The idea of looking at things as a call tree (or graph) rather than a plain old stack is how Schemers think about things. We specifically avoid terminology like

The idea of looking at things as a call tree (or graph) rather than a plain old stack is how Schemers think about things. We specifically avoid terminology like "stack frame" and refer to them as "continuation frames" because we don't tie the abstract feature to how it is implemented. A branch in the tree is an invocation of call/cc. These recent complaints about structured concurrency in popular languages to appear to shadow the complaints about call/cc vs delimited continuations. More info here: http://okmij.org/ftp/continuations/against-callcc.html http://okmij.org/ftp/continuations/against-callcc.html.