path: root/doc/ref/api-undocumented.texi

This file gathers entries that have been automatically generated from
docstrings in libguile.  They are not included in the manual, however,
for various reasons, mostly because they have been deprecated.  They
are here in this file to give docstring.el a chance to update them
automatically.

- GOOPS is documented in its own manual.



@deffn {Scheme Procedure} substring-move-right!
implemented by the C function "scm_substring_move_x"
@end deffn

@deffn {Scheme Procedure} substring-move-left!
implemented by the C function "scm_substring_move_x"
@end deffn

@deffn {Scheme Procedure} gentemp [prefix [obarray]]
@deffnx {C Function} scm_gentemp (prefix, obarray)
Create a new symbol with a name unique in an obarray.
The name is constructed from an optional string @var{prefix}
and a counter value.  The default prefix is @code{t}.  The
@var{obarray} is specified as a second optional argument.
Default is the system obarray where all normal symbols are
interned.  The counter is increased by 1 at each
call.  There is no provision for resetting the counter.
@end deffn

@deffn {Scheme Procedure} symbol-set! o s v
@deffnx {C Function} scm_symbol_set_x (o, s, v)
Find the symbol in @var{obarray} whose name is @var{string}, and rebind
it to @var{value}.  An error is signalled if @var{string} is not present
in @var{obarray}.
@end deffn

@deffn {Scheme Procedure} symbol-bound? o s
@deffnx {C Function} scm_symbol_bound_p (o, s)
Return @code{#t} if @var{obarray} contains a symbol with name
@var{string} bound to a defined value.  This differs from
@var{symbol-interned?} in that the mere mention of a symbol
usually causes it to be interned; @code{symbol-bound?}
determines whether a symbol has been given any meaningful
value.
@end deffn

@deffn {Scheme Procedure} symbol-binding o s
@deffnx {C Function} scm_symbol_binding (o, s)
Look up in @var{obarray} the symbol whose name is @var{string}, and
return the value to which it is bound.  If @var{obarray} is @code{#f},
use the global symbol table.  If @var{string} is not interned in
@var{obarray}, an error is signalled.
@end deffn

@deffn {Scheme Procedure} unintern-symbol o s
@deffnx {C Function} scm_unintern_symbol (o, s)
Remove the symbol with name @var{string} from @var{obarray}.  This
function returns @code{#t} if the symbol was present and @code{#f}
otherwise.
@end deffn

@deffn {Scheme Procedure} intern-symbol o s
@deffnx {C Function} scm_intern_symbol (o, s)
Add a new symbol to @var{obarray} with name @var{string}, bound to an
unspecified initial value.  The symbol table is not modified if a symbol
with this name is already present.
@end deffn

@deffn {Scheme Procedure} string->obarray-symbol o s [softp]
@deffnx {C Function} scm_string_to_obarray_symbol (o, s, softp)
Intern a new symbol in @var{obarray}, a symbol table, with name
@var{string}.

If @var{obarray} is @code{#f}, use the default system symbol table.  If
@var{obarray} is @code{#t}, the symbol should not be interned in any
symbol table; merely return the pair (@var{symbol}
. @var{#<undefined>}).

The @var{soft?} argument determines whether new symbol table entries
should be created when the specified symbol is not already present in
@var{obarray}.  If @var{soft?} is specified and is a true value, then
new entries should not be added for symbols not already present in the
table; instead, simply return @code{#f}.
@end deffn

@deffn {Scheme Procedure} read-and-eval! [port]
@deffnx {C Function} scm_read_and_eval_x (port)
Read a form from @var{port} (standard input by default), and evaluate it
(memoizing it in the process) in the top-level environment.  If no data
is left to be read from @var{port}, an @code{end-of-file} error is
signalled.
@end deffn

@deffn {Scheme Procedure} sloppy-member x lst
@deffnx {C Function} scm_sloppy_member (x, lst)
This procedure behaves like @code{member}, but does no type or error checking.
Its use is recommended only in writing Guile internals,
not for high-level Scheme programs.
@end deffn

@deffn {Scheme Procedure} sloppy-memv x lst
@deffnx {C Function} scm_sloppy_memv (x, lst)
This procedure behaves like @code{memv}, but does no type or error checking.
Its use is recommended only in writing Guile internals,
not for high-level Scheme programs.
@end deffn

@deffn {Scheme Procedure} sloppy-memq x lst
@deffnx {C Function} scm_sloppy_memq (x, lst)
This procedure behaves like @code{memq}, but does no type or error checking.
Its use is recommended only in writing Guile internals,
not for high-level Scheme programs.
@end deffn

@deffn {Scheme Procedure} builtin-variable name
@deffnx {C Function} scm_builtin_variable (name)
Do not use this function.
@end deffn

@deffn {Scheme Procedure} variable-set-name-hint! var hint
@deffnx {C Function} scm_variable_set_name_hint (var, hint)
Do not use this function.
@end deffn

@deffn {Scheme Procedure} close-all-ports-except . ports
@deffnx {C Function} scm_close_all_ports_except (ports)
[DEPRECATED] Close all open file ports used by the interpreter
except for those supplied as arguments.  This procedure
was intended to be used before an exec call to close file descriptors
which are not needed in the new process.  However it has the
undesirable side effect of flushing buffers, so it's deprecated.
Use port-for-each instead.
@end deffn

@deffn {Scheme Procedure} c-clear-registered-modules
@deffnx {C Function} scm_clear_registered_modules ()
Destroy the list of modules registered with the current Guile process.
The return value is unspecified.  @strong{Warning:} this function does
not actually unlink or deallocate these modules, but only destroys the
records of which modules have been loaded.  It should therefore be used
only by module bookkeeping operations.
@end deffn

@deffn {Scheme Procedure} c-registered-modules
@deffnx {C Function} scm_registered_modules ()
Return a list of the object code modules that have been imported into
the current Guile process.  Each element of the list is a pair whose
car is the name of the module, and whose cdr is the function handle
for that module's initializer function.  The name is the string that
has been passed to scm_register_module_xxx.
@end deffn

@deffn {Scheme Procedure} module-import-interface module sym
@deffnx {C Function} scm_module_import_interface (module, sym)
Return the module or interface from which @var{sym} is imported in @var{module}.  If @var{sym} is not imported (i.e., it is not defined in @var{module} or it is a module-local binding instead of an imported one), then @code{#f} is returned.
@end deffn


@deffn {Scheme Procedure} self-evaluating? obj
@deffnx {C Function} scm_self_evaluating_p (obj)
Return #t for objects which Guile considers self-evaluating
@end deffn

@deffn {Scheme Procedure} unmemoize-expr m
@deffnx {C Function} scm_i_unmemoize_expr (m)
Unmemoize the memoized expression @var{m},
@end deffn

@deffn {Scheme Procedure} weak-key-alist-vector? obj
@deffnx {Scheme Procedure} weak-value-alist-vector? obj
@deffnx {Scheme Procedure} doubly-weak-alist-vector? obj
@deffnx {C Function} scm_weak_key_alist_vector_p (obj)
Return @code{#t} if @var{obj} is the specified weak hash
table. Note that a doubly weak hash table is neither a weak key
nor a weak value hash table.
@end deffn

@deffn {Scheme Procedure} make-weak-key-alist-vector [size]
@deffnx {Scheme Procedure} make-weak-value-alist-vector size
@deffnx {Scheme Procedure} make-doubly-weak-alist-vector size
@deffnx {C Function} scm_make_weak_key_alist_vector (size)
Return a weak hash table with @var{size} buckets. As with any
hash table, choosing a good size for the table requires some
caution.

You can modify weak hash tables in exactly the same way you
would modify regular hash tables. (@pxref{Hash Tables})
@end deffn

@deffn {Scheme Procedure} include-deprecated-features
Return @code{#t} if deprecated features should be included in public
interfaces, or @code{#f} otherwise.
@end deffn

@deffn {Scheme Procedure} issue-deprecation-warning . msgs
Output @var{msgs} to @code{(current-error-port)} when this
is the first call to @code{issue-deprecation-warning} with
this specific @var{msg}.  Do nothing otherwise.
The argument @var{msgs} should be a list of strings;
they are printed in turn, each one followed by a newline.
@end deffn

@deffn {Scheme Procedure} valid-object-procedure? proc
@deffnx {C Function} scm_valid_object_procedure_p (proc)
Return @code{#t} ff @var{proc} is a procedure that can be used with @code{set-object-procedure}.  It is always valid to use a closure constructed by @code{lambda}.
@end deffn

@deffn {Scheme Procedure} %get-pre-modules-obarray
@deffnx {C Function} scm_get_pre_modules_obarray ()
Return the obarray that is used for all new bindings before the module system is booted.  The first call to @code{set-current-module} will boot the module system.
@end deffn

@deffn {Scheme Procedure} standard-interface-eval-closure module
@deffnx {C Function} scm_standard_interface_eval_closure (module)
Return a interface eval closure for the module @var{module}. Such a closure does not allow new bindings to be added.
@end deffn

@deffn {Scheme Procedure} env-module env
@deffnx {C Function} scm_env_module (env)
Return the module of @var{ENV}, a lexical environment.
@end deffn

@deffn {Scheme Procedure} single-active-thread?
implemented by the C function "scm_single_thread_p"
@end deffn

@deffn {Scheme Procedure} set-debug-cell-accesses! flag
@deffnx {C Function} scm_set_debug_cell_accesses_x (flag)
This function is used to turn on checking for a debug version of GUILE. This version does not support this functionality

@end deffn

@deffn {Scheme Procedure} standard-eval-closure module
@deffnx {C Function} scm_standard_eval_closure (module)
Return an eval closure for the module @var{module}.
@end deffn

@deffn {Scheme Procedure} mask-signals
@deffnx {C Function} scm_mask_signals ()
Mask signals. The returned value is not specified.
@end deffn

@deffn {Scheme Procedure} unmask-signals
@deffnx {C Function} scm_unmask_signals ()
Unmask signals. The returned value is not specified.
@end deffn

@deffn {Scheme Procedure} noop . args
@deffnx {C Function} scm_noop (args)
Do nothing.  When called without arguments, return @code{#f},
otherwise return the first argument.
@end deffn

@deffn {Scheme Procedure} system-async thunk
@deffnx {C Function} scm_system_async (thunk)
This function is deprecated.  You can use @var{thunk} directly
instead of explicitly creating an async object.

@end deffn

@deffn {Scheme Procedure} object-address obj
@deffnx {C Function} scm_object_address (obj)
Return an integer that for the lifetime of @var{obj} is uniquely
returned by this function for @var{obj}
@end deffn

@deffn {Scheme Procedure} %compute-slots class
@deffnx {C Function} scm_sys_compute_slots (class)
Return a list consisting of the names of all slots belonging to
class @var{class}, i.e.@: the slots of @var{class} and of all of
its superclasses.
@end deffn

@deffn {Scheme Procedure} get-keyword key l default_value
@deffnx {C Function} scm_get_keyword (key, l, default_value)
Determine an associated value for the keyword @var{key} from
the list @var{l}.  The list @var{l} has to consist of an even
number of elements, where, starting with the first, every
second element is a keyword, followed by its associated value.
If @var{l} does not hold a value for @var{key}, the value
@var{default_value} is returned.
@end deffn

@deffn {Scheme Procedure} slot-ref-using-class class obj slot_name
@deffnx {C Function} scm_slot_ref_using_class (class, obj, slot_name)

@end deffn

@deffn {Scheme Procedure} slot-set-using-class! class obj slot_name value
@deffnx {C Function} scm_slot_set_using_class_x (class, obj, slot_name, value)

@end deffn

@deffn {Scheme Procedure} class-of x
@deffnx {C Function} scm_class_of (x)
Return the class of @var{x}.
@end deffn

@deffn {Scheme Procedure} %goops-loaded
@deffnx {C Function} scm_sys_goops_loaded ()
Announce that GOOPS is loaded and perform initialization
on the C level which depends on the loaded GOOPS modules.
@end deffn

@deffn {Scheme Procedure} %method-more-specific? m1 m2 targs
@deffnx {C Function} scm_sys_method_more_specific_p (m1, m2, targs)
Return true if method @var{m1} is more specific than @var{m2} given the argument types (classes) listed in @var{targs}.
@end deffn

@deffn {Scheme Procedure} find-method . l
@deffnx {C Function} scm_find_method (l)

@end deffn

@deffn {Scheme Procedure} primitive-generic-generic subr
@deffnx {C Function} scm_primitive_generic_generic (subr)

@end deffn

@deffn {Scheme Procedure} enable-primitive-generic! . subrs
@deffnx {C Function} scm_enable_primitive_generic_x (subrs)

@end deffn

@deffn {Scheme Procedure} generic-capability? proc
@deffnx {C Function} scm_generic_capability_p (proc)

@end deffn

@deffn {Scheme Procedure} %invalidate-method-cache! gf
@deffnx {C Function} scm_sys_invalidate_method_cache_x (gf)

@end deffn

@deffn {Scheme Procedure} %invalidate-class class
@deffnx {C Function} scm_sys_invalidate_class (class)

@end deffn

@deffn {Scheme Procedure} %modify-class old new
@deffnx {C Function} scm_sys_modify_class (old, new)

@end deffn

@deffn {Scheme Procedure} %modify-instance old new
@deffnx {C Function} scm_sys_modify_instance (old, new)

@end deffn

@deffn {Scheme Procedure} %set-object-setter! obj setter
@deffnx {C Function} scm_sys_set_object_setter_x (obj, setter)

@end deffn

@deffn {Scheme Procedure} %allocate-instance class initargs
@deffnx {C Function} scm_sys_allocate_instance (class, initargs)
Create a new instance of class @var{class} and initialize it
from the arguments @var{initargs}.
@end deffn

@deffn {Scheme Procedure} slot-exists? obj slot_name
@deffnx {C Function} scm_slot_exists_p (obj, slot_name)
Return @code{#t} if @var{obj} has a slot named @var{slot_name}.
@end deffn

@deffn {Scheme Procedure} slot-bound? obj slot_name
@deffnx {C Function} scm_slot_bound_p (obj, slot_name)
Return @code{#t} if the slot named @var{slot_name} of @var{obj}
is bound.
@end deffn

@deffn {Scheme Procedure} slot-set! obj slot_name value
@deffnx {C Function} scm_slot_set_x (obj, slot_name, value)
Set the slot named @var{slot_name} of @var{obj} to @var{value}.
@end deffn

@deffn {Scheme Procedure} slot-exists-using-class? class obj slot_name
@deffnx {C Function} scm_slot_exists_using_class_p (class, obj, slot_name)

@end deffn

@deffn {Scheme Procedure} slot-bound-using-class? class obj slot_name
@deffnx {C Function} scm_slot_bound_using_class_p (class, obj, slot_name)

@end deffn

@deffn {Scheme Procedure} %fast-slot-set! obj index value
@deffnx {C Function} scm_sys_fast_slot_set_x (obj, index, value)
Set the slot with index @var{index} in @var{obj} to
@var{value}.
@end deffn

@deffn {Scheme Procedure} %fast-slot-ref obj index
@deffnx {C Function} scm_sys_fast_slot_ref (obj, index)
Return the slot value with index @var{index} from @var{obj}.
@end deffn

@deffn {Scheme Procedure} @@assert-bound-ref obj index
@deffnx {C Function} scm_at_assert_bound_ref (obj, index)
Like @code{assert-bound}, but use @var{index} for accessing
the value from @var{obj}.
@end deffn

@deffn {Scheme Procedure} assert-bound value obj
@deffnx {C Function} scm_assert_bound (value, obj)
Return @var{value} if it is bound, and invoke the
@var{slot-unbound} method of @var{obj} if it is not.
@end deffn

@deffn {Scheme Procedure} unbound? obj
@deffnx {C Function} scm_unbound_p (obj)
Return @code{#t} if @var{obj} is unbound.
@end deffn

@deffn {Scheme Procedure} make-unbound
@deffnx {C Function} scm_make_unbound ()
Return the unbound value.
@end deffn

@deffn {Scheme Procedure} accessor-method-slot-definition obj
@deffnx {C Function} scm_accessor_method_slot_definition (obj)
Return the slot definition of the accessor @var{obj}.
@end deffn

@deffn {Scheme Procedure} method-procedure obj
@deffnx {C Function} scm_method_procedure (obj)
Return the procedure of the method @var{obj}.
@end deffn

@deffn {Scheme Procedure} method-specializers obj
@deffnx {C Function} scm_method_specializers (obj)
Return specializers of the method @var{obj}.
@end deffn

@deffn {Scheme Procedure} method-generic-function obj
@deffnx {C Function} scm_method_generic_function (obj)
Return the generic function for the method @var{obj}.
@end deffn

@deffn {Scheme Procedure} generic-function-methods obj
@deffnx {C Function} scm_generic_function_methods (obj)
Return the methods of the generic function @var{obj}.
@end deffn

@deffn {Scheme Procedure} generic-function-name obj
@deffnx {C Function} scm_generic_function_name (obj)
Return the name of the generic function @var{obj}.
@end deffn

@deffn {Scheme Procedure} class-environment obj
@deffnx {C Function} scm_class_environment (obj)
Return the environment of the class @var{obj}.
@end deffn

@deffn {Scheme Procedure} class-slots obj
@deffnx {C Function} scm_class_slots (obj)
Return the slot list of the class @var{obj}.
@end deffn

@deffn {Scheme Procedure} class-precedence-list obj
@deffnx {C Function} scm_class_precedence_list (obj)
Return the class precedence list of the class @var{obj}.
@end deffn

@deffn {Scheme Procedure} class-direct-methods obj
@deffnx {C Function} scm_class_direct_methods (obj)
Return the direct methods of the class @var{obj}
@end deffn

@deffn {Scheme Procedure} class-direct-subclasses obj
@deffnx {C Function} scm_class_direct_subclasses (obj)
Return the direct subclasses of the class @var{obj}.
@end deffn

@deffn {Scheme Procedure} class-direct-slots obj
@deffnx {C Function} scm_class_direct_slots (obj)
Return the direct slots of the class @var{obj}.
@end deffn

@deffn {Scheme Procedure} class-direct-supers obj
@deffnx {C Function} scm_class_direct_supers (obj)
Return the direct superclasses of the class @var{obj}.
@end deffn

@deffn {Scheme Procedure} class-name obj
@deffnx {C Function} scm_class_name (obj)
Return the class name of @var{obj}.
@end deffn

@deffn {Scheme Procedure} instance? obj
@deffnx {C Function} scm_instance_p (obj)
Return @code{#t} if @var{obj} is an instance.
@end deffn

@deffn {Scheme Procedure} %inherit-magic! class dsupers
@deffnx {C Function} scm_sys_inherit_magic_x (class, dsupers)

@end deffn

@deffn {Scheme Procedure} %prep-layout! class
@deffnx {C Function} scm_sys_prep_layout_x (class)

@end deffn

@deffn {Scheme Procedure} %initialize-object obj initargs
@deffnx {C Function} scm_sys_initialize_object (obj, initargs)
Initialize the object @var{obj} with the given arguments
@var{initargs}.
@end deffn

@deffn {Scheme Procedure} make . args
@deffnx {C Function} scm_make (args)
Make a new object.  @var{args} must contain the class and
all necessary initialization information.
@end deffn

@deffn {Scheme Procedure} slot-ref obj slot_name
@deffnx {C Function} scm_slot_ref (obj, slot_name)
Return the value from @var{obj}'s slot with the name
@var{slot_name}.
@end deffn

@deffn {Scheme Procedure} %tag-body body
@deffnx {C Function} scm_sys_tag_body (body)
Internal GOOPS magic---don't use this function!
@end deffn

@deffn {Scheme Procedure} make-keyword-from-dash-symbol symbol
@deffnx {C Function} scm_make_keyword_from_dash_symbol (symbol)
Make a keyword object from a @var{symbol} that starts with a dash.
@end deffn

@deffn {Scheme Procedure} keyword-dash-symbol keyword
@deffnx {C Function} scm_keyword_dash_symbol (keyword)
Return the dash symbol for @var{keyword}.
This is the inverse of @code{make-keyword-from-dash-symbol}.
@end deffn

@deffn {Scheme Procedure} dimensions->uniform-array dims prot [fill]
@deffnx {Scheme Procedure} make-uniform-vector length prototype [fill]
@deffnx {C Function} scm_dimensions_to_uniform_array (dims, prot, fill)
Create and return a uniform array or vector of type
corresponding to @var{prototype} with dimensions @var{dims} or
length @var{length}.  If @var{fill} is supplied, it's used to
fill the array, otherwise @var{prototype} is used.
@end deffn

@deffn {Scheme Procedure} list->uniform-array ndim prot lst
@deffnx {C Function} scm_list_to_uniform_array (ndim, prot, lst)
Return a uniform array of the type indicated by prototype
@var{prot} with elements the same as those of @var{lst}.
Elements must be of the appropriate type, no coercions are
done.

The argument @var{ndim} determines the number of dimensions
of the array.  It is either an exact integer, giving the
number directly, or a list of exact integers, whose length
specifies the number of dimensions and each element is the
lower index bound of its dimension.
@end deffn

@deffn {Scheme Procedure} array-prototype ra
@deffnx {C Function} scm_array_prototype (ra)
Return an object that would produce an array of the same type
as @var{array}, if used as the @var{prototype} for
@code{make-uniform-array}.
@end deffn

@deffn {Scheme Procedure} call-with-dynamic-root thunk handler
@deffnx {C Function} scm_call_with_dynamic_root (thunk, handler)
Call @var{thunk} with a new dynamic state and within a continuation barrier.  The @var{handler} catches all otherwise uncaught throws and executes within the same dynamic context as @var{thunk}.
@end deffn

@deffn {Scheme Procedure} dynamic-root
@deffnx {C Function} scm_dynamic_root ()
Return an object representing the current dynamic root.

These objects are only useful for comparison using @code{eq?}.

@end deffn

@deffn {Scheme Procedure} uniform-vector? obj
@deffnx {C Function} scm_uniform_vector_p (obj)
Return @code{#t} if @var{obj} is a uniform vector.
@end deffn

@deffn {Scheme Procedure} uniform-vector-ref v idx
@deffnx {C Function} scm_uniform_vector_ref (v, idx)
Return the element at index @var{idx} of the
homogeneous numeric vector @var{v}.
@end deffn

@deffn {Scheme Procedure} uniform-vector-set! v idx val
@deffnx {C Function} scm_uniform_vector_set_x (v, idx, val)
Set the element at index @var{idx} of the
homogeneous numeric vector @var{v} to @var{val}.
@end deffn

@deffn {Scheme Procedure} uniform-vector->list uvec
@deffnx {C Function} scm_uniform_vector_to_list (uvec)
Convert the uniform numeric vector @var{uvec} to a list.
@end deffn

@deffn {Scheme Procedure} uniform-vector-length v
@deffnx {C Function} scm_uniform_vector_length (v)
Return the number of elements in the uniform vector @var{v}.
@end deffn

@deffn {Scheme Procedure} make-u8vector len [fill]
@deffnx {C Function} scm_make_u8vector (len, fill)
Return a newly allocated uniform numeric vector which can
hold @var{len} elements.  If @var{fill} is given, it is used to
initialize the elements, otherwise the contents of the vector
is unspecified.
@end deffn

@deffn {Scheme Procedure} u8vector . l
@deffnx {C Function} scm_u8vector (l)
Return a newly allocated uniform numeric vector containing
all argument values.
@end deffn

@deffn {Scheme Procedure} list->u8vector l
@deffnx {C Function} scm_list_to_u8vector (l)
Convert the list @var{l} to a numeric uniform vector.
@end deffn

@deffn {Scheme Procedure} any->u8vector obj
@deffnx {C Function} scm_any_to_u8vector (obj)
Convert @var{obj}, which can be a list, vector, or
uniform vector, to a numeric uniform vector of
type u8.
@end deffn

@deffn {Scheme Procedure} string-any-c-code char_pred s [start [end]]
@deffnx {C Function} scm_string_any (char_pred, s, start, end)
Check if the predicate @var{pred} is true for any character in
the string @var{s}.

Calls to @var{pred} are made from left to right across @var{s}.
When it returns true (ie.@: non-@code{#f}), that return value
is the return from @code{string-any}.

The SRFI-13 specification requires that the call to @var{pred}
on the last character of @var{s} (assuming that point is
reached) be a tail call, but currently in Guile this is not the
case.
@end deffn

@deffn {Scheme Procedure} string-every-c-code char_pred s [start [end]]
@deffnx {C Function} scm_string_every (char_pred, s, start, end)
Check if the predicate @var{pred} is true for every character
in the string @var{s}.

Calls to @var{pred} are made from left to right across @var{s}.
If the predicate is true for every character then the return
value from the last @var{pred} call is the return from
@code{string-every}.

If there are no characters in @var{s} (ie.@: @var{start} equals
@var{end}) then the return is @code{#t}.

The SRFI-13 specification requires that the call to @var{pred}
on the last character of @var{s} (assuming that point is
reached) be a tail call, but currently in Guile this is not the
case.
@end deffn

@deffn {Scheme Procedure} inf? x
@deffnx {C Function} scm_inf_p (x)
Return @code{#t} if @var{x} is either @samp{+inf.0}
or @samp{-inf.0}, @code{#f} otherwise.
@end deffn