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annotate src/testdir/test_lambda.vim @ 19490:ac68906da0ae

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Added tag v8.2.0302 for changeset 31ac050a29a7dec656bfce3f6529502a84f626d8
author Bram Moolenaar <Bram@vim.org>
date Sat, 22 Feb 2020 23:00:05 +0100
parents 2a017e9dc6da
children b3e93a05c3ca
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1 " Test for lambda and closure
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2
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3 func Test_lambda_feature()
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4 call assert_equal(1, has('lambda'))
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5 endfunc
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6
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7 func Test_lambda_with_filter()
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8 let s:x = 2
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9 call assert_equal([2, 3], filter([1, 2, 3], {i, v -> v >= s:x}))
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10 endfunc
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11
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12 func Test_lambda_with_map()
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13 let s:x = 1
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14 call assert_equal([2, 3, 4], map([1, 2, 3], {i, v -> v + s:x}))
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15 endfunc
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16
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17 func Test_lambda_with_sort()
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18 call assert_equal([1, 2, 3, 4, 7], sort([3,7,2,1,4], {a, b -> a - b}))
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19 endfunc
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20
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21 func Test_lambda_with_timer()
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22 if !has('timers')
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23 return
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24 endif
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26 let s:n = 0
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27 let s:timer_id = 0
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28 func! s:Foo()
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29 let s:timer_id = timer_start(10, {-> execute("let s:n += 1 | echo s:n", "")}, {"repeat": -1})
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30 endfunc
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32 call s:Foo()
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33 " check timer works
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34 for i in range(0, 10)
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35 if s:n > 0
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36 break
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37 endif
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38 sleep 10m
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39 endfor
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40
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41 " do not collect lambda
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42 call test_garbagecollect_now()
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43
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44 " check timer still works
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45 let m = s:n
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46 for i in range(0, 10)
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47 if s:n > m
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48 break
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49 endif
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50 sleep 10m
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51 endfor
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52
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53 call timer_stop(s:timer_id)
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54 call assert_true(s:n > m)
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55 endfunc
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56
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57 func Test_lambda_with_partial()
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58 let l:Cb = function({... -> ['zero', a:1, a:2, a:3]}, ['one', 'two'])
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59 call assert_equal(['zero', 'one', 'two', 'three'], l:Cb('three'))
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60 endfunc
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61
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62 function Test_lambda_fails()
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63 call assert_equal(3, {a, b -> a + b}(1, 2))
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64 call assert_fails('echo {a, a -> a + a}(1, 2)', 'E853:')
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65 call assert_fails('echo {a, b -> a + b)}(1, 2)', 'E15:')
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66 endfunc
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67
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68 func Test_not_lamda()
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69 let x = {'>' : 'foo'}
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70 call assert_equal('foo', x['>'])
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71 endfunc
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72
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73 func Test_lambda_capture_by_reference()
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74 let v = 1
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75 let l:F = {x -> x + v}
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76 let v = 2
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77 call assert_equal(12, l:F(10))
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78 endfunc
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79
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80 func Test_lambda_side_effect()
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81 func! s:update_and_return(arr)
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82 let a:arr[1] = 5
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83 return a:arr
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84 endfunc
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85
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86 func! s:foo(arr)
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87 return {-> s:update_and_return(a:arr)}
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88 endfunc
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89
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90 let arr = [3,2,1]
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91 call assert_equal([3, 5, 1], s:foo(arr)())
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92 endfunc
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93
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94 func Test_lambda_refer_local_variable_from_other_scope()
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95 func! s:foo(X)
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96 return a:X() " refer l:x in s:bar()
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97 endfunc
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98
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99 func! s:bar()
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100 let x = 123
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101 return s:foo({-> x})
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102 endfunc
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103
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104 call assert_equal(123, s:bar())
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105 endfunc
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106
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107 func Test_lambda_do_not_share_local_variable()
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108 func! s:define_funcs()
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109 let l:One = {-> split(execute("let a = 'abc' | echo a"))[0]}
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110 let l:Two = {-> exists("a") ? a : "no"}
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111 return [l:One, l:Two]
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112 endfunc
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113
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114 let l:F = s:define_funcs()
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115
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116 call assert_equal('no', l:F[1]())
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117 call assert_equal('abc', l:F[0]())
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118 call assert_equal('no', l:F[1]())
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119 endfunc
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120
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121 func Test_lambda_closure_counter()
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122 func! s:foo()
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123 let x = 0
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124 return {-> [execute("let x += 1"), x][-1]}
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125 endfunc
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126
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127 let l:F = s:foo()
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128 call test_garbagecollect_now()
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129 call assert_equal(1, l:F())
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130 call assert_equal(2, l:F())
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131 call assert_equal(3, l:F())
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132 call assert_equal(4, l:F())
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133 endfunc
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134
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135 func Test_lambda_with_a_var()
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136 func! s:foo()
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137 let x = 2
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138 return {... -> a:000 + [x]}
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139 endfunc
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140 func! s:bar()
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141 return s:foo()(1)
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142 endfunc
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143
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144 call assert_equal([1, 2], s:bar())
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145 endfunc
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146
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147 func Test_lambda_call_lambda_from_lambda()
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148 func! s:foo(x)
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149 let l:F1 = {-> {-> a:x}}
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150 return {-> l:F1()}
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151 endfunc
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152
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153 let l:F = s:foo(1)
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154 call assert_equal(1, l:F()())
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155 endfunc
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156
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157 func Test_lambda_delfunc()
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158 func! s:gen()
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159 let pl = l:
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160 let l:Foo = {-> get(pl, "Foo", get(pl, "Bar", {-> 0}))}
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161 let l:Bar = l:Foo
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162 delfunction l:Foo
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163 return l:Bar
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164 endfunc
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165
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166 let l:F = s:gen()
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167 call assert_fails(':call l:F()', 'E933:')
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168 endfunc
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169
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170 func Test_lambda_scope()
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171 func! s:NewCounter()
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172 let c = 0
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173 return {-> [execute('let c += 1'), c][-1]}
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174 endfunc
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175
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176 func! s:NewCounter2()
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177 return {-> [execute('let c += 100'), c][-1]}
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178 endfunc
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179
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180 let l:C = s:NewCounter()
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181 let l:D = s:NewCounter2()
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182
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183 call assert_equal(1, l:C())
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184 call assert_fails(':call l:D()', 'E121:')
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185 call assert_equal(2, l:C())
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186 endfunc
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187
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188 func Test_lambda_share_scope()
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189 func! s:New()
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190 let c = 0
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191 let l:Inc0 = {-> [execute('let c += 1'), c][-1]}
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192 let l:Dec0 = {-> [execute('let c -= 1'), c][-1]}
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193 return [l:Inc0, l:Dec0]
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194 endfunc
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195
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196 let [l:Inc, l:Dec] = s:New()
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197
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198 call assert_equal(1, l:Inc())
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199 call assert_equal(2, l:Inc())
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200 call assert_equal(1, l:Dec())
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201 endfunc
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202
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203 func Test_lambda_circular_reference()
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204 func! s:Foo()
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205 let d = {}
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206 let d.f = {-> d}
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207 return d.f
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208 endfunc
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209
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210 call s:Foo()
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211 call test_garbagecollect_now()
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212 let i = 0 | while i < 10000 | call s:Foo() | let i+= 1 | endwhile
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213 call test_garbagecollect_now()
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214 endfunc
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215
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216 func Test_lambda_combination()
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217 call assert_equal(2, {x -> {x -> x}}(1)(2))
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218 call assert_equal(10, {y -> {x -> x(y)(10)}({y -> y})}({z -> z}))
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219 if has('float')
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220 call assert_equal(5.0, {x -> {y -> x / y}}(10)(2.0))
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221 endif
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222 call assert_equal(6, {x -> {y -> {z -> x + y + z}}}(1)(2)(3))
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223
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224 call assert_equal(6, {x -> {f -> f(x)}}(3)({x -> x * 2}))
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225 call assert_equal(6, {f -> {x -> f(x)}}({x -> x * 2})(3))
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226
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227 " Z combinator
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228 let Z = {f -> {x -> f({y -> x(x)(y)})}({x -> f({y -> x(x)(y)})})}
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229 let Fact = {f -> {x -> x == 0 ? 1 : x * f(x - 1)}}
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230 call assert_equal(120, Z(Fact)(5))
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231 endfunc
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232
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233 func Test_closure_counter()
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234 func! s:foo()
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235 let x = 0
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236 func! s:bar() closure
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237 let x += 1
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238 return x
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239 endfunc
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240 return function('s:bar')
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241 endfunc
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242
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243 let l:F = s:foo()
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244 call test_garbagecollect_now()
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245 call assert_equal(1, l:F())
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246 call assert_equal(2, l:F())
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247 call assert_equal(3, l:F())
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248 call assert_equal(4, l:F())
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249 endfunc
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250
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251 func Test_closure_unlet()
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252 func! s:foo()
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253 let x = 1
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254 func! s:bar() closure
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255 unlet x
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256 endfunc
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257 call s:bar()
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258 return l:
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259 endfunc
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260
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261 call assert_false(has_key(s:foo(), 'x'))
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262 call test_garbagecollect_now()
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263 endfunc
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264
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265 func LambdaFoo()
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266 let x = 0
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267 func! LambdaBar() closure
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268 let x += 1
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269 return x
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270 endfunc
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271 return function('LambdaBar')
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272 endfunc
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273
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274 func Test_closure_refcount()
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275 let g:Count = LambdaFoo()
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276 call test_garbagecollect_now()
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277 call assert_equal(1, g:Count())
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278 let g:Count2 = LambdaFoo()
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279 call test_garbagecollect_now()
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280 call assert_equal(1, g:Count2())
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281 call assert_equal(2, g:Count())
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282 call assert_equal(3, g:Count2())
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283
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284 delfunc LambdaFoo
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285 delfunc LambdaBar
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286 endfunc
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287
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288 func Test_named_function_closure()
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289 func! Afoo()
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290 let x = 14
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291 func! s:Abar() closure
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292 return x
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293 endfunc
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294 call assert_equal(14, s:Abar())
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295 endfunc
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296 call Afoo()
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297 call assert_equal(14, s:Abar())
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298 call test_garbagecollect_now()
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299 call assert_equal(14, s:Abar())
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300 endfunc
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301
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302 func Test_lambda_with_index()
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303 let List = {x -> [x]}
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304 let Extract = {-> function(List, ['foobar'])()[0]}
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305 call assert_equal('foobar', Extract())
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306 endfunc
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307
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308 func Test_lambda_error()
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309 " This was causing a crash
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310 call assert_fails('ec{@{->{d->()()', 'E15')
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311 endfunc