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patch 8.2.4634: Vim9: cannot initialize a variable to null_list

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Problem:    Vim9: cannot initialize a variable to null_list.
Solution:   Give negative count to NEWLIST. (closes #10027)
            Also fix inconsistencies in comparing with null values.
This commit is contained in:
Bram Moolenaar
2022-03-27 16:29:53 +01:00
parent c75bca3ee9
commit ec15b1cfdc
12 changed files with 179 additions and 84 deletions
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48
src/testdir/test_vim9_expr.vim
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@@ -754,6 +754,12 @@ def Test_expr4_compare_null()
assert_false(v:null != test_null_blob())
assert_false(null != null_blob)
var nb = null_blob
assert_true(nb == null_blob)
assert_true(nb == null)
assert_true(null_blob == nb)
assert_true(null == nb)
if has('channel')
assert_true(test_null_channel() == v:null)
assert_true(null_channel == null)
@@ -763,6 +769,12 @@ def Test_expr4_compare_null()
assert_false(null_channel != null)
assert_false(v:null != test_null_channel())
assert_false(null != null_channel)
var nc = null_channel
assert_true(nc == null_channel)
assert_true(nc == null)
assert_true(null_channel == nc)
assert_true(null == nc)
endif
assert_true(test_null_dict() == v:null)
@@ -779,6 +791,12 @@ def Test_expr4_compare_null()
assert_false(g:null_dict != v:null)
assert_false(v:null != g:null_dict)
var nd = null_dict
assert_true(nd == null_dict)
assert_true(nd == null)
assert_true(null_dict == nd)
assert_true(null == nd)
assert_true(test_null_function() == v:null)
assert_true(null_function == null)
assert_true(v:null == test_null_function())
@@ -788,6 +806,12 @@ def Test_expr4_compare_null()
assert_false(v:null != test_null_function())
assert_false(null != null_function)
var Nf = null_function
assert_true(Nf == null_function)
assert_true(Nf == null)
assert_true(null_function == Nf)
assert_true(null == Nf)
if has('job')
assert_true(test_null_job() == v:null)
assert_true(null_job == null)
@@ -797,6 +821,12 @@ def Test_expr4_compare_null()
assert_false(null_job != null)
assert_false(v:null != test_null_job())
assert_false(null != null_job)
var nj = null_job
assert_true(nj == null_job)
assert_true(nj == null)
assert_true(null_job == nj)
assert_true(null == nj)
endif
assert_true(test_null_list() == v:null)
@@ -813,6 +843,12 @@ def Test_expr4_compare_null()
assert_true(g:not_null_list != v:null)
assert_true(v:null != g:not_null_list)
var nl = null_list
assert_true(nl == null_list)
assert_true(nl == null)
assert_true(null_list == nl)
assert_true(null == nl)
assert_true(test_null_partial() == v:null)
assert_true(null_partial == null)
assert_true(v:null == test_null_partial())
@@ -822,6 +858,12 @@ def Test_expr4_compare_null()
assert_false(v:null != test_null_partial())
assert_false(null != null_partial)
var Np = null_partial
assert_true(Np == null_partial)
assert_true(Np == null)
assert_true(null_partial == Np)
assert_true(null == Np)
assert_true(test_null_string() == v:null)
assert_true(null_string == null)
assert_true(v:null == test_null_string())
@@ -837,6 +879,12 @@ def Test_expr4_compare_null()
assert_false(null_string isnot test_null_string())
assert_true(null_string isnot '')
assert_true('' isnot null_string)
var ns = null_string
assert_true(ns == null_string)
assert_true(ns == null)
assert_true(null_string == ns)
assert_true(null == ns)
END
v9.CheckDefAndScriptSuccess(lines)
unlet g:null_dict