为什么尝试捕获需要花括号 [英] Why does Try-Catch require curly braces

问题描述

只是好奇：为什么是尝试在C＃抓语法（Java也？）硬编码为多个语句？为什么不语允许：

Just curious: Why is the syntax for try catch in C# (Java also?) hard coded for multiple statements? Why doesn't the language allow:

int i;
string s = DateTime.Now.Seconds % 2 == 1 ? "1" : "not 1";
try
   i = int.Parse(s);
catch
   i = 0;

这个例子仅仅是为了微不足道的目的。我知道有 int.TryParse < 。/ A>

推荐答案

考虑的是，真的有在这里打球三个（或更多）的代码块：

Consider the fact that there are really three (or more) code blocks in play here:

try {}
catch (myexcption)
{}
catch (myotherexception)
{}
finally
{}

记住，这些都是在更大范围内的范围，而不是被逮捕的非法potentually进一步赶上堆栈中的例外。

Keep in mind that these are in the scope of a larger context and the exceptions not caught are potentually caught further up the stack.

请注意，这是基本相同的事情为一类结构，它也有{ }结构

Note that this is basically the same thing as a class construct that also has the {} structure.

例如说你可能有：

try
try
if (iAmnotsane)
beatMe(please);
catch (Exception myexception)
catch (myotherexception)
logerror("howdy")
finally

现在确实是第二个catch属于第一或第二试试？怎么样最后？所以你看到了可选/多部分构成的要求。

NOW does that second catch belong to the first or the second try? What about the finally? SO you see the optional/multiple portions make the requirement.

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