mirror of
https://github.com/letic/terraform-provider-google.git
synced 2024-09-07 01:26:43 +00:00
100 lines
2.8 KiB
Go
100 lines
2.8 KiB
Go
![]() |
package convert
|
||
|
|
||
|
import (
|
||
|
"github.com/zclconf/go-cty/cty"
|
||
|
)
|
||
|
|
||
|
// conversion is an internal variant of Conversion that carries around
|
||
|
// a cty.Path to be used in error responses.
|
||
|
type conversion func(cty.Value, cty.Path) (cty.Value, error)
|
||
|
|
||
|
func getConversion(in cty.Type, out cty.Type, unsafe bool) conversion {
|
||
|
conv := getConversionKnown(in, out, unsafe)
|
||
|
if conv == nil {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// Wrap the conversion in some standard checks that we don't want to
|
||
|
// have to repeat in every conversion function.
|
||
|
return func(in cty.Value, path cty.Path) (cty.Value, error) {
|
||
|
if !in.IsKnown() {
|
||
|
return cty.UnknownVal(out), nil
|
||
|
}
|
||
|
if in.IsNull() {
|
||
|
// We'll pass through nulls, albeit type converted, and let
|
||
|
// the caller deal with whatever handling they want to do in
|
||
|
// case null values are considered valid in some applications.
|
||
|
return cty.NullVal(out), nil
|
||
|
}
|
||
|
|
||
|
return conv(in, path)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
func getConversionKnown(in cty.Type, out cty.Type, unsafe bool) conversion {
|
||
|
switch {
|
||
|
|
||
|
case out == cty.DynamicPseudoType:
|
||
|
// Conversion *to* DynamicPseudoType means that the caller wishes
|
||
|
// to allow any type in this position, so we'll produce a do-nothing
|
||
|
// conversion that just passes through the value as-is.
|
||
|
return dynamicPassthrough
|
||
|
|
||
|
case unsafe && in == cty.DynamicPseudoType:
|
||
|
// Conversion *from* DynamicPseudoType means that we have a value
|
||
|
// whose type isn't yet known during type checking. For these we will
|
||
|
// assume that conversion will succeed and deal with any errors that
|
||
|
// result (which is why we can only do this when "unsafe" is set).
|
||
|
return dynamicFixup(out)
|
||
|
|
||
|
case in.IsPrimitiveType() && out.IsPrimitiveType():
|
||
|
conv := primitiveConversionsSafe[in][out]
|
||
|
if conv != nil {
|
||
|
return conv
|
||
|
}
|
||
|
if unsafe {
|
||
|
return primitiveConversionsUnsafe[in][out]
|
||
|
}
|
||
|
return nil
|
||
|
|
||
|
case out.IsListType() && (in.IsListType() || in.IsSetType()):
|
||
|
inEty := in.ElementType()
|
||
|
outEty := out.ElementType()
|
||
|
if inEty.Equals(outEty) {
|
||
|
// This indicates that we're converting from list to set with
|
||
|
// the same element type, so we don't need an element converter.
|
||
|
return conversionCollectionToList(outEty, nil)
|
||
|
}
|
||
|
|
||
|
convEty := getConversion(inEty, outEty, unsafe)
|
||
|
if convEty == nil {
|
||
|
return nil
|
||
|
}
|
||
|
return conversionCollectionToList(outEty, convEty)
|
||
|
|
||
|
case out.IsListType() && in.IsTupleType():
|
||
|
outEty := out.ElementType()
|
||
|
return conversionTupleToList(in, outEty, unsafe)
|
||
|
|
||
|
case out.IsMapType() && in.IsObjectType():
|
||
|
outEty := out.ElementType()
|
||
|
return conversionObjectToMap(in, outEty, unsafe)
|
||
|
|
||
|
default:
|
||
|
return nil
|
||
|
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// retConversion wraps a conversion (internal type) so it can be returned
|
||
|
// as a Conversion (public type).
|
||
|
func retConversion(conv conversion) Conversion {
|
||
|
if conv == nil {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
return func(in cty.Value) (cty.Value, error) {
|
||
|
return conv(in, cty.Path(nil))
|
||
|
}
|
||
|
}
|