dpp_forms.md

Forms

• Functions in programming are blocks of precisely defined and chronologically ordered instructions that are executed when the function is called. In D++, those are renamed to forms.

• Forms may be native forms, user forms and hook forms.

---

Native forms

• Native forms are those whose are defined in an interpreter component and are useable only if the component is imported. You may call native forms by specifying the component name.

using.console;

console.println("Hello World");

So you are using the using procedure on a console component to use the println form - brilliant!

---

User forms

• User forms are forms whose are defined by the person who wrote the code. You may declare an user form using:

void*form.formname;
{;
	console.println("my first user form");
};

So now you've made an user form. Code between the curly braces is called a form code block. It may contain a native form call or a variable, constant or iterator declaration, and even an inline form initialization.

You also may return values.

str*form.formname;
{;
	console.println("my first user form");
	return,"this was returned";
};

Then you can use this user form as an argument in a native form.

str*form.formname;
{;
	console.println("my first user form");
	return,"this was returned";
};

console.println(formname);

To call an user form, use:

user.formname;

---

Using vars and constants as arguments

• You may also use variables and constants as arguments in native functions.

const*new.str,CONST_NAME="constant worked";

console.println(CONST_NAME);

---

Hook forms

• You can hook already existing forms using hook forms.

int*form.functobehooked;
{;
	console.println("HOOKED");
	return,1;
};

@hook;
int*form.functobehooked;
{;
	console.println("HOOKED 1");
	return.int,1;
};

@hook;
int*form.functobehooked;
{;
	console.println("HOOKED 2");
	return.int,1;
};

user.functobehooked;