issues populating an Array of Tables

[BrandonC]

I can't seem to get values back from an array of tables

Code:

package main

import (
	"fmt"
	"os"

	"github.com/BurntSushi/toml"
)

type (
	Node struct {
		Key	string
		Arr	[]SubNode
	}

	SubNode	struct {
		Name	string
	}
)

func main() {
	t := `
		key="Val"

		[[SubNode]]
		name="first"

		[[SubNode]]
		name="second"
	`

	var node Node
	_, err := toml.Decode(t, &node)
	if err != nil {
		os.Exit(1)
	}
	
	fmt.Println("node key: " + node.Key)
	fmt.Println("arr: " + node.Arr[0].Name)
}

output:

node key: Val
panic: runtime error: index out of range [0] with length 0

it's able to pull the value from the root level table's field but doesn't seem to register there being any values in the array of tables. Is there something I'm missing?

[Martin Tournoij]

The struct field name doesn't match with what's in the TOML file; it doesn't know that [[SubNode]] is supposed to go in to that Arr field. You'll have to use:

type Node struct {
	Key string
	Arr []SubNode `toml:"SubNode"`
}

Or:

type Node struct {
	Key     string
	SubNode []SubNode
}