Inspecting Structs

Reflection on plain values shows what kind of thing you're holding, but most real reflection work happens against structs: pulling field names for a SQL row mapper, dumping a config for a debug endpoint, or writing a generic JSON-like serializer. This chapter walks through the API the reflect package exposes for that: how to iterate fields, how to read each field's metadata, how to read and write field values, and how Go's export rules constrain what you can do with unexported fields.