无法将结构类型参数传递给另一个包中的函数

Question

I have two packages: offer.go and parser.go. I have a variable cart of type struct Data. I want to pass it as an argument to a function which is in another package parser. However I am not able to do that. Please look into the following:

offer.go

package offer

import "go_tests/Parser"

type Data struct {
    Id       int
    Quantity int
    Mrp      float64
    Discount float64
}
cart := make(map[int]Data)
//cart has some data in it
//passing it to parser
Parser.BXATP(offer_id, rule.Description, cart, warehouseId)

parser.go

package Parser

type Data struct {
    Id       int
    Quantity int
    Mrp      float64
    Discount float64
}

func BXATP(offer_id int, rule string, cart map[int]Data, warehouseId int){
 //my code is here
}

However running this, gives me following error:

 cannot use cart (type map[int]Data) as type map[int]Parser.Data in argument to Parser.BXATP

I found this link but the solution doesn't seem to work in my case:

Why passing struct to function with literal struct parameter from current package differs from the same for function from another package?

I change the parser to :

func BXATP(offer_id int, rule string, cart map[int]struct {
    Id       int
    Quantity int
    Mrp      float64
    Discount float64
}, warehouseId int)

But now error is :

 cannot use cart (type map[int]Data) as type map[int]struct { Id int; Quantity int; Mrp float64; Discount float64 } in argument to Parser.BXATP

I don't understand how to achieve this. Any help will be appreciated.

Answer 1

Why do you have Data defined in two packages? If you need the exact same structure, just have it in one package. If you leave it in parser, you can do something like:

package offer

import "go_tests/Parser"

cart := make(map[int]Parser.Data)
//cart has some data in it
//passing it to parser
Parser.BXATP(offer_id, rule.Description, cart, warehouseId)

Types defined in separate packages are different even if they share name and underlying structure. So Parser.Data is not compatible with offer.Data.