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Selector comparison not working #72

@jorgemarey

Description

@jorgemarey

Hi,

Using two selectors in comparison expression doesn't seem to work.

This works:

"value.nomad == test and value.consul == test",

This doesn't:

"value.nomad == value.consul",

The following code shows the problem:

package main

import (
	"fmt"
	"os"

	"github.com/hashicorp/go-bexpr"
	"github.com/hashicorp/go-bexpr/grammar"
)

type Example struct {
	Nomad  string `bexpr:"nomad"`
	Consul string `bexpr:"consul"`
}

func main() {
	value := map[string]Example{
		"value": {Nomad: "prueba", Consul: "prueba"},
	}

	expressions := []string{
		"value.nomad == prueba and value.consul == prueba",
		"value.nomad == value.consul",
	}

	for _, expression := range expressions {
		eval, err := bexpr.CreateEvaluator(expression)

		if err != nil {
			fmt.Printf("Failed to create evaluator for expression %q: %v\n", expression, err)
			continue
		}

		result, err := eval.Evaluate(value)
		if err != nil {
			fmt.Printf("Failed to run evaluation of expression %q: %v\n", expression, err)
			continue
		}

		fmt.Printf("Result of expression %q evaluation: %t\n", expression, result)
	}
}

I guess this is not implemented. Is there any way I can get this working? Thanks

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