patch 8.2.2658: :for cannot loop over a string
Problem: :for cannot loop over a string.
Solution: Accept a string argument and iterate over its characters.
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index b9c1c57..1169c86 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -2322,6 +2322,25 @@
res ..= n .. s
endfor
assert_equal('1a2b', res)
+
+ # loop over string
+ res = ''
+ for c in 'aéc̀d'
+ res ..= c .. '-'
+ endfor
+ assert_equal('a-é-c̀-d-', res)
+
+ res = ''
+ for c in ''
+ res ..= c .. '-'
+ endfor
+ assert_equal('', res)
+
+ res = ''
+ for c in test_null_string()
+ res ..= c .. '-'
+ endfor
+ assert_equal('', res)
enddef
def Test_for_loop_fails()
@@ -2333,10 +2352,17 @@
CheckDefFailure(['var x = 5', 'for x in range(5)'], 'E1017:')
CheckScriptFailure(['def Func(arg: any)', 'for arg in range(5)', 'enddef', 'defcompile'], 'E1006:')
delfunc! g:Func
- CheckDefFailure(['for i in "text"'], 'E1012:')
CheckDefFailure(['for i in xxx'], 'E1001:')
CheckDefFailure(['endfor'], 'E588:')
CheckDefFailure(['for i in range(3)', 'echo 3'], 'E170:')
+
+ # wrong type detected at compile time
+ CheckDefFailure(['for i in {a: 1}', 'echo 3', 'endfor'], 'E1177: For loop on dict not supported')
+
+ # wrong type detected at runtime
+ g:adict = {a: 1}
+ CheckDefExecFailure(['for i in g:adict', 'echo 3', 'endfor'], 'E1177: For loop on dict not supported')
+ unlet g:adict
enddef
def Test_for_loop_script_var()