📁Structs

Struct Declaration Syntax

[export] struct <StructName>[Generics] {
  [export] <FieldName>: <FieldType> [`FieldTag`] // Syntax of fields
  <EmbeddedInterfaces> // Syntax of embedded interfaces
  <EmbeddedStructs> // Syntax of embedded structs
}

For syntax of Generics - Common placeholders throughout documentation

Struct Construction

<StructName>[GenericsInstantiation]{Field1 = Value1, etc}

Working Example

Embedded fields can only be accessed off of the embedded type. They are not a part of the "overall" type. For instance, if B with field C is embedded into A, then C can only be accessed by A.B.C, not A.C.

While generics were not needed in this specific example, they were used to showcase syntax

Gauntlet

package main

import "fmt" as fmt
import "golang.org/x/exp/constraints" as constraints

struct BankAccount[T : constraints.Integer] {
  Retirement: T 
  Checking: T
  Total: T
}

struct Human[T: constraints.Integer] {
  export FullName: String
  export Age: Int
  BankAccount[T]
}


fun main(): Unit {
  let age = 28
  let firstName = "John"
  let lastName = "Doe"
  let fullName = firstName + " " + lastName
  let john = Human[Int]{FullName = fullName, Age = age, BankAccount = BankAccount[Int]{Retirement = 100000, Checking = 1000, Total = 100000 + 1000}}
  fmt.println("John's full name is:")
  fmt.println(john.FullName)
  fmt.println("In total, he has this much money:")
  fmt.println(john.BankAccount.Total)

}

Transpiled

package main

import fmt "fmt"
import constraints "golang.org/x/exp/constraints"

type bankAccount[T constraints.Integer] struct {
	total      T
	checking   T
	retirement T
}

type human[T constraints.Integer] struct {
	Age      int
	FullName string

	bankAccount[T]
}

func main() {
	age := 28
	firstName := "John"
	lastName := "Doe"
	fullName := firstName + " " + lastName
	john := human[int]{FullName: fullName, Age: age, bankAccount: bankAccount[int]{retirement: 100000, checking: 1000, total: 100000 + 1000}}
	fmt.Println("John's full name is:")
	fmt.Println(john.FullName)
	fmt.Println("In total, he has this much money:")
	fmt.Println(john.bankAccount.total)
	// Eliminates any 'unused variable' errors
	_, _, _, _, _ = age, firstName, fullName, john, lastName

}

Output

John's full name is:
John Doe
In total, he has this much money:
101000