SourcePos module
Remove Unapplicable error type.
Combinator Monad
Remove Error dependency
Merge error with alternatives
Typo
Deriving show for debugging
Use Combinator
Now reports the source position. Use combinators
SourcePos optional in Error. Remove EmptyC in Combinator
Combinators -> Either et vice-versa
Combinators <-> Either
Use of combinators instead of either
VEnv show
Add sBindings
Add macro
Unittest. Half OK, half KO
Bug fix in conversion from Parsec SourcePos
Better error Show instance
+ and - allowed as symbol