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Summary of Changes

This pull request introduces the rand(Range) method and unifies the implementations of Random#rand and Kernel#rand. It modifies mrbgems/mruby-random/src/random.c to include range handling and updates mrbgems/mruby-random/test/random.rb to add tests for Kernel#rand.

Highlights

• Range Support: Adds support for rand(Range) to generate random numbers within a specified range.
• Implementation Unification: Unifies the implementations of Random#rand and Kernel#rand to use a common internal function.
• Argument Handling: Improves argument handling for rand to support floats, integers, and ranges.

Changelog

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• mrbgems/mruby-random/src/random.c
  • Added #include <mruby/range.h> to support range operations.
  • Implemented rand_range_int to generate random integers within a range.
  • Implemented rand_range_float to generate random floats within a range.
  • Implemented random_range to handle range arguments for rand.
  • Implemented random_rand_impl to unify argument handling for Random#rand and Kernel#rand.
  • Modified random_m_rand to use random_rand_impl.
  • Modified random_f_rand to use random_rand_impl.
  • Removed the get_opt function.
• mrbgems/mruby-random/test/random.rb
  • Added tests for Kernel#rand to verify range and numeric argument handling.

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---

A random number's call,
In a range, it stands tall,
From zero to one,
A new seed has begun,
In mruby, embracing all.

Footnotes

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		return random_range(mrb, t, arg);
		}
		mrb_raise(mrb, E_ARGUMENT_ERROR, "");

…does