1 |
## compare_shells: bash dash mksh zsh
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2 |
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3 |
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4 |
# Interesting interpretation of constants.
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5 |
#
|
6 |
# "Constants with a leading 0 are interpreted as octal numbers. A leading ‘0x’
|
7 |
# or ‘0X’ denotes hexadecimal. Otherwise, numbers take the form [base#]n, where
|
8 |
# the optional base is a decimal number between 2 and 64 representing the
|
9 |
# arithmetic base, and n is a number in that base. If base# is omitted, then
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10 |
# base 10 is used. When specifying n, the digits greater than 9 are represented
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11 |
# by the lowercase letters, the uppercase letters, ‘@’, and ‘_’, in that order.
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12 |
# If base is less than or equal to 36, lowercase and uppercase letters may be
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13 |
# used interchangeably to represent numbers between 10 and 35. "
|
14 |
#
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15 |
# NOTE $(( 8#9 )) can fail, and this can be done at parse time...
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16 |
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17 |
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18 |
a=(4 5 6)
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19 |
echo "${a[b=2]} b=$b"
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20 |
## stdout: 6 b=2
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21 |
## OK zsh stdout: 5 b=2
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22 |
## N-I dash stdout-json: ""
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23 |
## N-I dash status: 2
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24 |
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25 |
|
26 |
i=1
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27 |
echo $(($i+1))
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28 |
## stdout: 2
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29 |
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30 |
|
31 |
i=1
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32 |
echo $((i+1))
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33 |
## stdout: 2
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34 |
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35 |
|
36 |
j=0
|
37 |
echo $(($j + 42))
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38 |
## stdout: 42
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39 |
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40 |
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41 |
echo $((${j:-5} + 1))
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42 |
## stdout: 6
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43 |
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44 |
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45 |
foo=1; echo $((foo+1))bar$(($foo+1))
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46 |
## stdout: 2bar2
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47 |
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48 |
|
49 |
# Making 13 from two different kinds of sub. Geez.
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50 |
echo $((1 + $(echo 1)${undefined:-3}))
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51 |
## stdout: 14
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52 |
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53 |
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54 |
# NOTE: Compare with [[. That is a COMMAND level expression, while this is a
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55 |
# WORD level expression.
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56 |
echo $(('1' + 2))
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57 |
## status: 0
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58 |
## N-I bash/zsh status: 1
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59 |
## N-I dash status: 2
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60 |
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61 |
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62 |
# This is unnecessary but works in all shells.
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63 |
echo $((1 + $((2 + 3)) + 4))
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64 |
## stdout: 10
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65 |
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66 |
|
67 |
# This is unnecessary but works in all shells.
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68 |
echo $((`echo 1` + 2))
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69 |
## stdout: 3
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70 |
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71 |
|
72 |
# bash, mksh, and zsh all treat strings that don't look like numbers as zero.
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73 |
shopt -u strict_arith || true
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74 |
s=foo
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75 |
echo $((s+5))
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76 |
## OK dash stdout-json: ""
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77 |
## OK dash status: 2
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78 |
## OK bash/mksh/zsh/osh stdout: 5
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79 |
## OK bash/mksh/zsh/osh status: 0
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80 |
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81 |
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82 |
shopt -s strict_arith || true
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83 |
s=foo
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84 |
echo $s
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85 |
echo $((s+5))
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86 |
echo 'should not get here'
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87 |
## status: 1
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88 |
## STDOUT:
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89 |
foo
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90 |
## END
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91 |
## OK dash status: 2
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92 |
## N-I bash/mksh/zsh STDOUT:
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93 |
foo
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94 |
5
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95 |
should not get here
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96 |
## END
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97 |
## N-I bash/mksh/zsh status: 0
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98 |
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99 |
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100 |
echo $(( 0x12A ))
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101 |
echo $(( 0x0A ))
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102 |
echo $(( 0777 ))
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103 |
echo $(( 0010 ))
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104 |
echo $(( 24#ag7 ))
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105 |
## STDOUT:
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106 |
298
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107 |
10
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108 |
511
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109 |
8
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110 |
6151
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111 |
## END
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112 |
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113 |
## N-I dash status: 2
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114 |
## N-I dash STDOUT:
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115 |
298
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116 |
10
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117 |
511
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118 |
8
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## END
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120 |
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## BUG zsh STDOUT:
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122 |
298
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123 |
10
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124 |
777
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125 |
10
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126 |
6151
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## END
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128 |
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## BUG mksh STDOUT:
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130 |
298
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131 |
10
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777
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133 |
10
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6151
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## END
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check() {
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139 |
$SH -c "shopt --set strict_arith; echo $1"
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echo status=$?
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}
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143 |
check '$(( 0x1X ))'
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144 |
check '$(( 09 ))'
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145 |
check '$(( 2#A ))'
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146 |
check '$(( 02#0110 ))'
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147 |
## STDOUT:
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148 |
status=1
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149 |
status=1
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150 |
status=1
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151 |
status=1
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152 |
## END
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153 |
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## OK dash STDOUT:
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155 |
status=2
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156 |
status=2
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157 |
status=2
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158 |
status=2
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159 |
## END
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160 |
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## BUG zsh STDOUT:
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162 |
status=1
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163 |
9
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status=0
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165 |
status=1
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166 |
6
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167 |
status=0
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## END
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169 |
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## BUG mksh STDOUT:
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171 |
status=1
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172 |
9
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173 |
status=0
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174 |
status=1
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175 |
6
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176 |
status=0
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177 |
## END
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178 |
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180 |
echo $((1
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181 |
+ 2))
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182 |
## stdout: 3
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183 |
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184 |
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a=1
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186 |
b=2
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187 |
echo $((a>b?5:10))
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## stdout: 10
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189 |
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190 |
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a=4
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192 |
echo $((++a))
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193 |
echo $a
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194 |
## STDOUT:
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195 |
5
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196 |
5
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197 |
## END
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198 |
## N-I dash status: 0
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199 |
## N-I dash STDOUT:
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200 |
4
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201 |
4
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202 |
## END
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203 |
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204 |
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a=4
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206 |
echo $((a++))
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207 |
echo $a
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## STDOUT:
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209 |
4
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210 |
5
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## END
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212 |
## N-I dash status: 2
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213 |
## N-I dash stdout-json: ""
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214 |
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215 |
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216 |
shopt -u strict_arith || true
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217 |
(( undef1++ ))
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218 |
(( ++undef2 ))
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219 |
echo "[$undef1][$undef2]"
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220 |
## stdout: [1][1]
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221 |
## N-I dash stdout: [][]
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222 |
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223 |
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224 |
shopt -u strict_arith || true
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225 |
a=(5 6 7 8)
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226 |
(( a[0]++, ++a[1], a[2]--, --a[3] ))
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227 |
(( undef[0]++, ++undef[1], undef[2]--, --undef[3] ))
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228 |
echo "${a[@]}" - "${undef[@]}"
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229 |
## stdout: 6 7 6 7 - 1 1 -1 -1
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230 |
## N-I dash stdout-json: ""
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231 |
## N-I dash status: 2
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232 |
## BUG zsh stdout: 5 6 7 8 -
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233 |
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234 |
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235 |
set -o nounset
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236 |
(( undef1++ ))
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237 |
(( ++undef2 ))
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238 |
echo "[$undef1][$undef2]"
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239 |
## stdout-json: ""
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240 |
## status: 1
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241 |
## OK dash status: 2
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242 |
## BUG mksh/zsh status: 0
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243 |
## BUG mksh/zsh STDOUT:
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244 |
[1][1]
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245 |
## END
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246 |
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247 |
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248 |
a=1
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249 |
b=2
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250 |
echo $((a,(b+1)))
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251 |
## stdout: 3
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252 |
## N-I dash status: 2
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253 |
## N-I dash stdout-json: ""
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254 |
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255 |
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256 |
a=4
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257 |
echo $((a+=1))
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258 |
echo $a
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259 |
## STDOUT:
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260 |
5
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261 |
5
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262 |
## END
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263 |
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264 |
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265 |
echo $(( 1 == 1 ))
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266 |
echo $(( 1 != 1 ))
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267 |
echo $(( 1 < 1 ))
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268 |
echo $(( 1 <= 1 ))
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269 |
echo $(( 1 > 1 ))
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270 |
echo $(( 1 >= 1 ))
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271 |
## STDOUT:
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272 |
1
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273 |
0
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274 |
0
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275 |
1
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276 |
0
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277 |
1
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278 |
## END
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279 |
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280 |
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281 |
echo $((1 || 2))
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282 |
echo $((1 && 2))
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283 |
echo $((!(1 || 2)))
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284 |
## STDOUT:
|
285 |
1
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286 |
1
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287 |
0
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288 |
## END
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289 |
|
290 |
|
291 |
x=11
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292 |
(( 1 || (x = 22) ))
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293 |
echo $x
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294 |
(( 0 || (x = 33) ))
|
295 |
echo $x
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296 |
(( 0 && (x = 44) ))
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297 |
echo $x
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298 |
(( 1 && (x = 55) ))
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299 |
echo $x
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300 |
## STDOUT:
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301 |
11
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302 |
33
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303 |
33
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304 |
55
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305 |
## END
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306 |
## N-I dash STDOUT:
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307 |
11
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308 |
11
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309 |
11
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310 |
11
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311 |
## END
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312 |
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313 |
|
314 |
echo $((1|2))
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315 |
echo $((1&2))
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316 |
echo $((1^2))
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317 |
echo $((~(1|2)))
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318 |
## STDOUT:
|
319 |
3
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320 |
0
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321 |
3
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322 |
-4
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323 |
## END
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324 |
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325 |
|
326 |
a=1
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327 |
b=3
|
328 |
echo $((- a + + b))
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329 |
## STDOUT:
|
330 |
2
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331 |
## END
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332 |
|
333 |
|
334 |
echo $((1 + 2.3))
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335 |
## status: 2
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336 |
## OK bash/mksh status: 1
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337 |
## BUG zsh status: 0
|
338 |
|
339 |
|
340 |
# zsh does 1-based indexing!
|
341 |
array=(1 2 3 4)
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342 |
echo $((array[1] + array[2]*3))
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343 |
## stdout: 11
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344 |
## OK zsh stdout: 7
|
345 |
## N-I dash status: 2
|
346 |
## N-I dash stdout-json: ""
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347 |
|
348 |
|
349 |
echo $((36#a))-$((36#z))
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350 |
## stdout: 10-35
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351 |
## N-I dash stdout-json: ""
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352 |
## N-I dash status: 2
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353 |
|
354 |
|
355 |
# This is a truly bizarre syntax. Oh it comes from zsh... which allows 36.
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356 |
echo $((64#a))-$((64#z)), $((64#A))-$((64#Z)), $((64#@)), $(( 64#_ ))
|
357 |
## stdout: 10-35, 36-61, 62, 63
|
358 |
## N-I dash stdout-json: ""
|
359 |
## N-I dash status: 2
|
360 |
## N-I mksh/zsh stdout-json: ""
|
361 |
## N-I mksh/zsh status: 1
|
362 |
|
363 |
|
364 |
echo $((10#0123)), $((16#1b))
|
365 |
## stdout: 123, 27
|
366 |
## N-I dash stdout-json: ""
|
367 |
## N-I dash status: 2
|
368 |
|
369 |
|
370 |
base=16
|
371 |
echo $(( ${base}#a ))
|
372 |
## stdout: 10
|
373 |
## N-I dash stdout-json: ""
|
374 |
## N-I dash status: 2
|
375 |
|
376 |
|
377 |
echo $(( 011 ))
|
378 |
## stdout: 9
|
379 |
## N-I mksh/zsh stdout: 11
|
380 |
|
381 |
|
382 |
zero=0
|
383 |
echo $(( ${zero}11 ))
|
384 |
## stdout: 9
|
385 |
## N-I mksh/zsh stdout: 11
|
386 |
|
387 |
|
388 |
zero=0
|
389 |
echo $(( ${zero}xAB ))
|
390 |
## stdout: 171
|
391 |
|
392 |
|
393 |
foo=5
|
394 |
x=oo
|
395 |
echo $(( foo + f$x + 1 ))
|
396 |
## stdout: 11
|
397 |
|
398 |
|
399 |
foo=5
|
400 |
bar=foo
|
401 |
spam=bar
|
402 |
eggs=spam
|
403 |
echo $((foo+1)) $((bar+1)) $((spam+1)) $((eggs+1))
|
404 |
## stdout: 6 6 6 6
|
405 |
## N-I dash stdout-json: ""
|
406 |
## N-I dash status: 2
|
407 |
|
408 |
|
409 |
set -o nounset
|
410 |
x=$(( y + 5 ))
|
411 |
echo "should not get here: x=${x:-<unset>}"
|
412 |
## stdout-json: ""
|
413 |
## status: 1
|
414 |
## BUG dash/mksh/zsh stdout: should not get here: x=5
|
415 |
## BUG dash/mksh/zsh status: 0
|
416 |
|
417 |
|
418 |
|
419 |
a=$(( 1 << 31 ))
|
420 |
echo $a
|
421 |
|
422 |
b=$(( a + a ))
|
423 |
echo $b
|
424 |
|
425 |
c=$(( b + a ))
|
426 |
echo $c
|
427 |
|
428 |
x=$(( 1 << 62 ))
|
429 |
y=$(( x - 1 ))
|
430 |
echo "max positive = $(( x + y ))"
|
431 |
|
432 |
#echo "overflow $(( x + x ))"
|
433 |
|
434 |
## STDOUT:
|
435 |
2147483648
|
436 |
4294967296
|
437 |
6442450944
|
438 |
max positive = 9223372036854775807
|
439 |
## END
|
440 |
|
441 |
# mksh still uses int!
|
442 |
## BUG mksh STDOUT:
|
443 |
-2147483648
|
444 |
0
|
445 |
-2147483648
|
446 |
max positive = 2147483647
|
447 |
## END
|
448 |
|
449 |
|
450 |
case $SH in dash) exit ;; esac
|
451 |
|
452 |
#shopt -s strict_arith
|
453 |
|
454 |
# This overflows - the extra 9 puts it above 2**31
|
455 |
#echo $(( 12345678909 ))
|
456 |
|
457 |
[[ 12345678909 = $(( 1 << 30 )) ]]
|
458 |
echo eq=$?
|
459 |
[[ 12345678909 = 12345678909 ]]
|
460 |
echo eq=$?
|
461 |
|
462 |
# Try both [ and [[
|
463 |
[ 12345678909 -gt $(( 1 << 30 )) ]
|
464 |
echo greater=$?
|
465 |
[[ 12345678909 -gt $(( 1 << 30 )) ]]
|
466 |
echo greater=$?
|
467 |
|
468 |
[[ 12345678909 -ge $(( 1 << 30 )) ]]
|
469 |
echo ge=$?
|
470 |
[[ 12345678909 -ge 12345678909 ]]
|
471 |
echo ge=$?
|
472 |
|
473 |
[[ 12345678909 -le $(( 1 << 30 )) ]]
|
474 |
echo le=$?
|
475 |
[[ 12345678909 -le 12345678909 ]]
|
476 |
echo le=$?
|
477 |
|
478 |
## STDOUT:
|
479 |
eq=1
|
480 |
eq=0
|
481 |
greater=0
|
482 |
greater=0
|
483 |
ge=0
|
484 |
ge=0
|
485 |
le=1
|
486 |
le=0
|
487 |
## END
|
488 |
## N-I dash STDOUT:
|
489 |
## END
|
490 |
## BUG mksh STDOUT:
|
491 |
eq=1
|
492 |
eq=0
|
493 |
greater=1
|
494 |
greater=1
|
495 |
ge=1
|
496 |
ge=0
|
497 |
le=0
|
498 |
le=0
|
499 |
## END
|
500 |
|
501 |
# mksh still uses int!
|
502 |
|
503 |
|
504 |
a=9
|
505 |
(( (a + 2) = 3 ))
|
506 |
echo $a
|
507 |
## status: 2
|
508 |
## stdout-json: ""
|
509 |
## OK bash/mksh/zsh stdout: 9
|
510 |
## OK bash/mksh/zsh status: 0
|
511 |
# dash doesn't implement assignment
|
512 |
## N-I dash status: 2
|
513 |
## N-I dash stdout-json: ""
|
514 |
|
515 |
|
516 |
(( 1[2] = 3 ))
|
517 |
echo "status=$?"
|
518 |
## status: 1
|
519 |
## stdout-json: ""
|
520 |
|
521 |
## OK bash stdout: status=1
|
522 |
## OK bash status: 0
|
523 |
|
524 |
## OK mksh/zsh stdout: status=2
|
525 |
## OK mksh/zsh status: 0
|
526 |
|
527 |
## N-I dash stdout: status=127
|
528 |
## N-I dash status: 0
|
529 |
|
530 |
|
531 |
(( a[1][2] = 3 ))
|
532 |
echo "status=$?"
|
533 |
# shells treat this as a NON-fatal error
|
534 |
## status: 2
|
535 |
## stdout-json: ""
|
536 |
## OK bash stdout: status=1
|
537 |
## OK mksh/zsh stdout: status=2
|
538 |
## OK bash/mksh/zsh status: 0
|
539 |
# dash doesn't implement assignment
|
540 |
## N-I dash stdout: status=127
|
541 |
## N-I dash status: 0
|
542 |
|
543 |
|
544 |
echo $(( 1 + 2*3 - 8/2 ))
|
545 |
## stdout: 3
|
546 |
|
547 |
|
548 |
echo $(( 3 ** 0 ))
|
549 |
echo $(( 3 ** 1 ))
|
550 |
echo $(( 3 ** 2 ))
|
551 |
## STDOUT:
|
552 |
1
|
553 |
3
|
554 |
9
|
555 |
## END
|
556 |
## N-I dash stdout-json: ""
|
557 |
## N-I dash status: 2
|
558 |
## N-I mksh stdout-json: ""
|
559 |
## N-I mksh status: 1
|
560 |
|
561 |
|
562 |
# NOTE: All shells agree on this, but R and Python give -9, which is more
|
563 |
# mathematically correct.
|
564 |
echo $(( -3 ** 2 ))
|
565 |
## stdout: 9
|
566 |
## N-I dash stdout-json: ""
|
567 |
## N-I dash status: 2
|
568 |
## N-I mksh stdout-json: ""
|
569 |
## N-I mksh status: 1
|
570 |
|
571 |
|
572 |
# bash explicitly disallows negative exponents!
|
573 |
echo $(( 2**-1 * 5 ))
|
574 |
## stdout-json: ""
|
575 |
## status: 1
|
576 |
## OK zsh stdout: 2.5
|
577 |
## OK zsh status: 0
|
578 |
## N-I dash stdout-json: ""
|
579 |
## N-I dash status: 2
|
580 |
|
581 |
|
582 |
echo $((
|
583 |
1 +
|
584 |
2 + \
|
585 |
3
|
586 |
))
|
587 |
echo $((
|
588 |
1 + 2 # not a comment
|
589 |
))
|
590 |
(( a = 3 + 4 # comment
|
591 |
))
|
592 |
echo [$a]
|
593 |
## status: 1
|
594 |
## STDOUT:
|
595 |
6
|
596 |
## END
|
597 |
## OK dash/osh status: 2
|
598 |
## OK bash STDOUT:
|
599 |
6
|
600 |
[]
|
601 |
## END
|
602 |
## OK bash status: 0
|
603 |
|
604 |
|
605 |
declare -a array=(1 2 3)
|
606 |
echo $((array + 5))
|
607 |
## status: 0
|
608 |
## STDOUT:
|
609 |
6
|
610 |
## END
|
611 |
## N-I dash status: 2
|
612 |
## N-I dash stdout-json: ""
|
613 |
## N-I mksh/zsh status: 1
|
614 |
## N-I mksh/zsh stdout-json: ""
|
615 |
|
616 |
|
617 |
typeset -A assoc
|
618 |
assoc[0]=42
|
619 |
echo $((assoc + 5))
|
620 |
## status: 0
|
621 |
## stdout: 47
|
622 |
## BUG dash status: 0
|
623 |
## BUG dash stdout: 5
|
624 |
|
625 |
|
626 |
a=(1 2 3)
|
627 |
echo $(( a[1] ))
|
628 |
echo $(( a[1][1] ))
|
629 |
## status: 1
|
630 |
## OK osh status: 2
|
631 |
## STDOUT:
|
632 |
2
|
633 |
## END
|
634 |
## N-I dash status: 2
|
635 |
## N-I dash stdout-json: ""
|
636 |
## OK zsh STDOUT:
|
637 |
1
|
638 |
## END
|
639 |
|
640 |
|
641 |
a=(4 5 6)
|
642 |
echo declared
|
643 |
b=$(( a ))
|
644 |
echo $b
|
645 |
|
646 |
## status: 0
|
647 |
## STDOUT:
|
648 |
declared
|
649 |
4
|
650 |
## END
|
651 |
## N-I dash status: 2
|
652 |
## N-I dash stdout-json: ""
|
653 |
## N-I zsh status: 1
|
654 |
## N-I zsh STDOUT:
|
655 |
declared
|
656 |
## END
|
657 |
|
658 |
|
659 |
declare -A A=(['foo']=bar ['spam']=eggs)
|
660 |
echo declared
|
661 |
b=$(( A ))
|
662 |
echo $b
|
663 |
|
664 |
## status: 0
|
665 |
## STDOUT:
|
666 |
declared
|
667 |
0
|
668 |
## END
|
669 |
|
670 |
## N-I mksh status: 1
|
671 |
## N-I mksh stdout-json: ""
|
672 |
|
673 |
|
674 |
## N-I dash status: 2
|
675 |
## N-I dash stdout-json: ""
|
676 |
|
677 |
|
678 |
a=(4 5 6)
|
679 |
|
680 |
# zsh and osh can't evaluate the array like that
|
681 |
# which is consistent with their behavior on $(( a ))
|
682 |
|
683 |
echo $(( a, last = a[2], 42 ))
|
684 |
echo last=$last
|
685 |
|
686 |
## status: 0
|
687 |
## STDOUT:
|
688 |
42
|
689 |
last=6
|
690 |
## END
|
691 |
## N-I dash status: 2
|
692 |
## N-I dash stdout-json: ""
|
693 |
## N-I zsh status: 1
|
694 |
## N-I zsh stdout-json: ""
|
695 |
|
696 |
|
697 |
|
698 |
foo=bar
|
699 |
echo $(( x$foo = 42 ))
|
700 |
echo xbar=$xbar
|
701 |
## STDOUT:
|
702 |
42
|
703 |
xbar=42
|
704 |
## END
|
705 |
|
706 |
|
707 |
foo=bar
|
708 |
echo $(( x$foo[5] = 42 ))
|
709 |
echo 'xbar[5]='${xbar[5]}
|
710 |
## STDOUT:
|
711 |
42
|
712 |
xbar[5]=42
|
713 |
## END
|
714 |
## BUG zsh STDOUT:
|
715 |
42
|
716 |
xbar[5]=
|
717 |
## END
|
718 |
## N-I dash status: 2
|
719 |
## N-I dash stdout-json: ""
|
720 |
|
721 |
|
722 |
foo=bar
|
723 |
xbar=42
|
724 |
echo $(( x$foo++ ))
|
725 |
echo xbar=$xbar
|
726 |
## STDOUT:
|
727 |
42
|
728 |
xbar=43
|
729 |
## END
|
730 |
## BUG dash status: 2
|
731 |
## BUG dash stdout-json: ""
|
732 |
|
733 |
|
734 |
foo=bar
|
735 |
xbar[5]=42
|
736 |
echo $(( x$foo[5]++ ))
|
737 |
echo 'xbar[5]='${xbar[5]}
|
738 |
## STDOUT:
|
739 |
42
|
740 |
xbar[5]=43
|
741 |
## END
|
742 |
## BUG zsh STDOUT:
|
743 |
0
|
744 |
xbar[5]=42
|
745 |
## END
|
746 |
## N-I dash status: 2
|
747 |
## N-I dash stdout-json: ""
|
748 |
|
749 |
|
750 |
e=1+2
|
751 |
echo $(( e + 3 ))
|
752 |
[[ e -eq 3 ]] && echo true
|
753 |
[ e -eq 3 ]
|
754 |
echo status=$?
|
755 |
## STDOUT:
|
756 |
6
|
757 |
true
|
758 |
status=2
|
759 |
## END
|
760 |
## BUG mksh STDOUT:
|
761 |
6
|
762 |
true
|
763 |
status=0
|
764 |
## END
|
765 |
## N-I dash status: 2
|
766 |
## N-I dash stdout-json: ""
|
767 |
|
768 |
|
769 |
a=''
|
770 |
echo $(( a ))
|
771 |
|
772 |
a2=' '
|
773 |
echo $(( a2 ))
|
774 |
## STDOUT:
|
775 |
0
|
776 |
0
|
777 |
## END
|
778 |
|
779 |
|
780 |
echo $((1?2?3:4:5))
|
781 |
## STDOUT:
|
782 |
3
|
783 |
## END
|
784 |
|
785 |
|
786 |
echo $((1 ? a=1 : 42 ))
|
787 |
echo a=$a
|
788 |
|
789 |
# this does NOT work
|
790 |
#echo $((1 ? a=1 : b=2 ))
|
791 |
|
792 |
## STDOUT:
|
793 |
1
|
794 |
a=1
|
795 |
## END
|
796 |
## BUG zsh stdout-json: ""
|
797 |
## BUG zsh status: 1
|
798 |
|
799 |
|
800 |
|
801 |
echo $((a + x42))
|
802 |
echo status=$?
|
803 |
|
804 |
# weird asymmetry -- the above is a syntax error, but this isn't
|
805 |
$SH -c 'echo $((a + 42x))'
|
806 |
echo status=$?
|
807 |
|
808 |
# regression
|
809 |
echo $((a + 42x))
|
810 |
echo status=$?
|
811 |
## status: 1
|
812 |
## STDOUT:
|
813 |
0
|
814 |
status=0
|
815 |
status=1
|
816 |
## END
|
817 |
## OK dash status: 2
|
818 |
## OK dash STDOUT:
|
819 |
0
|
820 |
status=0
|
821 |
status=2
|
822 |
## END
|
823 |
## BUG bash status: 0
|
824 |
## BUG bash STDOUT:
|
825 |
0
|
826 |
status=0
|
827 |
status=1
|
828 |
status=1
|
829 |
## END
|
830 |
|
831 |
|
832 |
|
833 |
echo $(( 10 / 3))
|
834 |
echo $((-10 / 3))
|
835 |
echo $(( 10 / -3))
|
836 |
echo $((-10 / -3))
|
837 |
|
838 |
echo ---
|
839 |
|
840 |
a=20
|
841 |
: $(( a /= 3 ))
|
842 |
echo $a
|
843 |
|
844 |
a=-20
|
845 |
: $(( a /= 3 ))
|
846 |
echo $a
|
847 |
|
848 |
a=20
|
849 |
: $(( a /= -3 ))
|
850 |
echo $a
|
851 |
|
852 |
a=-20
|
853 |
: $(( a /= -3 ))
|
854 |
echo $a
|
855 |
|
856 |
## STDOUT:
|
857 |
3
|
858 |
-3
|
859 |
-3
|
860 |
3
|
861 |
---
|
862 |
6
|
863 |
-6
|
864 |
-6
|
865 |
6
|
866 |
## END
|
867 |
|
868 |
|
869 |
|
870 |
echo $(( 10 % 3))
|
871 |
echo $((-10 % 3))
|
872 |
echo $(( 10 % -3))
|
873 |
echo $((-10 % -3))
|
874 |
|
875 |
## STDOUT:
|
876 |
1
|
877 |
-1
|
878 |
1
|
879 |
-1
|
880 |
## END
|
881 |
|
882 |
|
883 |
|
884 |
echo $(( 5 << 1 ))
|
885 |
echo $(( 5 << 0 ))
|
886 |
$SH -c 'echo $(( 5 << -1 ))' # implementation defined - OSH fails
|
887 |
echo ---
|
888 |
|
889 |
echo $(( 16 >> 1 ))
|
890 |
echo $(( 16 >> 0 ))
|
891 |
$SH -c 'echo $(( 16 >> -1 ))' # not sure why this is zero
|
892 |
$SH -c 'echo $(( 16 >> -2 ))' # also 0
|
893 |
echo ---
|
894 |
|
895 |
## STDOUT:
|
896 |
10
|
897 |
5
|
898 |
---
|
899 |
8
|
900 |
16
|
901 |
---
|
902 |
## END
|
903 |
|
904 |
## OK bash/dash/zsh STDOUT:
|
905 |
10
|
906 |
5
|
907 |
-9223372036854775808
|
908 |
---
|
909 |
8
|
910 |
16
|
911 |
0
|
912 |
0
|
913 |
---
|
914 |
## END
|
915 |
|
916 |
## BUG mksh STDOUT:
|
917 |
10
|
918 |
5
|
919 |
-2147483648
|
920 |
---
|
921 |
8
|
922 |
16
|
923 |
0
|
924 |
0
|
925 |
---
|
926 |
## END
|
927 |
|
928 |
|
929 |
case $SH in dash) exit ;; esac
|
930 |
|
931 |
echo ARITH $(( undef[0] ))
|
932 |
echo status=$?
|
933 |
echo
|
934 |
|
935 |
(( undef[0] ))
|
936 |
echo status=$?
|
937 |
echo
|
938 |
|
939 |
echo UNDEF ${undef[0]}
|
940 |
echo status=$?
|
941 |
|
942 |
## STDOUT:
|
943 |
ARITH 0
|
944 |
status=0
|
945 |
|
946 |
status=1
|
947 |
|
948 |
UNDEF
|
949 |
status=0
|
950 |
## END
|
951 |
## N-I dash STDOUT:
|
952 |
## END
|
953 |
|
954 |
|
955 |
case $SH in dash) exit ;; esac
|
956 |
|
957 |
set -o nounset
|
958 |
echo UNSET $(( undef[0] ))
|
959 |
echo status=$?
|
960 |
|
961 |
## status: 1
|
962 |
## STDOUT:
|
963 |
## END
|
964 |
|
965 |
## N-I dash status: 0
|
966 |
|
967 |
## BUG mksh/zsh status: 0
|
968 |
## BUG mksh/zsh STDOUT:
|
969 |
UNSET 0
|
970 |
status=0
|
971 |
## END
|
972 |
|
973 |
## N-I dash STDOUT:
|
974 |
## END
|
975 |
|
976 |
|
977 |
case $SH in dash) exit ;; esac
|
978 |
|
979 |
s='abc'
|
980 |
echo abc $(( s[0] )) $(( s[1] ))
|
981 |
echo status=$?
|
982 |
echo
|
983 |
|
984 |
(( s[0] ))
|
985 |
echo status=$?
|
986 |
echo
|
987 |
|
988 |
## STDOUT:
|
989 |
abc 0 0
|
990 |
status=0
|
991 |
|
992 |
status=1
|
993 |
|
994 |
## END
|
995 |
## N-I dash STDOUT:
|
996 |
## END
|
997 |
|
998 |
|
999 |
case $SH in dash) exit ;; esac
|
1000 |
|
1001 |
s='42'
|
1002 |
echo 42 $(( s[0] )) $(( s[1] ))
|
1003 |
echo status=$?
|
1004 |
|
1005 |
## STDOUT:
|
1006 |
42 42 0
|
1007 |
status=0
|
1008 |
## END
|
1009 |
## N-I dash STDOUT:
|
1010 |
## END
|
1011 |
|
1012 |
## BUG zsh STDOUT:
|
1013 |
42 0 4
|
1014 |
status=0
|
1015 |
## END
|
1016 |
|
1017 |
|
1018 |
|
1019 |
s='12 34'
|
1020 |
echo '12 34' $(( s[0] )) $(( s[1] ))
|
1021 |
echo status=$?
|
1022 |
|
1023 |
## status: 1
|
1024 |
## STDOUT:
|
1025 |
## END
|
1026 |
|
1027 |
## OK dash status: 2
|
1028 |
|
1029 |
## BUG zsh status: 0
|
1030 |
## BUG zsh STDOUT:
|
1031 |
12 34 0 1
|
1032 |
status=0
|
1033 |
## END
|
1034 |
|
1035 |
# bash prints an error, but doesn't fail
|
1036 |
|
1037 |
## BUG bash status: 0
|
1038 |
## BUG bash STDOUT:
|
1039 |
status=1
|
1040 |
## END
|