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bpo-46042: Improve SyntaxError locations in the symbol table (GH-30059) (GH-30064)

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(cherry picked from commit 59435eea08)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
This commit is contained in:
Miss Islington (bot) 2021-12-11 17:24:12 -08:00 • committed by GitHub
parent 991736697d
commit 438817fdd5
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5 changed files with 869 additions and 826 deletions
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143
Python/symtable.c
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@ -49,6 +49,12 @@
"'%s' can not be used within an annotation"
#define LOCATION(x) \
(x)->lineno, (x)->col_offset, (x)->end_lineno, (x)->end_col_offset
#define ST_LOCATION(x) \
(x)->ste_lineno, (x)->ste_col_offset, (x)->ste_end_lineno, (x)->ste_end_col_offset
static PySTEntryObject *
ste_new(struct symtable *st, identifier name, _Py_block_ty block,
void *key, int lineno, int col_offset,
@ -96,7 +102,7 @@ ste_new(struct symtable *st, identifier name, _Py_block_ty block,
ste->ste_child_free = 0;
ste->ste_generator = 0;
ste->ste_coroutine = 0;
ste->ste_comprehension = 0;
ste->ste_comprehension = NoComprehension;
ste->ste_returns_value = 0;
ste->ste_needs_class_closure = 0;
ste->ste_comp_iter_target = 0;
@ -221,6 +227,7 @@ static int symtable_visit_withitem(struct symtable *st, withitem_ty item);
static int symtable_visit_match_case(struct symtable *st, match_case_ty m);
static int symtable_visit_pattern(struct symtable *st, pattern_ty s);
static int symtable_raise_if_annotation_block(struct symtable *st, const char *, expr_ty);
static int symtable_raise_if_comprehension_block(struct symtable *st, expr_ty);
static identifier top = NULL, lambda = NULL, genexpr = NULL,
@ -1024,7 +1031,8 @@ symtable_lookup(struct symtable *st, PyObject *name)
}
static int
symtable_add_def_helper(struct symtable *st, PyObject *name, int flag, struct _symtable_entry *ste)
symtable_add_def_helper(struct symtable *st, PyObject *name, int flag, struct _symtable_entry *ste,
int lineno, int col_offset, int end_lineno, int end_col_offset)
{
PyObject *o;
PyObject *dict;
@ -1041,10 +1049,8 @@ symtable_add_def_helper(struct symtable *st, PyObject *name, int flag, struct _s
/* Is it better to use 'mangled' or 'name' here? */
PyErr_Format(PyExc_SyntaxError, DUPLICATE_ARGUMENT, name);
PyErr_RangedSyntaxLocationObject(st->st_filename,
ste->ste_lineno,
ste->ste_col_offset + 1,
ste->ste_end_lineno,
ste->ste_end_col_offset + 1);
lineno, col_offset + 1,
end_lineno, end_col_offset + 1);
goto error;
}
val |= flag;
@ -1065,10 +1071,8 @@ symtable_add_def_helper(struct symtable *st, PyObject *name, int flag, struct _s
PyErr_Format(PyExc_SyntaxError,
NAMED_EXPR_COMP_INNER_LOOP_CONFLICT, name);
PyErr_RangedSyntaxLocationObject(st->st_filename,
ste->ste_lineno,
ste->ste_col_offset + 1,
ste->ste_end_lineno,
ste->ste_end_col_offset + 1);
lineno, col_offset + 1,
end_lineno, end_col_offset + 1);
goto error;
}
val |= DEF_COMP_ITER;
@ -1113,8 +1117,11 @@ error:
}
static int
symtable_add_def(struct symtable *st, PyObject *name, int flag) {
return symtable_add_def_helper(st, name, flag, st->st_cur);
symtable_add_def(struct symtable *st, PyObject *name, int flag,
int lineno, int col_offset, int end_lineno, int end_col_offset)
{
return symtable_add_def_helper(st, name, flag, st->st_cur,
lineno, col_offset, end_lineno, end_col_offset);
}
/* VISIT, VISIT_SEQ and VIST_SEQ_TAIL take an ASDL type as their second argument.
@ -1199,7 +1206,7 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
}
switch (s->kind) {
case FunctionDef_kind:
if (!symtable_add_def(st, s->v.FunctionDef.name, DEF_LOCAL))
if (!symtable_add_def(st, s->v.FunctionDef.name, DEF_LOCAL, LOCATION(s)))
VISIT_QUIT(st, 0);
if (s->v.FunctionDef.args->defaults)
VISIT_SEQ(st, expr, s->v.FunctionDef.args->defaults);
@ -1212,8 +1219,7 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
VISIT_SEQ(st, expr, s->v.FunctionDef.decorator_list);
if (!symtable_enter_block(st, s->v.FunctionDef.name,
FunctionBlock, (void *)s,
s->lineno, s->col_offset,
s->end_lineno, s->end_col_offset))
LOCATION(s)))
VISIT_QUIT(st, 0);
VISIT(st, arguments, s->v.FunctionDef.args);
VISIT_SEQ(st, stmt, s->v.FunctionDef.body);
@ -1222,7 +1228,7 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
break;
case ClassDef_kind: {
PyObject *tmp;
if (!symtable_add_def(st, s->v.ClassDef.name, DEF_LOCAL))
if (!symtable_add_def(st, s->v.ClassDef.name, DEF_LOCAL, LOCATION(s)))
VISIT_QUIT(st, 0);
VISIT_SEQ(st, expr, s->v.ClassDef.bases);
VISIT_SEQ(st, keyword, s->v.ClassDef.keywords);
@ -1275,12 +1281,12 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
}
if (s->v.AnnAssign.simple &&
!symtable_add_def(st, e_name->v.Name.id,
DEF_ANNOT | DEF_LOCAL)) {
DEF_ANNOT | DEF_LOCAL, LOCATION(e_name))) {
VISIT_QUIT(st, 0);
}
else {
if (s->v.AnnAssign.value
&& !symtable_add_def(st, e_name->v.Name.id, DEF_LOCAL)) {
&& !symtable_add_def(st, e_name->v.Name.id, DEF_LOCAL, LOCATION(e_name))) {
VISIT_QUIT(st, 0);
}
}
@ -1377,7 +1383,7 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
s->end_col_offset + 1);
VISIT_QUIT(st, 0);
}
if (!symtable_add_def(st, name, DEF_GLOBAL))
if (!symtable_add_def(st, name, DEF_GLOBAL, LOCATION(s)))
VISIT_QUIT(st, 0);
if (!symtable_record_directive(st, name, s->lineno, s->col_offset,
s->end_lineno, s->end_col_offset))
@ -1412,7 +1418,7 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
s->end_col_offset + 1);
VISIT_QUIT(st, 0);
}
if (!symtable_add_def(st, name, DEF_NONLOCAL))
if (!symtable_add_def(st, name, DEF_NONLOCAL, LOCATION(s)))
VISIT_QUIT(st, 0);
if (!symtable_record_directive(st, name, s->lineno, s->col_offset,
s->end_lineno, s->end_col_offset))
@ -1433,7 +1439,7 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
VISIT_SEQ(st, stmt, s->v.With.body);
break;
case AsyncFunctionDef_kind:
if (!symtable_add_def(st, s->v.AsyncFunctionDef.name, DEF_LOCAL))
if (!symtable_add_def(st, s->v.AsyncFunctionDef.name, DEF_LOCAL, LOCATION(s)))
VISIT_QUIT(st, 0);
if (s->v.AsyncFunctionDef.args->defaults)
VISIT_SEQ(st, expr, s->v.AsyncFunctionDef.args->defaults);
@ -1508,27 +1514,25 @@ symtable_extend_namedexpr_scope(struct symtable *st, expr_ty e)
if (ste->ste_type == FunctionBlock) {
long target_in_scope = _PyST_GetSymbol(ste, target_name);
if (target_in_scope & DEF_GLOBAL) {
if (!symtable_add_def(st, target_name, DEF_GLOBAL))
if (!symtable_add_def(st, target_name, DEF_GLOBAL, LOCATION(e)))
VISIT_QUIT(st, 0);
} else {
if (!symtable_add_def(st, target_name, DEF_NONLOCAL))
if (!symtable_add_def(st, target_name, DEF_NONLOCAL, LOCATION(e)))
VISIT_QUIT(st, 0);
}
if (!symtable_record_directive(st, target_name, e->lineno, e->col_offset,
e->end_lineno, e->end_col_offset))
if (!symtable_record_directive(st, target_name, LOCATION(e)))
VISIT_QUIT(st, 0);
return symtable_add_def_helper(st, target_name, DEF_LOCAL, ste);
return symtable_add_def_helper(st, target_name, DEF_LOCAL, ste, LOCATION(e));
}
/* If we find a ModuleBlock entry, add as GLOBAL */
if (ste->ste_type == ModuleBlock) {
if (!symtable_add_def(st, target_name, DEF_GLOBAL))
if (!symtable_add_def(st, target_name, DEF_GLOBAL, LOCATION(e)))
VISIT_QUIT(st, 0);
if (!symtable_record_directive(st, target_name, e->lineno, e->col_offset,
e->end_lineno, e->end_col_offset))
if (!symtable_record_directive(st, target_name, LOCATION(e)))
VISIT_QUIT(st, 0);
return symtable_add_def_helper(st, target_name, DEF_GLOBAL, ste);
return symtable_add_def_helper(st, target_name, DEF_GLOBAL, ste, LOCATION(e));
}
/* Disallow usage in ClassBlock */
if (ste->ste_type == ClassBlock) {
@ -1651,6 +1655,9 @@ symtable_visit_expr(struct symtable *st, expr_ty e)
if (e->v.Yield.value)
VISIT(st, expr, e->v.Yield.value);
st->st_cur->ste_generator = 1;
if (st->st_cur->ste_comprehension) {
return symtable_raise_if_comprehension_block(st, e);
}
break;
case YieldFrom_kind:
if (!symtable_raise_if_annotation_block(st, "yield expression", e)) {
@ -1658,6 +1665,9 @@ symtable_visit_expr(struct symtable *st, expr_ty e)
}
VISIT(st, expr, e->v.YieldFrom.value);
st->st_cur->ste_generator = 1;
if (st->st_cur->ste_comprehension) {
return symtable_raise_if_comprehension_block(st, e);
}
break;
case Await_kind:
if (!symtable_raise_if_annotation_block(st, "await expression", e)) {
@ -1707,14 +1717,14 @@ symtable_visit_expr(struct symtable *st, expr_ty e)
break;
case Name_kind:
if (!symtable_add_def(st, e->v.Name.id,
e->v.Name.ctx == Load ? USE : DEF_LOCAL))
e->v.Name.ctx == Load ? USE : DEF_LOCAL, LOCATION(e)))
VISIT_QUIT(st, 0);
/* Special-case super: it counts as a use of __class__ */
if (e->v.Name.ctx == Load &&
st->st_cur->ste_type == FunctionBlock &&
_PyUnicode_EqualToASCIIString(e->v.Name.id, "super")) {
if (!GET_IDENTIFIER(__class__) ||
!symtable_add_def(st, __class__, USE))
!symtable_add_def(st, __class__, USE, LOCATION(e)))
VISIT_QUIT(st, 0);
}
break;
@ -1749,14 +1759,14 @@ symtable_visit_pattern(struct symtable *st, pattern_ty p)
break;
case MatchStar_kind:
if (p->v.MatchStar.name) {
symtable_add_def(st, p->v.MatchStar.name, DEF_LOCAL);
symtable_add_def(st, p->v.MatchStar.name, DEF_LOCAL, LOCATION(p));
}
break;
case MatchMapping_kind:
VISIT_SEQ(st, expr, p->v.MatchMapping.keys);
VISIT_SEQ(st, pattern, p->v.MatchMapping.patterns);
if (p->v.MatchMapping.rest) {
symtable_add_def(st, p->v.MatchMapping.rest, DEF_LOCAL);
symtable_add_def(st, p->v.MatchMapping.rest, DEF_LOCAL, LOCATION(p));
}
break;
case MatchClass_kind:
@ -1769,7 +1779,7 @@ symtable_visit_pattern(struct symtable *st, pattern_ty p)
VISIT(st, pattern, p->v.MatchAs.pattern);
}
if (p->v.MatchAs.name) {
symtable_add_def(st, p->v.MatchAs.name, DEF_LOCAL);
symtable_add_def(st, p->v.MatchAs.name, DEF_LOCAL, LOCATION(p));
}
break;
case MatchOr_kind:
@ -1785,7 +1795,7 @@ symtable_implicit_arg(struct symtable *st, int pos)
PyObject *id = PyUnicode_FromFormat(".%d", pos);
if (id == NULL)
return 0;
if (!symtable_add_def(st, id, DEF_PARAM)) {
if (!symtable_add_def(st, id, DEF_PARAM, ST_LOCATION(st->st_cur))) {
Py_DECREF(id);
return 0;
}
@ -1803,7 +1813,7 @@ symtable_visit_params(struct symtable *st, asdl_arg_seq *args)
for (i = 0; i < asdl_seq_LEN(args); i++) {
arg_ty arg = (arg_ty)asdl_seq_GET(args, i);
if (!symtable_add_def(st, arg->arg, DEF_PARAM))
if (!symtable_add_def(st, arg->arg, DEF_PARAM, LOCATION(arg)))
return 0;
}
@ -1887,12 +1897,12 @@ symtable_visit_arguments(struct symtable *st, arguments_ty a)
if (a->kwonlyargs && !symtable_visit_params(st, a->kwonlyargs))
return 0;
if (a->vararg) {
if (!symtable_add_def(st, a->vararg->arg, DEF_PARAM))
if (!symtable_add_def(st, a->vararg->arg, DEF_PARAM, LOCATION(a->vararg)))
return 0;
st->st_cur->ste_varargs = 1;
}
if (a->kwarg) {
if (!symtable_add_def(st, a->kwarg->arg, DEF_PARAM))
if (!symtable_add_def(st, a->kwarg->arg, DEF_PARAM, LOCATION(a->kwarg)))
return 0;
st->st_cur->ste_varkeywords = 1;
}
@ -1906,7 +1916,7 @@ symtable_visit_excepthandler(struct symtable *st, excepthandler_ty eh)
if (eh->v.ExceptHandler.type)
VISIT(st, expr, eh->v.ExceptHandler.type);
if (eh->v.ExceptHandler.name)
if (!symtable_add_def(st, eh->v.ExceptHandler.name, DEF_LOCAL))
if (!symtable_add_def(st, eh->v.ExceptHandler.name, DEF_LOCAL, LOCATION(eh)))
return 0;
VISIT_SEQ(st, stmt, eh->v.ExceptHandler.body);
return 1;
@ -1954,16 +1964,16 @@ symtable_visit_alias(struct symtable *st, alias_ty a)
Py_INCREF(store_name);
}
if (!_PyUnicode_EqualToASCIIString(name, "*")) {
int r = symtable_add_def(st, store_name, DEF_IMPORT);
int r = symtable_add_def(st, store_name, DEF_IMPORT, LOCATION(a));
Py_DECREF(store_name);
return r;
}
else {
if (st->st_cur->ste_type != ModuleBlock) {
int lineno = st->st_cur->ste_lineno;
int col_offset = st->st_cur->ste_col_offset;
int end_lineno = st->st_cur->ste_end_lineno;
int end_col_offset = st->st_cur->ste_end_col_offset;
int lineno = a->lineno;
int col_offset = a->col_offset;
int end_lineno = a->end_lineno;
int end_col_offset = a->end_col_offset;
PyErr_SetString(PyExc_SyntaxError, IMPORT_STAR_WARNING);
PyErr_RangedSyntaxLocationObject(st->st_filename,
lineno, col_offset + 1,
@ -2021,10 +2031,23 @@ symtable_handle_comprehension(struct symtable *st, expr_ty e,
e->end_lineno, e->end_col_offset)) {
return 0;
}
switch(e->kind) {
case ListComp_kind:
st->st_cur->ste_comprehension = ListComprehension;
break;
case SetComp_kind:
st->st_cur->ste_comprehension = SetComprehension;
break;
case DictComp_kind:
st->st_cur->ste_comprehension = DictComprehension;
break;
default:
st->st_cur->ste_comprehension = GeneratorExpression;
break;
}
if (outermost->is_async) {
st->st_cur->ste_coroutine = 1;
}
st->st_cur->ste_comprehension = 1;
/* Outermost iter is received as an argument */
if (!symtable_implicit_arg(st, 0)) {
@ -2041,20 +2064,6 @@ symtable_handle_comprehension(struct symtable *st, expr_ty e,
if (value)
VISIT(st, expr, value);
VISIT(st, expr, elt);
if (st->st_cur->ste_generator) {
PyErr_SetString(PyExc_SyntaxError,
(e->kind == ListComp_kind) ? "'yield' inside list comprehension" :
(e->kind == SetComp_kind) ? "'yield' inside set comprehension" :
(e->kind == DictComp_kind) ? "'yield' inside dict comprehension" :
"'yield' inside generator expression");
PyErr_RangedSyntaxLocationObject(st->st_filename,
st->st_cur->ste_lineno,
st->st_cur->ste_col_offset + 1,
st->st_cur->ste_end_lineno,
st->st_cur->ste_end_col_offset + 1);
symtable_exit_block(st);
return 0;
}
st->st_cur->ste_generator = is_generator;
return symtable_exit_block(st);
}
@ -2108,6 +2117,20 @@ symtable_raise_if_annotation_block(struct symtable *st, const char *name, expr_t
return 0;
}
static int
symtable_raise_if_comprehension_block(struct symtable *st, expr_ty e) {
_Py_comprehension_ty type = st->st_cur->ste_comprehension;
PyErr_SetString(PyExc_SyntaxError,
(type == ListComprehension) ? "'yield' inside list comprehension" :
(type == SetComprehension) ? "'yield' inside set comprehension" :
(type == DictComprehension) ? "'yield' inside dict comprehension" :
"'yield' inside generator expression");
PyErr_RangedSyntaxLocationObject(st->st_filename,
e->lineno, e->col_offset + 1,
e->end_lineno, e->end_col_offset + 1);
VISIT_QUIT(st, 0);
}
struct symtable *
_Py_SymtableStringObjectFlags(const char *str, PyObject *filename,
int start, PyCompilerFlags *flags)