Writing a Gwion plugin

THIS IS OUTDATED. please look at the source code in src/lib/ instead

• [getting started]

Getting started

use the script

headers

#include "vm.h"
#include "instr.h"
#include "import.h

Class

Define the type:

struct Type_ t_mytype = { "MyType", SZ_INT, &t_object};

every type extending t_object should have SZ_INT

Handling Constructors and Destructors

CTOR

CTOR(mytype_ctor) {
  /* constructor code here */
}

DTOR

DTOR(mytype_dtor) {
  /* destructor code here */
}

those macros provide two variables:

• o: the M_Object for the (con/des)tructor
• shred: the VM_Shred for the (con/des)tructor

CHECK_BB(import_class_begin(env, &t_mytpe, env->global_nspc, mytype_ctor, mytype_dtor))

variable

declare a m_int. coding convention require

• a leading _o
• a following type

m_int o_mytype_myvaroffset;

function

/* declare a member function */
MFUN(mytype_memberfunction) {
  /* code here */
}

SFUN(mtype_staticfunction) {
  /* code here */
}

operator

Import function