patch 9.0.1906: Vim9: Interfaces should not support class methods and variables Commit: https://github.com/vim/vim/commit/92d9ee5f4ca0d2de04c39afbafc7609da43fb2e9 Author: Yegappan Lakshmanan <yegappan@yahoo.com> Date: Sun Sep 17 17:03:19 2023 +0200 patch 9.0.1906: Vim9: Interfaces should not support class methods and variables Problem: Vim9: Interfaces should not support class methods and variables Solution: Make sure interface follow the interface specification Vim9 interface changes to follow the new interface specification: 1) An interface can have only read-only and read-write instance variables. 2) An interface can have only public instance methods. 3) An interface cannot have class variables and class methods. 4) An interface cannot have private instance variables and private instance methods. 5) A interface can extend another interface using "extends". The sub-interface gets all the variables and methods in the super interface. That means: - Interfaces should not support class methods and variables. - Adjust error numbers and add additional tests. - Interface methods can be defined in one of the super classes. - Interface variables can be defined in one of the super classes. and instance variables can be repeated in sub interfaces. - Check the class variable types with the type in interface. closes: #13100 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>

vim9script noclear

# Vim support file to switch on loading plugins for file types
#
# Maintainer:	The Vim Project <https://github.com/vim/vim>
# Last change:	2023 Aug 10
# Former Maintainer:	Bram Moolenaar <Bram@vim.org>

if exists("g:did_load_ftplugin")
  finish
endif
g:did_load_ftplugin = 1

augroup filetypeplugin
  au FileType * call LoadFTPlugin()
augroup END

if exists('*LoadFTPlugin')
  # No need to define the function again.
  finish
endif

def LoadFTPlugin()
  if exists("b:undo_ftplugin")
    # We assume b:undo_ftplugin is using legacy script syntax
    legacy exe b:undo_ftplugin
    unlet! b:undo_ftplugin b:did_ftplugin
  endif

  var s = expand("<amatch>")
  if s != ""
    if &cpo =~# "S" && exists("b:did_ftplugin")
      # In compatible mode options are reset to the global values, need to
      # set the local values also when a plugin was already used.
      unlet b:did_ftplugin
    endif

    # When there is a dot it is used to separate filetype names.  Thus for
    # "aaa.bbb" load "aaa" and then "bbb".
    for name in split(s, '\.')
      exe 'runtime! ftplugin/' .. name .. '.vim ftplugin/' .. name .. '_*.vim ftplugin/' .. name .. '/*.vim'
    endfor
  endif
enddef