| 1 | ## compare_shells: bash-4.4 zsh
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| 2 |
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| 3 | # Constructs borrowed from ksh. Hm I didn't realize zsh also implements these!
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| 4 | # mksh implements most too.
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| 5 |
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| 6 | #### C-style for loop
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| 7 | n=10
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| 8 | for ((a=1; a <= n ; a++)) # Double parentheses, and naked 'n'
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| 9 | do
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| 10 | if test $a = 3; then
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| 11 | continue
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| 12 | fi
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| 13 | if test $a = 6; then
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| 14 | break
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| 15 | fi
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| 16 | echo $a
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| 17 | done
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| 18 | ## status: 0
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| 19 | ## STDOUT:
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| 20 | 1
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| 21 | 2
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| 22 | 4
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| 23 | 5
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| 24 | ## END
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| 25 |
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| 26 | #### For loop with and without semicolon
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| 27 | for ((a=1; a <= 3; a++)); do
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| 28 | echo $a
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| 29 | done
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| 30 | for ((a=1; a <= 3; a++)) do
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| 31 | echo $a
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| 32 | done
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| 33 | ## status: 0
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| 34 | ## STDOUT:
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| 35 | 1
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| 36 | 2
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| 37 | 3
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| 38 | 1
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| 39 | 2
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| 40 | 3
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| 41 | ## END
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| 42 |
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| 43 | #### Accepts { } syntax too
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| 44 | for ((a=1; a <= 3; a++)) {
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| 45 | echo $a
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| 46 | }
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| 47 | ## STDOUT:
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| 48 | 1
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| 49 | 2
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| 50 | 3
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| 51 | ## END
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| 52 |
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| 53 | #### Empty init
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| 54 | i=1
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| 55 | for (( ;i < 4; i++ )); do
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| 56 | echo $i
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| 57 | done
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| 58 | ## status: 0
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| 59 | ## STDOUT:
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| 60 | 1
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| 61 | 2
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| 62 | 3
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| 63 | ## END
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| 64 |
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| 65 | #### Empty init and cond
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| 66 | i=1
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| 67 | for (( ; ; i++ )); do
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| 68 | if test $i = 4; then
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| 69 | break
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| 70 | fi
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| 71 | echo $i
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| 72 | done
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| 73 | ## status: 0
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| 74 | ## STDOUT:
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| 75 | 1
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| 76 | 2
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| 77 | 3
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| 78 | ## END
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| 79 |
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| 80 | #### Infinite loop with ((;;))
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| 81 | a=1
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| 82 | for (( ; ; )); do
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| 83 | if test $a = 4; then
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| 84 | break
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| 85 | fi
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| 86 | echo $((a++))
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| 87 | done
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| 88 | ## status: 0
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| 89 | ## STDOUT:
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| 90 | 1
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| 91 | 2
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| 92 | 3
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| 93 | ## END
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| 94 |
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| 95 |
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| 96 | #### Arith lexer mode
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| 97 |
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| 98 | # bash is lenient; zsh disagrees
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| 99 |
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| 100 | for ((i = '3'; i < '5'; ++i)); do echo $i; done
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| 101 | for ((i = "3"; i < "5"; ++i)); do echo $i; done
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| 102 | for ((i = $'3'; i < $'5'; ++i)); do echo $i; done
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| 103 | for ((i = $"3"; i < $"5"; ++i)); do echo $i; done
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| 104 |
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| 105 | ## STDOUT:
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| 106 | 3
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| 107 | 4
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| 108 | 3
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| 109 | 4
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| 110 | 3
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| 111 | 4
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| 112 | 3
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| 113 | 4
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| 114 | ## END
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| 115 | ## OK zsh status: 1
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| 116 | ## OK zsh STDOUT:
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| 117 | ## END
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| 118 |
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| 119 |
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| 120 | #### Integers near 31, 32, 62 bits
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| 121 |
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| 122 | # Hm this was never a bug, but it's worth testing.
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| 123 | # The bug was EvalToInt() in the condition.
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| 124 |
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| 125 | for base in 31 32 62; do
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| 126 |
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| 127 | start=$(( (1 << $base) - 2))
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| 128 | end=$(( (1 << $base) + 2))
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| 129 |
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| 130 | for ((i = start; i < end; ++i)); do
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| 131 | echo $i
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| 132 | done
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| 133 | echo ---
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| 134 | done
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| 135 |
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| 136 | ## STDOUT:
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| 137 | 2147483646
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| 138 | 2147483647
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| 139 | 2147483648
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| 140 | 2147483649
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| 141 | ---
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| 142 | 4294967294
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| 143 | 4294967295
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| 144 | 4294967296
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| 145 | 4294967297
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| 146 | ---
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| 147 | 4611686018427387902
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| 148 | 4611686018427387903
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| 149 | 4611686018427387904
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| 150 | 4611686018427387905
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| 151 | ---
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| 152 | ## END
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| 153 |
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| 154 |
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| 155 | #### Condition that's greater than 32 bits
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| 156 |
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| 157 | iters=0
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| 158 |
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| 159 | for ((i = 1 << 32; i; ++i)); do
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| 160 | echo $i
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| 161 | iters=$(( iters + 1 ))
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| 162 | if test $iters -eq 5; then
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| 163 | break
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| 164 | fi
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| 165 | done
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| 166 |
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| 167 | ## STDOUT:
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| 168 | 4294967296
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| 169 | 4294967297
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| 170 | 4294967298
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| 171 | 4294967299
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| 172 | 4294967300
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| 173 | ## END
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