Interface embedding in Go enables structs to inherit fields and methods from other types for efficient code composition.
Interface embedding in Go allows a struct to inherit the fields and methods of another type by declaring it as an anonymous field, enabling code reuse and composition. In the Go compiler's IR, types like miniExpr embed miniNode to automatically gain common fields like pos, op, and bits without redefining them.
type miniExpr struct {
miniNode // Embedded type inherits fields
flags bitset8
typ *types.Type
init Nodes
}
Interface embedding lets you build complex types by combining smaller, reusable pieces, much like snapping Lego blocks together. Instead of rewriting common features for every new type, you simply include the existing type as a field, and it automatically becomes part of the new one. This keeps your code cleaner and reduces the chance of errors when updating shared functionality.