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liquid/evaluator/predicates.go
2017-07-05 19:09:59 -04:00

27 lines
635 B
Go

package evaluator
import "reflect"
// IsEmpty returns a bool indicating whether the value is empty according to Liquid semantics.
func IsEmpty(value interface{}) bool {
value = ToLiquid(value)
if value == nil {
return false
}
r := reflect.ValueOf(value)
switch r.Kind() {
case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
return r.Len() == 0
case reflect.Bool:
return !r.Bool()
default:
return false
}
}
// IsTrue returns a bool indicating whether the value is true according to Liquid semantics.
func IsTrue(value interface{}) bool {
value = ToLiquid(value)
return value != nil && value != false
}