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allow iflags to be constant expressions with typing-strictness==2

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* libguile/tags.h (SCM_MAKE_ITAG8_BITS): New helper, produces a
  scm_t_bits instead of a SCM, because SCM_UNPACK is not a constant
  expression with SCM_DEBUG_TYPING_STRICTNESS==2.
  (SCM_MAKIFLAG_BITS): Remove SCM_MAKIFLAG, and replace with this, which
  returns bits.
  (SCM_BOOL_F_BITS, SCM_ELISP_NIL_BITS, SCM_EOL_BITS, SCM_BOOL_T_BITS):
  (SCM_UNSPECIFIED_BITS, SCM_UNDEFINED_BITS, SCM_EOF_VAL_BITS):
  (SCM_UNBOUND_BITS): New definitions.  Defined SCM_BOOL_F, etc in terms
  of them.
  (SCM_XXX_ANOTHER_BOOLEAN_DONT_USE_0):
  (SCM_XXX_ANOTHER_BOOLEAN_DONT_USE_1):
  (SCM_XXX_ANOTHER_BOOLEAN_DONT_USE_2):
  (SCM_XXX_ANOTHER_LISP_FALSE_DONT_USE): Be bits instead of SCM values.
  (SCM_BITS_DIFFER_IN_EXACTLY_ONE_BIT_POSITION):
  (SCM_BITS_DIFFER_IN_EXACTLY_TWO_BIT_POSITIONS): Rename from
  SCM_VALUES_DIFFER_..., and take unpacked bits as the args.

* libguile/boolean.c: Update verify block to use
  SCM_BITS_DIFFER_IN_EXACTLY_TWO_BIT_POSITIONS et al.

* libguile/debug.c (scm_debug_opts):
* libguile/print.c (scm_print_opts):
* libguile/read.c (scm_read_opts): Use iflags bits for initializers.

* libguile/hash.c (scm_hasher): Use _BITS for iflags as case labels.

* libguile/pairs.c: Nil/null compile-time check uses
  SCM_ELISP_NIL_BITS.
This commit is contained in:
Andy Wingo 2011-05-13 10:19:48 +02:00
parent 544a29de14
commit 210c0325d3
7 changed files with 58 additions and 48 deletions
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10
libguile/hash.c
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@ -160,18 +160,16 @@ scm_hasher(SCM obj, unsigned long n, size_t d)
if (SCM_CHARP(obj))
return (unsigned)(scm_c_downcase(SCM_CHAR(obj))) % n;
switch (SCM_UNPACK (obj)) {
#ifndef SICP
case SCM_UNPACK(SCM_EOL):
case SCM_EOL_BITS:
d = 256;
break;
#endif
case SCM_UNPACK(SCM_BOOL_T):
case SCM_BOOL_T_BITS:
d = 257;
break;
case SCM_UNPACK(SCM_BOOL_F):
case SCM_BOOL_F_BITS:
d = 258;
break;
case SCM_UNPACK(SCM_EOF_VAL):
case SCM_EOF_VAL_BITS:
d = 259;
break;
default: