Function rb_Hash 

pub unsafe extern "C" fn rb_Hash(val: VALUE) -> VALUE

This is the logic behind Kernel#Hash. Arguments are converted by first trying #to_hash. if it failed, and the argument is either ::RUBY_Qnil or an empty array, returns an empty hash. Otherwise an exception is raised.

@param[in] val An object to convert. @exception rb_eTypeError No conversion defined. @return An instance of ::rb_cHash.

Generated by rb-sys for Ruby mri-x86_64-linux-gnu-3.2.3