Golang : Is conversion between different struct types possible?

by

To give a reference to OneOfOne’s answer, see the Conversions section of the spec.

It states that

A non-constant value x can be converted to type T in any of these
cases:

  • x is assignable to T.
  • x‘s type and T have identical underlying types.
  • x‘s type and T are unnamed pointer types and their pointer base types have identical underlying types.
  • x‘s type and T are both integer or floating point types.
  • x‘s type and T are both complex types.
  • x is an integer or a slice of bytes or runes and T is a string type.
  • x is a string and T is a slice of bytes or runes.

The first and highlighted case is your case. Both types have the underlying type 

[]struct { Field1 string Field2 int }

An underlying type is defined as

If T is one of the predeclared boolean, numeric, or string types, or a type literal, the corresponding underlying type is T itself. Otherwise, T‘s underlying type is the underlying type of the type to which T refers in its type declaration. (spec, Types)

You are using a type literal to define your type so this type literal is your underlying type.

More Related Contents:

  1. Initialize nested struct definition
  2. How to set and get fields in struct’s method
  3. Assign struct with another struct
  4. Can embedded struct method have knowledge of parent/child?
  5. Missing type in composite literal
  6. How to check for an empty struct?
  7. nested struct initialization literals
  8. Sizeof struct in Go
  9. What is the correct way to retrieve length of an array added a field in nested struct in golang
  10. How do I do a literal *int64 in Go?
  11. How to clone a struct storing a boxed trait object?
  12. Go embedded struct call child method instead parent method
  13. Generic Structs with Go
  14. Why struct fields are showing empty?
  15. Invoking struct function gives “cannot refer to unexported field or method”
  16. How to update map values in Go
  17. package’s type cannot be used as the vendored package’s type
  18. How to set default values in Go structs
  19. Order of the code and performance
  20. Swift and mutating struct
  21. Efficient Go serialization of struct to disk
  22. What is the idiomatic way in Go to create a complex hierarchy of structs?
  23. Unmarshal 2 different structs in a slice
  24. Struct in for loop initializer
  25. When do you embed mutex in struct in Go?
  26. How to clone a structure with unexported field?
  27. Why can’t I append to a slice that’s the property of a struct in golang?
  28. Test for nil values in nested stucts
  29. How to filter fields from a mongo document with the official mongo-go-driver
  30. unmarshalling arbitrary data

Leave a Comment