为什么文件句柄不需要Perl中的sigil？(Why doesn't a filehandle need a sigil in Perl?)

 在Perl中，filehandle是一种数据类型，我期望这种类型的变量具有某种类型的sigil前缀。 但是，下面的代码（第二次打开）表明情况并非如此 
 
open my $fileHandle, '>', "out.txt";
open FH, '>', "out2.txt";
 
 我发现第二种形式令人困惑/不一致。 允许第二种形式的原因是什么？ 

In Perl, filehandle is a data type, and I'd expect a variable of such type has some kind of sigil prefix. However, the following code (2nd open) shows that it's not the case
 
open my $fileHandle, '>', "out.txt";
open FH, '>', "out2.txt";
 
I found the 2nd form confusing/inconsistent. What is the reason for allowing the 2nd form?

原文：https://stackoverflow.com/questions/40831471