- Added support for multiple dispatch.

Much better and faster than ever before!!!

- Major change: all function/method parameters are required by default, unless a default value is provided.

Example:
	func foo(a, b) {

	}
	foo(42)			# error: foo() requires two arguments

- Optimized the prefix and postfix `++` and `--` operators.
- Overall performance improvements.

MANIFEST

@@ -135,6 +135,7 @@ lib/Sidef/Types/Regex/Regex.pod
 lib/Sidef/Types/String/String.pm
 lib/Sidef/Types/String/String.pod
 lib/Sidef/Variable/ClassAttr.pm
+lib/Sidef/Variable/ClassAttr.pod
 lib/Sidef/Variable/ClassInit.pm
 lib/Sidef/Variable/ClassInit.pod
 lib/Sidef/Variable/Const.pm
@@ -266,6 +267,7 @@ scripts/langton_s_ant_2.sf
 scripts/linear_congruential_generator.sf
 scripts/mandelbrot_set.sf
 scripts/matrix_multiplication.sf
+scripts/multiple_dispatch.sf
 scripts/mutual_recursion.sf
 scripts/nth_root.sf
 scripts/permutations_iter.sf
@@ -368,6 +370,7 @@ scripts/RosettaCode/convert_decimal_number_to_rational.sf
 scripts/RosettaCode/copy_a_string.sf
 scripts/RosettaCode/count_in_factors.sf
 scripts/RosettaCode/count_occurrences_of_a_substring.sf
+scripts/RosettaCode/create_an_html_table.sf
 scripts/RosettaCode/date_format.sf
 scripts/RosettaCode/delete_a_file.sf
 scripts/RosettaCode/determine_if_a_string_is_numeric.sf
@@ -381,7 +384,6 @@ scripts/RosettaCode/enumerations.sf
 scripts/RosettaCode/enumerations_1.sf
 scripts/RosettaCode/equilibrium_index.sf
 scripts/RosettaCode/euler_method.sf
-scripts/RosettaCode/evaluate_binomial_coefficients.sf
 scripts/RosettaCode/factorial.sf
 scripts/RosettaCode/fibonacci_n-step_number_sequence.sf
 scripts/RosettaCode/fibonacci_sequence.sf
@@ -822,6 +824,7 @@ t/00-load.t
 t/01-parser.t
 t/manifest.t
 t/pod.t
+TODO
 utils/auto_perltidy.sh
 utils/bak_cleaner.sh
 utils/Concepts/sidef_concept.jl

TODO

@@ -0,0 +1,19 @@
+TODO list for Sidef
+
+General:
+    * improve the OO system
+    * reduce the usage of the `overload` pragma
+
+Method/function parameters:
+    * add the `where` trait:
+
+        func foo(a where { _ > 0 }) {       # works only with positive numbers
+            say a
+        }
+        foo(42)     # ok
+        foo(-1)     # must be an error
+
+Method/functions:
+    * implement the `is export` trait for methods (maybe)
+    * improve the user-defined auto-conversion methods (such as: to_s)
+      `- maybe, rename `to_s` to `to_str`?

lib/Sidef.pm

@@ -18,6 +18,14 @@ package Sidef {
     sub new {
         bless {}, __PACKAGE__;
     }
+
+    sub unpack_args {
+        map {
+            ref($_) && eval { $_->can('to_s') }
+              ? $_->to_s
+              : $_
+        } @_;
+    }
 };
 
 #

lib/Sidef/Convert/Convert.pm

@@ -65,6 +65,8 @@ package Sidef::Convert::Convert {
         Sidef::Types::Bool::Bool->new($_[0]->get_value);
     }
 
+    *to_b = \&to_bool;
+
     sub to_regex {
         Sidef::Types::Regex::Regex->new($_[0]->get_value);
     }