How to properly dereference a pointer field in environment?

[the729]

I have the following struct that serves as an environment input:

type struct InputStruct {
	Enabled *bool `json:"enabled"`
}

var v InputStruct
// unmarshal json into struct v
// ...

env := map[string]any {
	"v": v,
}

I need to write an expression that evaluates the Enabled field and returns:

• "default" when the pointer is nil
• "enabled" when the dereferenced value is true
• "disabled" when the dereferenced value is false

The best solution I've come up with so far is:

v.Enabled == nil ? 'default' : ( (v.Enabled??'nil') ? 'enabled' : 'disabled' )

Is this the most idiomatic way to handle this case in Expr?

[antonmedv]

This is the bug in expr compilation as it can't dereference inside "if".
I created a issue to track all deref problems: #836

Workaround is to "trigger" dereferencing:

v.Enabled == nil ? 'default' : ( v.Enabled == true ? 'enabled' : 'disabled' )