异常: 传递流程

基于上述注释观察并理解异常传递流程:

<?php

function g1() {
    throw new \Exception();
    yield;
}
// a2 -> b2 ->
(new AsyncTask(g1()))->begin();


function g2() {
    yield;
    throw new \Exception();
}
// a2 (-> a4 -> a2) -> b2 -> b2 ->
(new AsyncTask(g2()))->begin();


function g3() {
    yield;
    throw new \Exception();
}
// a2 (-> a4 -> a2) -> b2 -> b2 ->
(new AsyncTask(g3()))->begin();


function g4() {
    yield;
    yield;
    throw new \Exception();
}
// a2 (-> a4 -> a2) (-> a4 -> a2) -> b2 -> b2 -> b2 ->
(new AsyncTask(g4()))->begin();


function g5() {
    throw new \Exception();
    /** @noinspection PhpUnreachableStatementInspection */
    yield;
}
function g7() {
    yield g5();
}
// (a2 -> a3) -> a2 (-> b2 -> b1 -> c) -> b2 ->
(new AsyncTask(g7()))->begin();


function g6() {
    yield;
    throw new \Exception();
}
function g8() {
    yield g6();
}
// (a2 -> a3) -> a2 -> a4 -> a2 -> b2 -> b2 -> b1 -> c -> b2 ->
(new AsyncTask(g8()))->begin();


function g9() {
    try {
        yield g5();
    } catch (\Exception $ex) {

    }
}
// a2 -> a3 -> a2 -> b2 -> b1 -> c ->
(new AsyncTask(g9()))->begin();
powered by Gitbook 该教程制作时间: 2017-04-12 13:42:37