main.go

package main

import "fmt"
import "math/big"

type BigInt big.Int

func one() *big.Int {
    return big.NewInt(1)
}

func zero() *big.Int {
    return big.NewInt(0)
}

func add(a *big.Int, b *big.Int) *big.Int {
    return zero().Add(a, b)
}

func Transaction(handle func() interface {}) interface {} {
    defer func() {
        if r := recover(); r != nil {
            fmt.Println("Recovered in f", r);
        }
    }()
    return handle();
}

func main() {
    var a *big.Int;
    var b *big.Int;
    
    Transaction(func() interface {} {
        // NOTE: 这里会 Panic，但是线程不会崩溃
        c := add(a, b);
        fmt.Println("%s", c.String());
        return nil;
    });
    
    // NOTE: 整个线程不会崩溃。
    fmt.Println("DONE.");
}