Hi Bram and list,
Document says:
'smartindent' 'si' 'nosmartindent' 'nosi'
'smartindent' 'si' boolean (default off)
[...]
When 'cindent' is on or 'indentexpr' is set,
setting 'si' has no effect.
[...]
But, Actually, When 'indentexpr' is set, setting 'si' *has* effect.
I wrote a patch and test.
(Look at the test_smartindent.vim of the attached patch for the reproduction
method)
--
Best regards,
Hirohito Higashi (h_east)
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diff --git a/src/misc1.c b/src/misc1.c
index 4f33015..f19c2dc 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -627,6 +627,9 @@ open_line(
# ifdef FEAT_CINDENT
&& !curbuf->b_p_cin
# endif
+# ifdef FEAT_EVAL
+ && *curbuf->b_p_inde == NUL
+# endif
);
int no_si = FALSE; /* reset did_si afterwards */
int first_char = NUL; /* init for GCC */
diff --git a/src/testdir/test_smartindent.vim b/src/testdir/test_smartindent.vim
index d00eac9..20a111e 100644
--- a/src/testdir/test_smartindent.vim
+++ b/src/testdir/test_smartindent.vim
@@ -1,3 +1,4 @@
+" Test for smartindent
" Tests for not doing smart indenting when it isn't set.
function! Test_nosmartindent()
@@ -12,3 +13,29 @@ function! Test_nosmartindent()
call assert_equal(" #test", getline(1))
enew! | close
endfunction
+
+function MyIndent()
+endfunction
+
+" When 'indentexpr' is set, setting 'si' has no effect.
+function Test_smartindent_has_no_effect()
+ new
+ exe "normal! i\<Tab>one\<Esc>"
+ set noautoindent
+ set smartindent
+ set indentexpr=
+ exe "normal! Gotwo\<Esc>"
+ call assert_equal("\ttwo", getline("$"))
+
+ set indentexpr=MyIndent
+ exe "normal! Gothree\<Esc>"
+ call assert_equal("three", getline("$"))
+
+ delfunction! MyIndent
+ set autoindent&
+ set smartindent&
+ set indentexpr&
+ bwipe!
+endfunction
+
+" vim: shiftwidth=2 sts=2 expandtab
