- bool is_null()
t.is_null() is the
same as t.unwrap() == PlTerm::null- bool not_null()
t.not_null() is the
same as t.unwrap() != PlTerm::null- bool reset()
t.reset() is the same
as t.unwrap() = PlTerm::null- bool reset(term_t)
t.reset(x) is the same as t.unwrap() = x- int PlTerm::type()
- Yields the actual type of the term as PL_term_type(). Return
values are
PL_VARIABLE, PL_FLOAT, PL_INTEGER,
PL_ATOM, PL_STRING or PL_TERM
- std::string as_string(PlEncoding
enc=EncLocale)
- Returns the string representation of the atom. See PlAtom::as_string()
for an explanation of the encodings and caveats about std::string::c_str().
- std::string atomic_as_string(PlEncoding
enc=EncLocale)
- As PlTerm::as_string(),
but throws an exception if the term isn't atomic (see atomic/1).
- std::string atom_or_string_as_string(PlEncoding
enc=EncLocale)
- As PlTerm::as_string(),
but throws an exception if the term isn't an atom or a string.
To avoid very confusing combinations of constructors and therefore
possible undesirable effects a number of subclasses of PlTerm
have been defined that provide constructors for creating special Prolog
terms. These subclasses are defined below.