non-zero value if X is finite. (From ISO C 9x standard.)
(scm_inexact_to_exact): Bugfix: Don't pass NaNs to scm_dbl2big.
(Thanks to Jon Trowbridge and Greg Harvey.)
resolve-module.
(resolve-module): Bugfix: Make it possible for a module at a
deeper level (x y z) to depend on a module on a higher (x y).
Use try-load-module.
(scm_system_module_env_p): Assume root environment is no lookup
closure is found.
* modules.c, modules.h, eval.c, eval.h (scm_env_top_level,
scm_top_level_env, scm_system_module_env_p): Moved to modules.c.
scm_misc_error when pos is a string. This allows for dispatching
arbitrary error messages with one argument via SCM_ASSERT:
SCM_ASSERT (<cond>, obj, "Undigestable object: %S", <subr>);
(scm_struct_table): Weak key table with auxilliary information for
struct types. Currently used for names and wrapper classes.
(scm_struct_ihashq): Hash function for structs.
(scm_struct_create_handle): Get/create entry in scm_struct_table.
(scm_struct_vtable_name, scm_set_struct_vtable_name_x): Procedures
for accessing names of vtables. The record implementation in
boot-9.scm currently uses the setter to record the name of record
types. When the object system is initialized, it can use this
information to create wrapper classes with suitable names.
(scm_init_struct): Allocate scm_struct_table.
(scm_alloc_struct): Don't initialize scm_struct_i_tag here.
(struct tags are a finite resource and we might want to restrict
the use of tags to vtables only. E.g., Goops only uses tags for
classes.)
(scm_make_struct): Use scm_struct_entity_n_extra_words instead of
magic number 5.
(scm_struct_vtable_tag): Use scm_struct_i_tag instead of magic
number -1.
(scm_class_keyword): Removed. (Class is automatically created by
make_smob_classes.)
(scm_smob_class): Array of smob classes indexed by smobnum.
(scm_make_extended_class): "Plugin" function pointer for creation
of wrapper classes for smob and struct types.
(scm_class_of): Handle compiled closures. (Currently regarded as
<procedure>.);
Use scm_smob_class to handle smob types;
Handle scm_tc16_bigpos, scm_tc16_bigneg, and, scm_tc16_keyword
through scm_smob_class;
Handle structs.
* smob.h (SCM_TC2SMOBNUM): New macro for conversion between tc16
type code and smobnum.
