Better error

Better Error Handling in CFEngine Proposal

1. Collect Data
   • Error Line & Column
   • Error Token
   • What kind of Error? Symbol, Constraint, or Attribute
2. Collect More Data
   • Use a special lexer that tokenizes newlines and common bad punctuation
   • Collect available tokens in each block type/body or bundle type
3. Figure out what the root problem could be
   • Use a special parser to look for problematic token pattern sequences
   • Look for problems in forgetting to use approperate delimiters (with those newlines and indentation)
   • Look for known bugs
4. Advice Accurately, what the problem is and how it could be fixed, or where more information could be found.
   • Show file, line, etc.
   • Highlight problem
   • Use edit distance to show possible matches (with excerpt of what it does)