A face is a name for a value, type or expression in Hoon. In the expression
foo is the face of the value
42. When that value is pinned to the subject like
=+ foo=42, subsequent expressions can reference
foo and it will be substituted with
42. Faces are part of Hoon's type system, and are replaced with tree addresses when compiled to Nock.
- Hoon school: Syntax lesson: This lesson discusses faces in more detail.