)
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| 376 | }
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| 377 |
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| 378 | echo 'BEFORE mutate global'
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| 379 | pp test_ (a)
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| 380 |
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| 381 | mutate
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| 382 |
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| 383 | echo 'AFTER mutate global'
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| 384 | pp test_ (a)
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| 385 |
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| 386 | ## STDOUT:
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| 387 | BEFORE mutate global
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| 388 | (List) [0]
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| 389 | local that is ignored
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| 390 | (List) [1]
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| 391 | AFTER mutate global
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| 392 | (List) [42]
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| 393 | ## END
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| 394 |
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| 395 | #### setglobal a[i] += and d.key +=
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| 396 | shopt -s ysh:upgrade
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| 397 |
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| 398 | var mylist = [0]
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| 399 | var mydict = {k: 0}
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| 400 |
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| 401 | proc mutate {
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| 402 | # these locals are ignored
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| 403 | var mylist = []
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| 404 | var mydict = {}
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| 405 |
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| 406 | setglobal mylist[0] += 5
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| 407 | setglobal mydict['k'] += 5
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| 408 | }
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| 409 |
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| 410 | mutate
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| 411 |
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| 412 | pp test_ (mylist)
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| 413 | pp test_ (mydict)
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| 414 |
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| 415 | ## STDOUT:
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| 416 | (List) [5]
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| 417 | (Dict) {"k":5}
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| 418 | ## END
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| 419 |
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| 420 | #### setglobal a[i] - i can be local or global
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| 421 | shopt -s ysh:upgrade
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| 422 |
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| 423 | var mylist = [0, 1]
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| 424 | var mydict = {k: 0, n: 1}
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| 425 |
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| 426 | var i = 0
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| 427 | var key = 'k'
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| 428 |
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| 429 | proc mutate1 {
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| 430 | var mylist = [] # IGNORED
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| 431 | var mydict = {} # IGNORED
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| 432 |
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| 433 | var i = 1
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| 434 | var key = 'n'
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| 435 |
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| 436 | setglobal mylist[i] = 11
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| 437 | setglobal mydict[key] = 11
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| 438 | }
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| 439 |
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| 440 | # Same thing without locals
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| 441 | proc mutate2 {
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| 442 | var mylist = [] # IGNORED
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| 443 | var mydict = {} # IGNORED
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| 444 |
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| 445 | setglobal mylist[i] = 22
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| 446 | setglobal mydict[key] = 22
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| 447 | }
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| 448 |
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| 449 | mutate1
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| 450 |
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| 451 | pp test_ (mylist)
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| 452 | pp test_ (mydict)
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| 453 | echo
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| 454 |
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| 455 | mutate2
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| 456 |
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| 457 | pp test_ (mylist)
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| 458 | pp test_ (mydict)
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| 459 |
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| 460 | ## STDOUT:
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| 461 | (List) [0,11]
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| 462 | (Dict) {"k":0,"n":11}
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| 463 |
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| 464 | (List) [22,11]
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| 465 | (Dict) {"k":22,"n":11}
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| 466 | ## END
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| 467 |
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| 468 | #### unset inside proc - closures and dynamic scope
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| 469 | shopt --set parse_brace
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| 470 | shopt --set parse_proc
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| 471 |
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| 472 | shellfunc() {
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| 473 | unset x
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| 474 | }
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| 475 |
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| 476 | proc unset-proc() {
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| 477 | unset x
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| 478 | }
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| 479 |
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| 480 | proc unset-proc-dynamic-scope() {
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| 481 | shopt --set dynamic_scope { # turn it back on
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| 482 | unset x
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| 483 | }
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| 484 | }
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| 485 |
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| 486 | x=foo
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| 487 | shellfunc
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| 488 | echo shellfunc x=$x
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| 489 |
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| 490 | x=bar
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| 491 | unset-proc
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| 492 | echo unset-proc x=$x
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| 493 |
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| 494 | x=spam
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| 495 | unset-proc
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| 496 | echo unset-proc-dynamic-scope x=$x
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| 497 |
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| 498 | ## STDOUT:
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| 499 | shellfunc x=
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| 500 | unset-proc x=
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| 501 | unset-proc-dynamic-scope x=
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| 502 | ## END
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| 503 |
|
| 504 | #### unset composes when you turn on dynamic scope
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| 505 | shopt -s ysh:all
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| 506 |
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| 507 | proc unset-two (v, w) {
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| 508 | shopt --set dynamic_scope {
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| 509 | unset $v
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| 510 | unset $w
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| 511 | }
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| 512 | }
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| 513 |
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| 514 | demo() {
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| 515 | local x=X
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| 516 | local y=Y
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| 517 |
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| 518 | echo "x=$x y=$y"
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| 519 |
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| 520 | unset-two x y
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| 521 |
|
| 522 | shopt --unset nounset
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| 523 | echo "x=$x y=$y"
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| 524 | }
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| 525 |
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| 526 | demo
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| 527 | ## STDOUT:
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| 528 | x=X y=Y
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| 529 | x= y=
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| 530 | ## END
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| 531 |
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| 532 | #### Temp Bindings
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| 533 | shopt --set parse_proc
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| 534 |
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| 535 | myfunc() {
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| 536 | echo myfunc FOO=$FOO
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| 537 | }
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| 538 | proc myproc() {
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| 539 | echo myproc FOO=$FOO
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| 540 | }
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| 541 |
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| 542 | FOO=bar myfunc
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| 543 | FOO=bar myproc
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| 544 | FOO=bar echo inline FOO=$FOO
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| 545 | FOO=bar printenv.py FOO
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| 546 |
|
| 547 | ## STDOUT:
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| 548 | myfunc FOO=bar
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| 549 | myproc FOO=
|
| 550 | inline FOO=
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| 551 | bar
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| 552 | ## END
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| 553 |
|
| 554 | #### cd blocks don't introduce new scopes
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| 555 | shopt --set ysh:upgrade
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| 556 |
|
| 557 | var x = 42
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| 558 | cd / {
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| 559 | var y = 0
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| 560 | var z = 1
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| 561 | echo $x $y $z
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| 562 | setvar y = 43
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| 563 | }
|
| 564 | setvar z = 44
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| 565 | echo $x $y $z
|
| 566 |
|
| 567 | ## STDOUT:
|
| 568 | 42 0 1
|
| 569 | 42 43 44
|
| 570 | ## END
|
| 571 |
|
| 572 | #### shvar IFS=x { myproc } rather than IFS=x myproc - no dynamic scope
|
| 573 |
|
| 574 | # Note: osh/split.py uses dynamic scope to look up IFS
|
| 575 | # TODO: Should use LANG example to demonstrate
|
| 576 |
|
| 577 | #shopt --set ysh:upgrade # this would disable word splitting
|
| 578 |
|
| 579 | shopt --set parse_proc
|
| 580 | shopt --set parse_brace
|
| 581 | #shopt --set env_obj
|
| 582 |
|
| 583 | s='xzx zxz'
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| 584 |
|
| 585 | shellfunc() {
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| 586 | echo shellfunc IFS="$IFS"
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| 587 | argv.py $s
|
| 588 | }
|
| 589 |
|
| 590 | proc myproc() {
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| 591 | echo myproc IFS="$IFS"
|
| 592 | argv.py $s
|
| 593 | }
|
| 594 |
|
| 595 | IFS=: $REPO_ROOT/spec/bin/printenv.py IFS
|
| 596 |
|
| 597 | # default value
|
| 598 | echo "$IFS" | od -A n -t x1
|
| 599 |
|
| 600 | IFS=' z'
|
| 601 | echo IFS="$IFS"
|
| 602 | echo
|
| 603 |
|
| 604 | shellfunc
|
| 605 | echo
|
| 606 |
|
| 607 | IFS=' x' shellfunc
|
| 608 | echo
|
| 609 |
|
| 610 | # Problem: $IFS in procs only finds GLOBAL values, so we get IFS=' z' rather than IFS=' x'.
|
| 611 | # But when actually splitting, $IFS is a 'shvar' which respects DYNAMIC scope.
|
| 612 | #
|
| 613 | # Can use shvarGet('IFS') instead
|
| 614 |
|
| 615 | IFS=' x' myproc
|
| 616 | echo
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| 617 |
|
| 618 | # YSH solution to the problem
|
| 619 | shvar IFS=' x' {
|
| 620 | myproc
|
| 621 | }
|
| 622 |
|
| 623 | ## STDOUT:
|
| 624 | :
|
| 625 | 20 09 0a 0a
|
| 626 | IFS= z
|
| 627 |
|
| 628 | shellfunc IFS= z
|
| 629 | ['x', 'x', 'x']
|
| 630 |
|
| 631 | shellfunc IFS= x
|
| 632 | ['', 'z', 'z', 'z']
|
| 633 |
|
| 634 | myproc IFS= z
|
| 635 | ['x', 'x', 'x']
|
| 636 |
|
| 637 | myproc IFS= x
|
| 638 | ['', 'z', 'z', 'z']
|
| 639 | ## END
|
| 640 |
|
| 641 | #### shvar builtin syntax
|
| 642 | shopt --set ysh:upgrade
|
| 643 | shopt --unset errexit
|
| 644 |
|
| 645 | # no block
|
| 646 | shvar
|
| 647 | echo status=$?
|
| 648 |
|
| 649 | shvar { # no arg
|
| 650 | true
|
| 651 | }
|
| 652 | echo status=$?
|
| 653 |
|
| 654 | shvar foo { # should be name=value
|
| 655 | true
|
| 656 | }
|
| 657 | echo status=$?
|
| 658 | ## STDOUT:
|
| 659 | status=2
|
| 660 | status=2
|
| 661 | status=2
|
| 662 | ## END
|
| 663 |
|
| 664 |
|
| 665 | #### shvar and shvarGet() obey dynamic scope
|
| 666 |
|
| 667 | # On the other hand, in YSH
|
| 668 | # - $x does local/closure/global scope
|
| 669 | # - FOO=foo mycommand modifies the ENV object - shopt --set env_obj
|
| 670 |
|
| 671 | shopt --set ysh:all
|
| 672 |
|
| 673 | proc p3 {
|
| 674 | echo FOO=$[shvarGet('FOO')] # dynamic scope
|
| 675 | echo FOO=$FOO # fails, not dynamic scope
|
| 676 | }
|
| 677 |
|
| 678 | proc p2 {
|
| 679 | p3
|
| 680 | }
|
| 681 |
|
| 682 | proc p {
|
| 683 | shvar FOO=foo {
|
| 684 | p2
|
| 685 | }
|
| 686 | }
|
| 687 |
|
| 688 | p
|
| 689 |
|
| 690 | ## status: 1
|
| 691 | ## STDOUT:
|
| 692 | FOO=foo
|
| 693 | ## END
|
| 694 |
|
| 695 |
|
| 696 | #### shvar global
|
| 697 | shopt --set ysh:upgrade
|
| 698 | shopt --unset nounset
|
| 699 |
|
| 700 | echo _ESCAPER=$_ESCAPER
|
| 701 | echo _DIALECT=$_DIALECT
|
| 702 |
|
| 703 | shvar _ESCAPER=html _DIALECT=ninja {
|
| 704 | echo block _ESCAPER=$_ESCAPER
|
| 705 | echo block _DIALECT=$_DIALECT
|
| 706 | }
|
| 707 |
|
| 708 | echo _ESCAPER=$_ESCAPER
|
| 709 | echo _DIALECT=$_DIALECT
|
| 710 |
|
| 711 | # Now set them
|
| 712 | _ESCAPER=foo
|
| 713 | _DIALECT=bar
|
| 714 |
|
| 715 | echo ___
|
| 716 |
|
| 717 | echo _ESCAPER=$_ESCAPER
|
| 718 | echo _DIALECT=$_DIALECT
|
| 719 |
|
| 720 | shvar _ESCAPER=html _DIALECT=ninja {
|
| 721 | echo block _ESCAPER=$_ESCAPER
|
| 722 | echo block _DIALECT=$_DIALECT
|
| 723 |
|
| 724 | shvar _ESCAPER=nested {
|
| 725 | echo nested _ESCAPER=$_ESCAPER
|
| 726 | echo nested _DIALECT=$_DIALECT
|
| 727 | }
|
| 728 | }
|
| 729 |
|
| 730 | echo _ESCAPER=$_ESCAPER
|
| 731 | echo _DIALECT=$_DIALECT
|
| 732 |
|
| 733 | ## STDOUT:
|
| 734 | _ESCAPER=
|
| 735 | _DIALECT=
|
| 736 | block _ESCAPER=html
|
| 737 | block _DIALECT=ninja
|
| 738 | _ESCAPER=
|
| 739 | _DIALECT=
|
| 740 | ___
|
| 741 | _ESCAPER=foo
|
| 742 | _DIALECT=bar
|
| 743 | block _ESCAPER=html
|
| 744 | block _DIALECT=ninja
|
| 745 | nested _ESCAPER=nested
|
| 746 | nested _DIALECT=ninja
|
| 747 | _ESCAPER=foo
|
| 748 | _DIALECT=bar
|
| 749 | ## END
|
| 750 |
|
| 751 | #### shvar local
|
| 752 | shopt --set ysh:upgrade # blocks
|
| 753 | shopt --unset simple_word_eval # test word splitting
|
| 754 |
|
| 755 | proc foo {
|
| 756 | shvar IFS=x MYTEMP=foo {
|
| 757 | echo IFS="$IFS"
|
| 758 | argv.py $s
|
| 759 | echo MYTEMP=${MYTEMP:-undef}
|
| 760 | }
|
| 761 | }
|
| 762 | var s = 'a b c'
|
| 763 | argv.py $s
|
| 764 | foo
|
| 765 | argv.py $s
|
| 766 | echo MYTEMP=${MYTEMP:-undef}
|
| 767 | ## STDOUT:
|
| 768 | ['a', 'b', 'c']
|
| 769 | IFS=x
|
| 770 | ['a b c']
|
| 771 | MYTEMP=foo
|
| 772 | ['a', 'b', 'c']
|
| 773 | MYTEMP=undef
|
| 774 | ## END
|
| 775 |
|
| 776 | #### shvar IFS
|
| 777 | shopt --set ysh:upgrade
|
| 778 |
|
| 779 | proc myproc() {
|
| 780 | echo "$IFS" | od -A n -t x1
|
| 781 |
|
| 782 | local mylocal=x
|
| 783 | shvar IFS=w {
|
| 784 | echo inside IFS="$IFS"
|
| 785 | echo mylocal="$mylocal" # I do NOT want a new scope!
|
| 786 | }
|
| 787 | echo "$IFS" | od -A n -t x1
|
| 788 | }
|
| 789 |
|
| 790 | myproc
|
| 791 | ## STDOUT:
|
| 792 | 20 09 0a 0a
|
| 793 | inside IFS=w
|
| 794 | mylocal=x
|
| 795 | 20 09 0a 0a
|
| 796 | ## END
|
| 797 |
|
| 798 | #### Compare shell func vs. proc, $IFS vs. shvarGet('IFS')
|
| 799 |
|
| 800 | shopt --set parse_proc
|
| 801 |
|
| 802 | s='xzx zxz'
|
| 803 |
|
| 804 | shellfunc() { # dynamic scope everywhere
|
| 805 | echo shellfunc
|
| 806 | echo IFS="$IFS"
|
| 807 | echo shvarGet IFS=$[shvarGet('IFS')]
|
| 808 | argv.py $s
|
| 809 | }
|
| 810 |
|
| 811 | proc myproc { # no dynamic scope
|
| 812 |
|
| 813 | # Subtle behavior: we see 'x' rather than "temp frame" 'z' - I think because
|
| 814 | # there is a CHAIN of __E__ enclosed scopes, up to the global frame.
|
| 815 | #
|
| 816 | # That frame comes FIRST. That seems OK, but it changed when procs became closures.
|
| 817 | proc p2 {
|
| 818 | echo "myproc -> p2"
|
| 819 | echo IFS="$IFS"
|
| 820 | echo shvarGet IFS=$[shvarGet('IFS')] # dynamic scope opt-in
|
| 821 | argv.py $s # dynamic scope in osh/split.py
|
| 822 | }
|
| 823 |
|
| 824 | p2
|
| 825 | }
|
| 826 |
|
| 827 | IFS=x
|
| 828 |
|
| 829 | IFS=z shellfunc
|
| 830 | echo
|
| 831 |
|
| 832 | # this makes a temp frame, but the proc can't see it?
|
| 833 | IFS=z myproc
|
| 834 | echo
|
| 835 |
|
| 836 | # null
|
| 837 | echo $[shvarGet('nonexistent')]
|
| 838 |
|
| 839 | ## STDOUT:
|
| 840 | shellfunc
|
| 841 | IFS=z
|
| 842 | shvarGet IFS=z
|
| 843 | ['x', 'x ', 'x']
|
| 844 |
|
| 845 | myproc -> p2
|
| 846 | IFS=x
|
| 847 | shvarGet IFS=x
|
| 848 | ['', 'z', ' z', 'z']
|
| 849 |
|
| 850 | null
|
| 851 | ## END
|
| 852 |
|
| 853 | #### func and proc are like var, with respect to closures
|
| 854 | shopt --set ysh:all
|
| 855 |
|
| 856 | proc test-var {
|
| 857 | var x = 'outer'
|
| 858 | proc inner {
|
| 859 | var x = 'inner'
|
| 860 | # note: static check is broken now
|
| 861 | #setvar x = 'inner'
|
| 862 | echo "inner $x"
|
| 863 | }
|
| 864 | inner
|
| 865 | echo "outer $x"
|
| 866 | }
|
| 867 |
|
| 868 | # Note: state.YshDecl flag somehow doesn't make a difference here?
|
| 869 | proc test-func {
|
| 870 | func x() { return ('outer') }
|
| 871 | proc inner2 {
|
| 872 | func x() { return ('inner') }
|
| 873 | echo "inner $[x()]"
|
| 874 | }
|
| 875 | inner2
|
| 876 | echo "outer $[x()]"
|
| 877 | }
|
| 878 |
|
| 879 | proc test-proc {
|
| 880 | proc x { echo 'outer' }
|
| 881 | proc inner3 {
|
| 882 | proc x { echo 'inner' }
|
| 883 | x
|
| 884 | }
|
| 885 | inner3
|
| 886 | x
|
| 887 | }
|
| 888 |
|
| 889 |
|
| 890 | test-var
|
| 891 | echo
|
| 892 |
|
| 893 | test-func
|
| 894 | echo
|
| 895 |
|
| 896 | test-proc
|
| 897 |
|
| 898 | ## STDOUT:
|
| 899 | inner inner
|
| 900 | outer outer
|
| 901 |
|
| 902 | inner inner
|
| 903 | outer outer
|
| 904 |
|
| 905 | inner
|
| 906 | outer
|
| 907 | ## END
|