Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
This is output of erlang shell:
1> atom.
atom
2> next_atom.
next_atom
3> atom@erlang.
atom@erlang
4> 'atom in single quotes'.
'atom in single quotes'
5> atom = 'atom'.
atom
6> a.tom.
'a.tom'
7> a..tom.
* 1: syntax error before: '..'
When there is just one dot . within atom (line 6), I get no errors. However, when there is .., I get syntax error. Does .. have some special meaning in Erlang or why do I get error when . works fine?
Dots are not allowed as such in atoms, but a dot between two atoms:
'foo'.'bar',is a compile time operator that concatenates the atoms to
'foo.bar'.This is an extension which was made to support the (still not officially
supported) Java-like package system. That’s why it’s not documented.