sealed trait DebugFrontend extends AnyRef
A common interface for a debug frontend for a debugger to present the debug tree. Inherit from one of the two provided subtraits to use.
Any compliant implementation that handles all nodes of a parsley.debugger.DebugTree can be used in place of any other implementation (e.g. a serialiser to JSON, a GUI, etc.).
If a frontend is reusable, one can implement it as either an object or a class, but an object
is recommended. Either way, it should inherit ReusableFrontend.
If a frontend is single-use (e.g. it has some non-reusable state), never implement it as an object. Always
implement single-use frontends as a class of some sort inheriting from SingleUseFrontend.
If the results of some processing of a tree are needed out of a frontend, create a frontend class that accepts
some continuation parameter of ReturnType => Unit and call it somewhere within the implementation.
- Source
- DebugFrontend.scala
- Since
4.5.0
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- abstract def processImpl(input: => String, tree: => DebugTree): Unit
The actual method that does the processing of the tree.
The actual method that does the processing of the tree. Override this to process a tree in a custom way.
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- abstract val reusable: Boolean
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- protected[frontend]
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- final def process(input: => String, tree: => DebugTree): Unit
Process a debug tree using whatever the frontend is doing to present the tree in some way.
Process a debug tree using whatever the frontend is doing to present the tree in some way.
- input
The full input of the parse.
- tree
Debug tree to process.
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