4_get_example_test.go

package mu_test

import (
	"errors"
	"fmt"

	"github.com/appthrust/mu"
)

func ExampleEither_Left() {
	// Left with Left value
	left := mu.Left[string, int]("error message")
	leftOpt := left.Left()
	fmt.Println("Left(\"error message\").Left():", leftOpt.IsSome())
	fmt.Println("Value:", leftOpt.OrZero())

	// Left with Right value
	right := mu.Right[string, int](42)
	leftOpt2 := right.Left()
	fmt.Println("Right(42).Left():", leftOpt2.IsNone())

	// Output:
	// Left("error message").Left(): true
	// Value: error message
	// Right(42).Left(): true
}

func ExampleEither_Right() {
	// Right with Right value
	right := mu.Right[string, int](42)
	rightOpt := right.Right()
	fmt.Println("Right(42).Right():", rightOpt.IsSome())
	fmt.Println("Value:", rightOpt.OrZero())

	// Right with Left value
	left := mu.Left[string, int]("error")
	rightOpt2 := left.Right()
	fmt.Println("Left(\"error\").Right():", rightOpt2.IsNone())

	// Output:
	// Right(42).Right(): true
	// Value: 42
	// Left("error").Right(): true
}

func ExampleResult_Value() {
	// Value with Ok
	ok := mu.Ok(42)
	valueOpt := ok.Value()
	fmt.Println("Ok(42).Value():", valueOpt.IsSome())
	fmt.Println("Value:", valueOpt.OrZero())

	// Value with Err
	err := mu.Err[int](errors.New("something went wrong"))
	valueOpt2 := err.Value()
	fmt.Println("Err.Value():", valueOpt2.IsNone())

	// Output:
	// Ok(42).Value(): true
	// Value: 42
	// Err.Value(): true
}

func ExampleResult_Error() {
	// Error with Err
	err := mu.Err[int](errors.New("something went wrong"))
	errorOpt := err.Error()
	fmt.Println("Err.Error():", errorOpt.IsSome())
	fmt.Println("Error message:", errorOpt.OrZero().Error())

	// Error with Ok
	ok := mu.Ok(42)
	errorOpt2 := ok.Error()
	fmt.Println("Ok(42).Error():", errorOpt2.IsNone())

	// Output:
	// Err.Error(): true
	// Error message: something went wrong
	// Ok(42).Error(): true
}