| 1 | ## compare_shells: bash mksh zsh
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| 2 | ## oils_failures_allowed: 0
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| 3 |
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| 4 | # Test arithmetic expressions in all their different contexts.
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| 5 |
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| 6 | # $(( 1 + 2 ))
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| 7 | # (( a=1+2 ))
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| 8 | # ${a[ 1 + 2 ]}
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| 9 | # ${a : 1+2 : 1+2}
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| 10 | # a[1 + 2]=foo
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| 11 |
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| 12 | #### Multiple right brackets inside expression
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| 13 |
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| 14 | a=(1 2 3)
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| 15 | echo ${a[a[0]]} ${a[a[a[0]]]}
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| 16 |
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| 17 | ## STDOUT:
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| 18 | 2 3
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| 19 | ## END
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| 20 |
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| 21 | ## N-I zsh status: 0
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| 22 | ## N-I zsh STDOUT:
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| 23 |
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| 24 | ## END
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| 25 |
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| 26 | #### Slicing of string with constants
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| 27 | s='abcd'
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| 28 | echo ${s:0} ${s:0:4} ${s:1:1}
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| 29 | ## stdout: abcd abcd b
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| 30 |
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| 31 | #### Slicing of string with variables
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| 32 | s='abcd'
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| 33 | zero=0
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| 34 | one=1
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| 35 | echo ${s:$zero} ${s:$zero:4} ${s:$one:$one}
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| 36 | ## stdout: abcd abcd b
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| 37 |
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| 38 | #### Array index on LHS of assignment
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| 39 | a=(1 2 3)
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| 40 | zero=0
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| 41 | a[zero+5-4]=X
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| 42 | echo ${a[@]}
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| 43 | ## stdout: 1 X 3
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| 44 | ## OK zsh stdout: X 2 3
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| 45 |
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| 46 | #### Array index on LHS with indices
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| 47 | a=(1 2 3)
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| 48 | a[a[1]]=X
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| 49 | echo ${a[@]}
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| 50 | ## stdout: 1 2 X
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| 51 | ## OK zsh stdout: X 2 3
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| 52 |
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| 53 | #### Slicing of string with expressions
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| 54 | # mksh accepts ${s:0} and ${s:$zero} but not ${s:zero}
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| 55 | # zsh says unrecognized modifier 'z'
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| 56 | s='abcd'
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| 57 | zero=0
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| 58 | echo ${s:zero} ${s:zero+0} ${s:zero+1:zero+1}
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| 59 | ## stdout: abcd abcd b
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| 60 | ## BUG mksh stdout-json: ""
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| 61 | ## BUG mksh status: 1
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| 62 | ## BUG zsh stdout-json: ""
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| 63 | ## BUG zsh status: 1
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| 64 |
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| 65 | #### Ambiguous colon in slice
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| 66 | s='abcd'
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| 67 | echo $(( 0 < 1 ? 2 : 0 )) # evaluates to 2
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| 68 | echo ${s: 0 < 1 ? 2 : 0 : 1} # 2:1 -- TRICKY THREE COLONS
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| 69 | ## STDOUT:
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| 70 | 2
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| 71 | c
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| 72 | ## END
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| 73 | ## BUG mksh/zsh STDOUT:
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| 74 | 2
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| 75 | ## END
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| 76 | ## BUG mksh/zsh status: 1
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| 77 |
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| 78 | #### Triple parens should be disambiguated
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| 79 | # The first paren is part of the math, parens 2 and 3 are a single token ending
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| 80 | # arith sub.
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| 81 | ((a=1 + (2*3)))
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| 82 | echo $a $((1 + (2*3)))
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| 83 | ## STDOUT:
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| 84 | 7 7
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| 85 | ## END
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| 86 |
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| 87 | #### Quadruple parens should be disambiguated
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| 88 | ((a=1 + (2 * (3+4))))
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| 89 | echo $a $((1 + (2 * (3+4))))
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| 90 | ## STDOUT:
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| 91 | 15 15
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| 92 | ## END
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| 93 |
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| 94 | #### $[ is a synonym for $((
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| 95 | echo $[1+2] $[3 * 4]
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| 96 |
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| 97 | ## STDOUT:
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| 98 | 3 12
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| 99 | ## END
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| 100 | ## N-I mksh STDOUT:
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| 101 | $[1+2] $[3 * 4]
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| 102 | ## END
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| 103 |
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| 104 | #### $[$var is a synonym for $(($var (#2426)
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| 105 | var=1
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| 106 | echo $[$var+2]
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| 107 |
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| 108 | ## STDOUT:
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| 109 | 3
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| 110 | ## END
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| 111 | ## N-I mksh STDOUT:
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| 112 | $[1+2]
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| 113 | ## END
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| 114 |
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| 115 | #### $[$undefined] is a synonym for $(($undefined (#2566)
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| 116 | a[0]=$[1+3]
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| 117 | b[0]=$[b[0]]
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| 118 | c[0]=$[b[0]]
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| 119 | echo ${c[0]}
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| 120 |
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| 121 | ## STDOUT:
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| 122 | 0
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| 123 | ## END
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| 124 |
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| 125 | ## BUG zsh status: 1
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| 126 | ## BUG zsh STDOUT:
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| 127 | ## END
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| 128 |
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| 129 | ## N-I mksh STDOUT:
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| 130 | $[b[0]]
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| 131 | ## END
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| 132 |
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| 133 | #### Empty expression (( )) $(( ))
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| 134 |
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| 135 | (( ))
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| 136 | echo status=$?
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| 137 |
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| 138 | echo $(( ))
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| 139 |
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| 140 | #echo $[]
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| 141 |
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| 142 | ## STDOUT:
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| 143 | status=1
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| 144 | 0
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| 145 | ## END
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| 146 |
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| 147 | #### Empty expression for (( ))
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| 148 |
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| 149 | for (( ; ; )); do
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| 150 | echo one
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| 151 | break
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| 152 | done
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| 153 |
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| 154 | ## STDOUT:
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| 155 | one
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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 | ## N-I mksh STDOUT:
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| 160 | ## END
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| 161 |
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| 162 | #### Empty expression in ${a[@]: : }
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| 163 |
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| 164 | a=(a b c d e f)
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| 165 |
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| 166 | # space required here -- see spec/var-op-slice
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| 167 | echo slice ${a[@]: }
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| 168 | echo status=$?
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| 169 | echo
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| 170 |
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| 171 | echo slice ${a[@]: : }
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| 172 | echo status=$?
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| 173 | echo
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| 174 |
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| 175 | # zsh doesn't accept this
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| 176 | echo slice ${a[@]:: }
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| 177 | echo status=$?
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| 178 |
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| 179 | ## STDOUT:
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| 180 | slice a b c d e f
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| 181 | status=0
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| 182 |
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| 183 | slice
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| 184 | status=0
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| 185 |
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| 186 | slice
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| 187 | status=0
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| 188 | ## END
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| 189 |
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| 190 | ## BUG zsh status: 1
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| 191 | ## BUG zsh STDOUT:
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| 192 | slice a b c d e f
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| 193 | status=0
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| 194 |
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| 195 | slice
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| 196 | status=0
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| 197 |
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| 198 | ## END
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| 199 |
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| 200 | ## BUG mksh status: 1
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| 201 | ## BUG mksh STDOUT:
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| 202 | ## END
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| 203 |
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| 204 |
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| 205 | #### Empty expression a[]
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| 206 |
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| 207 | a=(1 2 3)
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| 208 |
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| 209 | a[]=42
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| 210 | echo status=$?
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| 211 | echo ${a[@]}
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| 212 |
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| 213 | echo ${a[]}
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| 214 | echo status=$?
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| 215 |
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| 216 | ## status: 2
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| 217 | ## STDOUT:
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| 218 | ## END
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| 219 |
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| 220 | ## OK zsh status: 1
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| 221 |
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| 222 | # runtime failures
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| 223 |
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| 224 | ## OK bash status: 0
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| 225 | ## OK bash STDOUT:
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| 226 | status=1
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| 227 | 1 2 3
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| 228 | status=1
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| 229 | ## END
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| 230 |
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| 231 | ## BUG mksh status: 0
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| 232 | ## BUG mksh STDOUT:
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| 233 | status=0
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| 234 | 42 2 3
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| 235 | 42
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| 236 | status=0
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| 237 | ## END
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| 238 |
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| 239 |
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| 240 | # Others
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| 241 | # [ 1+2 -eq 3 ]
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| 242 | # [[ 1+2 -eq 3 ]]
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| 243 | # unset a[]
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| 244 | # printf -v a[]
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| 245 |
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