static int
symtable_visit_genexp(struct symtable *st, expr_ty e)
{
comprehension_ty outermost = ((comprehension_ty)
(asdl_seq_GET(e->v.GeneratorExp.generators, 0)));
/* Outermost iterator is evaluated in current scope */
VISIT(st, expr, outermost->iter);
/* Create generator scope for the rest */
if (!GET_IDENTIFIER(genexpr) ||
!symtable_enter_block(st, genexpr, FunctionBlock, (void *)e, 0)) {
return 0;
}
st->st_cur->ste_generator = 1;
/* Outermost iter is received as an argument */
if (!symtable_implicit_arg(st, 0)) {
symtable_exit_block(st, (void *)e);
return 0;
}
VISIT_IN_BLOCK(st, expr, outermost->target, (void*)e);
VISIT_SEQ_IN_BLOCK(st, expr, outermost->ifs, (void*)e);
VISIT_SEQ_TAIL_IN_BLOCK(st, comprehension,
e->v.GeneratorExp.generators, 1, (void*)e);
VISIT_IN_BLOCK(st, expr, e->v.GeneratorExp.elt, (void*)e);
return symtable_exit_block(st, (void *)e);
}
static int
symtable_visit_params(struct symtable *st, asdl_seq *args, int toplevel)
{
int i;
/* go through all the toplevel arguments first */
for (i = 0; i < asdl_seq_LEN(args); i++) {
expr_ty arg = (expr_ty)asdl_seq_GET(args, i);
if (arg->kind == Name_kind) {
assert(arg->v.Name.ctx == Param ||
(arg->v.Name.ctx == Store && !toplevel));
if (!symtable_add_def(st, arg->v.Name.id, DEF_PARAM))
return 0;
}
else if (arg->kind == Tuple_kind) {
assert(arg->v.Tuple.ctx == Store);
if (toplevel) {
if (!symtable_implicit_arg(st, i))
return 0;
}
}
else {
PyErr_SetString(PyExc_SyntaxError,
"invalid expression in parameter list");
PyErr_SyntaxLocation(st->st_filename,
st->st_cur->ste_lineno);
return 0;
}
}
if (!toplevel) {
if (!symtable_visit_params_nested(st, args))
return 0;
}
return 1;
}
static int
symtable_handle_comprehension(struct symtable *st, expr_ty e,
identifier scope_name, asdl_seq *generators,
expr_ty elt, expr_ty value)
{
int is_generator = (e->kind == GeneratorExp_kind);
int needs_tmp = !is_generator;
comprehension_ty outermost = ((comprehension_ty)
asdl_seq_GET(generators, 0));
/* Outermost iterator is evaluated in current scope */
VISIT(st, expr, outermost->iter);
/* Create comprehension scope for the rest */
if (!scope_name ||
!symtable_enter_block(st, scope_name, FunctionBlock, (void *)e, 0)) {
return 0;
}
st->st_cur->ste_generator = is_generator;
/* Outermost iter is received as an argument */
if (!symtable_implicit_arg(st, 0)) {
symtable_exit_block(st, (void *)e);
return 0;
}
/* Allocate temporary name if needed */
if (needs_tmp && !symtable_new_tmpname(st)) {
symtable_exit_block(st, (void *)e);
return 0;
}
VISIT_IN_BLOCK(st, expr, outermost->target, (void*)e);
VISIT_SEQ_IN_BLOCK(st, expr, outermost->ifs, (void*)e);
VISIT_SEQ_TAIL_IN_BLOCK(st, comprehension,
generators, 1, (void*)e);
if (value)
VISIT_IN_BLOCK(st, expr, value, (void*)e);
VISIT_IN_BLOCK(st, expr, elt, (void*)e);
return symtable_exit_block(st, (void *)e);
}