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patch 8.2.2318: Vim9: string and list index work differently

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Problem:    Vim9: string and list index work differently.
Solution:   Make string index work like list index. (closes #7643)
This commit is contained in:
Bram Moolenaar
2021-01-09 13:20:37 +01:00
parent 9e0f883f89
commit e7525c5520
7 changed files with 121 additions and 101 deletions
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21
src/testdir/test_vim9_expr.vim
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@@ -2304,7 +2304,7 @@ def Test_expr7_any_index_slice()
# string is permissive, index out of range accepted
g:teststring = 'abcdef'
assert_equal('b', g:teststring[1])
assert_equal('', g:teststring[-1])
assert_equal('f', g:teststring[-1])
assert_equal('', g:teststring[99])
assert_equal('b', g:teststring[1 : 1])
@@ -2368,10 +2368,10 @@ def Test_expr7_any_index_slice()
CheckDefExecFailure(['echo g:testblob[-3]'], 'E979:', 1)
CheckScriptFailure(['vim9script', 'echo g:testblob[-3]'], 'E979:', 2)
CheckDefExecFailure(['echo g:testlist[4]'], 'E684:', 1)
CheckDefExecFailure(['echo g:testlist[4]'], 'E684: list index out of range: 4', 1)
CheckScriptFailure(['vim9script', 'echo g:testlist[4]'], 'E684:', 2)
CheckDefExecFailure(['echo g:testlist[-5]'], 'E684:', 1)
CheckScriptFailure(['vim9script', 'echo g:testlist[-5]'], 'E684:', 2)
CheckScriptFailure(['vim9script', 'echo g:testlist[-5]'], 'E684: list index out of range: -5', 2)
CheckDefExecFailure(['echo g:testdict["a" : "b"]'], 'E719:', 1)
CheckScriptFailure(['vim9script', 'echo g:testdict["a" : "b"]'], 'E719:', 2)
@@ -2802,15 +2802,23 @@ enddef
def Test_expr7_string_subscript()
var lines =<< trim END
var text = 'abcdef'
assert_equal('', text[-1])
assert_equal('f', text[-1])
assert_equal('a', text[0])
assert_equal('e', text[4])
assert_equal('f', text[5])
assert_equal('', text[6])
text = 'ábçdë'
assert_equal('ë', text[-1])
assert_equal('d', text[-2])
assert_equal('ç', text[-3])
assert_equal('b', text[-4])
assert_equal('á', text[-5])
assert_equal('', text[-6])
text = 'ábçdëf'
assert_equal('', text[-999])
assert_equal('', text[-1])
assert_equal('f', text[-1])
assert_equal('á', text[0])
assert_equal('b', text[1])
assert_equal('ç', text[2])
@@ -2904,8 +2912,7 @@ def Test_expr7_list_subscript()
assert_equal([], list[0 : -6])
assert_equal([], list[0 : -99])
END
CheckDefSuccess(lines)
CheckScriptSuccess(['vim9script'] + lines)
CheckDefAndScriptSuccess(lines)
lines = ['var l = [0, 1, 2]', 'echo l[g:astring : g:theone]']
CheckDefExecFailure(lines, 'E1012:')