Default value?

Ruby
1

i’m writting a C ext to Ruby.
i want the User from ruby being able to pass 1 or 2 arg(s) to this ruby,
without any Ruby wraper.

i know that in standard C their is no way to have a function with
default value.

since i’m not really writting “standard C” rather than a C ext to Rubt,
is their a workaround for that ?

for example :
rb_define_method(cRAliasRecord, “my_function”, m_my_function_1_arg,
1);
rb_define_method(cRAliasRecord, “my_function”, m_my_function_2_args,
2);

or something similar…

2

Une bévue wrote:

for example :
rb_define_method(cRAliasRecord, “my_function”, m_my_function_1_arg,
1);
rb_define_method(cRAliasRecord, “my_function”, m_my_function_2_args,
2);

or something similar…

This question came up just recently:

http://www.google.com/search?q=site%3Ablade.nagaokaut.ac.jp+extension+default+argument

http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/211001

3

Hi,

At Sun, 3 Sep 2006 20:05:39 +0900,
Une bévue wrote in [ruby-talk:212421]:

since i’m not really writting “standard C” rather than a C ext to Rubt,
is their a workaround for that ?

Define the method as -1 arity, and use rb_scan_args().
There are a lot of examples in the source.

4

[email protected] wrote:

Define the method as -1 arity, and use rb_scan_args().
There are a lot of examples in the source.

thanks a lot !

5

Robin S. [email protected] wrote:

This question came up just recently:

[…]

thanks a lot !