package xerrors_test

import "code.nochebuena.dev/go/xerrors"

// Compile-time contract verification.
//
// These assertions are zero-cost at runtime — the nil pointers are never
// dereferenced. If any method is removed or its signature changes, the build
// fails immediately here rather than at a distant call site in another module.

// richError is the shape that logz and other consumers expect from any structured
// error produced by this package. Adding methods to Err is non-breaking. Removing
// any of these or changing their signature is a breaking change.
var _ interface {
	error
	Unwrap() error
	ErrorCode() string
	ErrorContext() map[string]any
} = (*xerrors.Err)(nil)

// jsonMarshaler verifies Err implements json.Marshaler.
var _ interface {
	MarshalJSON() ([]byte, error)
} = (*xerrors.Err)(nil)