Golang日志函数返回参数

Question

I would like to log a function's return values. The "smartest" thing I could come up with is wrapping my actual function body in a closure.

func foo(a int, b int) (int, error) {
    c, err := func (a int, b int) (int, error) {
        //...
        return c, err
    }(a, b)

    fmt.Printf("%v %v %v %v", a, b, c, err)

    return c, err
}

Is there a way to accomplish this with less boilerplate?

Answer 1

Maybe I misunderstood your question, but what about:

package main

import (
    "log"
)

func foo(a, b int) (c int, err error) {
    defer func() {log.Printf("%v %v %v %v", a, b, c, err)}()
    c = a + b
    return c, nil
}


func main() {
    foo(1, 3)
}