Explain the use of Go's type polymorphism and type generics for creating generic and reusable code in Go programs?
Go has support for type polymorphism through the use of interfaces, which allow a single function to accept different types of parameters as long as they satisfy the interface contract. This means that different types can be used interchangeably in certain parts of the code.
On the other hand, Go does not have support for type generics, which means that it is not possible to write functions or data structures that can be used with different types without specifying the type explicitly. This can lead to code duplication or the use of interface to achieve generic behavior, which can have performance implications and make the code harder to understand.
However, there are some libraries and tools in the Go ecosystem that provide support for type generics, such as the go-generics proposal, the genny library, and the generics package in the golang.org/x/tools module. These solutions allow developers to write generic code that is type-safe and efficient.