42 lines
1.4 KiB
Go
42 lines
1.4 KiB
Go
package json
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import (
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"github.com/zclconf/go-cty/cty"
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)
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// SimpleJSONValue is a wrapper around cty.Value that adds implementations of
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// json.Marshaler and json.Unmarshaler for simple-but-type-lossy automatic
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// encoding and decoding of values.
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//
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// The couplet Marshal and Unmarshal both take extra type information to
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// inform the encoding and decoding process so that all of the cty types
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// can be represented even though JSON's type system is a subset.
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//
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// SimpleJSONValue instead takes the approach of discarding the value's type
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// information and then deriving a new type from the stored structure when
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// decoding. This results in the same data being returned but not necessarily
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// with exactly the same type.
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//
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// For information on how types are inferred when decoding, see the
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// documentation of the function ImpliedType.
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type SimpleJSONValue struct {
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cty.Value
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}
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// MarshalJSON is an implementation of json.Marshaler. See the documentation
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// of SimpleJSONValue for more information.
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func (v SimpleJSONValue) MarshalJSON() ([]byte, error) {
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return Marshal(v.Value, v.Type())
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}
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// UnmarshalJSON is an implementation of json.Unmarshaler. See the
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// documentation of SimpleJSONValue for more information.
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func (v *SimpleJSONValue) UnmarshalJSON(buf []byte) error {
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t, err := ImpliedType(buf)
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if err != nil {
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return err
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}
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v.Value, err = Unmarshal(buf, t)
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return err
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}
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