1 | #### Pound char literal (is an integer TODO: could be ord())
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2 | const a = #'a'
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3 | const A = #'A'
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4 | echo "$a $A"
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5 | ## STDOUT:
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6 | 97 65
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7 | ## END
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8 |
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9 | #### The literal #''' isn't accepted (use \' instead)
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10 |
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11 | # This looks too much like triple quoted strings!
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12 |
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13 | echo nope
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14 | const bad = #'''
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15 | echo "$bad"
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16 |
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17 | ## status: 2
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18 | ## STDOUT:
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19 | nope
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20 | ## END
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21 |
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22 | #### Float Literals with e-1
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23 |
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24 | shopt -s ysh:upgrade
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25 | # 1+2 2.3
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26 | var x = 1.2 + 23.0e-1 # 3.5
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27 | if (3.4 < x and x < 3.6) {
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28 | echo ok
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29 | }
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30 | ## STDOUT:
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31 | ok
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32 | ## END
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33 |
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34 | #### Float Literal with _
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35 |
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36 | shopt -s ysh:upgrade
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37 |
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38 | # 1+2 + 2.3
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39 | # add this _ here
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40 | var x = 1.2 + 2_3.0e-1 # 3.5
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41 | if (3.4 < x and x < 3.6) {
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42 | echo ok
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43 | }
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44 |
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45 | ## STDOUT:
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46 | ok
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47 | ## END
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48 |
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49 |
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50 | #### Period requires digit on either side, not 5. or .5
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51 | echo $[0.5]
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52 | echo $[5.0]
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53 | echo $[5.]
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54 | echo $[.5]
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55 |
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56 | ## status: 2
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57 | ## STDOUT:
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58 | 0.5
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59 | 5.0
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60 | ## END
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61 |
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62 | #### Big float Literals with _
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63 |
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64 | # C++ issue: we currently print with snprintf %g
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65 | # Pars
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66 |
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67 | echo $[42_000.000_500]
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68 |
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69 | echo $[42_000.000_500e1]
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70 | echo $[42_000.000_500e-1]
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71 |
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72 | ## STDOUT:
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73 | 42000.0005
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74 | 420000.005
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75 | 4200.00005
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76 | ## END
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77 |
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78 | #### Big floats like 1e309 and -1e309 go to Inf / -Inf
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79 |
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80 | # Notes
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81 | # - Python float() and JS parseFloat() agree with this behavior
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82 | # - JSON doesn't have inf / -inf
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83 |
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84 | echo $[1e309]
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85 | echo $[-1e309]
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86 |
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87 | ## STDOUT:
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88 | inf
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89 | -inf
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90 | ## END
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91 |
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92 | #### Tiny floats go to zero
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93 |
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94 | shopt -s ysh:upgrade
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95 | # TODO: need equivalent of in YSh
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96 | # '0' * 309
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97 | # ['0'] * 309
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98 |
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99 | # 1e-324 == 0.0 in Python
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100 |
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101 | var zeros = []
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102 | for i in (1 .. 324) {
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103 | call zeros->append('0')
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104 | }
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105 |
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106 | #= zeros
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107 |
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108 | var s = "0.$[join(zeros)]1"
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109 | #echo $s
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110 |
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111 | echo float=$[float(s)]
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112 |
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113 | ## STDOUT:
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114 | float=0.0
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115 | ## END
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116 |
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