Re: RFC: bigint et. al exporting PI method? [PATCH]

[perl5.git] / lib / bigrat.pm

diff --git a/lib/bigrat.pm b/lib/bigrat.pm
index a4de1d6..e185d4f 100644 (file)
--- a/lib/bigrat.pm
+++ b/lib/bigrat.pm
@@ -4,7 +4,7 @@ use 5.006002;
 $VERSION = '0.22';
 require Exporter;
 @ISA           = qw( bigint );
 $VERSION = '0.22';
 require Exporter;
 @ISA           = qw( bigint );

-@EXPORT_OK     = qw( ); 
+@EXPORT_OK     = qw( PI e ); 

 @EXPORT                = qw( inf NaN ); 
 
 use strict;
 @EXPORT                = qw( inf NaN ); 
 
 use strict;


@@ -158,7 +158,7 @@ sub import
       splice @a, $j, 1; $j --;
       $oct = \&bigint::_oct_global;
       }
       splice @a, $j, 1; $j --;
       $oct = \&bigint::_oct_global;
       }

-    else
+    elsif ($_[$i] !~ /^(PI|e)\z/)

       {
       die ("unknown option $_[$i]");
       }
       {
       die ("unknown option $_[$i]");
       }


@@ -226,6 +226,9 @@ sub import
   }
   }
 
   }
   }
 

+sub PI { local $Math::BigFloat::upgrade = undef; Math::BigFloat::bpi(@_); }
+sub e  { local $Math::BigFloat::upgrade = undef; Math::BigFloat->bone()->bexp(@_); }
+

 1;
 
 __END__
 1;
 
 __END__


@@ -329,6 +332,14 @@ handle bareword C<inf> properly.
 A shortcut to return Math::BigInt->bnan(). Useful because Perl does not always
 handle bareword C<NaN> properly.
 
 A shortcut to return Math::BigInt->bnan(). Useful because Perl does not always
 handle bareword C<NaN> properly.
 

+=item e()
+
+Returns Euler's number C<e>, aka exp(1), to the given number of digits.
+
+=item PI()
+
+Returns PI to the given number of digits.
+

 =item upgrade()
 
 Return the class that numbers are upgraded to, is in fact returning
 =item upgrade()
 
 Return the class that numbers are upgraded to, is in fact returning