contract

type Constraint ¶

type Constraint interface {
	Validate(value any, field string) ValidationError
}

type ParameterizedConstraint ¶ added in v2.9.0

type ParameterizedConstraint interface {
	Constraint

	WithParams(params map[string]string) (Constraint, error)
}

ParameterizedConstraint is implemented by constraints that accept tag parameters (for example min(value=2)). WithParams returns a NEW constraint configured from the given parameters and must not mutate the receiver; a rule whose parameters cannot be consumed fails closed.

type ValidationError ¶

type ValidationError interface {
	Field() string

	Message() string

	Code() string

	Context() map[string]any

	Error() string
}