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patch 8.2.4530: making comparison with null work changes legacy behavior

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Problem:    Making comparison with null work changes legacy behavior.
Solution:   Only use the better comparison in Vim9 script. (closes #9910)
This commit is contained in:
Bram Moolenaar
2022-03-09 11:56:21 +00:00
parent 1588bc8ebe
commit f3507a517c
3 changed files with 38 additions and 1 deletions
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32
src/testdir/test_expr.vim
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@@ -181,6 +181,38 @@ func Test_loop_over_null_list()
call v9.CheckScriptFailure(lines, 'E121: Undefined variable: null_list')
endfunc
func Test_compare_with_null()
let s:value = v:null
call assert_true(s:value == v:null)
let s:value = v:true
call assert_false(s:value == v:null)
let s:value = v:none
call assert_false(s:value == v:null)
let s:value = 0
call assert_true(s:value == v:null)
if has('float')
let s:value = 0.0
call assert_true(s:value == v:null)
endif
let s:value = ''
call assert_false(s:value == v:null)
let s:value = 0z
call assert_false(s:value == v:null)
let s:value = []
call assert_false(s:value == v:null)
let s:value = {}
call assert_false(s:value == v:null)
let s:value = function('len')
call assert_false(s:value == v:null)
if has('job')
let s:value = test_null_job()
call assert_true(s:value == v:null)
let s:value = test_null_channel()
call assert_true(s:value == v:null)
endif
unlet s:value
endfunc
func Test_setreg_null_list()
let lines =<< trim END
call setreg('x', test_null_list())