// Package goose contains directives for goose code generation.
package goose

// ProviderSet is a marker type that collects a group of providers.
type ProviderSet struct{}

// NewSet creates a new provider set that includes the providers in
// its arguments. Each argument is either an exported function value,
// an exported struct (zero) value, or a call to Bind.
func NewSet(...interface{}) ProviderSet {
	return ProviderSet{}
}

// Use is placed in the body of an injector function to declare the
// providers to use. Its arguments are the same as NewSet. Its return
// value is an error message that can be sent to panic.
//
// Example:
//
//	func injector(ctx context.Context) (*sql.DB, error) {
//		panic(Use(otherpkg.Foo, myProviderFunc, goose.Bind()))
//	}
func Use(...interface{}) string {
	return "implementation not generated, run goose"
}

// A Binding maps an interface to a concrete type.
type Binding struct{}

// Bind declares that a concrete type should be used to satisfy a
// dependency on iface.
//
// Example:
//
//	var MySet = goose.NewSet(goose.Bind(MyInterface(nil), new(MyStruct)))
func Bind(iface, to interface{}) Binding {
	return Binding{}
}