Check

func Check(v interface{}, lang ...language.Tag) (errs []*ErrContext, ok bool)

Validate v against its struct tags and (optionally) its Validate() error method. Returns the list of failures and an ok flag that's true only when no failures occurred.

Inputs

Param	Notes
v	Struct, struct pointer, or slice of structs. Other kinds (maps, ints, …) return (nil, true).
lang	Optional locale. First value wins; the rest are ignored. Defaults to language.Chinese.

Behavior

1. Nil-safe. nil and typed-nil pointers return (nil, true).
2. Pointer-aware. Pointers are dereferenced; the original value's method set is captured first so Validate() works whether you pass the value or a pointer.
3. Recursive. Nested structs and slices of structs are walked automatically (see Nested Structs & Slices).
4. Tag-driven. Each rule from valid:"…" runs against the field's value, using Checkers to resolve the checker function.
5. Validate hook. After tag rules, if v (or its pointer) has a Validate() error, govalid invokes it and appends any non-nil error.

Examples

Basic

errs, ok := govalid.Check(form)

Locale per call

errs, ok := govalid.Check(form, language.English)

Slice of structs

items := []Item{{Name: ""}, {Name: "ok"}}
errs, ok := govalid.Check(items)

Nil pointer

var f *Form
errs, ok := govalid.Check(f) // returns (nil, true)

Return value

errs is a slice of *ErrContext, each implementing error. Order is:

1. Top-level field declaration order.
2. Within a slice-of-structs field, element order.
3. Within an element, field declaration order.
4. Validate() errors come last.