Add DebugStringFunExpr methods for Python, R

Author: bergercookie

README.md

@@ -46,6 +46,7 @@ Currently the following languages are supported:
   + Javascript
   + PHP
   + Python
+  + R
   + Ruby
   + Shell
   + Vim
@@ -137,3 +138,5 @@ vim.org](https://vim.sourceforge.io/scripts/script.php?script_id=5634)
 - [ ] Use travis for CI
 - [x] Bug with changing the filename of the current file
 - [ ] Make vim-repeat dependency optional
+- [ ] Turn supported languages into a table - what do we support in which
+    language?

ftplugin/common/py_like.vim

@@ -1,9 +1,9 @@
-let g:path = fnamemodify(resolve(expand('<sfile>:p')), ':h')
-
-function! s:DebugStringFun()
-    execute 'source ' . g:path . '/common/py_like.vim'
-    return DebugStringFunPython()
+function! s:DebugStringFunBase(desc, var)
+    let l:debug_str = 'print("' . a:desc . '", ' . a:var . ')'
+    return l:debug_str
 endfunc
 
-command! -buffer -nargs=0 AddDebugString put=s:DebugStringFun()
-
+command! -buffer -nargs=0 AddDebugString
+            \ put=s:DebugStringFunBase(g:DebugstringPrefixStr(), g:debugStringCounter)
+command! -buffer -nargs=1 AddDebugStringExpr
+            \ put=s:DebugStringFunBase(<args> . ': ', <args>)

ftplugin/python.vim

@@ -1,8 +1,9 @@
-let g:path = fnamemodify(resolve(expand('<sfile>:p')), ':h')
-
-function! s:DebugStringFun()
-    execute 'source ' . g:path . '/common/py_like.vim'
-    return DebugStringFunPython()
+function! s:DebugStringFunBase(desc, var)
+    let l:debug_str = 'message(sprintf("' . a:desc . '%s\n", ' . a:var . '))'
+    return l:debug_str
 endfunc
 
-command! -buffer -nargs=0 AddDebugString put=s:DebugStringFun()
+command! -buffer -nargs=0 AddDebugString
+            \ put=s:DebugStringFunBase(g:DebugstringPrefixStr(), g:debugStringCounter)
+command! -buffer -nargs=1 AddDebugStringExpr
+            \ put=s:DebugStringFunBase(<args> . ': ', <args>)