Upgrading from v0.0.x

Rules are still configured by pointers to the fields of the model, but the configurator is typed now and knows nothing about the types of the values: a field is converted to the configurator of its type by As. Go 1.27 is required.

v0.0.x	Now
github.com/insei/valigo/str, github.com/insei/valigo/num	github.com/insei/valigo/rules/str, github.com/insei/valigo/rules/num, also rules/eq and rules/timex
github.com/insei/valigo/uuid of the core module	the separate module github.com/insei/valigo/rules/uuid
—	the integrations are the separate modules github.com/insei/valigo/integrations/huma, integrations/gin, integrations/echo
b.String(&u.Name)	b.Field(&u.Name).As(str.Of)
b.Number(&u.Age)	b.Field(&u.Age).As(num.Of)
b.Number(&u.Score) for *int	b.Field(&u.Score).As(num.Ptr)
b.UUID(&u.ID)	b.Field(&u.ID).As(vuuid.Of) of the separate module github.com/insei/valigo/rules/uuid
b.StringSlice(&u.Tags)	b.Slice(&u.Tags).As(str.Slice), for *[]string: b.Field(&u.Tags).As(shared.SlicePtr).As(str.Slice)
b.UUIDSlice(&u.IDs)	b.Slice(&u.IDs).As(vuuid.Slice)
b.Slice(any) with Custom(func(ctx, h, value []*any) ...)	b.Slice(&u.Items) with Custom(func(ctx, h, value shared.Elems[E]) ...) and Each
Configurator[T] is an interface	a struct with generic methods, the signature of the Configure function is the same
field configurators are interfaces: str.BaseConfigurator, num.BaseConfigurator	pointers to concrete types: *str.BaseConfigurator, *num.BaseConfigurator[N], *vuuid.BaseConfigurator
Max(any), Min(any), AnyOf(...any), AnyOfInterval(any, any)	the arguments have the type of the field, Max(5) works for int64
Custom(func(ctx, h, value any) ...), When(func(ctx, value any) bool) of fields	the value is typed: string, the number type, uuid.UUID
StringSlice(...).MaxLen(n)	the same: the number of elements; rules on elements are set by Each
shared.NewSliceFieldConfigurator(params), shared.FieldConfigurator	shared.NewSliceFieldConfigurator(field, helper, fields, add, describe), shared.Field[T]

Behavior changes

• Validate returns nil for a valid object, it returned an empty slice. Check len(errs) > 0 or errs != nil, both work now.
• A struct value is validated by a copy, it was silently skipped.
• Nil pointers and the fields of nil nested structs are skipped by rules, they panicked; Required fails on them.
• Required of num.Of fails on zero, it did nothing. Required of num.Ptr fails on nil.
• AnyOfInterval(begin, end) includes both ends.
• The errors of slice elements have the index in the location: Tags[1].
• A field When isn't called for an absent value, it got the zero value.
• A repeated Configure of the same type replaces its rules, it appended them.
• shared.Error has Code and Params, its JSON has them when they aren't empty; the messages of counts have plural forms: "longer than 1 character".