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structs with tail arrays are not simple

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* libguile/struct.h (SCM_VTABLE_FLAG_SIMPLE, SCM_VTABLE_FLAG_SIMPLE_RW):
* libguile/struct.c (set_vtable_layout_flags): Vtable whose layouts
  include a tail array are not simple.  Fixes bug 12808.
This commit is contained in:
Andy Wingo 2013-03-05 18:22:11 +01:00
parent e20cec744f
commit 1b787ef9ec
2 changed files with 7 additions and 8 deletions
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9
libguile/struct.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1996,1997,1998,1999,2000,2001, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
/* Copyright (C) 1996,1997,1998,1999,2000,2001, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@ -153,8 +153,9 @@ SCM_DEFINE (scm_make_struct_layout, "make-struct-layout", 1, 0, 0,
#undef FUNC_NAME
/* Check whether VTABLE instances have a simple layout (i.e., either only "pr"
or only "pw" fields) and update its flags accordingly. */
/* Check whether VTABLE instances have a simple layout (i.e., either
only "pr" or only "pw" fields and no tail array) and update its flags
accordingly. */
static void
set_vtable_layout_flags (SCM vtable)
{
@ -180,13 +181,11 @@ set_vtable_layout_flags (SCM vtable)
switch (c_layout[field + 1])
{
case 'w':
case 'W':
if (field == 0)
flags |= SCM_VTABLE_FLAG_SIMPLE_RW;
break;
case 'r':
case 'R':
flags &= ~SCM_VTABLE_FLAG_SIMPLE_RW;
break;