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