Perl6:在其他模块中使用模块

时间:2017-11-09 14:53:29

标签: module filepath perl6

我有4个文件。

  • C:\ perlCode2 \ start.pl6
  • C:\ perlCode2 \ file0.pm6
  • C:\ perlCode2 \ folder1中\ file1.pm6
  • C:\ perlCode2 \文件夹2 \ file2.pm6

start.pl6用于运行我的程序。 3个模块文件包含或生成最终由start.pl6使用的数据。我使用atom.io来运行代码。

以下是代码:

start.pl6:

use v6;
use lib ".";
use file0;
use lib "folder1";
use file1;
use lib "folder2";
use file2;

say 'start';
my $file0 = file0.new();
say $file0.mystr;
my $file1 = file1.new();
say $file1.mystr;
my $file2 = file2.new();
say $file2.mystr;
say 'end';

file0.pm6:

class file0 is export {
  has Str $.mystr = "file 0";

  submethod BUILD() {
    say "hello file 0";
  }
}

file1.pm6:

class file1 is export {
  has Str $.mystr = "file 1";
}

file2.pm6:

class file2 is export {
  has Str $.mystr = "file 2";
}

输出:

start
hello file 0
file 0
file 1
file 2
end
[Finished in 0.51s]

我不想在start.pl6中创建所有3个模块文件的实例,而是想在file1中创建file2的实例,在file0中创建file1的实例。这样我只需要在start.pl6中创建一个file0实例来查看相同的输出;

以下是我的想法:

file1.pm6:

use lib "../folder2";
use "file2.pl6"; 

class file1 is export {
  has Str $.mystr = "file 1";

  submethod BUILD() {
    my $file2 = file2.new();
    $!mystr = $!mystr ~ "\n" ~ $file2.mystr; 
        # I want to instantiate file2 inside the constructor, 
        # so I can be sure the line
        # $!mystr = $!mystr ~ "\n" ~ $file2.mystr; 
        # takes effect before i call any of file0's methods;
  }
}

file0.pm6:

use lib "folder1";
use "file1.pl6"; 

class file0 is export {
  has Str $.mystr = "file 0";

  submethod BUILD() {
    say "hello file 0";
    my $file1 = file1.new();
    $!mystr = $!mystr ~ "\n" ~ $file1.mystr; 
  }
}

在file0中,行 使用lib" folder1&#34 ;; 使用" file1.pl6&#34 ;;  产生此错误:

===SORRY!=== Error while compiling C:\perlCode2\file0.pm6 (file0)
'use lib' may not be pre-compiled
at C:\perlCode2\file0.pm6 (file0):2
------> use lib "folder1/file1.pl6"<HERE>;
[Finished in 0.584s]

我是file1,这一行 使用lib&#34; ../ folder2&#34 ;; 使用&#34; file2&#34 ;; 不起作用,但也没有给出错误。我得到输出: [完成0.31秒]

最后,文件start.pl6应该如下所示产生输出:

start.pl6:

use v6;
use lib ".";
use file0;

say 'start';
my $file0 = file0.new();
say $file0.mystr;
say 'end';

输出:

start
hello file 0
file 0
file 1
file 2
end

2 个答案:

答案 0 :(得分:2)

你要做的事对我来说毫无意义。您似乎正在将这些模块随意放入文件夹中。

如果这些模块的名称确实有意义,我可以如何构建它。

C:\perlCode2\start.pl6
C:\perlCode2\lib\file0.pm6
C:\perlCode2\lib\folder1\file1.pm6
C:\perlCode2\lib\folder2\file2.pm6

start.pl6

use v6;

END say "[Finished in {(now - $*INIT-INSTANT).fmt("%0.2fs")}";

use lib 'lib';
use file0;

say 'start';
my $file0 = file0.new;
say $file0.mystr;
say 'end';

LIB \ file0.pm6

use folder1::file1;

class file0 is export {
  has Str $.mystr = "file 0";

  submethod TWEAK() {
    say "hello file 0";
    $!mystr ~= "\n" ~ folder1::file1.new.mystr; 
  }
}

LIB \ folder1中\ file1.pm6

use folder2::file2;

class folder1::file1 is export {
  has Str $.mystr = "file 1";

  submethod TWEAK() {
    $!mystr ~= "\n" ~ folder2::file2.new.mystr;
  }
}

LIB \文件夹2 \ file2.pm6

class folder2::file2 is export {
  has Str $.mystr = "file 2";
}

答案 1 :(得分:1)

use lib "folder2/file2.pl6";

这不符合你的想法。 use lib需要一个目录,其中Perl应该寻找模块,而不是某些脚本的路径。

如果您的My.pm6位于./lib(相对于当前工作目录),那么

use lib "lib";
use My;

诀窍。您也可以使用绝对路径

use lib "~/projects/perl6/MyProject/lib";
use My;

请参阅lib