PlaceholderPart class abstract interface

Represents a segment or fragment of a placeholder expression.

A Part is a building block used during placeholder parsing and resolution. It may represent literal text or a placeholder that must be resolved using a `PartResolutionContext`.

This interface is used by the placeholder parsing engine to build a list of Parts which can then be resolved dynamically during runtime.

You typically do not implement this directly unless building a custom placeholder parser or resolver engine.

Example usage

final context = MyPartResolutionContext(); // Your custom implementation
final parts = <Part>[...]; // Populated from parsing
final resolved = Part.resolveAll(parts, context);
print(resolved); // Prints the fully resolved placeholder string