2001-10-02 16:52:00 +02:00
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------------------------------------------------------------------------------
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|
-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S E M _ M E C H --
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-- --
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-- S p e c --
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-- --
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2014-07-29 15:22:51 +02:00
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-- Copyright (C) 1996-2014, Free Software Foundation, Inc. --
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2001-10-02 16:52:00 +02:00
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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exp_atag.ads, [...]: Replace headers with GPL v3 headers.
2007-09-10 Robert Dewar <dewar@adacore.com>
* exp_atag.ads, exp_atag.adb, mlib-tgt-tru64.adb, mlib-tgt-aix.adb,
mlib-tgt-irix.adb, mlib-tgt-hpux.adb, mlib-tgt-linux.adb,
mlib-tgt-solaris.adb, mlib-tgt-vms-alpha.adb, mlib-tgt-vms-ia64.adb,
mlib-tgt-mingw.adb, mlib-tgt-vxworks.adb, ali.adb, ali.ads,
ali-util.adb, ali-util.ads, atree.h, back_end.adb, back_end.ads,
bcheck.adb, bcheck.ads, binde.adb, binde.ads, binderr.adb, binderr.ads,
bindgen.adb, bindgen.ads, bindusg.adb, bindusg.ads, butil.adb,
butil.ads, checks.adb, checks.ads, clean.adb, clean.ads, comperr.adb,
comperr.ads, cstand.adb, cstand.ads, debug_a.adb, debug_a.ads,
elists.h, errout.adb, erroutc.ads, errutil.adb, errutil.ads,
err_vars.ads, eval_fat.adb, eval_fat.ads, exp_sel.ads, exp_sel.adb,
exp_aggr.adb, exp_aggr.ads, expander.adb, expander.ads, exp_attr.ads,
exp_ch10.ads, exp_ch11.adb, exp_ch12.adb, exp_ch12.ads, exp_ch13.adb,
exp_ch13.ads, exp_ch2.adb, exp_ch2.ads, exp_ch3.ads, exp_ch4.adb,
exp_ch4.ads, exp_ch5.adb, exp_ch5.ads, exp_ch6.adb, exp_ch6.ads,
exp_ch7.adb, exp_ch7.ads, exp_ch8.adb, exp_ch8.ads, exp_ch9.adb,
exp_ch9.ads, exp_code.adb, exp_code.ads, exp_dbug.adb, exp_dbug.ads,
exp_disp.ads, exp_dist.adb, exp_dist.ads, exp_fixd.adb, exp_fixd.ads,
exp_imgv.adb, exp_imgv.ads, exp_intr.adb, exp_intr.ads, exp_pakd.adb,
exp_pakd.ads, exp_prag.adb, exp_prag.ads, exp_smem.adb, exp_strm.adb,
exp_strm.ads, exp_tss.adb, exp_tss.ads, exp_util.adb, exp_util.ads,
exp_vfpt.adb, exp_vfpt.ads, fmap.adb, fmap.ads, fname-sf.adb,
fname-sf.ads, fname-uf.adb, fname-uf.ads, frontend.adb, frontend.ads,
get_targ.adb, get_targ.ads, gnat1drv.adb, gnat1drv.ads, gnatbind.adb,
gnatbind.ads, gnatbl.c, gnatchop.adb, gnatclean.adb, gnatcmd.adb,
gnatcmd.ads, gnatdll.adb, gnatfind.adb, gnatkr.adb, gnatkr.ads,
gnatlbr.adb, gnatlink.adb, gnatlink.ads, gnatls.adb, gnatls.ads,
gnatmake.adb, gnatmake.ads, gnatmem.adb, gnatname.adb, gnatname.ads,
gnatprep.adb, gnatprep.ads, gnatsym.adb, gnatxref.adb,
gprep.adb, gprep.ads, hlo.adb, hlo.ads, impunit.adb, impunit.ads,
inline.adb, inline.ads, itypes.adb, itypes.ads, layout.adb, layout.ads,
lib-load.adb, lib-load.ads, lib-util.adb, lib-util.ads, lib-writ.adb,
lib-writ.ads, lib-xref.adb, lib-xref.ads, live.adb, live.ads,
make.adb, make.ads, makeutl.ads, makeutl.adb, makeusg.adb, makeusg.ads,
mdll.adb, mdll.ads, mdll-fil.adb, mdll-fil.ads, mdll-utl.adb,
mdll-utl.ads, memroot.adb, memroot.ads, mlib.adb, mlib.ads,
mlib-fil.adb, mlib-fil.ads, mlib-prj.adb, mlib-prj.ads, mlib-tgt.adb,
mlib-tgt.ads, mlib-utl.adb, mlib-utl.ads, namet.h, nmake.adt,
osint.adb, osint.ads, osint-b.adb, osint-b.ads, osint-c.adb,
osint-c.ads, osint-l.adb, osint-l.ads, osint-m.adb, osint-m.ads,
par.adb, par.ads, par-ch10.adb, par-ch11.adb, par-ch12.adb,
par-ch13.adb, par-ch2.adb, par-ch3.adb, par-ch4.adb, par-ch5.adb,
par-ch6.adb, par-ch7.adb, par-ch8.adb, par-ch9.adb, par-endh.adb,
par-labl.adb, par-load.adb, par-prag.adb, par-sync.adb, par-tchk.adb,
par-util.adb, prep.adb, prep.ads, prepcomp.adb, prepcomp.ads,
prj.adb, prj.ads, prj-attr.adb, prj-attr.ads, prj-com.ads,
prj-dect.adb, prj-dect.ads, prj-err.adb, prj-err.ads, prj-ext.adb,
prj-ext.ads, prj-makr.adb, prj-makr.ads, prj-nmsc.adb, prj-nmsc.ads,
prj-pars.adb, prj-pars.ads, prj-part.adb, prj-part.ads,
prj-pp.adb, prj-pp.ads, prj-proc.adb, prj-proc.ads,
prj-strt.adb, prj-strt.ads, prj-tree.adb, prj-tree.ads,
prj-util.adb, prj-util.ads, restrict.adb, restrict.ads,
rtsfind.adb, rtsfind.ads, scn.adb, scn.ads,
scng.adb, scng.ads, sdefault.ads, sem.ads, sem_aggr.ads, sem_attr.adb,
sem_case.adb, sem_case.ads, sem_cat.adb, sem_cat.ads, sem_ch10.adb,
sem_ch10.ads, sem_ch11.adb, sem_ch11.ads, sem_ch12.ads, sem_ch13.adb,
sem_ch13.ads, sem_ch2.adb, sem_ch2.ads, sem_ch3.adb, sem_ch3.ads,
sem_ch4.ads, sem_ch5.adb, sem_ch5.ads, sem_ch6.adb, sem_ch6.ads,
sem_ch7.adb, sem_ch7.ads, sem_ch8.adb, sem_ch8.ads, sem_ch9.adb,
sem_ch9.ads, sem_disp.adb, sem_disp.ads, sem_dist.adb, sem_dist.ads,
sem_elab.adb, sem_elab.ads, sem_elim.adb, sem_elim.ads, sem_eval.adb,
sem_eval.ads, sem_intr.adb, sem_intr.ads, sem_maps.adb, sem_maps.ads,
sem_mech.adb, sem_mech.ads, sem_prag.adb, sem_prag.ads, sem_res.adb,
sem_res.ads, sem_smem.adb, sem_smem.ads, sem_type.adb, sem_type.ads,
sem_util.adb, sem_util.ads, sem_vfpt.adb, sem_vfpt.ads, sem_warn.adb,
sem_warn.ads, sfn_scan.ads, sinfo-cn.adb, sinfo-cn.ads, sinput-c.adb,
sinput-c.ads, sinput-d.adb, sinput-d.ads, sinput-l.adb, sinput-l.ads,
sinput-p.adb, sinput-p.ads, snames.h, sprint.adb, sprint.ads,
stringt.h, style.ads, styleg.adb, styleg.ads, styleg-c.adb,
styleg-c.ads, stylesw.adb, stylesw.ads, switch.adb, switch.ads,
switch-b.adb, switch-b.ads, switch-c.adb, switch-c.ads, switch-m.adb,
switch-m.ads, symbols.adb, symbols.ads, targparm.adb, tbuild.adb,
tbuild.ads, tempdir.adb, tempdir.ads, tree_gen.adb, tree_gen.ads,
treepr.adb, treepr.ads, treeprs.adt, ttypef.ads, ttypes.ads,
types.h, uintp.h, urealp.h, usage.adb, usage.ads,
validsw.adb, validsw.ads, vxaddr2line.adb, xeinfo.adb, xnmake.adb,
xref_lib.adb, xref_lib.ads, xr_tabls.adb, xr_tabls.ads, xsinfo.adb,
xtreeprs.adb, xsnames.adb, vms_conv.ads, vms_conv.adb, xgnatugn.adb,
gprmake.adb, makegpr.ads, makegpr.adb, prj-attr-pm.ads, prj-attr-pm.adb,
mlib-tgt-lynxos.adb, mlib-tgt-darwin.adb, symbols-vms.adb,
symbols-processing-vms-alpha.adb, symbols-processing-vms-ia64.adb,
mlib-tgt-specific.adb, mlib-tgt-specific.ads, mlib-tgt-vms.adb,
mlib-tgt-vms.ads: Replace headers with GPL v3 headers.
From-SVN: r128332
2007-09-10 14:47:10 +02:00
|
|
|
-- ware Foundation; either version 3, or (at your option) any later ver- --
|
2001-10-02 16:52:00 +02:00
|
|
|
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
|
|
|
|
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
|
|
|
|
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
|
|
|
|
-- for more details. You should have received a copy of the GNU General --
|
exp_atag.ads, [...]: Replace headers with GPL v3 headers.
2007-09-10 Robert Dewar <dewar@adacore.com>
* exp_atag.ads, exp_atag.adb, mlib-tgt-tru64.adb, mlib-tgt-aix.adb,
mlib-tgt-irix.adb, mlib-tgt-hpux.adb, mlib-tgt-linux.adb,
mlib-tgt-solaris.adb, mlib-tgt-vms-alpha.adb, mlib-tgt-vms-ia64.adb,
mlib-tgt-mingw.adb, mlib-tgt-vxworks.adb, ali.adb, ali.ads,
ali-util.adb, ali-util.ads, atree.h, back_end.adb, back_end.ads,
bcheck.adb, bcheck.ads, binde.adb, binde.ads, binderr.adb, binderr.ads,
bindgen.adb, bindgen.ads, bindusg.adb, bindusg.ads, butil.adb,
butil.ads, checks.adb, checks.ads, clean.adb, clean.ads, comperr.adb,
comperr.ads, cstand.adb, cstand.ads, debug_a.adb, debug_a.ads,
elists.h, errout.adb, erroutc.ads, errutil.adb, errutil.ads,
err_vars.ads, eval_fat.adb, eval_fat.ads, exp_sel.ads, exp_sel.adb,
exp_aggr.adb, exp_aggr.ads, expander.adb, expander.ads, exp_attr.ads,
exp_ch10.ads, exp_ch11.adb, exp_ch12.adb, exp_ch12.ads, exp_ch13.adb,
exp_ch13.ads, exp_ch2.adb, exp_ch2.ads, exp_ch3.ads, exp_ch4.adb,
exp_ch4.ads, exp_ch5.adb, exp_ch5.ads, exp_ch6.adb, exp_ch6.ads,
exp_ch7.adb, exp_ch7.ads, exp_ch8.adb, exp_ch8.ads, exp_ch9.adb,
exp_ch9.ads, exp_code.adb, exp_code.ads, exp_dbug.adb, exp_dbug.ads,
exp_disp.ads, exp_dist.adb, exp_dist.ads, exp_fixd.adb, exp_fixd.ads,
exp_imgv.adb, exp_imgv.ads, exp_intr.adb, exp_intr.ads, exp_pakd.adb,
exp_pakd.ads, exp_prag.adb, exp_prag.ads, exp_smem.adb, exp_strm.adb,
exp_strm.ads, exp_tss.adb, exp_tss.ads, exp_util.adb, exp_util.ads,
exp_vfpt.adb, exp_vfpt.ads, fmap.adb, fmap.ads, fname-sf.adb,
fname-sf.ads, fname-uf.adb, fname-uf.ads, frontend.adb, frontend.ads,
get_targ.adb, get_targ.ads, gnat1drv.adb, gnat1drv.ads, gnatbind.adb,
gnatbind.ads, gnatbl.c, gnatchop.adb, gnatclean.adb, gnatcmd.adb,
gnatcmd.ads, gnatdll.adb, gnatfind.adb, gnatkr.adb, gnatkr.ads,
gnatlbr.adb, gnatlink.adb, gnatlink.ads, gnatls.adb, gnatls.ads,
gnatmake.adb, gnatmake.ads, gnatmem.adb, gnatname.adb, gnatname.ads,
gnatprep.adb, gnatprep.ads, gnatsym.adb, gnatxref.adb,
gprep.adb, gprep.ads, hlo.adb, hlo.ads, impunit.adb, impunit.ads,
inline.adb, inline.ads, itypes.adb, itypes.ads, layout.adb, layout.ads,
lib-load.adb, lib-load.ads, lib-util.adb, lib-util.ads, lib-writ.adb,
lib-writ.ads, lib-xref.adb, lib-xref.ads, live.adb, live.ads,
make.adb, make.ads, makeutl.ads, makeutl.adb, makeusg.adb, makeusg.ads,
mdll.adb, mdll.ads, mdll-fil.adb, mdll-fil.ads, mdll-utl.adb,
mdll-utl.ads, memroot.adb, memroot.ads, mlib.adb, mlib.ads,
mlib-fil.adb, mlib-fil.ads, mlib-prj.adb, mlib-prj.ads, mlib-tgt.adb,
mlib-tgt.ads, mlib-utl.adb, mlib-utl.ads, namet.h, nmake.adt,
osint.adb, osint.ads, osint-b.adb, osint-b.ads, osint-c.adb,
osint-c.ads, osint-l.adb, osint-l.ads, osint-m.adb, osint-m.ads,
par.adb, par.ads, par-ch10.adb, par-ch11.adb, par-ch12.adb,
par-ch13.adb, par-ch2.adb, par-ch3.adb, par-ch4.adb, par-ch5.adb,
par-ch6.adb, par-ch7.adb, par-ch8.adb, par-ch9.adb, par-endh.adb,
par-labl.adb, par-load.adb, par-prag.adb, par-sync.adb, par-tchk.adb,
par-util.adb, prep.adb, prep.ads, prepcomp.adb, prepcomp.ads,
prj.adb, prj.ads, prj-attr.adb, prj-attr.ads, prj-com.ads,
prj-dect.adb, prj-dect.ads, prj-err.adb, prj-err.ads, prj-ext.adb,
prj-ext.ads, prj-makr.adb, prj-makr.ads, prj-nmsc.adb, prj-nmsc.ads,
prj-pars.adb, prj-pars.ads, prj-part.adb, prj-part.ads,
prj-pp.adb, prj-pp.ads, prj-proc.adb, prj-proc.ads,
prj-strt.adb, prj-strt.ads, prj-tree.adb, prj-tree.ads,
prj-util.adb, prj-util.ads, restrict.adb, restrict.ads,
rtsfind.adb, rtsfind.ads, scn.adb, scn.ads,
scng.adb, scng.ads, sdefault.ads, sem.ads, sem_aggr.ads, sem_attr.adb,
sem_case.adb, sem_case.ads, sem_cat.adb, sem_cat.ads, sem_ch10.adb,
sem_ch10.ads, sem_ch11.adb, sem_ch11.ads, sem_ch12.ads, sem_ch13.adb,
sem_ch13.ads, sem_ch2.adb, sem_ch2.ads, sem_ch3.adb, sem_ch3.ads,
sem_ch4.ads, sem_ch5.adb, sem_ch5.ads, sem_ch6.adb, sem_ch6.ads,
sem_ch7.adb, sem_ch7.ads, sem_ch8.adb, sem_ch8.ads, sem_ch9.adb,
sem_ch9.ads, sem_disp.adb, sem_disp.ads, sem_dist.adb, sem_dist.ads,
sem_elab.adb, sem_elab.ads, sem_elim.adb, sem_elim.ads, sem_eval.adb,
sem_eval.ads, sem_intr.adb, sem_intr.ads, sem_maps.adb, sem_maps.ads,
sem_mech.adb, sem_mech.ads, sem_prag.adb, sem_prag.ads, sem_res.adb,
sem_res.ads, sem_smem.adb, sem_smem.ads, sem_type.adb, sem_type.ads,
sem_util.adb, sem_util.ads, sem_vfpt.adb, sem_vfpt.ads, sem_warn.adb,
sem_warn.ads, sfn_scan.ads, sinfo-cn.adb, sinfo-cn.ads, sinput-c.adb,
sinput-c.ads, sinput-d.adb, sinput-d.ads, sinput-l.adb, sinput-l.ads,
sinput-p.adb, sinput-p.ads, snames.h, sprint.adb, sprint.ads,
stringt.h, style.ads, styleg.adb, styleg.ads, styleg-c.adb,
styleg-c.ads, stylesw.adb, stylesw.ads, switch.adb, switch.ads,
switch-b.adb, switch-b.ads, switch-c.adb, switch-c.ads, switch-m.adb,
switch-m.ads, symbols.adb, symbols.ads, targparm.adb, tbuild.adb,
tbuild.ads, tempdir.adb, tempdir.ads, tree_gen.adb, tree_gen.ads,
treepr.adb, treepr.ads, treeprs.adt, ttypef.ads, ttypes.ads,
types.h, uintp.h, urealp.h, usage.adb, usage.ads,
validsw.adb, validsw.ads, vxaddr2line.adb, xeinfo.adb, xnmake.adb,
xref_lib.adb, xref_lib.ads, xr_tabls.adb, xr_tabls.ads, xsinfo.adb,
xtreeprs.adb, xsnames.adb, vms_conv.ads, vms_conv.adb, xgnatugn.adb,
gprmake.adb, makegpr.ads, makegpr.adb, prj-attr-pm.ads, prj-attr-pm.adb,
mlib-tgt-lynxos.adb, mlib-tgt-darwin.adb, symbols-vms.adb,
symbols-processing-vms-alpha.adb, symbols-processing-vms-ia64.adb,
mlib-tgt-specific.adb, mlib-tgt-specific.ads, mlib-tgt-vms.adb,
mlib-tgt-vms.ads: Replace headers with GPL v3 headers.
From-SVN: r128332
2007-09-10 14:47:10 +02:00
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-- Public License distributed with GNAT; see file COPYING3. If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license. --
|
2001-10-02 16:52:00 +02:00
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|
|
-- --
|
|
|
|
-- GNAT was originally developed by the GNAT team at New York University. --
|
2002-10-23 09:33:35 +02:00
|
|
|
-- Extensive contributions were provided by Ada Core Technologies Inc. --
|
2001-10-02 16:52:00 +02:00
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-- --
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------------------------------------------------------------------------------
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-- This package contains the routine used to establish calling mechanisms
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-- The reason we separate this off into its own package is that it is
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-- entirely possible that it may need some target specific specialization.
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with Types; use Types;
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package Sem_Mech is
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-------------------------------------------------
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-- Definitions for Parameter Mechanism Control --
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-------------------------------------------------
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-- For parameters passed to subprograms, and for function return values,
|
2014-07-29 15:22:51 +02:00
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-- a passing mechanism is defined. The entity attribute Mechanism returns
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2001-10-02 16:52:00 +02:00
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-- an indication of the mechanism, and Set_Mechanism can be used to set
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-- the mechanism. At the program level, there are three ways to explicitly
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-- set the mechanism:
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-- An Import_xxx or Export_xxx pragma (where xxx is Function, Procedure,
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-- or Valued_Procedure) can explicitly set the mechanism for either a
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-- parameter or a function return value. A mechanism explicitly set by
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-- such a pragma overrides the effect of C_Pass_By_Copy described below.
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-- If convention C_Pass_By_Copy is set for a record, and the record type
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-- is used as the formal type of a subprogram with a foreign convention,
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-- then the mechanism is set to By_Copy.
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-- If a pragma C_Pass_By_Copy applies, and a record type has Convention
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-- C, and the record type is used as the formal type of a subprogram
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-- with a foreign convention, then the mechanism is set to use By_Copy
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-- if the size of the record is sufficiently small (as determined by
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-- the value of the parameter to pragma C_Pass_By_Copy).
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-- The subtype Mechanism_Type (declared in Types) is used to describe
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-- the mechanism to be used. The following special values of this type
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-- specify the mechanism, as follows.
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Default_Mechanism : constant Mechanism_Type := 0;
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-- The default setting indicates that the backend will choose the proper
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-- default mechanism. This depends on the convention of the subprogram
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-- involved, and is generally target dependent. In the compiler, the
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-- backend chooses the mechanism in this case in accordance with any
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-- requirements imposed by the ABI. Note that Default is never used for
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-- record types on foreign convention subprograms, since By_Reference
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-- is forced for such types unless one of the above described approaches
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-- is used to explicitly force By_Copy.
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By_Copy : constant Mechanism_Type := -1;
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-- Passing by copy is forced. The exact meaning of By_Copy (e.g. whether
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-- at a low level the value is passed in registers, or the value is copied
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-- and a pointer is passed), is determined by the backend in accordance
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-- with requirements imposed by the ABI. Note that in the extended import
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-- and export pragma mechanisms, this is called Value, rather than Copy.
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By_Reference : constant Mechanism_Type := -2;
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-- Passing by reference is forced. This is always equivalent to passing
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-- a simple pointer in the case of subprograms with a foreign convention.
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-- For unconstrained arrays passed to foreign convention subprograms, the
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-- address of the first element of the array is passed. For convention
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-- Ada, the result is logically to pass a reference, but the precise
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-- mechanism (e.g. to pass bounds of unconstrained types and other needed
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-- special information) is determined by the backend in accordance with
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-- requirements imposed by the ABI as interpreted for Ada.
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[multiple changes]
2014-08-01 Vincent Celier <celier@adacore.com>
* make.adb (Await_Compile): Remove loop that was only needed
for VMS.
2014-08-01 Robert Dewar <dewar@adacore.com>
* a-calcon.ads, a-direct.adb, a-dirval-mingw.adb, a-dirval.adb,
a-dirval.ads, a-except-2005.adb, a-excpol-abort.adb,
a-numaux-darwin.ads, a-numaux.ads, bindgen.adb, bindusg.adb,
einfo.adb, einfo.ads, err_vars.ads, errout.ads, errutil.adb,
exp_ch3.adb, exp_ch4.adb, exp_ch7.adb, exp_ch7.ads, fname-uf.adb,
fname.adb, fname.ads, freeze.adb, g-debpoo.adb, g-dirope.ads,
g-excact.ads, g-expect.ads, g-socket.adb, g-socket.ads, g-sothco.ads,
g-traceb.ads, gnat_rm.texi, gnatlink.adb, gnatls.adb, i-cstrea.adb,
krunch.adb, krunch.ads, layout.adb, lib-util.adb, make.adb,
mlib.adb, osint-b.adb, osint-b.ads, osint-c.adb, osint.adb,
osint.ads, output.ads, par.adb, prj-conf.adb, prj-env.adb,
prj-makr.adb, prj-nmsc.adb, prj.adb, prj.ads, repinfo.adb, rtsfind.adb,
rtsfind.ads, s-excmac-gcc.ads, s-fatgen.adb, s-mastop.ads,
s-parame-ae653.ads, s-parame-hpux.ads, s-parame-vxworks.ads,
s-parame.ads, s-soflin.ads, s-stoele.adb, s-tasini.adb,
s-taspri-dummy.ads, s-taspri-hpux-dce.ads, s-taspri-mingw.ads,
s-taspri-posix-noaltstack.ads, s-taspri-posix.ads,
s-taspri-solaris.ads, s-taspri-vxworks.ads, s-trasym.ads,
sem_ch12.adb, sem_ch4.adb, sem_eval.adb, sem_intr.adb, sem_mech.adb,
sem_mech.ads, sem_prag.adb, sem_res.adb, sem_util.adb, sem_util.ads,
sinfo.adb, sinfo.ads, sinput-c.adb, symbols.ads, targparm.adb,
treepr.adb, types.ads, xr_tabls.adb, xr_tabls.ads: Remove VMS
specific code and comments.
2014-08-01 Ed Schonberg <schonberg@adacore.com>
* sem_ch5.adb (Analyze_Iterator_Specification): New procedure
Check_Reverse_Iteration, to verify the legality of the Reverse
indicator on various container types, and to detect illegal
reverse iterations on containers that only supoort forward
iteration.
From-SVN: r213431
2014-08-01 11:38:48 +02:00
|
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|
pragma Assert (Mechanism_Type'First = -2);
|
2014-07-29 15:22:51 +02:00
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-- Check definition in types is right!
|
2001-10-02 16:52:00 +02:00
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-- All the above special values are non-positive. Positive values for
|
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|
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-- Mechanism_Type values have a special meaning. They are used only in
|
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-- the case of records, as a result of the use of the C_Pass_By_Copy
|
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|
-- pragma, and the meaning is that if the size of the record is known
|
|
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|
-- at compile time and does not exceed the mechanism type value, then
|
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-- By_Copy passing is forced, otherwise By_Reference is forced.
|
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|
----------------------
|
|
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|
-- Global Variables --
|
|
|
|
----------------------
|
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|
Default_C_Record_Mechanism : Mechanism_Type := By_Reference;
|
|
|
|
-- This value is the default mechanism used for C convention records
|
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|
|
-- in foreign-convention subprograms if no mechanism is otherwise
|
|
|
|
-- specified. This value is modified appropriately by the occurrence
|
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|
-- of a C_Pass_By_Copy configuration pragma.
|
|
|
|
|
|
|
|
-----------------
|
|
|
|
-- Subprograms --
|
|
|
|
-----------------
|
|
|
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|
|
procedure Set_Mechanisms (E : Entity_Id);
|
|
|
|
-- E is a subprogram or subprogram type that has been frozen, so the
|
|
|
|
-- convention of the subprogram and all its formal types and result
|
|
|
|
-- type in the case of a function are established. The function of
|
|
|
|
-- this call is to set mechanism values for formals and for the
|
|
|
|
-- function return if they have not already been explicitly set by
|
|
|
|
-- a use of an extended Import or Export pragma. The idea is to set
|
sem_ch10.adb, [...]: Fix comment typos.
gcc/ada/
* sem_ch10.adb, sem_ch10.ads,
sem_ch12.adb, sem_ch12.ads, sem_ch13.adb, sem_ch13.ads,
sem_ch3.adb, sem_ch4.adb, sem_ch5.adb, sem_ch6.adb,
sem_ch6.ads, sem_ch8.adb, sem_ch8.ads, sem_ch9.adb,
sem_elab.adb, sem_elab.ads, sem_elim.ads, sem_eval.adb,
sem_eval.ads, sem_intr.adb, sem_mech.adb, sem_mech.ads,
sem_prag.adb, sem_prag.ads, sem_res.adb, sem_res.ads,
sem_type.adb, sem_util.adb, sem_util.ads, sem_warn.adb,
sem_warn.ads: Fix comment typos.
From-SVN: r134242
2008-04-13 19:41:15 +02:00
|
|
|
-- mechanism values wherever the semantics is dictated by either
|
2001-10-02 16:52:00 +02:00
|
|
|
-- requirements or implementation advice in the RM, and to leave
|
|
|
|
-- the mechanism set to Default if there is no requirement, so that
|
|
|
|
-- the back-end is free to choose the most efficient method.
|
|
|
|
|
|
|
|
procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
|
|
|
|
-- Mech is a parameter passing mechanism (see Import_Function syntax
|
|
|
|
-- for MECHANISM_NAME). This routine checks that the mechanism argument
|
|
|
|
-- has the right form, and if not issues an error message. If the
|
|
|
|
-- argument has the right form then the Mechanism field of Ent is
|
|
|
|
-- set appropriately. It also performs some error checks. Note that
|
|
|
|
-- the mechanism name has not been analyzed (and cannot indeed be
|
|
|
|
-- analyzed, since it is semantic nonsense), so we get it in the
|
|
|
|
-- exact form created by the parser.
|
|
|
|
|
|
|
|
procedure Set_Mechanism_With_Checks
|
|
|
|
(Ent : Entity_Id;
|
|
|
|
Mech : Mechanism_Type;
|
|
|
|
Enod : Node_Id);
|
|
|
|
-- Sets the mechanism of Ent to the given Mech value, after first checking
|
|
|
|
-- that the request makes sense. If it does not make sense, a warning is
|
|
|
|
-- posted on node Enod, and the Mechanism of Ent is unchanged.
|
|
|
|
|
|
|
|
end Sem_Mech;
|