| 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=$t
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| 31 | ## STDOUT:
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| 32 | s=foo
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| 33 | t=foo
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| 34 | t=foofoo
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| 35 | ## END
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| 36 |
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| 37 | #### Append to array to undefined variable
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| 38 |
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| 39 | # I wonder if Oil should have accumulators:
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| 40 | # auto y += %(c d) or something
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| 41 |
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| 42 | y+=(c d)
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| 43 | argv.py "${y[@]}"
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| 44 | ## STDOUT:
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| 45 | ['c', 'd']
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| 46 | ## END
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| 47 |
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| 48 | #### error: s+=(my array)
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| 49 | s='abc'
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| 50 | s+=(d e f)
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| 51 | argv.py "${s[@]}"
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| 52 | ## status: 0
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| 53 | ## STDOUT:
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| 54 | ['abc', 'd', 'e', 'f']
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| 55 | ## END
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| 56 |
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| 57 | #### error: myarray+=s
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| 58 |
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| 59 | # They treat this as implicit index 0. We disallow this on the LHS, so we will
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| 60 | # also disallow it on the RHS.
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| 61 | a=(x y )
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| 62 | a+=z
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| 63 | argv.py "${a[@]}"
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| 64 | ## status: 1
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| 65 | ## stdout-json: ""
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| 66 | ## OK bash/mksh status: 0
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| 67 | ## OK bash/mksh stdout: ['xz', 'y']
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| 68 | ## OK zsh status: 0
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| 69 | ## OK zsh stdout: ['x', 'y', 'z']
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| 70 |
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| 71 | #### typeset s+=(my array)
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| 72 | typeset s='abc'
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| 73 | echo $s
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| 74 |
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| 75 | typeset s+=(d e f)
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| 76 | echo status=$?
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| 77 | argv.py "${s[@]}"
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| 78 |
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| 79 | ## status: 0
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| 80 | ## STDOUT:
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| 81 | abc
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| 82 | status=0
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| 83 | ['abc', 'd', 'e', 'f']
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| 84 | ## END
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| 85 | ## N-I mksh/zsh status: 1
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| 86 | ## N-I mksh/zsh stdout: abc
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| 87 | ## N-I mksh stderr: mksh: <stdin>[4]: syntax error: '(' unexpected
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| 88 | ## N-I zsh stderr: typeset: not valid in this context: s+
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| 89 |
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| 90 | #### error: typeset myarray+=s
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| 91 | typeset a=(x y)
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| 92 | argv.py "${a[@]}"
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| 93 | typeset a+=s
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| 94 | argv.py "${a[@]}"
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| 95 |
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| 96 | ## status: 1
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| 97 | ## STDOUT:
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| 98 | ['x', 'y']
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| 99 | ## END
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| 100 | ## BUG bash status: 0
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| 101 | ## BUG bash STDOUT:
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| 102 | ['x', 'y']
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| 103 | ['xs', 'y']
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| 104 | ## END
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| 105 | ## N-I mksh STDOUT:
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| 106 | ## END
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| 107 |
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| 108 | #### error: append used like env prefix
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| 109 | # This should be an error in other shells but it's not.
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| 110 | A=a
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| 111 | A+=a printenv.py A
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| 112 | ## status: 2
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| 113 | ## BUG bash/zsh status: 0
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| 114 | ## BUG bash/zsh stdout: aa
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| 115 | ## BUG mksh status: 0
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| 116 | ## BUG mksh stdout: a
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| 117 |
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| 118 | #### myarray[1]+=s - Append to element
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| 119 | # They treat this as implicit index 0. We disallow this on the LHS, so we will
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| 120 | # also disallow it on the RHS.
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| 121 | a=(x y )
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| 122 | a[1]+=z
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| 123 | argv.py "${a[@]}"
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| 124 | ## status: 0
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| 125 | ## stdout: ['x', 'yz']
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| 126 | ## BUG zsh stdout: ['xz', 'y']
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| 127 |
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| 128 | #### myarray[-1]+=s - Append to last element
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| 129 | # Works in bash, but not mksh. It seems like bash is doing the right thing.
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| 130 | # a[-1] is allowed on the LHS. mksh doesn't have negative indexing?
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| 131 | a=(1 '2 3')
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| 132 | a[-1]+=' 4'
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| 133 | argv.py "${a[@]}"
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| 134 | ## stdout: ['1', '2 3 4']
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| 135 | ## BUG mksh stdout: ['1', '2 3', ' 4']
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| 136 |
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| 137 | #### Try to append list to element
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| 138 | # bash - runtime error: cannot assign list to array number
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| 139 | # mksh - a[-1]+: is not an identifier
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| 140 | # osh - parse error -- could be better!
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| 141 | a=(1 '2 3')
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| 142 | a[-1]+=(4 5)
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| 143 | argv.py "${a[@]}"
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| 144 |
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| 145 | ## stdout-json: ""
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| 146 | ## status: 2
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| 147 |
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| 148 | ## OK bash status: 0
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| 149 | ## OK bash STDOUT:
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| 150 | ['1', '2 3']
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| 151 | ## END
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| 152 |
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| 153 | ## OK zsh status: 0
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| 154 | ## OK zsh STDOUT:
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| 155 | ['1', '2 3', '4', '5']
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| 156 | ## END
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| 157 |
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| 158 | ## N-I mksh status: 1
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| 159 |
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| 160 | #### Strings have value semantics, not reference semantics
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| 161 | s1='abc'
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| 162 | s2=$s1
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| 163 | s1+='d'
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| 164 | echo $s1 $s2
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| 165 | ## stdout: abcd abc
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| 166 |
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| 167 | #### typeset s+=
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| 168 |
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| 169 | typeset s+=foo
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| 170 | echo s=$s
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| 171 |
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| 172 | # bash and mksh agree that this does NOT respect set -u.
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| 173 | # I think that's a mistake, but += is a legacy construct, so let's copy it.
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| 174 |
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| 175 | set -u
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| 176 |
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| 177 | typeset t+=foo
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| 178 | echo t=$t
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| 179 | typeset t+=foo
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| 180 | echo t=$t
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| 181 | ## STDOUT:
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| 182 | s=foo
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| 183 | t=foo
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| 184 | t=foofoo
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| 185 | ## END
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| 186 | ## N-I zsh status: 1
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| 187 | ## N-I zsh stdout-json: ""
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| 188 |
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| 189 | #### typeset s${dyn}+=
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| 190 |
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| 191 | dyn=x
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| 192 |
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| 193 | typeset s${dyn}+=foo
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| 194 | echo sx=$sx
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| 195 |
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| 196 | # bash and mksh agree that this does NOT respect set -u.
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| 197 | # I think that's a mistake, but += is a legacy construct, so let's copy it.
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| 198 |
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| 199 | set -u
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| 200 |
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| 201 | typeset t${dyn}+=foo
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| 202 | echo tx=$tx
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| 203 | typeset t${dyn}+=foo
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| 204 | echo tx=$tx
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| 205 | ## STDOUT:
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| 206 | sx=foo
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| 207 | tx=foo
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| 208 | tx=foofoo
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| 209 | ## END
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| 210 | ## N-I zsh status: 1
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| 211 | ## N-I zsh stdout-json: ""
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| 212 |
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| 213 | #### export readonly +=
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| 214 |
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| 215 | export e+=foo
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| 216 | echo e=$e
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| 217 |
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| 218 | readonly r+=bar
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| 219 | echo r=$r
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| 220 |
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| 221 | set -u
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| 222 |
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| 223 | export e+=foo
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| 224 | echo e=$e
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| 225 |
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| 226 | #readonly r+=foo
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| 227 | #echo r=$e
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| 228 |
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| 229 | ## STDOUT:
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| 230 | e=foo
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| 231 | r=bar
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| 232 | e=foofoo
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| 233 | ## END
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| 234 | ## N-I zsh status: 1
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| 235 | ## N-I zsh stdout-json: ""
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| 236 |
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| 237 | #### local +=
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| 238 |
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| 239 | f() {
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| 240 | local s+=foo
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| 241 | echo s=$s
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| 242 |
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| 243 | set -u
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| 244 | local s+=foo
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| 245 | echo s=$s
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| 246 | }
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| 247 |
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| 248 | f
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| 249 | ## STDOUT:
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| 250 | s=foo
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| 251 | s=foofoo
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| 252 | ## END
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| 253 | ## N-I zsh status: 1
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| 254 | ## N-I zsh stdout-json: ""
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| 255 |
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| 256 | #### assign builtin appending array: declare d+=(d e)
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| 257 |
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| 258 | declare d+=(d e)
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| 259 | echo "${d[@]}"
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| 260 | declare d+=(c l)
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| 261 | echo "${d[@]}"
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| 262 |
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| 263 | readonly r+=(r e)
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| 264 | echo "${r[@]}"
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| 265 | # can't do this again
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| 266 |
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| 267 | f() {
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| 268 | local l+=(l o)
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| 269 | echo "${l[@]}"
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| 270 |
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| 271 | local l+=(c a)
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| 272 | echo "${l[@]}"
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| 273 | }
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| 274 |
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| 275 | f
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| 276 |
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| 277 | ## STDOUT:
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| 278 | d e
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| 279 | d e c l
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| 280 | r e
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| 281 | l o
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| 282 | l o c a
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| 283 | ## END
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| 284 | ## N-I mksh status: 1
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| 285 | ## N-I mksh stdout-json: ""
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| 286 | ## N-I zsh status: 1
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| 287 | ## N-I zsh stdout-json: ""
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| 288 |
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| 289 | #### export+=array disallowed (strict_array)
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| 290 | shopt -s strict_array
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| 291 |
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| 292 | export e+=(e x)
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| 293 | echo "${e[@]}"
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| 294 |
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| 295 | ## status: 1
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| 296 | ## STDOUT:
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| 297 | ## END
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| 298 | ## N-I bash status: 0
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| 299 | ## N-I bash STDOUT:
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| 300 | e x
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| 301 | ## END
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| 302 |
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| 303 |
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| 304 | #### Type mismatching of lhs+=rhs should not cause a crash
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| 305 | case $SH in mksh|zsh) exit ;; esac
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| 306 | s=
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| 307 | a=()
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| 308 | declare -A d=([lemon]=yellow)
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| 309 |
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| 310 | s+=(1)
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| 311 | s+=([melon]=green)
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| 312 |
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| 313 | a+=lime
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| 314 | a+=([1]=banana)
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| 315 |
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| 316 | d+=orange
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| 317 | d+=(0)
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| 318 |
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| 319 | true
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| 320 |
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| 321 | ## STDOUT:
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| 322 | ## END
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| 323 |
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| 324 | ## OK osh status: 1
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| 325 |
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| 326 | ## N-I mksh/zsh STDOUT:
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| 327 | ## END
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