Warn user + show tooltips for syntax errors

TODO.md

@@ -1,7 +1,7 @@
 # The to-do list
 
- * Right now the highlighting styles used by `luainspect.vim` are the same as those used by the SciTE plug-in and they don't work well on dark backgrounds. As soon as I get around to picking some alternate colors I'll include those in the plug-in.
-
- * Bindings for other features of LuaInspect such as omni completion for in scope variables (including display of library function signatures).
-
- * Document the g:lua_inspect_path option.
+ * Copy highlighting colors for dark backgrounds from luainspect/scite.lua.
+ * OMNI completion for in scope variables (including display of library function signatures).
+ * Fix improvised hack by using new `luainspect.signatures.value_signatures` table.
+ * Highlighting and tooltips for wrong parameter counts.
+ * Document g:lua_inspect_path option.

luainspect.vim

@@ -1,8 +1,8 @@
 " Vim plug-in
 " Author: Peter Odding <peter@peterodding.com>
-" Last Change: August 11, 2010
+" Last Change: August 12, 2010
 " URL: http://peterodding.com/code/vim/lua-inspect/
-" Version: 0.3.3
+" Version: 0.3.4
 " License: MIT
 
 " Support for automatic update using the GLVS plug-in.
@@ -86,7 +86,11 @@ endfunction
 
 function! LuaInspectToolTip() " {{{2
   let text = s:run_lua_inspect('tooltip', 0, 1)
-  return type(text) == type('') ? text : ''
+  if exists('b:luainspect_syntax_error')
+    return b:luainspect_syntax_error
+  else
+    return type(text) == type('') ? text : ''
+  endif
 endfunction
 
 function! s:run_lua_inspect(action, toggle, enabled) " {{{2
@@ -107,12 +111,14 @@ function! s:run_lua_inspect(action, toggle, enabled) " {{{2
         let linenum = b:luainspect_output[1] + 0
         let colnum = b:luainspect_output[2] + 0
         let linenum2 = b:luainspect_output[3] + 0
-        " TODO Can we do something useful with this?!
-        " let message = b:luainspect_output[4]
+        let b:luainspect_syntax_error = b:luainspect_output[4]
         let error_cmd = 'syntax match luaInspectSyntaxError /\%%>%il\%%<%il.*/ containedin=ALLBUT,lua*Comment*'
         execute printf(error_cmd, linenum - 1, (linenum2 ? linenum2 : line('$')) + 1)
+        call xolox#warning("Syntax error around line %i: %s", linenum, b:luainspect_syntax_error)
         return
-      elseif response == 'highlight'
+      endif
+      unlet! b:luainspect_syntax_error
+      if response == 'highlight'
         call s:define_default_styles()
         call s:clear_previous_matches()
         call s:highlight_variables()

luainspect4vim.lua

@@ -3,7 +3,7 @@
  This module is part of the luainspect.vim plug-in for the Vim text editor.
 
  Author: Peter Odding <peter@peterodding.com>
- Last Change: August 11, 2010
+ Last Change: August 12, 2010
  URL: http://peterodding.com/code/vim/lua-inspect/
  License: MIT
 
@@ -235,7 +235,8 @@ return function(src)
     myprint(linenum)
     myprint(colnum)
     myprint(linenum2 or 0)
-    myprint(err or '')
+    -- Remove prefixed line number from error message because it's redundant.
+    myprint((err:gsub('^%d+:%s+', '')))
     return
   end
   -- Now parse the source code using metalua to build an abstract syntax tree.