/
valueAssertion.go
61 lines (51 loc) · 1.18 KB
/
valueAssertion.go
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package arg
import (
"fmt"
"reflect"
"github.com/Bofry/arg/internal"
)
var (
_ValueAssertion = ValueAssertion("")
_ ValueValidator = _ValueAssertion.NotNil
)
type ValueAssertion string
func (ValueAssertion) Assert(v interface{}, name string, validators ...ValueValidator) error {
for _, validate := range validators {
if err := validate(v, name); err != nil {
return err
}
}
return nil
}
func (ValueAssertion) Assertor(v interface{}, name string) *ValueAssertor {
return &ValueAssertor{v, name}
}
func (ValueAssertion) NotNil(v interface{}, name string) error {
if v == nil || reflect.ValueOf(v).IsNil() {
return &InvalidArgumentError{
Name: name,
Reason: internal.ERR_NIL,
}
}
return nil
}
func (ValueAssertion) MustNil(v interface{}, name string) error {
if v != nil || !reflect.ValueOf(v).IsNil() {
return &InvalidArgumentError{
Name: name,
Reason: internal.ERR_NON_NIL,
}
}
return nil
}
func (ValueAssertion) Must(fn ValuePredicate) ValueValidator {
return func(v interface{}, name string) error {
if !fn(v) {
return &InvalidArgumentError{
Name: name,
Reason: fmt.Sprintf(internal.ERR_INVALID_VALUE, v),
}
}
return nil
}
}