vim-patch:9.1.0013: Modula2 filetype support lacking (#27020)

Problem:  Modula2 filetype support lacking
Solution: Improve the Modula-2 runtime support, add additional modula2
          dialects, add compiler plugin, update syntax highlighting,
          include syntax tests, update Makefiles (Doug Kearns)

closes: vim/vim#6796
closes: vim/vim#8115

https://github.com/vim/vim/commit/68a89470693c7687d4e736ca056c05de632e3ac7

- Luaify the detection script:

  - Split the `(*!m2foo*)` and `(*!m2foo+bar*)` detection into two Lua patterns,
    as Lua capture groups cannot be used with `?` and friends (as they only work
    on character classes).

  - Use `vim.api.nvim_buf_call()` (ew) to call `modula2#SetDialect()` to ensure
    `b:modula2` is set for the given bufnr.

- Skip the syntax screendump tests. (A shame as they test some of the detection
  from `(*!m2foo+bar*)` tags, but I tested this locally and it seems to work)

- Port the synmenu.vim changes from Vim9 script. (Also tested this locally)

- (And also add the missing comma for `b:browsefilter` from earlier.)

Co-authored-by: Doug Kearns <dougkearns@gmail.com>

1 files changed, 37 insertions, 1 deletions

diff --git a/test/old/testdir/test_filetype.vim b/test/old/testdir/test_filetype.vim
index 9f493bb792..50e60de484 100644
--- a/test/old/testdir/test_filetype.vim
+++ b/test/old/testdir/test_filetype.vim
@@ -424,7 +424,6 @@ func s:GetFilenameChecks() abort
     \ 'mma': ['file.nb'],
     \ 'mmp': ['file.mmp'],
     \ 'modconf': ['/etc/modules.conf', '/etc/modules', '/etc/conf.modules', '/etc/modprobe.file', 'any/etc/conf.modules', 'any/etc/modprobe.file', 'any/etc/modules', 'any/etc/modules.conf'],
-    \ 'modula2': ['file.m2', 'file.mi'],
     \ 'modula3': ['file.m3', 'file.mg', 'file.i3', 'file.ig', 'file.lm3'],
     \ 'monk': ['file.isc', 'file.monk', 'file.ssc', 'file.tsc'],
     \ 'moo': ['file.moo'],
@@ -1550,13 +1549,16 @@ func Test_mod_file()
   call writefile(['IMPLEMENTATION MODULE Module2Mod;'], 'modfile.MOD')
   split modfile.MOD
   call assert_equal('modula2', &filetype)
+  call assert_equal('pim', b:modula2.dialect)
   bwipe!
 
   " Modula-2 with comment and empty lines prior MODULE
   call writefile(['', '(* with',  ' comment *)', '', 'MODULE Module2Mod;'], 'modfile.MOD')
   split modfile.MOD
   call assert_equal('modula2', &filetype)
+  call assert_equal('pim', b:modula2.dialect)
   bwipe!
+
   call delete('modfile.MOD')
 
   " LambdaProlog module
@@ -2284,4 +2286,38 @@ func Test_i_file()
   filetype off
 endfunc
 
+func Test_def_file()
+  filetype on
+
+  call writefile(['this is the fallback'], 'Xfile.def', 'D')
+  split Xfile.def
+  call assert_equal('def', &filetype)
+  bwipe!
+
+  " Test dist#ft#FTdef()
+
+  let g:filetype_def = 'modula2'
+  split Xfile.def
+  call assert_equal('modula2', &filetype)
+  call assert_equal('pim', b:modula2.dialect)
+  bwipe!
+  unlet g:filetype_def
+
+  " Modula-2
+
+  call writefile(['(* a Modula-2 comment *)'], 'Xfile.def')
+  split Xfile.def
+  call assert_equal('modula2', &filetype)
+  call assert_equal('pim', b:modula2.dialect)
+  bwipe!
+
+  call writefile(['IMPLEMENTATION MODULE Module2Mod;'], 'Xfile.def')
+  split Xfile.def
+  call assert_equal('modula2', &filetype)
+  call assert_equal('pim', b:modula2.dialect)
+  bwipe!
+
+  filetype off
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab