vim-patch:7.4.2236

Problem:    The 'langnoremap' option leads to double negatives.  And it does
            not work for the last character of a mapping.
Solution:   Add 'langremap' with the opposite value.  Keep 'langnoremap' for
            backwards compatibility.  Make it work for the last character of a
            mapping.  Make the test work.

920694c1b6

src/nvim/macros.h

@@ -94,7 +94,7 @@
   do { \
     if (*p_langmap \
         && (condition) \
-        && (!p_lnr || (p_lnr && typebuf_maplen() == 0)) \
+        && (p_lrm || (!p_lrm && KeyTyped)) \
         && !KeyStuffed \
         && (c) >= 0) \
     { \

src/nvim/option.c

@@ -3630,6 +3630,12 @@ static char *set_bool_option(const int opt_idx, char_u *const varp,
   } else if ((int *)varp == &p_force_off && p_force_off == true) {
     p_force_off = false;
     return (char *)e_unsupportedoption;
+  } else if ((int *)varp == &p_lrm) {
+    // 'langremap' -> !'langnoremap'
+    p_lnr = !p_lrm;
+  } else if ((int *)varp == &p_lnr) {
+    // 'langnoremap' -> !'langremap'
+    p_lrm = !p_lnr;
   // 'undofile'
   } else if ((int *)varp == &curbuf->b_p_udf || (int *)varp == &p_udf) {
     // Only take action when the option was set. When reset we do not

src/nvim/option_defs.h

@@ -476,8 +476,9 @@ EXTERN char_u   *p_isp;         // 'isprint'
 EXTERN int p_js;                // 'joinspaces'
 EXTERN char_u   *p_kp;          // 'keywordprg'
 EXTERN char_u   *p_km;          // 'keymodel'
-EXTERN char_u   *p_langmap;     // 'langmap'*/
-EXTERN int p_lnr;               // 'langnoremap'*/
+EXTERN char_u   *p_langmap;     // 'langmap'
+EXTERN int p_lnr;               // 'langnoremap'
+EXTERN int p_lrm;               // 'langremap'
 EXTERN char_u   *p_lm;          // 'langmenu'
 EXTERN char_u   *p_lispwords;   // 'lispwords'
 EXTERN long p_ls;               // 'laststatus'

src/nvim/options.lua

@@ -1346,6 +1346,12 @@ return {
       varname='p_lnr',
       defaults={if_true={vi=false, vim=true}}
     },
+    {
+      full_name='langremap', abbreviation='lrm',
+      type='bool', scope={'global'},
+      varname='p_lrm',
+      defaults={if_true={vi=true, vim=false}}
+    },
     {
       full_name='laststatus', abbreviation='ls',
       type='number', scope={'global'},

src/nvim/testdir/test_mapping.vim

@@ -35,29 +35,73 @@ func Test_map_ctrl_c_visual()
 endfunc
 
 func Test_map_langmap()
-  " langmap should not get remapped in insert mode
-  inoremap { FAIL_ilangmap
-  set langmap=+{ langnoremap
+  if !has('langmap')
+    return
+  endif
+
+  " check langmap applies in normal mode
+  set langmap=+- nolangremap
+  new
+  call setline(1, ['a', 'b', 'c'])
+  2
+  call assert_equal('b', getline('.'))
+  call feedkeys("+", "xt")
+  call assert_equal('a', getline('.'))
+
+  " check no remapping
+  map x +
+  2
+  call feedkeys("x", "xt")
+  call assert_equal('c', getline('.'))
+
+  " check with remapping
+  set langremap
+  2
+  call feedkeys("x", "xt")
+  call assert_equal('a', getline('.'))
+
+  unmap x
+  bwipe!
+
+  " 'langnoremap' follows 'langremap' and vise versa
+  set langremap
+  set langnoremap
+  call assert_equal(0, &langremap)
+  set langremap
+  call assert_equal(0, &langnoremap)
+  set nolangremap
+  call assert_equal(1, &langnoremap)
+
+  " langmap should not apply in insert mode, 'langremap' doesn't matter
+  set langmap=+{ nolangremap
+  call feedkeys("Go+\<Esc>", "xt")
+  call assert_equal('+', getline('$'))
+  set langmap=+{ langremap
   call feedkeys("Go+\<Esc>", "xt")
   call assert_equal('+', getline('$'))
 
-  " Insert-mode expr mapping with langmap
-  inoremap <expr> { "FAIL_iexplangmap"
-  call feedkeys("Go+\<Esc>", "xt")
-  call assert_equal('+', getline('$'))
-  iunmap <expr> {
-
-  " langmap should not get remapped in Command-line mode
-  cnoremap { FAIL_clangmap
+  " langmap used for register name in insert mode.
+  call setreg('a', 'aaaa')
+  call setreg('b', 'bbbb')
+  call setreg('c', 'cccc')
+  set langmap=ab langremap
+  call feedkeys("Go\<C-R>a\<Esc>", "xt")
+  call assert_equal('bbbb', getline('$'))
+  call feedkeys("Go\<C-R>\<C-R>a\<Esc>", "xt")
+  call assert_equal('bbbb', getline('$'))
+  " mapping does not apply
+  imap c a
+  call feedkeys("Go\<C-R>c\<Esc>", "xt")
+  call assert_equal('cccc', getline('$'))
+  imap a c
+  call feedkeys("Go\<C-R>a\<Esc>", "xt")
+  call assert_equal('bbbb', getline('$'))
+ 
+  " langmap should not apply in Command-line mode
+  set langmap=+{ nolangremap
   call feedkeys(":call append(line('$'), '+')\<CR>", "xt")
   call assert_equal('+', getline('$'))
-  cunmap {
 
-  " Command-line mode expr mapping with langmap
-  cnoremap <expr> { "FAIL_cexplangmap"
-  call feedkeys(":call append(line('$'), '+')\<CR>", "xt")
-  call assert_equal('+', getline('$'))
-  cunmap {
   set nomodified
 endfunc
 

src/nvim/version.c

@@ -205,7 +205,7 @@ static const int included_patches[] = {
   // 2239,
   // 2238 NA
   2237,
-  // 2236,
+  2236,
   2235,
   // 2234 NA
   2233,