Map() map[string]interface{} -> struct, overwrite not working for zero values

[requilence]

package main

import (
	"fmt"
	"github.com/imdario/mergo"
)

type Foo struct {
	A int
	B int
	C int
}

func main() {
	dst := Foo{A: 0, B: 1, C: 2}

	src := map[string]interface{}{
		"A": 3, "B": 4, "C": 0,
	}

	mergo.Map(&dst, src, mergo.WithOverride)
	fmt.Printf("%+v\n", dst)
}

Expected result:
{A:3 B:4 C:0}

Actual result:
{A:3 B:4 C:2}

Looks like Overwrite ignores Value if it is zero.
But it must overwrite struct field in case map have the corresponding key set. Regardless of it's value

[darccio]

I'm aware I have to check this but it will take two weeks to be able to do it. Sorry for my slowness.

[vilipwong]

Hello. i faced the same issue with string and boolean value, using mergo.WithOverwriteWithEmptyValue e.g:

p1 := map[string]interface{}{
	"A": 3, "B": "note", "C": true,
}
p2 := map[string]interface{}{
	"B": "", "C": false,
}
mergo.Merge(&p1, &p2, mergo.WithOverwriteWithEmptyValue)

Expected result:
{A:3 B:"" C:false}

Actual result:
{A:3 B:"note" C:true}