| 1 | # spec/append.test.sh: Test +=
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| 2 |
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| 3 | ## compare_shells: bash mksh zsh
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| 4 |
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| 5 | #### Append string to string
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| 6 | s='abc'
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| 7 | s+=d
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| 8 | echo $s
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| 9 | ## stdout: abcd
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| 10 |
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| 11 | #### Append array to array
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| 12 | a=(x y )
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| 13 | a+=(t 'u v')
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| 14 | argv.py "${a[@]}"
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| 15 | ## stdout: ['x', 'y', 't', 'u v']
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| 16 |
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| 17 | #### Append string to undefined variable
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| 18 |
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| 19 | s+=foo
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| 20 | echo s=$s
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| 21 |
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| 22 | # bash and mksh agree that this does NOT respect set -u.
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| 23 | # I think that's a mistake, but += is a legacy construct, so let's copy it.
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| 24 |
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| 25 | set -u
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| 26 |
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| 27 | t+=foo
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| 28 | echo t=$t
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| 29 | t+=foo
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| 30 | echo t=$t
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| 31 | ## STDOUT:
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| 32 | s=foo
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| 33 | t=foo
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| 34 | t=foofoo
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| 35 | ## END
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| 36 |
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| 37 | #### Append to array to undefined variable
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| 38 |
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| 39 | y+=(c d)
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| 40 | argv.py "${y[@]}"
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| 41 | ## STDOUT:
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| 42 | ['c', 'd']
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| 43 | ## END
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| 44 |
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| 45 | #### error: s+=(my array)
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| 46 | s='abc'
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| 47 | s+=(d e f)
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| 48 | argv.py "${s[@]}"
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| 49 | ## status: 0
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| 50 | ## STDOUT:
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| 51 | ['abc', 'd', 'e', 'f']
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| 52 | ## END
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| 53 |
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| 54 | #### error: myarray+=s
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| 55 |
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| 56 | # They treat this as implicit index 0. We disallow this on the LHS, so we will
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| 57 | # also disallow it on the RHS.
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| 58 | a=(x y )
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| 59 | a+=z
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| 60 | argv.py "${a[@]}"
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| 61 | ## status: 1
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| 62 | ## stdout-json: ""
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| 63 | ## OK bash/mksh status: 0
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| 64 | ## OK bash/mksh stdout: ['xz', 'y']
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| 65 | ## OK zsh status: 0
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| 66 | ## OK zsh stdout: ['x', 'y', 'z']
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| 67 |
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| 68 | #### typeset s+=(my array)
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| 69 | typeset s='abc'
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| 70 | echo $s
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| 71 |
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| 72 | typeset s+=(d e f)
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| 73 | echo status=$?
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| 74 | argv.py "${s[@]}"
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| 75 |
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| 76 | ## status: 0
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| 77 | ## STDOUT:
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| 78 | abc
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| 79 | status=0
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| 80 | ['abc', 'd', 'e', 'f']
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| 81 | ## END
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| 82 | ## N-I mksh/zsh status: 1
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| 83 | ## N-I mksh/zsh stdout: abc
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| 84 | ## N-I mksh stderr: mksh: <stdin>[4]: syntax error: '(' unexpected
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| 85 | ## N-I zsh stderr: typeset: not valid in this context: s+
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| 86 |
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| 87 | #### error: typeset myarray+=s
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| 88 | typeset a=(x y)
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| 89 | argv.py "${a[@]}"
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| 90 | typeset a+=s
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| 91 | argv.py "${a[@]}"
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| 92 |
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| 93 | ## status: 1
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| 94 | ## STDOUT:
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| 95 | ['x', 'y']
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| 96 | ## END
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| 97 | ## BUG bash status: 0
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| 98 | ## BUG bash STDOUT:
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| 99 | ['x', 'y']
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| 100 | ['xs', 'y']
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| 101 | ## END
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| 102 | ## N-I mksh STDOUT:
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| 103 | ## END
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| 104 |
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| 105 | #### error: append used like env prefix
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| 106 | # This should be an error in other shells but it's not.
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| 107 | A=a
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| 108 | A+=a printenv.py A
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| 109 | ## status: 2
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| 110 | ## BUG bash/zsh status: 0
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| 111 | ## BUG bash/zsh stdout: aa
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| 112 | ## BUG mksh status: 0
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| 113 | ## BUG mksh stdout: a
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| 114 |
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| 115 | #### myarray[1]+=s - Append to element
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| 116 | # They treat this as implicit index 0. We disallow this on the LHS, so we will
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| 117 | # also disallow it on the RHS.
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| 118 | a=(x y )
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| 119 | a[1]+=z
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| 120 | argv.py "${a[@]}"
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| 121 | ## status: 0
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| 122 | ## stdout: ['x', 'yz']
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| 123 | ## BUG zsh stdout: ['xz', 'y']
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| 124 |
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| 125 | #### myarray[-1]+=s - Append to last element
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| 126 | # Works in bash, but not mksh. It seems like bash is doing the right thing.
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| 127 | # a[-1] is allowed on the LHS. mksh doesn't have negative indexing?
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| 128 | a=(1 '2 3')
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| 129 | a[-1]+=' 4'
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| 130 | argv.py "${a[@]}"
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| 131 | ## stdout: ['1', '2 3 4']
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| 132 | ## BUG mksh stdout: ['1', '2 3', ' 4']
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| 133 |
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| 134 | #### Try to append list to element
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| 135 | # bash - runtime error: cannot assign list to array number
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| 136 | # mksh - a[-1]+: is not an identifier
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| 137 | # osh - parse error -- could be better!
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| 138 | a=(1 '2 3')
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| 139 | a[-1]+=(4 5)
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| 140 | argv.py "${a[@]}"
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| 141 |
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| 142 | ## stdout-json: ""
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| 143 | ## status: 2
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| 144 |
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| 145 | ## OK bash status: 0
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| 146 | ## OK bash STDOUT:
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| 147 | ['1', '2 3']
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| 148 | ## END
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| 149 |
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| 150 | ## OK zsh status: 0
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| 151 | ## OK zsh STDOUT:
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| 152 | ['1', '2 3', '4', '5']
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| 153 | ## END
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| 154 |
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| 155 | ## N-I mksh status: 1
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| 156 |
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| 157 | #### Strings have value semantics, not reference semantics
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| 158 | s1='abc'
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| 159 | s2=$s1
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| 160 | s1+='d'
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| 161 | echo $s1 $s2
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| 162 | ## stdout: abcd abc
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| 163 |
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| 164 | #### typeset s+=
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| 165 |
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| 166 | typeset s+=foo
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| 167 | echo s=$s
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| 168 |
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| 169 | # bash and mksh agree that this does NOT respect set -u.
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| 170 | # I think that's a mistake, but += is a legacy construct, so let's copy it.
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| 171 |
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| 172 | set -u
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| 173 |
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| 174 | typeset t+=foo
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| 175 | echo t=$t
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| 176 | typeset t+=foo
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| 177 | echo t=$t
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| 178 | ## STDOUT:
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| 179 | s=foo
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| 180 | t=foo
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| 181 | t=foofoo
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| 182 | ## END
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| 183 | ## N-I zsh status: 1
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| 184 | ## N-I zsh stdout-json: ""
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| 185 |
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| 186 | #### typeset s${dyn}+=
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| 187 |
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| 188 | dyn=x
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| 189 |
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| 190 | typeset s${dyn}+=foo
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| 191 | echo sx=$sx
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| 192 |
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| 193 | # bash and mksh agree that this does NOT respect set -u.
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| 194 | # I think that's a mistake, but += is a legacy construct, so let's copy it.
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| 195 |
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| 196 | set -u
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| 197 |
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| 198 | typeset t${dyn}+=foo
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| 199 | echo tx=$tx
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| 200 | typeset t${dyn}+=foo
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| 201 | echo tx=$tx
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| 202 | ## STDOUT:
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| 203 | sx=foo
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| 204 | tx=foo
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| 205 | tx=foofoo
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| 206 | ## END
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| 207 | ## N-I zsh status: 1
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| 208 | ## N-I zsh stdout-json: ""
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| 209 |
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| 210 | #### export readonly +=
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| 211 |
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| 212 | export e+=foo
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| 213 | echo e=$e
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| 214 |
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| 215 | readonly r+=bar
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| 216 | echo r=$r
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| 217 |
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| 218 | set -u
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| 219 |
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| 220 | export e+=foo
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| 221 | echo e=$e
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| 222 |
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| 223 | #readonly r+=foo
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| 224 | #echo r=$e
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| 225 |
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| 226 | ## STDOUT:
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| 227 | e=foo
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| 228 | r=bar
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| 229 | e=foofoo
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| 230 | ## END
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| 231 | ## N-I zsh status: 1
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| 232 | ## N-I zsh stdout-json: ""
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| 233 |
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| 234 | #### local +=
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| 235 |
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| 236 | f() {
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| 237 | local s+=foo
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| 238 | echo s=$s
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| 239 |
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| 240 | set -u
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| 241 | local s+=foo
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| 242 | echo s=$s
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| 243 | }
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| 244 |
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| 245 | f
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| 246 | ## STDOUT:
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| 247 | s=foo
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| 248 | s=foofoo
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| 249 | ## END
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| 250 | ## N-I zsh status: 1
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| 251 | ## N-I zsh stdout-json: ""
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| 252 |
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| 253 | #### assign builtin appending array: declare d+=(d e)
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| 254 |
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| 255 | declare d+=(d e)
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| 256 | echo "${d[@]}"
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| 257 | declare d+=(c l)
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| 258 | echo "${d[@]}"
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| 259 |
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| 260 | readonly r+=(r e)
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| 261 | echo "${r[@]}"
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| 262 | # can't do this again
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| 263 |
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| 264 | f() {
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| 265 | local l+=(l o)
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| 266 | echo "${l[@]}"
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| 267 |
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| 268 | local l+=(c a)
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| 269 | echo "${l[@]}"
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| 270 | }
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| 271 |
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| 272 | f
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| 273 |
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| 274 | ## STDOUT:
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| 275 | d e
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| 276 | d e c l
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| 277 | r e
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| 278 | l o
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| 279 | l o c a
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| 280 | ## END
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| 281 | ## N-I mksh status: 1
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| 282 | ## N-I mksh stdout-json: ""
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| 283 | ## N-I zsh status: 1
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| 284 | ## N-I zsh stdout-json: ""
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| 285 |
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| 286 | #### export+=array disallowed (strict_array)
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| 287 | shopt -s strict_array
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| 288 |
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| 289 | export e+=(e x)
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| 290 | echo "${e[@]}"
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| 291 |
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| 292 | ## status: 1
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| 293 | ## STDOUT:
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| 294 | ## END
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| 295 | ## N-I bash status: 0
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| 296 | ## N-I bash STDOUT:
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| 297 | e x
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| 298 | ## END
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| 299 |
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| 300 |
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| 301 | #### Type mismatching of lhs+=rhs should not cause a crash
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| 302 | case $SH in mksh|zsh) exit ;; esac
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| 303 | s=
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| 304 | a=()
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| 305 | declare -A d=([lemon]=yellow)
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| 306 |
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| 307 | s+=(1)
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| 308 | s+=([melon]=green)
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| 309 |
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| 310 | a+=lime
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| 311 | a+=([1]=banana)
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| 312 |
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| 313 | d+=orange
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| 314 | d+=(0)
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| 315 |
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| 316 | true
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| 317 |
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| 318 | ## STDOUT:
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| 319 | ## END
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| 320 |
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| 321 | ## OK osh status: 1
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| 322 |
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| 323 | ## N-I mksh/zsh STDOUT:
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| 324 | ## END
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