How can I get Value as interface about go-cty HOT 4 CLOSED

Hi @vietanhduong,

All of the algorithms in cty that work with arbitrary values are recursive in some way, whether it be recursive through the cty.Value collection/structural type nesting, or through something else like reflection over Go structs.

It seems like an inherently recursive problem to me, so I have trouble imagining any algorithms that wouldn't have the same effect as recursion, even if they are e.g. a flat loop that manages a stack itself rather than using the Go runtime's own stack. So I'm not sure what to suggest, unless there is some way you can constrain the problem, such as:

• Working only with the primitive types, which means you'll never need to do any recursion.
• Setting a reasonable maximum depth after which your algorithm will abort with an error, or perhaps summarize the deep nodes using special placeholder values.
• Make your function take a static cty.Type that the value is expected to conform to and then do recursion over that type rather than over the value. That way you can be sure that the maximum stack depth will be the maximum depth of that predefined type, not some arbitrary depth decided by whoever constructed the cty.Value. (That is roughly what gocty does, although it uses predefined Go structs via the reflect package as the basis for the recursion, rather than a cty.Type directly.)

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Hi @vietanhduong,

The interface{} field inside cty.Value is an implementation detail and intentionally not exposed directly.

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Thank you for answer me. What I'm doing is create a function to convert a cty.Value to interface{}. It's work really well, but I'm considering have any way better than my way? Because it's using recursive, and I don't want it.

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Thank you, @apparentlymart. Seem like my question is answered. This issue will be closed here.

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