Remove three unneeded variable assignments.
Found using Clang's static analyzer.
This commit is contained in:
Brett Cannon
parent
8a478ced55
commit
0b03f10afb
141
Python/ast.c
141
Python/ast.c
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@ -454,8 +454,8 @@ set_context(struct compiling *c, expr_ty e, expr_context_ty ctx, const node *n)
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expr_name = "conditional expression";
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break;
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default:
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PyErr_Format(PyExc_SystemError,
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"unexpected expression in assignment %d (line %d)",
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PyErr_Format(PyExc_SystemError,
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"unexpected expression in assignment %d (line %d)",
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e->kind, e->lineno);
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return 0;
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}
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@ -470,7 +470,7 @@ set_context(struct compiling *c, expr_ty e, expr_context_ty ctx, const node *n)
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}
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/* If the LHS is a list or tuple, we need to set the assignment
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context for all the contained elements.
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context for all the contained elements.
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*/
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if (s) {
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int i;
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@ -723,7 +723,7 @@ ast_for_arguments(struct compiling *c, const node *n)
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ast_error(n, "parenthesized arg with default");
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goto error;
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}
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ast_error(n,
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ast_error(n,
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"non-default argument follows default argument");
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goto error;
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}
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@ -762,7 +762,7 @@ ast_for_arguments(struct compiling *c, const node *n)
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if (!name)
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goto error;
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asdl_seq_SET(args, k++, name);
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}
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i += 2; /* the name and the comma */
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if (parenthesized && Py_Py3kWarningFlag &&
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@ -842,15 +842,15 @@ ast_for_decorator(struct compiling *c, const node *n)
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/* decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE */
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expr_ty d = NULL;
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expr_ty name_expr;
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REQ(n, decorator);
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REQ(CHILD(n, 0), AT);
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REQ(RCHILD(n, -1), NEWLINE);
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name_expr = ast_for_dotted_name(c, CHILD(n, 1));
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if (!name_expr)
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return NULL;
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if (NCH(n) == 3) { /* No arguments */
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d = name_expr;
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name_expr = NULL;
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@ -878,12 +878,12 @@ ast_for_decorators(struct compiling *c, const node *n)
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asdl_seq* decorator_seq;
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expr_ty d;
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int i;
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REQ(n, decorators);
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decorator_seq = asdl_seq_new(NCH(n), c->c_arena);
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if (!decorator_seq)
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return NULL;
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for (i = 0; i < NCH(n); i++) {
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d = ast_for_decorator(c, CHILD(n, i));
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if (!d)
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@ -980,7 +980,7 @@ ast_for_lambdef(struct compiling *c, const node *n)
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static expr_ty
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ast_for_ifexpr(struct compiling *c, const node *n)
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{
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/* test: or_test 'if' or_test 'else' test */
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/* test: or_test 'if' or_test 'else' test */
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expr_ty expression, body, orelse;
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assert(NCH(n) == 5);
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@ -1097,9 +1097,9 @@ ast_for_listcomp(struct compiling *c, const node *n)
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asdl_seq *t;
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expr_ty expression;
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node *for_ch;
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REQ(ch, list_for);
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for_ch = CHILD(ch, 1);
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t = ast_for_exprlist(c, for_ch, Store);
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if (!t)
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@ -1107,7 +1107,7 @@ ast_for_listcomp(struct compiling *c, const node *n)
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expression = ast_for_testlist(c, CHILD(ch, 3));
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if (!expression)
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return NULL;
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/* Check the # of children rather than the length of t, since
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[x for x, in ... ] has 1 element in t, but still requires a Tuple.
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*/
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@ -1139,11 +1139,11 @@ ast_for_listcomp(struct compiling *c, const node *n)
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REQ(ch, list_iter);
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ch = CHILD(ch, 0);
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REQ(ch, list_if);
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list_for_expr = ast_for_expr(c, CHILD(ch, 1));
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if (!list_for_expr)
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return NULL;
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asdl_seq_SET(ifs, j, list_for_expr);
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if (NCH(ch) == 3)
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ch = CHILD(ch, 2);
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@ -1239,9 +1239,9 @@ ast_for_comprehension(struct compiling *c, const node *n)
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asdl_seq *t;
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expr_ty expression, first;
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node *for_ch;
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REQ(n, comp_for);
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for_ch = CHILD(n, 1);
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t = ast_for_exprlist(c, for_ch, Store);
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if (!t)
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@ -1265,7 +1265,7 @@ ast_for_comprehension(struct compiling *c, const node *n)
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if (NCH(n) == 5) {
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int j, n_ifs;
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asdl_seq *ifs;
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n = CHILD(n, 4);
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n_ifs = count_comp_ifs(c, n);
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if (n_ifs == -1)
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@ -1279,7 +1279,7 @@ ast_for_comprehension(struct compiling *c, const node *n)
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REQ(n, comp_iter);
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n = CHILD(n, 0);
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REQ(n, comp_if);
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expression = ast_for_expr(c, CHILD(n, 1));
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if (!expression)
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return NULL;
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@ -1302,13 +1302,13 @@ ast_for_itercomp(struct compiling *c, const node *n, int type)
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{
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expr_ty elt;
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asdl_seq *comps;
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assert(NCH(n) > 1);
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elt = ast_for_expr(c, CHILD(n, 0));
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if (!elt)
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return NULL;
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comps = ast_for_comprehension(c, CHILD(n, 1));
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if (!comps)
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return NULL;
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@ -1327,10 +1327,10 @@ ast_for_dictcomp(struct compiling *c, const node *n)
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{
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expr_ty key, value;
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asdl_seq *comps;
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assert(NCH(n) > 3);
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REQ(CHILD(n, 1), COLON);
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key = ast_for_expr(c, CHILD(n, 0));
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if (!key)
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return NULL;
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@ -1338,11 +1338,11 @@ ast_for_dictcomp(struct compiling *c, const node *n)
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value = ast_for_expr(c, CHILD(n, 2));
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if (!value)
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return NULL;
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comps = ast_for_comprehension(c, CHILD(n, 3));
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if (!comps)
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return NULL;
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return DictComp(key, value, comps, LINENO(n), n->n_col_offset, c->c_arena);
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}
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@ -1367,7 +1367,7 @@ ast_for_atom(struct compiling *c, const node *n)
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| '{' [dictmaker] '}' | '`' testlist '`' | NAME | NUMBER | STRING+
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*/
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node *ch = CHILD(n, 0);
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switch (TYPE(ch)) {
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case NAME: {
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/* All names start in Load context, but may later be
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@ -1415,20 +1415,20 @@ ast_for_atom(struct compiling *c, const node *n)
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}
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case LPAR: /* some parenthesized expressions */
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ch = CHILD(n, 1);
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if (TYPE(ch) == RPAR)
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return Tuple(NULL, Load, LINENO(n), n->n_col_offset, c->c_arena);
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if (TYPE(ch) == yield_expr)
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return ast_for_expr(c, ch);
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return ast_for_testlist_comp(c, ch);
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case LSQB: /* list (or list comprehension) */
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ch = CHILD(n, 1);
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if (TYPE(ch) == RSQB)
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return List(NULL, Load, LINENO(n), n->n_col_offset, c->c_arena);
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REQ(ch, listmaker);
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if (NCH(ch) == 1 || TYPE(CHILD(ch, 1)) == COMMA) {
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asdl_seq *elts = seq_for_testlist(c, ch);
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@ -1477,14 +1477,14 @@ ast_for_atom(struct compiling *c, const node *n)
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keys = asdl_seq_new(size, c->c_arena);
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if (!keys)
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return NULL;
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values = asdl_seq_new(size, c->c_arena);
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if (!values)
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return NULL;
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for (i = 0; i < NCH(ch); i += 4) {
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expr_ty expression;
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expression = ast_for_expr(c, CHILD(ch, i));
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if (!expression)
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return NULL;
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@ -1536,10 +1536,10 @@ ast_for_slice(struct compiling *c, const node *n)
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if (NCH(n) == 1 && TYPE(ch) == test) {
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/* 'step' variable hold no significance in terms of being used over
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other vars */
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step = ast_for_expr(c, ch);
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step = ast_for_expr(c, ch);
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if (!step)
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return NULL;
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return Index(step, c->c_arena);
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}
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@ -1573,7 +1573,7 @@ ast_for_slice(struct compiling *c, const node *n)
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ch = CHILD(n, NCH(n) - 1);
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if (TYPE(ch) == sliceop) {
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if (NCH(ch) == 1) {
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/*
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/*
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This is an extended slice (ie "x[::]") with no expression in the
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step field. We set this literally to "None" in order to
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disambiguate it from x[:]. (The interpreter might have to call
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@ -1603,7 +1603,7 @@ static expr_ty
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ast_for_binop(struct compiling *c, const node *n)
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{
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/* Must account for a sequence of expressions.
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How should A op B op C by represented?
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How should A op B op C by represented?
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BinOp(BinOp(A, op, B), op, C).
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*/
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@ -1641,10 +1641,10 @@ ast_for_binop(struct compiling *c, const node *n)
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if (!tmp)
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return NULL;
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tmp_result = BinOp(result, newoperator, tmp,
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tmp_result = BinOp(result, newoperator, tmp,
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LINENO(next_oper), next_oper->n_col_offset,
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c->c_arena);
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if (!tmp_result)
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if (!tmp_result)
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return NULL;
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result = tmp_result;
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}
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@ -1654,7 +1654,7 @@ ast_for_binop(struct compiling *c, const node *n)
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static expr_ty
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ast_for_trailer(struct compiling *c, const node *n, expr_ty left_expr)
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{
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/* trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME
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/* trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME
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subscriptlist: subscript (',' subscript)* [',']
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subscript: '.' '.' '.' | test | [test] ':' [test] [sliceop]
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*/
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@ -1685,7 +1685,7 @@ ast_for_trailer(struct compiling *c, const node *n, expr_ty left_expr)
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c->c_arena);
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}
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else {
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/* The grammar is ambiguous here. The ambiguity is resolved
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/* The grammar is ambiguous here. The ambiguity is resolved
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by treating the sequence as a tuple literal if there are
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no slice features.
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*/
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@ -1822,7 +1822,7 @@ ast_for_expr(struct compiling *c, const node *n)
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{
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/* handle the full range of simple expressions
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test: or_test ['if' or_test 'else' test] | lambdef
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or_test: and_test ('or' and_test)*
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or_test: and_test ('or' and_test)*
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and_test: not_test ('and' not_test)*
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not_test: 'not' not_test | comparison
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comparison: expr (comp_op expr)*
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@ -1839,7 +1839,7 @@ ast_for_expr(struct compiling *c, const node *n)
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to explicitly allow:
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[ x for x in lambda: 0, lambda: 1 ]
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(which would be ambiguous without these extra rules)
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old_test: or_test | old_lambdef
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old_lambdef: 'lambda' [vararglist] ':' old_test
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@ -1919,7 +1919,7 @@ ast_for_expr(struct compiling *c, const node *n)
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if (!expression) {
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return NULL;
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}
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asdl_seq_SET(ops, i / 2, newoperator);
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asdl_seq_SET(cmps, i / 2, expression);
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}
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@ -1927,7 +1927,7 @@ ast_for_expr(struct compiling *c, const node *n)
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if (!expression) {
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return NULL;
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}
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return Compare(expression, ops, cmps, LINENO(n),
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n->n_col_offset, c->c_arena);
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}
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@ -2041,7 +2041,7 @@ ast_for_call(struct compiling *c, const node *n, expr_ty func)
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if (!e)
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return NULL;
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asdl_seq_SET(args, nargs++, e);
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}
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}
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else if (TYPE(CHILD(ch, 1)) == comp_for) {
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e = ast_for_genexp(c, ch);
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if (!e)
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@ -2054,7 +2054,7 @@ ast_for_call(struct compiling *c, const node *n, expr_ty func)
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int k;
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char *tmp;
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/* CHILD(ch, 0) is test, but must be an identifier? */
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/* CHILD(ch, 0) is test, but must be an identifier? */
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e = ast_for_expr(c, CHILD(ch, 0));
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if (!e)
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return NULL;
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@ -2173,7 +2173,7 @@ static stmt_ty
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ast_for_expr_stmt(struct compiling *c, const node *n)
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{
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REQ(n, expr_stmt);
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/* expr_stmt: testlist (augassign (yield_expr|testlist)
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/* expr_stmt: testlist (augassign (yield_expr|testlist)
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| ('=' (yield_expr|testlist))*)
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testlist: test (',' test)* [',']
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augassign: '+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^='
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@ -2248,7 +2248,7 @@ ast_for_expr_stmt(struct compiling *c, const node *n)
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e = ast_for_testlist(c, ch);
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/* set context to assign */
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if (!e)
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if (!e)
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return NULL;
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if (!set_context(c, e, Store, CHILD(n, i)))
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@ -2329,7 +2329,7 @@ static stmt_ty
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ast_for_del_stmt(struct compiling *c, const node *n)
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{
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asdl_seq *expr_list;
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/* del_stmt: 'del' exprlist */
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REQ(n, del_stmt);
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@ -2413,7 +2413,7 @@ ast_for_flow_stmt(struct compiling *c, const node *n)
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expr3 = ast_for_expr(c, CHILD(ch, 5));
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if (!expr3)
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return NULL;
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return Raise(expr1, expr2, expr3, LINENO(n), n->n_col_offset,
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c->c_arena);
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}
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@ -2569,7 +2569,7 @@ ast_for_import_stmt(struct compiling *c, const node *n)
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int idx, ndots = 0;
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alias_ty mod = NULL;
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identifier modname = NULL;
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/* Count the number of dots (for relative imports) and check for the
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optional module name */
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for (idx = 1; idx < NCH(n); idx++) {
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@ -2715,7 +2715,7 @@ ast_for_assert_stmt(struct compiling *c, const node *n)
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expr2 = ast_for_expr(c, CHILD(n, 3));
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if (!expr2)
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return NULL;
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return Assert(expr1, expr2, LINENO(n), n->n_col_offset, c->c_arena);
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}
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PyErr_Format(PyExc_SystemError,
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@ -2742,7 +2742,7 @@ ast_for_suite(struct compiling *c, const node *n)
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if (TYPE(CHILD(n, 0)) == simple_stmt) {
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n = CHILD(n, 0);
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/* simple_stmt always ends with a NEWLINE,
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and may have a trailing SEMI
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and may have a trailing SEMI
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*/
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end = NCH(n) - 1;
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if (TYPE(CHILD(n, end - 1)) == SEMI)
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@ -2807,10 +2807,10 @@ ast_for_if_stmt(struct compiling *c, const node *n)
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expression = ast_for_expr(c, CHILD(n, 1));
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if (!expression)
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return NULL;
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suite_seq = ast_for_suite(c, CHILD(n, 3));
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suite_seq = ast_for_suite(c, CHILD(n, 3));
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if (!suite_seq)
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return NULL;
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return If(expression, suite_seq, NULL, LINENO(n), n->n_col_offset,
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c->c_arena);
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}
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@ -2868,8 +2868,8 @@ ast_for_if_stmt(struct compiling *c, const node *n)
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if (!suite_seq2)
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return NULL;
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asdl_seq_SET(orelse, 0,
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If(expression, suite_seq, suite_seq2,
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asdl_seq_SET(orelse, 0,
|
||||
If(expression, suite_seq, suite_seq2,
|
||||
LINENO(CHILD(n, NCH(n) - 6)),
|
||||
CHILD(n, NCH(n) - 6)->n_col_offset,
|
||||
c->c_arena));
|
||||
|
|
@ -2890,7 +2890,7 @@ ast_for_if_stmt(struct compiling *c, const node *n)
|
|||
return NULL;
|
||||
|
||||
asdl_seq_SET(newobj, 0,
|
||||
If(expression, suite_seq, orelse,
|
||||
If(expression, suite_seq, orelse,
|
||||
LINENO(CHILD(n, off)),
|
||||
CHILD(n, off)->n_col_offset, c->c_arena));
|
||||
orelse = newobj;
|
||||
|
|
@ -3089,7 +3089,7 @@ ast_for_try_stmt(struct compiling *c, const node *n)
|
|||
ast_error(n, "malformed 'try' statement");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
if (n_except > 0) {
|
||||
int i;
|
||||
stmt_ty except_st;
|
||||
|
|
@ -3190,7 +3190,7 @@ ast_for_classdef(struct compiling *c, const node *n, asdl_seq *decorator_seq)
|
|||
/* classdef: 'class' NAME ['(' testlist ')'] ':' suite */
|
||||
PyObject *classname;
|
||||
asdl_seq *bases, *s;
|
||||
|
||||
|
||||
REQ(n, classdef);
|
||||
|
||||
if (!forbidden_check(c, n, STR(CHILD(n, 1))))
|
||||
|
|
@ -3378,17 +3378,12 @@ decode_utf8(struct compiling *c, const char **sPtr, const char *end, char* encod
|
|||
static PyObject *
|
||||
decode_unicode(struct compiling *c, const char *s, size_t len, int rawmode, const char *encoding)
|
||||
{
|
||||
PyObject *v, *u;
|
||||
PyObject *v;
|
||||
PyObject *u = NULL;
|
||||
char *buf;
|
||||
char *p;
|
||||
const char *end;
|
||||
if (encoding == NULL) {
|
||||
buf = (char *)s;
|
||||
u = NULL;
|
||||
} else if (strcmp(encoding, "iso-8859-1") == 0) {
|
||||
buf = (char *)s;
|
||||
u = NULL;
|
||||
} else {
|
||||
if (encoding != NULL && strcmp(encoding, "iso-8859-1")) {
|
||||
/* check for integer overflow */
|
||||
if (len > PY_SIZE_MAX / 6)
|
||||
return NULL;
|
||||
|
|
@ -3478,7 +3473,7 @@ parsestr(struct compiling *c, const char *s)
|
|||
s++;
|
||||
len = strlen(s);
|
||||
if (len > INT_MAX) {
|
||||
PyErr_SetString(PyExc_OverflowError,
|
||||
PyErr_SetString(PyExc_OverflowError,
|
||||
"string to parse is too long");
|
||||
return NULL;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -2697,7 +2697,6 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
|
|||
Py_DECREF(*pfunc);
|
||||
*pfunc = self;
|
||||
na++;
|
||||
n++;
|
||||
} else
|
||||
Py_INCREF(func);
|
||||
sp = stack_pointer;
|
||||
|
|
|
|||
|
|
@ -1382,7 +1382,6 @@ bigcomp(U *rv, const char *s0, BCinfo *bc)
|
|||
Bigint *b, *d;
|
||||
int b2, d2, dd, i, nd, nd0, odd, p2, p5;
|
||||
|
||||
dd = 0; /* silence compiler warning about possibly unused variable */
|
||||
nd = bc->nd;
|
||||
nd0 = bc->nd0;
|
||||
p5 = nd + bc->e0;
|
||||
|
|
@ -2362,7 +2361,7 @@ _Py_dg_dtoa(double dd, int mode, int ndigits,
|
|||
|
||||
/* set pointers to NULL, to silence gcc compiler warnings and make
|
||||
cleanup easier on error */
|
||||
mlo = mhi = b = S = 0;
|
||||
mlo = mhi = S = 0;
|
||||
s0 = 0;
|
||||
|
||||
u.d = dd;
|
||||
|
|
@ -2713,8 +2712,6 @@ _Py_dg_dtoa(double dd, int mode, int ndigits,
|
|||
* and for all and pass them and a shift to quorem, so it
|
||||
* can do shifts and ors to compute the numerator for q.
|
||||
*/
|
||||
if ((i = ((s5 ? 32 - hi0bits(S->x[S->wds-1]) : 1) + s2) & 0x1f))
|
||||
i = 32 - i;
|
||||
#define iInc 28
|
||||
i = dshift(S, s2);
|
||||
b2 += i;
|
||||
|
|
|
|||
|
|
@ -28,7 +28,7 @@ getcwd(char *buf, int size)
|
|||
{
|
||||
char localbuf[MAXPATHLEN+1];
|
||||
char *ret;
|
||||
|
||||
|
||||
if (size <= 0) {
|
||||
errno = EINVAL;
|
||||
return NULL;
|
||||
|
|
@ -59,14 +59,13 @@ getcwd(char *buf, int size)
|
|||
{
|
||||
FILE *fp;
|
||||
char *p;
|
||||
int sts;
|
||||
if (size <= 0) {
|
||||
errno = EINVAL;
|
||||
return NULL;
|
||||
}
|
||||
if ((fp = popen(PWD_CMD, "r")) == NULL)
|
||||
return NULL;
|
||||
if (fgets(buf, size, fp) == NULL || (sts = pclose(fp)) != 0) {
|
||||
if (fgets(buf, size, fp) == NULL || pclose(fp) != 0) {
|
||||
errno = EACCES; /* Most likely error */
|
||||
return NULL;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -19,7 +19,7 @@
|
|||
#include <fcntl.h>
|
||||
#endif
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
#ifdef MS_WINDOWS
|
||||
|
|
@ -826,7 +826,7 @@ parse_source_module(const char *pathname, FILE *fp)
|
|||
|
||||
flags.cf_flags = 0;
|
||||
|
||||
mod = PyParser_ASTFromFile(fp, pathname, Py_file_input, 0, 0, &flags,
|
||||
mod = PyParser_ASTFromFile(fp, pathname, Py_file_input, 0, 0, &flags,
|
||||
NULL, arena);
|
||||
if (mod) {
|
||||
co = PyAST_Compile(mod, pathname, NULL, arena);
|
||||
|
|
@ -884,7 +884,7 @@ write_compiled_module(PyCodeObject *co, char *cpathname, struct stat *srcstat)
|
|||
mode_t mode = srcstat->st_mode & ~S_IEXEC;
|
||||
#else
|
||||
mode_t mode = srcstat->st_mode & ~S_IXUSR & ~S_IXGRP & ~S_IXOTH;
|
||||
#endif
|
||||
#endif
|
||||
|
||||
fp = open_exclusive(cpathname, mode);
|
||||
if (fp == NULL) {
|
||||
|
|
@ -972,7 +972,7 @@ load_source_module(char *name, char *pathname, FILE *fp)
|
|||
char *cpathname;
|
||||
PyCodeObject *co;
|
||||
PyObject *m;
|
||||
|
||||
|
||||
if (fstat(fileno(fp), &st) != 0) {
|
||||
PyErr_Format(PyExc_RuntimeError,
|
||||
"unable to get file status from '%s'",
|
||||
|
|
@ -1406,7 +1406,7 @@ find_module(char *fullname, char *subname, PyObject *path, char *buf,
|
|||
else {
|
||||
char warnstr[MAXPATHLEN+80];
|
||||
sprintf(warnstr, "Not importing directory "
|
||||
"'%.*s': missing __init__.py",
|
||||
"'%.*s': missing __init__.py",
|
||||
MAXPATHLEN, buf);
|
||||
if (PyErr_Warn(PyExc_ImportWarning,
|
||||
warnstr)) {
|
||||
|
|
@ -1427,7 +1427,7 @@ find_module(char *fullname, char *subname, PyObject *path, char *buf,
|
|||
else {
|
||||
char warnstr[MAXPATHLEN+80];
|
||||
sprintf(warnstr, "Not importing directory "
|
||||
"'%.*s': missing __init__.py",
|
||||
"'%.*s': missing __init__.py",
|
||||
MAXPATHLEN, buf);
|
||||
if (PyErr_Warn(PyExc_ImportWarning,
|
||||
warnstr)) {
|
||||
|
|
@ -2266,7 +2266,7 @@ get_parent(PyObject *globals, char *buf, Py_ssize_t *p_buflen, int level)
|
|||
modname = PyDict_GetItem(globals, namestr);
|
||||
if (modname == NULL || !PyString_Check(modname))
|
||||
return Py_None;
|
||||
|
||||
|
||||
modpath = PyDict_GetItem(globals, pathstr);
|
||||
if (modpath != NULL) {
|
||||
/* __path__ is set, so modname is already the package name */
|
||||
|
|
@ -2621,7 +2621,7 @@ PyImport_ReloadModule(PyObject *m)
|
|||
struct filedescr *fdp;
|
||||
FILE *fp = NULL;
|
||||
PyObject *newm;
|
||||
|
||||
|
||||
if (modules_reloading == NULL) {
|
||||
Py_FatalError("PyImport_ReloadModule: "
|
||||
"no modules_reloading dictionary!");
|
||||
|
|
|
|||
Loading…
Reference in New Issue