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Type-safe and user-friendly error handling in Swift 6
Learn how to implement user-friendly, type-safe error handling in Swift 6 with structured diagnostics and a hierarchical error model.
She came up with this user-friendly layered error message model, and I turned it into a technique we even ended up using in Toucan, our Swift-based static site generator at Binary Birds. A private helper function used by logMessageStack() to recursively format the full error tree into a readable string with branch indicators. When dealing with more complex errors, we can dig a bit deeper and use a lookup function to handle a specific scenario using a simple switch:
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