65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
package cty
|
|
|
|
// UnknownAsNull returns a value of the same type as the given value but
|
|
// with any unknown values (including nested values) replaced with null
|
|
// values of the same type.
|
|
//
|
|
// This can be useful if a result is to be serialized in a format that can't
|
|
// represent unknowns, such as JSON, as long as the caller does not need to
|
|
// retain the unknown value information.
|
|
func UnknownAsNull(val Value) Value {
|
|
ty := val.Type()
|
|
switch {
|
|
case val.IsNull():
|
|
return val
|
|
case !val.IsKnown():
|
|
return NullVal(ty)
|
|
case ty.IsListType() || ty.IsTupleType() || ty.IsSetType():
|
|
length := val.LengthInt()
|
|
if length == 0 {
|
|
// If there are no elements then we can't have unknowns
|
|
return val
|
|
}
|
|
vals := make([]Value, 0, length)
|
|
it := val.ElementIterator()
|
|
for it.Next() {
|
|
_, v := it.Element()
|
|
vals = append(vals, UnknownAsNull(v))
|
|
}
|
|
switch {
|
|
case ty.IsListType():
|
|
return ListVal(vals)
|
|
case ty.IsTupleType():
|
|
return TupleVal(vals)
|
|
default:
|
|
return SetVal(vals)
|
|
}
|
|
case ty.IsMapType() || ty.IsObjectType():
|
|
var length int
|
|
switch {
|
|
case ty.IsMapType():
|
|
length = val.LengthInt()
|
|
default:
|
|
length = len(val.Type().AttributeTypes())
|
|
}
|
|
if length == 0 {
|
|
// If there are no elements then we can't have unknowns
|
|
return val
|
|
}
|
|
vals := make(map[string]Value, length)
|
|
it := val.ElementIterator()
|
|
for it.Next() {
|
|
k, v := it.Element()
|
|
vals[k.AsString()] = UnknownAsNull(v)
|
|
}
|
|
switch {
|
|
case ty.IsMapType():
|
|
return MapVal(vals)
|
|
default:
|
|
return ObjectVal(vals)
|
|
}
|
|
}
|
|
|
|
return val
|
|
}
|