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But when I import "github.com/emirpasic/gods/queues/priorityqueue" and build the code on https://go.dev/play, I meet the error:
go: finding module for package github.com/emirpasic/gods/queues/priorityqueue
go: downloading github.com/emirpasic/gods v1.18.1
go: found github.com/emirpasic/gods/queues/priorityqueue in github.com/emirpasic/gods v1.18.1
./prog.go:11:31: invalid operation: cannot index priorityqueue.NewWith (value of type func(comparator utils.Comparator) *priorityqueue.Queue)
Here are some source codes:
// NewWith instantiates a new empty queue with the custom comparator.funcNewWith[Tcomparable](comparator utils.Comparator[T]) *Queue[T] {
return&Queue[T]{heap: binaryheap.NewWith(comparator), Comparator: comparator}
}
// comparable is an interface that is implemented by all comparable types// (booleans, numbers, strings, pointers, channels, arrays of comparable types,// structs whose fields are all comparable types).// The comparable interface may only be used as a type parameter constraint,// not as the type of a variable.typecomparableinterface{ comparable }
But, I have added generics and implemented comparators, why are there still errors?
Meanwhile, while compiling the code locally, I encountered this error again:
D:\space\algorithm\leetcode-top-interview-questions\src> go build .\problem_0023_merge_k_sorted_lists.go
# github.com/emirpasic/gods/queues/priorityqueue
D:\opt\go1.22\gopath\pkg\mod\github.com\emirpasic\gods@v1.18.1\queues\priorityqueue\iterator.go:13:7: type instantiation requires go1.18 or later (-lang was set to go1.2; check go.mod)
D:\opt\go1.22\gopath\pkg\mod\github.com\emirpasic\gods@v1.18.1\queues\priorityqueue\iterator.go:16:15: type parameter requires go1.18 or later (-lang was set to go1.2; check go.mod)
D:\opt\go1.22\gopath\pkg\mod\github.com\emirpasic\gods@v1.18.1\queues\priorityqueue\iterator.go:16:17: predeclared comparable requires go1.18 or later (-lang was set to go1.2; check go.mod)
D:\opt\go1.22\gopath\pkg\mod\github.com\emirpasic\gods@v1.18.1\queues\priorityqueue\iterator.go:17:12: type instantiation requires go1.18 or later (-lang was set to go1.2; check go.mod)
D:\opt\go1.22\gopath\pkg\mod\github.com\emirpasic\gods@v1.18.1\queues\priorityqueue\priorityqueue.go:32:12: type parameter requires go1.18 or later (-lang was set to go1.2; check go.mod)
D:\opt\go1.22\gopath\pkg\mod\github.com\emirpasic\gods@v1.18.1\queues\priorityqueue\priorityqueue.go:32:14: predeclared comparable requires go1.18 or later (-lang was set to go1.2; check go.mod)
D:\opt\go1.22\gopath\pkg\mod\github.com\emirpasic\gods@v1.18.1\queues\priorityqueue\priorityqueue.go:33:14: type instantiation requires go1.18 or later (-lang was set to go1.2; check go.mod)
D:\opt\go1.22\gopath\pkg\mod\github.com\emirpasic\gods@v1.18.1\queues\priorityqueue\priorityqueue.go:34:13: type instantiation requires go1.18 or later (-lang was set to go1.2; check go.mod)
D:\opt\go1.22\gopath\pkg\mod\github.com\emirpasic\gods@v1.18.1\queues\priorityqueue\priorityqueue.go:37:10: type parameter requires go1.18 or later (-lang was set to go1.2; check go.mod)
D:\opt\go1.22\gopath\pkg\mod\github.com\emirpasic\gods@v1.18.1\queues\priorityqueue\priorityqueue.go:42:14: type parameter requires go1.18 or later (-lang was set to go1.2; check go.mod)
D:\opt\go1.22\gopath\pkg\mod\github.com\emirpasic\gods@v1.18.1\queues\priorityqueue\iterator.go:13:7: too many errors
My Go version is go version go1.22.0 windows/amd64. And this is my go.mod
This is a leetcode problem:merge k sorted lists, I want to use a heap to solve it, and the following code can be AC.
But type assertion is required, and I want to add generics to solve this problem. I noticed that the following libraries have already introduced generics: https://github.com/emirpasic/gods/blob/master/queues/priorityqueue/priorityqueue.go
So I adjusted my code and added generics:
But when I import "github.com/emirpasic/gods/queues/priorityqueue" and build the code on https://go.dev/play, I meet the error:
Here are some source codes:
But, I have added generics and implemented comparators, why are there still errors?
Meanwhile, while compiling the code locally, I encountered this error again:
My Go version is go version go1.22.0 windows/amd64. And this is my go.mod
How can I solve the above two problems? Thank you!
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