From af9a6acd53d773bbcf986a58659ac843d2864837 Mon Sep 17 00:00:00 2001
From: MadMaurice <madmaurice@zom.bi>
Date: Fri, 2 Apr 2021 03:36:26 +0200
Subject: [PATCH] Add functions zerop, min and max
---
lib/Minilisp.pm | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/lib/Minilisp.pm b/lib/Minilisp.pm
index c724f1a..166a261 100644
--- a/lib/Minilisp.pm
+++ b/lib/Minilisp.pm
@@ -105,6 +105,7 @@ my %stdctx = (
'null' => sub { my ($a) = @_; return ! defined $a; },
'evenp' => sub { my ($a) = @_; return ($a % 2 == 0); },
'oddp' => sub { my ($a) = @_; return ($a % 2 != 0); },
+ 'zerop' => sub { my ($a) = @_; return $a == 0; },
'eq' => sub { my ($a, $b) = @_; return ($a == $b); },
'ne' => sub { my ($a, $b) = @_; return ($a != $b); },
@@ -128,6 +129,24 @@ my %stdctx = (
'<' => sub { my ($a,$b) = @_; return ($a < $b); },
'>=' => sub { my ($a,$b) = @_; return ($a >= $b); },
'<=' => sub { my ($a,$b) = @_; return ($a <= $b); },
+ 'max' => sub {
+ die "max: At least 2 parameters" unless scalar(@_) >= 2;
+ my $v = shift;
+ foreach (@_)
+ {
+ $v = $_ if $v < $_;
+ }
+ return $v;
+ },
+ 'min' => sub {
+ die "min: At least 2 parameters" unless scalar(@_) >= 2;
+ my $v = shift;
+ foreach (@_)
+ {
+ $v = $_ if $v > $_;
+ }
+ return $v;
+ },
# String comparison
'string=' => sub { my ($a, $b) = @_; return ($a eq $b); },