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yap-6.3
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make nb_ undefined variable return an error, as SWI does.

This commit is contained in:
Vitor Santos Costa 2010-02-28 00:57:29 +00:00
parent ec30e08f69
commit 7037b38fa7
5 changed files with 32 additions and 4 deletions
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15
C/errors.c
View File

@ -902,6 +902,21 @@ Yap_Error(yap_error_number type, Term where, char *format,...)
serious = TRUE;
}
break;
case EXISTENCE_ERROR_VARIABLE:
{
int i;
Term ti[2];
i = strlen(tmpbuf);
ti[0] = MkAtomTerm(AtomVariable);
ti[1] = where;
nt[0] = Yap_MkApplTerm(FunctorExistenceError, 2, ti);
tp = tmpbuf+i;
psize -= i;
fun = FunctorError;
serious = TRUE;
}
break;
case EVALUATION_ERROR_FLOAT_OVERFLOW:
{
int i;

16
C/globals.c
View File

@ -1285,8 +1285,10 @@ p_nb_getval(void)
return FALSE;
}
ge = FindGlobalEntry(AtomOfTerm(t));
if (!ge)
if (!ge) {
Yap_Error(EXISTENCE_ERROR_VARIABLE,t,"nb_getval");
return FALSE;
}
READ_LOCK(ge->GRWLock);
to = ge->global;
if (IsVarTerm(to) && IsUnboundVar(VarOfTerm(to))) {
@ -1309,8 +1311,10 @@ nbdelete(Atom at)
Prop gp, g0;
ge = FindGlobalEntry(at);
if (!ge)
if (!ge) {
Yap_Error(EXISTENCE_ERROR_VARIABLE,MkAtomTerm(at),"nb_delete");
return FALSE;
}
WRITE_LOCK(ge->GRWLock);
ae = ge->AtomOfGE;
if (GlobalVariables == ge) {
@ -1375,8 +1379,10 @@ p_nb_create(void)
return FALSE;
}
ge = GetGlobalEntry(AtomOfTerm(t));
if (!ge)
if (!ge) {
Yap_Error(EXISTENCE_ERROR_VARIABLE,t,"nb_create");
return FALSE;
}
if (IsVarTerm(tarity)) {
Yap_Error(INSTANTIATION_ERROR,tarity,"nb_create");
return FALSE;
@ -1418,8 +1424,10 @@ p_nb_create2(void)
return FALSE;
}
ge = GetGlobalEntry(AtomOfTerm(t));
if (!ge)
if (!ge) {
Yap_Error(EXISTENCE_ERROR_VARIABLE,t,"nb_create");
return FALSE;
}
if (IsVarTerm(tarity)) {
Yap_Error(INSTANTIATION_ERROR,tarity,"nb_create");
return FALSE;

1
H/Yap.h
View File

@ -464,6 +464,7 @@ typedef enum
EXISTENCE_ERROR_KEY,
EXISTENCE_ERROR_SOURCE_SINK,
EXISTENCE_ERROR_STREAM,
EXISTENCE_ERROR_VARIABLE,
INSTANTIATION_ERROR,
INTERRUPT_ERROR,
OPERATING_SYSTEM_ERROR,

2
pl/boot.yap
View File

@ -75,6 +75,8 @@ true :- true.
nb_setval('$open_expands_filename',true),
'$debug_on'(false),
nb_setval('$trace',off),
nb_setval('$assert_all',off),
nb_setval('$if_skip_mode',no_skip),
b_setval('$spy_glist',[]),
% simple trick to find out if this is we are booting from Prolog.
get_value('$user_module',V),

2
pl/messages.yap
View File

@ -166,6 +166,8 @@ system_message(error(existence_error(key,Key), Where)) -->
[ 'EXISTENCE ERROR- ~w: ~w not an existing key' - [Where,Key] ].
system_message(error(existence_error(thread,Thread), Where)) -->
[ 'EXISTENCE ERROR- ~w: ~w not a running thread' - [Where,Thread] ].
system_message(error(existence_error(variable,Var), Where)) -->
[ 'EXISTENCE ERROR- ~w: variable ~w does not exist' - [Where,Var] ].
system_message(error(existence_error(Name,F), W)) -->
{ object_name(Name, ObjName) },
[ 'EXISTENCE ERROR- ~w could not open ~a ~w' - [W,ObjName,F] ].