Do we need aliases, or are pure parameterless functions good enough?

[kbirken]

If pure paramless functions do not cost any gas, aliases are syntactic sugar. Benefits of aliases:

• as RHS is a literal, it is ensured that no gas cost is involved
• the usage of aliases doesn't look like a function call

Is there any difference between aliases and Solidity's constant variables?

If not, we close this ticket and use constant vars instead.