boolean.pmc

/*
Copyright (C) 2001-2007, Parrot Foundation.
$Id$

=head1 NAME

src/pmc/boolean.pmc - Boolean PMC

=head1 DESCRIPTION

This class implements a boolean value variable.

Albeit the C<Boolean PMC> is derived from the C<Integer PMC>,
it doesn't morph to other types. Only its value is changed.

=head2 Methods

=over 4

=cut

*/

/* HEADERIZER HFILE: none */

pmclass Boolean extends Integer provides boolean provides scalar auto_attrs {

/*

=item C<void init_pmc(PMC *value)>

Initialises SELF value according to the boolean value of the passed PMC.

=cut

*/
    VTABLE void init_pmc(PMC *value) {
        if (!PMC_IS_NULL(value)) {
            SELF.set_bool(VTABLE_get_bool(INTERP, value));
        }
        else {
            SELF.set_bool(0);
        }
    }
/*

=item C<STRING *get_string()>

Return "1" or "0".

=cut

*/
    VTABLE STRING *get_string() {
        return SUPER();
    }


/*

=item C<void set_integer_native(INTVAL value)>

=item C<void set_bool(INTVAL value)>

=item C<void set_pmc(PMC *value)>

=cut

*/
    VTABLE void set_integer_native(INTVAL value) {
        SUPER((value != 0));
    }


    VTABLE void set_bool(INTVAL value) {
        SELF.set_integer_native(value);
    }

/*

=item C<void set_number_native(FLOATVAL value)>

Sets the value to C<value> evaluated in a boolean context.

=cut

*/

    VTABLE void set_number_native(FLOATVAL value) {
        SELF.set_bool(!FLOAT_IS_ZERO(value));
    }

/*

=item C<void set_string_native(STRING *value)>

Sets the value to C<*value> evaluated in a boolean context.

=cut

*/

    VTABLE void set_string_native(STRING *value) {
        SELF.set_bool(Parrot_str_boolean(INTERP, value));
    }
}

/*

=back

=cut

*/

/*
 * Local variables:
 *   c-file-style: "parrot"
 * End:
 * vim: expandtab shiftwidth=4:
 */