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Sig fig sci notation #26

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Sig fig sci notation #26

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23 changes: 23 additions & 0 deletions macros/contexts/contextSignificantFigures.pl
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Original file line number Diff line number Diff line change
Expand Up @@ -331,6 +331,24 @@ sub ROUND {
return sprintf("%.0E", $x + $d) - $d;
}

package context::SignificantFigures::BOP::parse;
our @ISA = ("Parser::BOP");
use Data::Dumper;
sub _check {
my $self = @_;
my ($lop, $rop) = ($self->{lop}, $self->{rop});
print Dumper 'in _check';
print Dumper [$self, ref $lop, ref $rop];


}

sub _eval {
my ($self, $a, $b) = @_;
print Dumper [ref $self, $a->value, ref $b->value];
return $self->package('SignificantFigures')->new("$_[0]E$_[1]");
}

package context::SignificantFigures;

sub Init {
Expand All @@ -352,6 +370,10 @@ sub new {
$context->{precedence}{SignifcantFigures} = $context->{precedence}{special};
$context->flags->set(limits => [ -1000, 1000, 1 ]);

$context->operators->add(
'x 10^' => { class => 'context::SignificantFigures::BOP::parse'}
);

return $context;
}

Expand Down Expand Up @@ -386,4 +408,5 @@ sub perl {
return $self->context->Package('Real') . '->new(' . $value->value . ',' . $value->N . ')';
}


1;
21 changes: 21 additions & 0 deletions t/contexts/sigfig2.t
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Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
use Test2::V0 '!E', { E => 'EXISTS' };

die "PG_ROOT not found in environment.\n" unless $ENV{PG_ROOT};
do "$ENV{PG_ROOT}/t/build_PG_envir.pl";

use lib "$ENV{PG_ROOT}/lib";

loadMacros('contextSignificantFigures.pl');

use Value;
require Parser::Legacy;
import Parser::Legacy;

use Data::Dumper;

Context('SignificantFigures');

subtest 'Entering sigfig in sci notation' => sub {
my $a1 = Compute('1.0 x 10^2');
is $a1->format('E'), '1.0E+02', 'Ensure that the internal storage of 1.0 * 10^2 is correct.';
};
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