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1 *ft_raku.txt* The Raku programming language filetype
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2
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3 *vim-raku*
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4
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5 Vim-raku provides syntax highlighting, indentation, and other support for
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6 editing Raku programs.
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7
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8 1. Using Unicode in your Raku files |raku-unicode|
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9
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10 ==============================================================================
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11 1. Using Unicode in your Raku files *raku-unicode*
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12
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13 Defining new operators using Unicode symbols is a good way to make your
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14 Raku program easy to read. See:
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15 https://perl6advent.wordpress.com/2012/12/18/day-18-formulas-resistance-is-futile/
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16
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17 While Raku does define ASCII alternatives for some common operators (see
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18 https://docs.raku.org/language/unicode_ascii), using the full range of
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19 Unicode operators is highly desirable. Your operating system provides input
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20 facilities, but using the features built in to Vim may be preferable.
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21
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22 The natural way to produce these symbols in Vim is to use digraph shortcuts
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23 (:help |digraphs-use|). Many of them are defined; type `:digraphs` to get
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24 the list. A convenient way to read the list of digraphs is to save them in a
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25 file. From the shell: >
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26 vim +'redir >/tmp/vim-digraphs-listing.txt' +digraphs +'redir END' +q
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27
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28 Some of them are available with standard Vim digraphs:
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29 << « /0 ∅ !< ≮ ~
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30 >> » Ob ∘ !> ≯ ~
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31 ., … 00 ∞ (C ⊂ ~
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32 (U ∩ -: ÷ )C ⊃ ~
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33 )U ∪ (_ ⊆ >= ≥ ~
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34 ?= ≅ )_ ⊇ =< ≤ ~
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35 (- ∈ ?= ≅ != ≠ ~
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36 -) ∋ ?- ≃ ~
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37
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38 The Greek alphabet is available with '*' followed by a similar Latin symbol:
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39 *p π ~
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40 *t τ ~
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41 *X × ~
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42
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43 Numbers, subscripts and superscripts are available with 's' and 'S':
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44 0s ₀ 0S ⁰ ~
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45 1s ₁ 1S ¹ ~
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46 2s ₂ 9S ⁹ ~
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47
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48 But some don't come defined by default. Those are digraph definitions you can
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49 add in your ~/.vimrc file. >
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50 exec 'digraph \\ ' .. char2nr('∖')
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51 exec 'digraph \< ' .. char2nr('≼')
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52 exec 'digraph \> ' .. char2nr('≽')
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53 exec 'digraph (L ' .. char2nr('⊈')
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54 exec 'digraph )L ' .. char2nr('⊉')
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55 exec 'digraph (/ ' .. char2nr('⊄')
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56 exec 'digraph )/ ' .. char2nr('⊅')
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57 exec 'digraph )/ ' .. char2nr('⊅')
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58 exec 'digraph U+ ' .. char2nr('⊎')
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59 exec 'digraph 0- ' .. char2nr('⊖')
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60 " Euler's constant
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61 exec 'digraph ne ' .. char2nr('𝑒')
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62 " Raku's atomic operations marker
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63 exec 'digraph @@ ' .. char2nr('⚛')
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64
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65 Alternatively, you can write Insert mode abbreviations that convert ASCII-
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66 based operators into their single-character Unicode equivalent. >
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67 iabbrev <buffer> !(<) ⊄
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68 iabbrev <buffer> !(<=) ⊈
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69 iabbrev <buffer> !(>) ⊅
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70 iabbrev <buffer> !(>=) ⊉
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71 iabbrev <buffer> !(cont) ∌
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72 iabbrev <buffer> !(elem) ∉
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73 iabbrev <buffer> != ≠
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74 iabbrev <buffer> (&) ∩
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75 iabbrev <buffer> (+) ⊎
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76 iabbrev <buffer> (-) ∖
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77 iabbrev <buffer> (.) ⊍
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78 iabbrev <buffer> (<) ⊂
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79 iabbrev <buffer> (<+) ≼
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80 iabbrev <buffer> (<=) ⊆
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81 iabbrev <buffer> (>) ⊃
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82 iabbrev <buffer> (>+) ≽
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83 iabbrev <buffer> (>=) ⊇
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84 iabbrev <buffer> (\|) ∪
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85 iabbrev <buffer> (^) ⊖
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86 iabbrev <buffer> (atomic) ⚛
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87 iabbrev <buffer> (cont) ∋
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88 iabbrev <buffer> (elem) ∈
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89 iabbrev <buffer> * ×
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90 iabbrev <buffer> **0 ⁰
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91 iabbrev <buffer> **1 ¹
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92 iabbrev <buffer> **2 ²
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93 iabbrev <buffer> **3 ³
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94 iabbrev <buffer> **4 ⁴
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95 iabbrev <buffer> **5 ⁵
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96 iabbrev <buffer> **6 ⁶
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97 iabbrev <buffer> **7 ⁷
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98 iabbrev <buffer> **8 ⁸
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99 iabbrev <buffer> **9 ⁹
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100 iabbrev <buffer> ... …
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101 iabbrev <buffer> / ÷
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102 iabbrev <buffer> << «
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103 iabbrev <buffer> <<[=]<< «=«
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104 iabbrev <buffer> <<[=]>> «=»
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105 iabbrev <buffer> <= ≤
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106 iabbrev <buffer> =~= ≅
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107 iabbrev <buffer> >= ≥
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108 iabbrev <buffer> >> »
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109 iabbrev <buffer> >>[=]<< »=«
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110 iabbrev <buffer> >>[=]>> »=»
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111 iabbrev <buffer> Inf ∞
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112 iabbrev <buffer> atomic-add-fetch ⚛+=
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113 iabbrev <buffer> atomic-assign ⚛=
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114 iabbrev <buffer> atomic-fetch ⚛
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115 iabbrev <buffer> atomic-dec-fetch --⚛
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116 iabbrev <buffer> atomic-fetch-dec ⚛--
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117 iabbrev <buffer> atomic-fetch-inc ⚛++
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118 iabbrev <buffer> atomic-inc-fetch ++⚛
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119 iabbrev <buffer> atomic-sub-fetch ⚛−=
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120 iabbrev <buffer> e 𝑒
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121 iabbrev <buffer> o ∘
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122 iabbrev <buffer> pi π
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123 iabbrev <buffer> set() ∅
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124 iabbrev <buffer> tau τ
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125 <
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126 vim:tw=78:ts=8:noet:ft=help:norl:
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