22.3 Mapping for Identifiers

Slice identifiers map to an identical Ruby identifier. For example, the Slice identifier Clock becomes the Ruby identifier Clock. There are two exceptions to this rule:

1. If a Slice identifier maps to the name of a Ruby class, module, or constant, and the Slice identifier does not begin with an upper case letter, the mapping replaces the leading character with its upper case equivalent.¹ For example, the Slice identifier bankAccount is mapped as BankAccount.

2. If a Slice identifier is the same as a Ruby keyword, the corresponding Ruby identifier is prefixed with an underscore. For example, the Slice identifier while is mapped as _while.²

---

1

Ruby requires the names of classes, modules, and constants to begin with an upper case letter.

2

As suggested in Section 4.5.3 on page 88, you should try to avoid such identifiers as much as possible.