static int future_check_features(PyFutureFeatures *ff, stmt_ty s, PyObject *filename) { int i; asdl_seq *names; assert(s->kind == ImportFrom_kind); names = s->v.ImportFrom.names; for (i = 0; i < asdl_seq_LEN(names); i++) { alias_ty name = (alias_ty)asdl_seq_GET(names, i); const char *feature = PyUnicode_AsUTF8(name->name); if (!feature) return 0; if (strcmp(feature, FUTURE_NESTED_SCOPES) == 0) { continue; } else if (strcmp(feature, FUTURE_GENERATORS) == 0) { continue; } else if (strcmp(feature, FUTURE_DIVISION) == 0) { continue; } else if (strcmp(feature, FUTURE_ABSOLUTE_IMPORT) == 0) { continue; } else if (strcmp(feature, FUTURE_WITH_STATEMENT) == 0) { continue; } else if (strcmp(feature, FUTURE_PRINT_FUNCTION) == 0) { continue; } else if (strcmp(feature, FUTURE_UNICODE_LITERALS) == 0) { continue; } else if (strcmp(feature, FUTURE_BARRY_AS_BDFL) == 0) { ff->ff_features |= CO_FUTURE_BARRY_AS_BDFL; } else if (strcmp(feature, FUTURE_GENERATOR_STOP) == 0) { continue; } else if (strcmp(feature, FUTURE_ANNOTATIONS) == 0) { ff->ff_features |= CO_FUTURE_ANNOTATIONS; } else if (strcmp(feature, "braces") == 0) { PyErr_SetString(PyExc_SyntaxError, "not a chance"); PyErr_SyntaxLocationObject(filename, s->lineno, s->col_offset); return 0; } else { PyErr_Format(PyExc_SyntaxError, UNDEFINED_FUTURE_FEATURE, feature); PyErr_SyntaxLocationObject(filename, s->lineno, s->col_offset); return 0; } } return 1; }
static int future_parse(PyFutureFeatures *ff, mod_ty mod, PyObject *filename) { int i, done = 0, prev_line = 0; if (!(mod->kind == Module_kind || mod->kind == Interactive_kind)) return 1; if (asdl_seq_LEN(mod->v.Module.body) == 0) return 1; /* A subsequent pass will detect future imports that don't appear at the beginning of the file. There's one case, however, that is easier to handle here: A series of imports joined by semi-colons, where the first import is a future statement but some subsequent import has the future form but is preceded by a regular import. */ i = 0; if (_PyAST_GetDocString(mod->v.Module.body) != NULL) i++; for (; i < asdl_seq_LEN(mod->v.Module.body); i++) { stmt_ty s = (stmt_ty)asdl_seq_GET(mod->v.Module.body, i); if (done && s->lineno > prev_line) return 1; prev_line = s->lineno; /* The tests below will return from this function unless it is still possible to find a future statement. The only things that can precede a future statement are another future statement and a doc string. */ if (s->kind == ImportFrom_kind) { identifier modname = s->v.ImportFrom.module; if (modname && _PyUnicode_EqualToASCIIString(modname, "__future__")) { if (done) { PyErr_SetString(PyExc_SyntaxError, ERR_LATE_FUTURE); PyErr_SyntaxLocationObject(filename, s->lineno, s->col_offset); return 0; } if (!future_check_features(ff, s, filename)) return 0; ff->ff_lineno = s->lineno; } else { done = 1; } } else { done = 1; } } return 1; }
void PyErr_SyntaxLocationEx(const char *filename, int lineno, int col_offset) { PyObject *fileobj; if (filename != NULL) { fileobj = PyUnicode_DecodeFSDefault(filename); if (fileobj == NULL) PyErr_Clear(); } else fileobj = NULL; PyErr_SyntaxLocationObject(fileobj, lineno, col_offset); Py_XDECREF(fileobj); }