package main

type gotype struct {
	SliceOf *gotype
	MapKey  *gotype
	MapVal  *gotype
	PtrTo   *gotype
	Plain   string
	// TODO channel-of (although we will never? construct one from PHP source)
}

func (gt gotype) AsGoString() string {
	if gt.SliceOf != nil {
		return "[]" + gt.SliceOf.AsGoString()

	} else if gt.MapKey != nil {
		return "map[" + gt.MapKey.AsGoString() + "]" + gt.MapVal.AsGoString()

	} else if gt.PtrTo != nil {
		return "*" + gt.PtrTo.AsGoString()

	} else {
		return gt.Plain

	}
}

// ZeroValue returns a Go literal string for the zero value of this type.
func (gt gotype) ZeroValue() string {
	if gt.SliceOf != nil || gt.MapKey != nil || gt.PtrTo != nil {
		return `nil` // gt.AsGoString() + "{}"

	}

	// It's a plain type

	switch gt.Plain {
	case "byte",
		"int", "int8", "int16", "int32", "int64",
		"uint", "uint8", "uint16", "uint32", "uint64",
		"float", "float64":
		return `0`

	case "bool":
		return `false`

	case "string":
		return `""`

	case "rune":
		return `''`

	default:
		// probably a struct type
		return gt.AsGoString() + `{}`

	}

}