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range.go
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range.go
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package vee
import (
"fmt"
"golang.org/x/exp/constraints"
)
type (
RangeConstraint[T constraints.Ordered] struct {
Value T
Min T
Max T
}
MinConstraint[T constraints.Ordered] struct {
Value T
Min T
}
MaxConstraint[T constraints.Ordered] struct {
Value T
Max T
}
)
func Range[T constraints.Ordered](min, max T) CheckableValue[T] {
return &RangeConstraint[T]{
Min: min,
Max: max,
}
}
func Min[T constraints.Ordered](min T) CheckableValue[T] {
return &MinConstraint[T]{
Min: min,
}
}
func Max[T constraints.Ordered](max T) CheckableValue[T] {
return &RangeConstraint[T]{
Max: max,
}
}
func (c *RangeConstraint[T]) SetValue(value T) {
c.Value = value
}
func (c *RangeConstraint[T]) Check() error {
if c.Value > c.Max {
return fmt.Errorf("is greater than maximum %v", c.Max)
} else if c.Value < c.Min {
return fmt.Errorf("is less than minimum %v", c.Min)
}
return nil
}
func (c *MinConstraint[T]) SetValue(value T) {
c.Value = value
}
func (c *MinConstraint[T]) Check() error {
if c.Value < c.Min {
return fmt.Errorf("is less than minimum %v", c.Min)
}
return nil
}
func (c *MaxConstraint[T]) SetValue(value T) {
c.Value = value
}
func (c *MaxConstraint[T]) Check() error {
if c.Value > c.Max {
return fmt.Errorf("is greater than maximum %v", c.Max)
}
return nil
}