Function mrb_define_const

pub unsafe extern "C" fn mrb_define_const(
    mrb: *mut mrb_state,
    cla: *mut RClass,
    name: *const c_char,
    val: mrb_value,
)

Defines a constant.

Example:

     class ExampleClass
       AGE = 22
     end
     // C style
     #include <stdio.h>
     #include <mruby.h>

     void
     mrb_example_gem_init(mrb_state* mrb){
       mrb_define_const(mrb, mrb->kernel_module, "AGE", mrb_fixnum_value(22));
     }

     mrb_value
     mrb_example_gem_final(mrb_state* mrb){
     }

@param mrb The MRuby state reference. @param cla A class or module the constant is defined in. @param name The name of the constant being defined. @param val The value for the constant.