这是代码：
sub function($&) {
my $param1 = shift;
my $code = shift;
# do something with $param1 and $code
}
如果我试着像这样打电话：
function("whatever") {
print "i'm inside the coderef\n";
}
我在x.pl第5行得到MyPackage :: function的参数不足,接近“”无论“{”.如何在不必在代码块前添加sub的情况下调用它？
解决方法
首先放入coderef参数：
sub function (&$) {
my $code = shift;
my $param1 = shift;
# do something with $param1 and $code
}
function { print "i'm inside the coderef\n" } "whatever";
请参阅perlsub手册页,其中部分内容如下：
An “&” requires an anonymous subroutine,which,if passed as the first argument,does not require the “sub” keyword or a subsequent comma.