Currently, the Shunting Yard based parser works well for all valid expressions (except for implicit grouping). However, it also works for some invalid expressions. For instance, 3+!4 parses to 3!+4, when it shouldn't parse at all. This error isn't caught during parse time because the re-ordered tokens are still valid, and should probably be caught during shunting yard itself.
Currently, the Shunting Yard based parser works well for all valid expressions (except for implicit grouping). However, it also works for some invalid expressions. For instance,
3+!4parses to3!+4, when it shouldn't parse at all. This error isn't caught during parse time because the re-ordered tokens are still valid, and should probably be caught during shunting yard itself.