Merge without override assume false is a valid non empty type

[kotyara85]

Here's an example

type Option struct {
	test    bool
}

o := Option{}

mergo.Merge(&o, &Option{test: true})

In this example test will be false. WithOverride won't really work here, because any other type will be overwritten in this case. I guess custom transformers will help here?

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[nilsgstrabo]

According to docs this is expected behavior Mergo won't merge unexported (private) fields Rename field test to Test and it will work as expected

[rfay]

I don't think this problem is just unexported variables. I think any false is considered empty and thus doesn't have the expected behavior.

[darccio]

@rfay I confirm it's just unexported variables, as @nilsgstrabo pointed. If you test it exporting test, it works as expected (no false value overrides a true value).