(scm_m_define): Change order to first create binding and
evaluating the expression afterwards.
(scm_m_set_x): Memoize complete set! expression. Only leave
symbols if no binding exists at memoization time. Throw error if
assigning to a syntactic keyword.
(lazy_memoize_variable): New function.
(CEVAL): When execution set!, perform lazy memoization if
unmemoized symbol is detected.
* libguile/modules.c (module_variable): Return variables with
unbound value.
* libguile/tags.h: Fix comment.
* test-suite/tests/syntax.test: Add test case to check the correct
handling of define expressions.
scm_c_downcase): Use ctype.h toupper and tolower. This will be useful
in 8-bit locales, and ensures consistency with char-upper-case? and
char-lower-case? which already use ctype.h.
(scm_c_upcase_table, scm_c_downcase_table, scm_lowers, scm_uppers): Remove.
(scm_tables_prehistory): Remove.
expression a new variable in the local module is defined in terms
of an equally named variable from some other module, use @ to
refer to the variable in the other module. This is necessary due
to section 5.2.1 of R5RS: In a define expression first the new
binding is created and then the expression is evaluated.
* deprecated.h (SCM_IFRINC, SCM_ICDR, SCM_IFRAME, SCM_IDIST,
SCM_ICDRP), eval.c (SCM_IFRINC, SCM_ICDR, SCM_IFRAME, SCM_IDIST,
SCM_ICDRP), eval.h (SCM_ICDR, SCM_IFRINC, SCM_IFRAME, SCM_IDIST,
SCM_ICDRP): Deprecated and added to deprecated.h. Moved from
eval.h to eval.c.
* deprecated.c (scm_isymnames), deprecated.h (scm_isymnames,
SCM_ISYMNUM, SCM_ISYMCHARS), eval.c (SCM_ISYMNUM, isymnames,
scm_unmemocopy, CEVAL), print.c (scm_isymnames), tags.h
(SCM_ISYMNUM, scm_isymnames, SCM_ISYMCHARS): Deprecated
scm_isymnames, SCM_ISYMNUM and SCM_ISYMCHARS and added to
deprecated.[hc]. Moved scm_isymnames from print.c to eval.c and
renamed to isymnames. Moved SCM_ISYMNUM from tags.h to eval.c and
renamed to ISYMNUM.
* eval.c (scm_i_print_iloc, scm_i_print_isym), eval.h
(scm_i_print_iloc, scm_i_print_isym), print.c (scm_iprin1):
Extracted printing of ilocs and isyms to guile internal functions
scm_i_print_iloc, scm_i_print_isym of eval.c.
rounding in x+0.5 when x is a big value already an integer. In
certain hardware rounding cases x+0.5 can give an adjacent integer,
leading to that as the result, when we really just wanted x itself.
scm_tc8_isym): Renamed scm_tags to scm_tc8_tags. Renamed
scm_tc9_flag to scm_tc8_flag. Introduced new identifier
scm_tc8_isym. Defined tc8-tags relative to scm_tc3_imm24.
Defined the tc8-tag for flags to be 0x04, which will mean that
SCM_BOOL_F will also have the value 0x04 instead of 0x013c. Due
to the reduced number of bits and the simpler bit pattern for
SCM_BOOL_F, certain machines may be able to use more efficient
processor instructions to deal with SCM_BOOL_F.
(SCM_ITAG9, SCM_MAKE_ITAG9, SCM_ITAG9_DATA): Removed. These have
never been defined in a released version, thus no need to
deprecate them.
(SCM_IFLAGP, SCM_MAKIFLAG, SCM_IFLAGNUM): Flags now use tc8
instead of tc9 tags.
(SCM_ISYMP, SCM_MAKISYM, SCM_ISYMNUM): Isyms now use tc8 instead
of tc9 tags.
(SCM_MAKSPCSYM): Removed. It is almost impossible that user code
could have used this definition.
(SCM_IM_AND, SCM_IM_BEGIN, SCM_IM_CASE, SCM_IM_COND, SCM_IM_DO,
SCM_IM_IF, SCM_IM_LAMBDA, SCM_IM_LET, SCM_IM_LETSTAR,
SCM_IM_LETREC, SCM_IM_OR, SCM_IM_QUOTE, SCM_IM_SET_X): Now encoded
as isyms, as special isyms don't exist any more.
