Practical Macros
Use cases.
Macros in the Real World
Beyond toy examples, macros solve concrete problems: capturing source context, deriving type classes, validating literals, and generating boilerplate-free code.
Use Case: assert with Message
A macro can capture the source text of a failing condition to produce a helpful assertion message automatically.
import scala.quoted.*
inline def myAssert(inline cond: Boolean): Unit =
${ assertImpl('cond) }All lessons in this course
- Inline Methods
- Macros Basics
- Quotes and Splices
- Practical Macros