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support for BIND tokens in the Python bindings

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This commit is contained in:
Krasimir Angelov
2022-07-16 20:29:36 +02:00
parent 4d446fcd3f
commit a42cec2107
4 changed files with 143 additions and 80 deletions
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44
src/runtime/c/pgf/parser.c
View File

@@ -44,6 +44,7 @@ typedef struct {
PgfParseState *before;
PgfParseState *after;
PgfToken prefix;
bool prefix_bind;
PgfTokenProb* tp;
PgfExprEnum en; // enumeration for the generated trees/tokens
#ifdef PGF_COUNTS_DEBUG
@@ -1009,6 +1010,7 @@ pgf_new_parse_state(PgfParsing* ps, size_t start_offset,
(start_offset == end_offset);
state->start_offset = start_offset;
state->end_offset = end_offset;
state->viterbi_prob = viterbi_prob;
state->lexicon_idx =
gu_new_buf(PgfLexiconIdxEntry, ps->pool);
@@ -1381,20 +1383,30 @@ pgf_parsing_symbol(PgfParsing* ps, PgfItem* item, PgfSymbol sym)
break;
}
case PGF_SYMBOL_BIND: {
if (ps->before->start_offset == ps->before->end_offset &&
ps->before->needs_bind) {
PgfParseState* state =
pgf_new_parse_state(ps, ps->before->end_offset, BIND_HARD,
item->inside_prob+item->conts->outside_prob);
if (state != NULL) {
pgf_item_advance(item, ps->pool);
gu_buf_heap_push(state->agenda, pgf_item_prob_order, &item);
} else {
pgf_item_free(ps, item);
}
} else {
pgf_item_free(ps, item);
}
if (!ps->prefix_bind && ps->prefix != NULL && *(ps->sentence + ps->before->end_offset) == 0) {
PgfProductionApply* papp = gu_variant_data(item->prod);
ps->tp = gu_new(PgfTokenProb, ps->out_pool);
ps->tp->tok = NULL;
ps->tp->cat = item->conts->ccat->cnccat->abscat->name;
ps->tp->fun = papp->fun->absfun->name;
ps->tp->prob = item->inside_prob + item->conts->outside_prob;
} else {
if (ps->before->start_offset == ps->before->end_offset &&
ps->before->needs_bind) {
PgfParseState* state =
pgf_new_parse_state(ps, ps->before->end_offset, BIND_HARD,
item->inside_prob+item->conts->outside_prob);
if (state != NULL) {
pgf_item_advance(item, ps->pool);
gu_buf_heap_push(state->agenda, pgf_item_prob_order, &item);
} else {
pgf_item_free(ps, item);
}
} else {
pgf_item_free(ps, item);
}
}
break;
}
case PGF_SYMBOL_SOFT_BIND:
@@ -2337,7 +2349,8 @@ pgf_parser_completions_next(GuEnum* self, void* to, GuPool* pool)
PGF_API GuEnum*
pgf_complete(PgfConcr* concr, PgfType* type, GuString sentence,
GuString prefix, GuExn *err, GuPool* pool)
GuString prefix, bool prefix_bind,
GuExn *err, GuPool* pool)
{
if (concr->sequences == NULL ||
concr->cnccats == NULL) {
@@ -2377,6 +2390,7 @@ pgf_complete(PgfConcr* concr, PgfType* type, GuString sentence,
// Now begin enumerating the completions
ps->en.next = pgf_parser_completions_next;
ps->prefix = prefix;
ps->prefix_bind = prefix_bind;
ps->tp = NULL;
return &ps->en;
}

3
src/runtime/c/pgf/pgf.h
View File

@@ -251,7 +251,8 @@ typedef struct {
PGF_API_DECL GuEnum*
pgf_complete(PgfConcr* concr, PgfType* type, GuString string,
GuString prefix, GuExn* err, GuPool* pool);
GuString prefix, bool prefix_bind,
GuExn* err, GuPool* pool);
typedef struct PgfLiteralCallback PgfLiteralCallback;

5
src/runtime/haskell-bind/PGF2.hsc
View File

@@ -1026,7 +1026,10 @@ complete lang (Type ctype _) sent pfx =
touchConcr lang
return []
else do
tok <- peekUtf8CString =<< (#peek PgfTokenProb, tok) cmpEntry
p_tok <- (#peek PgfTokenProb, tok) cmpEntry
tok <- if p_tok == nullPtr
then return "&+"
else peekUtf8CString p_tok
cat <- peekUtf8CString =<< (#peek PgfTokenProb, cat) cmpEntry
fun <- peekUtf8CString =<< (#peek PgfTokenProb, fun) cmpEntry
prob <- (#peek PgfTokenProb, prob) cmpEntry

171
src/runtime/python/pypgf.c
View File

@@ -1155,6 +1155,80 @@ Iter_fetch_expr(IterObject* self)
return res;
}
typedef struct {
PyObject_HEAD
} BINDObject;
static PyObject *BIND_instance = NULL;
static void
BIND_dealloc(PyTypeObject *self)
{
BIND_instance = NULL;
}
static PyObject *
BIND_repr(BINDObject *self)
{
return PyString_FromString("pgf.BIND");
}
static PyObject *
BIND_str(BINDObject *self)
{
return PyString_FromString("&+");
}
static PyObject *
BIND_alloc(PyTypeObject *self, Py_ssize_t nitems)
{
if (BIND_instance == NULL)
BIND_instance = PyType_GenericAlloc(self, nitems);
return BIND_instance;
}
static PyTypeObject pgf_BINDType = {
PyVarObject_HEAD_INIT(NULL, 0)
//0, /*ob_size*/
"pgf.BINDType", /*tp_name*/
sizeof(BINDObject), /*tp_basicsize*/
0, /*tp_itemsize*/
(destructor) BIND_dealloc, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
(reprfunc) BIND_repr, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash */
0, /*tp_call*/
(reprfunc) BIND_str, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
"a marker for BIND in a bracketed string", /*tp_doc*/
0, /*tp_traverse */
0, /*tp_clear */
0, /*tp_richcompare */
0, /*tp_weaklistoffset */
0, /*tp_iter */
0, /*tp_iternext */
0, /*tp_methods */
0, /*tp_members */
0, /*tp_getset */
0, /*tp_base */
0, /*tp_dict */
0, /*tp_descr_get */
0, /*tp_descr_set */
0, /*tp_dictoffset */
0, /*tp_init */
BIND_alloc, /*tp_alloc */
0, /*tp_new */
};
static PyObject*
Iter_fetch_token(IterObject* self)
{
@@ -1162,7 +1236,9 @@ Iter_fetch_token(IterObject* self)
if (tp == NULL)
return NULL;
PyObject* py_tok = PyString_FromString(tp->tok);
PyObject* py_tok =
(tp->tok != NULL) ? PyString_FromString(tp->tok)
: pgf_BINDType.tp_alloc(&pgf_BINDType, 0);
PyObject* py_cat = PyString_FromString(tp->cat);
PyObject* py_fun = PyString_FromString(tp->fun);
PyObject* res = Py_BuildValue("(f,O,O,O)", tp->prob, py_tok, py_cat, py_fun);
@@ -1599,16 +1675,18 @@ Concr_parse(ConcrObject* self, PyObject *args, PyObject *keywds)
static IterObject*
Concr_complete(ConcrObject* self, PyObject *args, PyObject *keywds)
{
static char *kwlist[] = {"sentence", "cat", "prefix", "n", NULL};
static char *kwlist[] = {"sentence", "cat", "prefix", "n", NULL};
const char *sentence = NULL;
PyObject* sentence0 = NULL;
char* sentence = NULL;
PyObject* start = NULL;
GuString prefix = "";
int max_count = -1;
if (!PyArg_ParseTupleAndKeywords(args, keywds, "s|Osi", kwlist,
&sentence, &start,
&prefix, &max_count))
return NULL;
GuString prefix = "";
bool prefix_bind = false;
int max_count = -1;
if (!PyArg_ParseTupleAndKeywords(args, keywds, "O|Osi", kwlist,
&sentence0, &start,
&prefix, &max_count))
return NULL;
IterObject* pyres = (IterObject*)
pgf_IterType.tp_alloc(&pgf_IterType, 0);
@@ -1630,6 +1708,20 @@ Concr_complete(ConcrObject* self, PyObject *args, PyObject *keywds)
GuExn* parse_err = gu_new_exn(tmp_pool);
if (PyTuple_Check(sentence0) &&
PyTuple_GET_SIZE(sentence0) == 2 &&
PyTuple_GET_ITEM(sentence0,1) == pgf_BINDType.tp_alloc(&pgf_BINDType, 0))
{
sentence0 = PyTuple_GET_ITEM(sentence0,0);
prefix_bind = true;
}
if (PyUnicode_Check(sentence0)) {
sentence = PyUnicode_AsUTF8(sentence0);
} else {
PyErr_SetString(PyExc_TypeError, "The sentence must be either a string or a tuple of string and pgf.BIND");
}
PgfType* type;
if (start == NULL) {
type = pgf_start_cat(self->grammar->pgf, pyres->pool);
@@ -1642,7 +1734,7 @@ Concr_complete(ConcrObject* self, PyObject *args, PyObject *keywds)
}
pyres->res =
pgf_complete(self->concr, type, sentence, prefix, parse_err, pyres->pool);
pgf_complete(self->concr, type, sentence, prefix, prefix_bind, parse_err, pyres->pool);
if (!gu_ok(parse_err)) {
Py_DECREF(pyres);
@@ -2077,58 +2169,6 @@ static PyTypeObject pgf_BracketType = {
0, /*tp_new */
};
typedef struct {
PyObject_HEAD
} BINDObject;
static PyObject *
BIND_repr(BINDObject *self)
{
return PyString_FromString("&+");
}
static PyTypeObject pgf_BINDType = {
PyVarObject_HEAD_INIT(NULL, 0)
//0, /*ob_size*/
"pgf.BIND", /*tp_name*/
sizeof(BINDObject), /*tp_basicsize*/
0, /*tp_itemsize*/
0, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash */
0, /*tp_call*/
(reprfunc) BIND_repr, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
"a marker for BIND in a bracketed string", /*tp_doc*/
0, /*tp_traverse */
0, /*tp_clear */
0, /*tp_richcompare */
0, /*tp_weaklistoffset */
0, /*tp_iter */
0, /*tp_iternext */
0, /*tp_methods */
0, /*tp_members */
0, /*tp_getset */
0, /*tp_base */
0, /*tp_dict */
0, /*tp_descr_get */
0, /*tp_descr_set */
0, /*tp_dictoffset */
0, /*tp_init */
0, /*tp_alloc */
0, /*tp_new */
};
typedef struct {
PgfLinFuncs* funcs;
GuBuf* stack;
@@ -2726,6 +2766,11 @@ static PyMethodDef Concr_methods[] = {
},
{"complete", (PyCFunction)Concr_complete, METH_VARARGS | METH_KEYWORDS,
"Parses a partial string and returns a list with the top n possible next tokens"
"Named arguments:\n"
"- sentence (string or a (string,pgf.BIND) tuple. The later indicates that the sentence ends with a BIND token)\n"
"- cat (string); OPTIONAL, default: the startcat of the grammar\n"
"- prefix (string); OPTIONAL, the prefix of predicted tokens"
"- n (int), max. number of predicted tokens"
},
{"parseval", (PyCFunction)Concr_parseval, METH_VARARGS,
"Computes precision, recall and exact match for the parser on a given abstract tree"
@@ -3670,7 +3715,7 @@ MOD_INIT(pgf)
PyModule_AddObject(m, "Bracket", (PyObject *) &pgf_BracketType);
Py_INCREF(&pgf_BracketType);
PyModule_AddObject(m, "BIND", (PyObject *) &pgf_BINDType);
PyModule_AddObject(m, "BIND", pgf_BINDType.tp_alloc(&pgf_BINDType, 0));
Py_INCREF(&pgf_BINDType);
return MOD_SUCCESS_VAL(m);