Question

我正试图找到一种方法来使用[正则表达式]作为[变量名]或[函数名]。是否有任何编程或脚本语言提供此功能？

我想要的功能示例（使用类似Java的伪代码）：

int <<(my|a|an)(number|Integer)>> = 10;
//this variable has a regular expression as a name

function <<((print|write)(Stuff|Things|Words))>>(int myInt){
//this function has a regular expression as a name
     System.out.println(myInt);
}

printStuff(myInt); //should have the same effect as the next line
writeWords(anInteger); //should have the same effect as the previous line

Answer 1

在Perl中，您可以使用AUTOLOAD为函数执行此类操作。

Example：

my @refun = (
        [qr/(print|write)(Stuff|Things|Words)/ => sub { print "printStuff(@_)\n"; }],
        [qr/fo+(?:ba+r)?/ => sub { print "foobar(@_)\n"; }],
        );

our $AUTOLOAD;
sub AUTOLOAD{
        for(@refun){
                my ($re, $sub) = @$_;
                goto &$sub if $AUTOLOAD =~ /$re/;
        }

        my ($package, $filename, $line) = caller;
        die "Undefined subroutine &$AUTOLOAD called at $filename line $line.\n";
}


printStuff(10);
writeWords(10);
foo();
fooooooooooooooobar(1,2,3);

输出：

printStuff(10)
printStuff(10)
foobar()
foobar(1 2 3)

不确定变量，但也可能是这样。

使用正则表达式作为函数或变量的名称

1 个答案: