Parsing subtraction bug

[Dimitar Misev]

This fails

$ rasql -q 'select 2-1 from mr2 as c' --out string
Executing retrieval query...rasdaman error 300: Parsing error 300 in line 1, column 9: Unexpected name -1.

while this works

$ rasql -q 'select 2- 1 from mr2 as c' --out string
  Result element 1: 1

Both should work in the same way, it seems like when the '-' is exactly in front of the argument with no whitespace, it is wrongly considered as the unary minus sign.

[Veranika Liaukevich]

This minus is considered as a part of negative integer '-1' by Lex, so I think it would be better to move all 'unary minus' logic to Bison part.

[Peter Baumann]

before doing that let us have a chat to find out what this exactly entails.

[Veranika Liaukevich]

We can delegate unary minus operation to some other bison rule (e.g. intLitExp, which is now useless in the way it is), and then replace IntegerLit with intLitExp in other rules.

I have just checked it, at least systemtests passed without failure.