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Cello High Level C

Methods

type_of

var type_of(var self);

Returns the Type of an object self.

instance

var instance(var self, var cls);
var type_instance(var type, var cls);

Returns the instance of class cls implemented by object self or type type. If class is not implemented then returns NULL.

implements

bool implements(var self, var cls);
bool type_implements(var type, var cls);

Returns if the object self or type type implements the class cls.

method

#define method(X, C, M, ...)
#define type_method(T, C, M, ...)

Returns the result of the call to method M of class C for object Xor type T. If class is not implemented then an error is thrown.

implements_method

#define implements_method(X, C, M)
#define type_implements_method(T, C, M)

Returns if the type T or object X implements the method M of class C.

Examples

Usage

var t = type_of($I(5));
show(t); /* Int */

show($I(type_implements(t, New)));  /* 1 */
show($I(type_implements(t, Cmp)));  /* 1 */
show($I(type_implements(t, Hash))); /* 1 */

show($I(type_method(t, Cmp, cmp, $I(5), $I(6))));

Type

Metadata Object

The Type type is one of the most important types in Cello. It is the object which specifies the meta-data associated with a particular object. Most importantly this says what classes an object implements and what their instances are.

One can get the type of an object using the type_of function.

To see if an object implements a class implements can be used. To call a member of a class with an object method can be used.

To see if a type implements a class type_implements can be used. To call a member of a class, implemented type_method can be used.

Derives

Implements

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