Trampoline

Q: How deeply does Functional Programming in Scala, Second Edition cover trampoline?

Explains the execution protocol and stack-eliminating technique, including FlatMap reassociation, but stops short of broader implementation details.

As explained in Functional Programming in Scala, Second Edition

A trampoline is a control mechanism that repeatedly executes returned computation steps through a single driver loop rather than nested calls.

A trampoline repeatedly executes returned computation steps through one driver loop instead of relying on nested calls. An IO program yields Suspend or FlatMap requests, returns control to unsafeRun, and resumes one suspension at a time. section 13.3.1

Driving an IO program

unsafeRun handles Return directly, evaluates Suspend, and continues FlatMap computations. When nested FlatMaps appear, it reassociates them before continuing, allowing the loop to drive the program rather than growing the call stack.

How Functional Programming in Scala, Second Edition covers it

Cover of Functional Programming in Scala, Second Edition

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Related concepts

loop-recurimplements · In Clojure, loop/recur is a construct that re-enters a loop or function with replacement values without growing the call stack.
mutual recursionaddresses · Mutual recursion is a recursive computation in which two or more functions call one another.
iteratealternative to · Iterate is an operation that advances through successive values or states according to specified functions or iteration rules.
combinatorkind of · A combinator is a function or computational construct that combines, composes, or transforms smaller functions or computations into a larger operation.
stack overflowaddresses · A stack overflow is a runtime failure caused by exhausting the available capacity of a program’s call stack.
thunkused by · A thunk is a parameterless function or wrapper representing a computation or value whose evaluation is delayed until it is invoked or accessed.

This explainer was generated by Manning's knowledge graph from the text of Functional Programming in Scala, Second Edition. The section links point to the parts of the book it draws on.