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annotate src/testdir/test_lambda.vim @ 29868:6ab2c61291ac

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Added tag v9.0.0272 for changeset 6eaef7375f17777ce6ba592ed21a22e04bf07d69
author Bram Moolenaar <Bram@vim.org>
date Fri, 26 Aug 2022 13:00:05 +0200
parents 67f005ab37d7
children 58fb880f3607
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 " Test for lambda and closure
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2
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3 source check.vim
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4 import './vim9.vim' as v9
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5
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6 func Test_lambda_feature()
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7 call assert_equal(1, has('lambda'))
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8 endfunc
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9
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10 func Test_lambda_with_filter()
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11 let s:x = 2
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12 call assert_equal([2, 3], filter([1, 2, 3], {i, v -> v >= s:x}))
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13 endfunc
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14
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15 func Test_lambda_with_map()
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16 let s:x = 1
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17 call assert_equal([2, 3, 4], map([1, 2, 3], {i, v -> v + s:x}))
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18 endfunc
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19
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20 func Test_lambda_with_sort()
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21 call assert_equal([1, 2, 3, 4, 7], sort([3,7,2,1,4], {a, b -> a - b}))
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22 endfunc
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23
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24 func Test_lambda_with_timer()
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25 CheckFeature timers
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27 let s:n = 0
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28 let s:timer_id = 0
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29 func! s:Foo()
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30 let s:timer_id = timer_start(10, {-> execute("let s:n += 1 | echo s:n", "")}, {"repeat": -1})
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31 endfunc
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33 call s:Foo()
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34 " check timer works
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35 for i in range(0, 10)
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36 if s:n > 0
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37 break
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38 endif
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39 sleep 10m
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40 endfor
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41
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42 " do not collect lambda
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43 call test_garbagecollect_now()
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44
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45 " check timer still works
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46 let m = s:n
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47 for i in range(0, 10)
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48 if s:n > m
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49 break
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50 endif
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51 sleep 10m
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52 endfor
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53
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54 call timer_stop(s:timer_id)
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55 call assert_true(s:n > m)
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56 endfunc
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57
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58 func Test_lambda_vim9cmd_linebreak()
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59 CheckFeature timers
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60
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61 let g:test_is_flaky = 1
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62 let lines =<< trim END
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63 vim9cmd call timer_start(10, (x) => {
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64 # comment
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65 g:result = 'done'
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66 })
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67 END
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68 call v9.CheckScriptSuccess(lines)
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69 " sleep longer on a retry
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70 exe 'sleep ' .. [20, 100, 500, 500, 500][g:run_nr] .. 'm'
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71 call assert_equal('done', g:result)
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72 unlet g:result
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73
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74 let lines =<< trim END
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75 g:result = [0]->map((_, v) =>
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76 1 # inline comment
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77 +
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78 2
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79 )
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80 assert_equal([3], g:result)
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81 END
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82 call v9.CheckDefAndScriptSuccess(lines)
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83 endfunc
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84
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85 func Test_lambda_with_partial()
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86 let l:Cb = function({... -> ['zero', a:1, a:2, a:3]}, ['one', 'two'])
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87 call assert_equal(['zero', 'one', 'two', 'three'], l:Cb('three'))
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88 endfunc
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89
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90 function Test_lambda_fails()
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91 call assert_equal(3, {a, b -> a + b}(1, 2))
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92 call assert_fails('echo {a, a -> a + a}(1, 2)', 'E853:')
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93 call assert_fails('echo {a, b -> a + b)}(1, 2)', 'E451:')
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94 echo assert_fails('echo 10->{a -> a + 2}', 'E107:')
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95
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96 call assert_fails('eval 0->(', "E110: Missing ')'")
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97 call assert_fails('eval 0->(3)()', "E1275:")
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98 call assert_fails('eval 0->([3])()', "E1275:")
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99 call assert_fails('eval 0->({"a": 3})()', "E1275:")
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100 call assert_fails('eval 0->(xxx)()', "E121:")
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101 endfunc
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102
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103 func Test_not_lamda()
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104 let x = {'>' : 'foo'}
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105 call assert_equal('foo', x['>'])
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106 endfunc
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107
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108 func Test_lambda_capture_by_reference()
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109 let v = 1
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110 let l:F = {x -> x + v}
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111 let v = 2
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112 call assert_equal(12, l:F(10))
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113 endfunc
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114
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115 func Test_lambda_side_effect()
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116 func! s:update_and_return(arr)
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117 let a:arr[1] = 5
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118 return a:arr
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119 endfunc
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120
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121 func! s:foo(arr)
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122 return {-> s:update_and_return(a:arr)}
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123 endfunc
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124
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125 let arr = [3,2,1]
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126 call assert_equal([3, 5, 1], s:foo(arr)())
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127 endfunc
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128
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129 func Test_lambda_refer_local_variable_from_other_scope()
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130 func! s:foo(X)
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131 return a:X() " refer l:x in s:bar()
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132 endfunc
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133
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134 func! s:bar()
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135 let x = 123
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136 return s:foo({-> x})
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137 endfunc
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139 call assert_equal(123, s:bar())
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140 endfunc
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141
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142 func Test_lambda_do_not_share_local_variable()
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143 func! s:define_funcs()
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144 let l:One = {-> split(execute("let a = 'abc' | echo a"))[0]}
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145 let l:Two = {-> exists("a") ? a : "no"}
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146 return [l:One, l:Two]
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147 endfunc
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148
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149 let l:F = s:define_funcs()
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150
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151 call assert_equal('no', l:F[1]())
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152 call assert_equal('abc', l:F[0]())
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153 call assert_equal('no', l:F[1]())
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154 endfunc
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155
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156 func Test_lambda_closure_counter()
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157 func! s:foo()
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158 let x = 0
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159 return {-> [execute("let x += 1"), x][-1]}
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160 endfunc
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161
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162 let l:F = s:foo()
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163 call test_garbagecollect_now()
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164 call assert_equal(1, l:F())
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165 call assert_equal(2, l:F())
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166 call assert_equal(3, l:F())
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167 call assert_equal(4, l:F())
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168 endfunc
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169
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170 func Test_lambda_with_a_var()
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171 func! s:foo()
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172 let x = 2
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173 return {... -> a:000 + [x]}
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174 endfunc
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175 func! s:bar()
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176 return s:foo()(1)
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177 endfunc
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178
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179 call assert_equal([1, 2], s:bar())
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180 endfunc
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181
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182 func Test_lambda_call_lambda_from_lambda()
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183 func! s:foo(x)
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184 let l:F1 = {-> {-> a:x}}
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185 return {-> l:F1()}
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186 endfunc
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187
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188 let l:F = s:foo(1)
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189 call assert_equal(1, l:F()())
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190 endfunc
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191
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192 func Test_lambda_delfunc()
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193 func! s:gen()
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194 let pl = l:
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195 let l:Foo = {-> get(pl, "Foo", get(pl, "Bar", {-> 0}))}
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196 let l:Bar = l:Foo
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197 delfunction l:Foo
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198 return l:Bar
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199 endfunc
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200
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201 let l:F = s:gen()
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202 call assert_fails(':call l:F()', 'E933:')
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203 endfunc
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204
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205 func Test_lambda_scope()
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206 func! s:NewCounter()
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207 let c = 0
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208 return {-> [execute('let c += 1'), c][-1]}
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209 endfunc
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210
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211 func! s:NewCounter2()
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212 return {-> [execute('let c += 100'), c][-1]}
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213 endfunc
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214
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215 let l:C = s:NewCounter()
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216 let l:D = s:NewCounter2()
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217
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218 call assert_equal(1, l:C())
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219 call assert_fails(':call l:D()', 'E121:')
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220 call assert_equal(2, l:C())
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221 endfunc
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222
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223 func Test_lambda_share_scope()
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224 func! s:New()
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225 let c = 0
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226 let l:Inc0 = {-> [execute('let c += 1'), c][-1]}
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227 let l:Dec0 = {-> [execute('let c -= 1'), c][-1]}
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228 return [l:Inc0, l:Dec0]
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229 endfunc
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230
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231 let [l:Inc, l:Dec] = s:New()
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232
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233 call assert_equal(1, l:Inc())
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234 call assert_equal(2, l:Inc())
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235 call assert_equal(1, l:Dec())
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236 endfunc
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237
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238 func Test_lambda_circular_reference()
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239 func! s:Foo()
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240 let d = {}
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241 let d.f = {-> d}
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242 return d.f
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243 endfunc
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244
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245 call s:Foo()
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246 call test_garbagecollect_now()
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247 let i = 0 | while i < 10000 | call s:Foo() | let i+= 1 | endwhile
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248 call test_garbagecollect_now()
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249 endfunc
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250
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251 func Test_lambda_combination()
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252 call assert_equal(2, {x -> {x -> x}}(1)(2))
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253 call assert_equal(10, {y -> {x -> x(y)(10)}({y -> y})}({z -> z}))
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254 if has('float')
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255 call assert_equal(5.0, {x -> {y -> x / y}}(10)(2.0))
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256 endif
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257 call assert_equal(6, {x -> {y -> {z -> x + y + z}}}(1)(2)(3))
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258
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259 call assert_equal(6, {x -> {f -> f(x)}}(3)({x -> x * 2}))
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260 call assert_equal(6, {f -> {x -> f(x)}}({x -> x * 2})(3))
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261
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262 " Z combinator
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263 let Z = {f -> {x -> f({y -> x(x)(y)})}({x -> f({y -> x(x)(y)})})}
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264 let Fact = {f -> {x -> x == 0 ? 1 : x * f(x - 1)}}
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265 call assert_equal(120, Z(Fact)(5))
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266 endfunc
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267
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268 func Test_closure_counter()
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269 func! s:foo()
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270 let x = 0
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271 func! s:bar() closure
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272 let x += 1
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273 return x
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274 endfunc
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275 return function('s:bar')
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276 endfunc
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277
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278 let l:F = s:foo()
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279 call test_garbagecollect_now()
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280 call assert_equal(1, l:F())
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281 call assert_equal(2, l:F())
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282 call assert_equal(3, l:F())
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283 call assert_equal(4, l:F())
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284
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285 call assert_match("^\n function <SNR>\\d\\+_bar() closure"
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286 \ .. "\n1 let x += 1"
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287 \ .. "\n2 return x"
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288 \ .. "\n endfunction$", execute('func s:bar'))
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289 endfunc
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290
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291 func Test_closure_unlet()
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292 func! s:foo()
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293 let x = 1
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294 func! s:bar() closure
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295 unlet x
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296 endfunc
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297 call s:bar()
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298 return l:
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299 endfunc
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300
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301 call assert_false(has_key(s:foo(), 'x'))
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302 call test_garbagecollect_now()
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303 endfunc
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304
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305 func LambdaFoo()
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306 let x = 0
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307 func! LambdaBar() closure
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308 let x += 1
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309 return x
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310 endfunc
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311 return function('LambdaBar')
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312 endfunc
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313
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314 func Test_closure_refcount()
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315 let g:Count = LambdaFoo()
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316 call test_garbagecollect_now()
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317 call assert_equal(1, g:Count())
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318 let g:Count2 = LambdaFoo()
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319 call test_garbagecollect_now()
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320 call assert_equal(1, g:Count2())
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321 call assert_equal(2, g:Count())
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322 call assert_equal(3, g:Count2())
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323
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324 delfunc LambdaFoo
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325 delfunc LambdaBar
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326 endfunc
9735
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327
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328 func Test_named_function_closure()
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329 func! Afoo()
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330 let x = 14
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331 func! s:Abar() closure
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332 return x
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333 endfunc
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334 call assert_equal(14, s:Abar())
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335 endfunc
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336 call Afoo()
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337 call assert_equal(14, s:Abar())
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338 call test_garbagecollect_now()
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339 call assert_equal(14, s:Abar())
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340 endfunc
14002
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341
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342 func Test_lambda_with_index()
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343 let List = {x -> [x]}
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344 let Extract = {-> function(List, ['foobar'])()[0]}
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345 call assert_equal('foobar', Extract())
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346 endfunc
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347
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348 func Test_lambda_error()
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349 " This was causing a crash
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350 call assert_fails('ec{@{->{d->()()', 'E15:')
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351 endfunc
19724
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352
19932
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353 func Test_closure_error()
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354 let l =<< trim END
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355 func F1() closure
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356 return 1
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357 endfunc
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358 END
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359 call writefile(l, 'Xscript')
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360 let caught_932 = 0
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361 try
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362 source Xscript
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363 catch /E932:/
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364 let caught_932 = 1
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365 endtry
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366 call assert_equal(1, caught_932)
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367 call delete('Xscript')
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368 endfunc
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369
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370 " vim: shiftwidth=2 sts=2 expandtab