feat: conditional expression

[m0t9]

Conditional expression implementation in Go language. Allows conditional variables and constants short-circuited evaluation

Example

package main

import (
	"fmt"
)

const num int = 10
const s string = if num > 0 { "positive" } else { "negative" }

type Person struct {
	status string
}

func NewPerson(age int) Person {
	return Person{
		status: if age >= 18 { "adult" } else { "child" },
	}
}

func main() {
	p := NewPerson(12)
	fmt.Println(p)
}

$ GOEXPERIMENT=condexpr ./go run main.go

child