| 1 | ## oils_failures_allowed: 0
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| 2 |
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| 3 | #### Pound char literal (is an integer TODO: could be ord())
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| 4 | const a = #'a'
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| 5 | const A = #'A'
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| 6 | echo "$a $A"
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| 7 | ## STDOUT:
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| 8 | 97 65
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| 9 | ## END
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| 10 |
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| 11 | #### The literal #''' isn't accepted (use \' instead)
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| 12 |
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| 13 | # This looks too much like triple quoted strings!
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| 14 |
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| 15 | echo nope
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| 16 | const bad = #'''
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| 17 | echo "$bad"
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| 18 |
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| 19 | ## status: 2
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| 20 | ## STDOUT:
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| 21 | nope
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| 22 | ## END
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| 23 |
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| 24 | #### Float Literals with e-1
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| 25 |
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| 26 | shopt -s ysh:upgrade
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| 27 | # 1+2 2.3
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| 28 | var x = 1.2 + 23.0e-1 # 3.5
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| 29 | if (3.4 < x and x < 3.6) {
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| 30 | echo ok
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| 31 | }
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| 32 | ## STDOUT:
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| 33 | ok
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| 34 | ## END
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| 35 |
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| 36 | #### Float Literal with _
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| 37 |
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| 38 | shopt -s ysh:upgrade
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| 39 |
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| 40 | # 1+2 + 2.3
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| 41 | # add this _ here
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| 42 | var x = 1.2 + 2_3.0e-1 # 3.5
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| 43 | if (3.4 < x and x < 3.6) {
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| 44 | echo ok
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| 45 | }
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| 46 |
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| 47 | ## STDOUT:
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| 48 | ok
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| 49 | ## END
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| 50 |
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| 51 |
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| 52 | #### Period requires digit on either side, not 5. or .5
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| 53 | echo $[0.5]
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| 54 | echo $[5.0]
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| 55 | echo $[5.]
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| 56 | echo $[.5]
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| 57 |
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| 58 | ## status: 2
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| 59 | ## STDOUT:
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| 60 | 0.5
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| 61 | 5.0
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| 62 | ## END
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| 63 |
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| 64 | #### Big float Literals with _
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| 65 |
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| 66 | # C++ issue: we currently print with snprintf %g
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| 67 | # Pars
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| 68 |
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| 69 | echo $[42_000.000_500]
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| 70 |
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| 71 | echo $[42_000.000_500e1]
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| 72 | echo $[42_000.000_500e-1]
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| 73 |
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| 74 | ## STDOUT:
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| 75 | 42000.0005
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| 76 | 420000.005
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| 77 | 4200.00005
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| 78 | ## END
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| 79 |
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| 80 | #### Big floats like 1e309 and -1e309 go to Inf / -Inf
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| 81 |
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| 82 | # Notes
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| 83 | # - Python float() and JS parseFloat() agree with this behavior
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| 84 | # - JSON doesn't have inf / -inf
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| 85 |
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| 86 | echo $[1e309]
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| 87 | echo $[-1e309]
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| 88 |
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| 89 | ## STDOUT:
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| 90 | inf
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| 91 | -inf
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| 92 | ## END
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| 93 |
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| 94 | #### Tiny floats go to zero
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| 95 |
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| 96 | shopt -s ysh:upgrade
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| 97 | # TODO: need equivalent of in YSh
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| 98 | # '0' * 309
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| 99 | # ['0'] * 309
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| 100 |
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| 101 | # 1e-324 == 0.0 in Python
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| 102 |
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| 103 | var zeros = []
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| 104 | for i in (1 .. 324) {
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| 105 | call zeros->append('0')
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| 106 | }
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| 107 |
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| 108 | #= zeros
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| 109 |
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| 110 | var s = "0.$[join(zeros)]1"
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| 111 | #echo $s
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| 112 |
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| 113 | echo float=$[float(s)]
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| 114 |
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| 115 | ## STDOUT:
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| 116 | float=0.0
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| 117 | ## END
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| 118 |
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| 119 |
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| 120 | #### floatEquals() INFINITY NAN
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| 121 |
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| 122 | shopt --set ysh:upgrade
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| 123 | source $LIB_YSH/list.ysh
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| 124 |
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| 125 | # Create inf
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| 126 | var big = repeat('12345678', 100) ++ '.0'
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| 127 |
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| 128 | var inf = fromJson(big)
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| 129 | var neg_inf = fromJson('-' ++ big)
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| 130 |
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| 131 | if (floatsEqual(inf, INFINITY)) {
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| 132 | echo inf
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| 133 | }
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| 134 |
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| 135 | if (floatsEqual(neg_inf, -INFINITY)) {
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| 136 | echo neg_inf
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| 137 | }
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| 138 |
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| 139 | if (floatsEqual(NAN, INFINITY)) {
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| 140 | echo bad
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| 141 | }
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| 142 |
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| 143 | if (floatsEqual(NAN, NAN)) {
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| 144 | echo bad
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| 145 | }
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| 146 |
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| 147 | if (not floatsEqual(NAN, NAN)) {
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| 148 | echo 'nan is not nan'
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| 149 | }
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| 150 |
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| 151 | ## STDOUT:
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| 152 | inf
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| 153 | neg_inf
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| 154 | nan is not nan
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| 155 | ## END
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| 156 |
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| 157 | #### Regression: 1/3 gives 0.3+
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| 158 |
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| 159 | # We were using float precision, not double
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| 160 |
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| 161 | shopt --set ysh:upgrade
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| 162 |
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| 163 | pp line (1/3) | read --all
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| 164 | if (_reply ~ / '0.' '3'+ / ) {
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| 165 | echo one-third
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| 166 | }
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| 167 |
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| 168 | pp line (2/3) | read --all
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| 169 | if (_reply ~ / '0.' '6'+ '7' / ) {
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| 170 | echo two-thirds
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| 171 | }
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| 172 |
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| 173 | ## STDOUT:
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| 174 | one-third
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| 175 | two-thirds
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| 176 | ## END
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| 177 |
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| 178 | #### Number of digits in 1/3
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| 179 | shopt --set ysh:upgrade
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| 180 |
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| 181 | # - Python 2 and bin/ysh: 14
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| 182 | # - Python 3: 18
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| 183 | # - YSH C++: 19 - see mycpp/float_test.cc, tip from Bruce Dawson
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| 184 |
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| 185 | var s = str(1/3)
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| 186 | #echo "ysh len $[len(s)]"
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| 187 | #echo ysh=$s
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| 188 |
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| 189 | # Don't bother to distinguish OSH Python vs C++ here
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| 190 | case (len(s)) {
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| 191 | (14) { echo pass }
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| 192 | (19) { echo pass }
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| 193 | (else) { echo FAIL }
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| 194 | }
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| 195 |
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| 196 | exit
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| 197 |
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| 198 | var py2 = $(python2 -c 'print(1.0/3)')
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| 199 | echo "py2 len $[len(py2)]"
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| 200 | echo py2=$py2
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| 201 |
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| 202 | var py3 = $(python3 -c 'print(1/3)')
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| 203 | echo "py3 len $[len(py3)]"
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| 204 | echo py3=$py3
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| 205 |
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| 206 | ## STDOUT:
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| 207 | pass
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| 208 | ## END
|