mruby-examples/src/objects/objects.c at main · chadowo/mruby-examples · GitHub

History

83 lines (68 loc) · 2.19 KB

Raw

#include <stdio.h>

#include <mruby.h>

#include <mruby/compile.h>

#include <mruby/string.h>

#include <mruby/variable.h>

/* Equivalent to:

* class Human

* def initialize(name)

* @name = name

* end

static mrb_value mrb_human_new(mrb_state *mrb, mrb_value self) {

mrb_value name;

mrb_get_args(mrb, "S", &name);

// Set instance variable "@name" to mrb_value name

mrb_iv_set(mrb, self, mrb_intern_lit(mrb, "@name"), name);

return self;

}

/* This method returns a string greeting another human.

* Equivalent to:

* class Human

* # ...

* def greet(human)

* "Hello there #{human.name}"

* end

* NOTE: since we're using the MRuby API there's no need

* for an attribute reader, so this is not exactly like the above

* ruby code!

static mrb_value mrb_human_greet(mrb_state *mrb, mrb_value self) {

mrb_value otherHuman;

mrb_get_args(mrb, "o", &otherHuman);

// Our greeting will look as follows:

// 'Hello there #{other human name}'

// so, we'll need to know the other human's instance name

// Grab the other human's name

mrb_value otherName = mrb_iv_get(mrb, otherHuman, mrb_intern_lit(mrb, "@name"));

// We start building our greeting

mrb_value greeting = mrb_str_append(mrb, mrb_str_new_cstr(mrb, "Hello there "), otherName);

// Print the greeting

mrb_p(mrb, greeting);

return self;

}

int main(int argc, char *argv[]) {

mrb_state *mrb = mrb_open();

if (!mrb) {

fprintf(stderr, "Couldn't initialize MRuby\n");

return 1;

}

// We create our class, and define the methods for it

struct RClass *humanKlass = mrb_define_class(mrb, "Human", mrb->object_class);

mrb_define_method(mrb, humanKlass, "initialize", mrb_human_new, MRB_ARGS_REQ(1));

mrb_define_method(mrb, humanKlass, "greet", mrb_human_greet, MRB_ARGS_REQ(1));

// Create some humans and make them greet each other!

const char *code = "human1 = Human.new('John Doe')\n"

"human2 = Human.new('Jane Doe')\n"

"human1.greet(human2)\n"

"human2.greet(human1)\n";

mrb_load_string(mrb, code);

mrb_close(mrb);

return 0;

}

mruby-examples/src/objects/objects.c at main · chadowo/mruby-examples · GitHub

Expand file tree

Breadcrumbs

objects.c

Latest commit

History

Breadcrumbs

objects.c

File metadata and controls