PEP 342 implementation. Per Guido's comments, the generator throw()

method still needs to support string exceptions, and allow None for the
third argument.  Documentation updates are needed, too.

4 files changed, 212 insertions, 126 deletions

diff --git a/Python/ceval.c b/Python/ceval.c
index 1103dfc..d311537 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -499,7 +499,14 @@ PyEval_EvalCode(PyCodeObject *co, PyObject *globals, PyObject *locals)
 /* Interpreter main loop */
 
 PyObject *
-PyEval_EvalFrame(PyFrameObject *f)
+PyEval_EvalFrame(PyFrameObject *f) {
+	/* This is for backward compatibility with extension modules that
+           used this API; core interpreter code should call PyEval_EvalFrameEx() */
+	return PyEval_EvalFrameEx(f, 0);
+}
+
+PyObject *
+PyEval_EvalFrameEx(PyFrameObject *f, int throw)
 {
 #ifdef DXPAIRS
 	int lastopcode = 0;
@@ -747,6 +754,11 @@ PyEval_EvalFrame(PyFrameObject *f)
 	x = Py_None;	/* Not a reference, just anything non-NULL */
 	w = NULL;
 
+	if (throw) { /* support for generator.throw() */
+		why = WHY_EXCEPTION;
+		goto on_error;
+	}
+		
 	for (;;) {
 #ifdef WITH_TSC
 		if (inst1 == 0) {
@@ -2733,7 +2745,7 @@ PyEval_EvalCodeEx(PyCodeObject *co, PyObject *globals, PyObject *locals,
 		return PyGen_New(f);
 	}
 
-        retval = PyEval_EvalFrame(f);
+        retval = PyEval_EvalFrameEx(f,0);
 
   fail: /* Jump here from prelude on failure */
 
@@ -3636,7 +3648,7 @@ fast_function(PyObject *func, PyObject ***pp_stack, int n, int na, int nk)
 			Py_INCREF(*stack);
 			fastlocals[i] = *stack++;
 		}
-		retval = PyEval_EvalFrame(f);
+		retval = PyEval_EvalFrameEx(f,0);
 		assert(tstate != NULL);
 		++tstate->recursion_depth;
 		Py_DECREF(f);
diff --git a/Python/compile.c b/Python/compile.c
index 476dbe6..56b3a3e 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -2145,6 +2145,7 @@ com_gen_for(struct compiling *c, node *n, node *t, int is_outmost)
 	else {
 		com_test(c, t);
 		com_addbyte(c, YIELD_VALUE);
+		com_addbyte(c, POP_TOP);
 		com_pop(c, 1);
 	}
 
@@ -2193,6 +2194,7 @@ com_gen_if(struct compiling *c, node *n, node *t)
 	else {
 		com_test(c, t);
 		com_addbyte(c, YIELD_VALUE);
+		com_addbyte(c, POP_TOP);
 		com_pop(c, 1);
 	}
 	com_addfwref(c, JUMP_FORWARD, &anchor);
@@ -2354,6 +2356,10 @@ com_dictmaker(struct compiling *c, node *n)
 	}
 }
 
+
+/* forward reference */
+static void com_yield_expr(struct compiling *c, node *n);
+
 static void
 com_atom(struct compiling *c, node *n)
 {
@@ -2369,7 +2375,10 @@ com_atom(struct compiling *c, node *n)
 			com_push(c, 1);
 		}
 		else
-			com_testlist_gexp(c, CHILD(n, 1));
+			if (TYPE(CHILD(n, 1)) == yield_expr)
+				com_yield_expr(c, CHILD(n, 1));
+			else
+				com_testlist_gexp(c, CHILD(n, 1));
 		break;
 	case LSQB: /* '[' [listmaker] ']' */
 		if (TYPE(CHILD(n, 1)) == RSQB) {
@@ -3436,7 +3445,11 @@ com_assign(struct compiling *c, node *n, int assigning, node *augn)
 			}
 			n = CHILD(n, 0);
 			break;
-		
+		case yield_expr:
+			com_error(c, PyExc_SyntaxError,
+			  "assignment to yield expression not possible");
+			return;
+					
 		case test:
 		case and_test:
 		case not_test:
@@ -3493,7 +3506,7 @@ com_assign(struct compiling *c, node *n, int assigning, node *augn)
 				}
 				if (assigning > OP_APPLY) {
 					com_error(c, PyExc_SyntaxError,
-				  "augmented assign to tuple literal or generator expression not possible");
+				  "augmented assign to tuple literal, yield, or generator expression not possible");
 					return;
 				}
 				break;
@@ -3729,27 +3742,42 @@ com_return_stmt(struct compiling *c, node *n)
 }
 
 static void
-com_yield_stmt(struct compiling *c, node *n)
+com_yield_expr(struct compiling *c, node *n)
 {
 	int i;
-	REQ(n, yield_stmt); /* 'yield' testlist */
+	REQ(n, yield_expr); /* 'yield' testlist */
 	if (!c->c_infunction) {
 		com_error(c, PyExc_SyntaxError, "'yield' outside function");
 	}
 	
-	for (i = 0; i < c->c_nblocks; ++i) {
+	/* for (i = 0; i < c->c_nblocks; ++i) {
 		if (c->c_block[i] == SETUP_FINALLY) {
 			com_error(c, PyExc_SyntaxError,
 				  "'yield' not allowed in a 'try' block "
 				  "with a 'finally' clause");
 			return;
 		}
+	} */
+
+	if (NCH(n) < 2) {
+		com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None));
+		com_push(c, 1);
 	}
-	com_node(c, CHILD(n, 1));
+	else
+		com_node(c, CHILD(n, 1));
 	com_addbyte(c, YIELD_VALUE);
+}
+
+static void
+com_yield_stmt(struct compiling *c, node *n)
+{
+	REQ(n, yield_stmt); /* yield_expr */
+	com_node(c, CHILD(n, 0));
+	com_addbyte(c, POP_TOP);
 	com_pop(c, 1);
 }
 
+
 static void
 com_raise_stmt(struct compiling *c, node *n)
 {
@@ -4768,6 +4796,10 @@ com_node(struct compiling *c, node *n)
 	
 	/* Expression nodes */
 	
+	case yield_expr:
+		com_yield_expr(c, n);
+		break;
+
 	case testlist:
 	case testlist1:
 	case testlist_safe:
@@ -5027,7 +5059,9 @@ compile_generator_expression(struct compiling *c, node *n)
 	REQ(CHILD(n, 1), gen_for); 
 
 	c->c_name = "<generator expression>";
+	c->c_infunction = 1;
 	com_gen_for(c, CHILD(n, 1), CHILD(n, 0), 1);
+	c->c_infunction = 0;
 
 	com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None));
 	com_push(c, 1);
@@ -6115,7 +6149,7 @@ symtable_add_def_o(struct symtable *st, PyObject *dict,
 
 #define symtable_add_use(ST, NAME) symtable_add_def((ST), (NAME), USE)
 
-/* Look for a yield stmt under n.  Return 1 if found, else 0.
+/* Look for a yield stmt or expr under n.  Return 1 if found, else 0.
    This hack is used to look inside "if 0:" blocks (which are normally
    ignored) in case those are the only places a yield occurs (so that this
    function is a generator). */
@@ -6137,6 +6171,7 @@ look_for_yield(node *n)
 			return 0;
 
 		case yield_stmt:
+		case yield_expr:
 			return GENERATOR;
 
 		default:
@@ -6247,8 +6282,10 @@ symtable_node(struct symtable *st, node *n)
 	case del_stmt:
 		symtable_assign(st, CHILD(n, 1), 0);
 		break;
-	case yield_stmt:
+	case yield_expr:
 		st->st_cur->ste_generator = 1;
+		if (NCH(n)==1) 
+			break;
 		n = CHILD(n, 1);
 		goto loop;
 	case expr_stmt:
@@ -6341,9 +6378,15 @@ symtable_node(struct symtable *st, node *n)
 		/* fall through */
 
 	case atom:
-		if (TYPE(n) == atom && TYPE(CHILD(n, 0)) == NAME) {
-			symtable_add_use(st, STR(CHILD(n, 0)));
-			break;
+		if (TYPE(n) == atom) {
+			if (TYPE(CHILD(n, 0)) == NAME) {
+				symtable_add_use(st, STR(CHILD(n, 0)));
+				break;
+			}
+			else if (TYPE(CHILD(n,0)) == LPAR) {
+				n = CHILD(n,1);
+				goto loop;
+			}
 		}
 		/* fall through */
 	default:
@@ -6739,6 +6782,15 @@ symtable_assign(struct symtable *st, node *n, int def_flag)
 			symtable_add_def(st, STR(tmp), DEF_LOCAL | def_flag);
 		}
 		return;
+
+	case yield_expr:
+		st->st_cur->ste_generator = 1;
+		if (NCH(n)==2) {
+			n = CHILD(n, 1);
+			goto loop;
+		}
+		return;
+
 	case dotted_as_name:
 		if (NCH(n) == 3)
 			symtable_add_def(st, STR(CHILD(n, 2)),
diff --git a/Python/exceptions.c b/Python/exceptions.c
index 2fd74bc..2e7c820 100644
--- a/Python/exceptions.c
+++ b/Python/exceptions.c
@@ -57,6 +57,7 @@ Exception\n\
  |\n\
  +-- SystemExit\n\
  +-- StopIteration\n\
+ +-- GeneratorExit\n\
  +-- StandardError\n\
  |    |\n\
  |    +-- KeyboardInterrupt\n\
@@ -394,6 +395,7 @@ PyDoc_STRVAR(StandardError__doc__,
 PyDoc_STRVAR(TypeError__doc__, "Inappropriate argument type.");
 
 PyDoc_STRVAR(StopIteration__doc__, "Signal the end from iterator.next().");
+PyDoc_STRVAR(GeneratorExit__doc__, "Request that a generator exit.");
 
 
 
@@ -1583,6 +1585,7 @@ static PyMethodDef functions[] = {
 
 PyObject *PyExc_Exception;
 PyObject *PyExc_StopIteration;
+PyObject *PyExc_GeneratorExit;
 PyObject *PyExc_StandardError;
 PyObject *PyExc_ArithmeticError;
 PyObject *PyExc_LookupError;
@@ -1657,6 +1660,8 @@ static struct {
  {"Exception", &PyExc_Exception},
  {"StopIteration", &PyExc_StopIteration, &PyExc_Exception,
   StopIteration__doc__},
+ {"GeneratorExit", &PyExc_GeneratorExit, &PyExc_Exception,
+  GeneratorExit__doc__},
  {"StandardError", &PyExc_StandardError, &PyExc_Exception,
   StandardError__doc__},
  {"TypeError", &PyExc_TypeError, 0, TypeError__doc__},
diff --git a/Python/graminit.c b/Python/graminit.c
index 464f0ae..91d20f2 100644
--- a/Python/graminit.c
+++ b/Python/graminit.c
@@ -279,10 +279,12 @@ static arc arcs_13_1[3] = {
 	{25, 3},
 	{0, 1},
 };
-static arc arcs_13_2[1] = {
+static arc arcs_13_2[2] = {
+	{43, 4},
 	{9, 4},
 };
-static arc arcs_13_3[1] = {
+static arc arcs_13_3[2] = {
+	{43, 5},
 	{9, 5},
 };
 static arc arcs_13_4[1] = {
@@ -295,13 +297,12 @@ static arc arcs_13_5[2] = {
 static state states_13[6] = {
 	{1, arcs_13_0},
 	{3, arcs_13_1},
-	{1, arcs_13_2},
-	{1, arcs_13_3},
+	{2, arcs_13_2},
+	{2, arcs_13_3},
 	{1, arcs_13_4},
 	{2, arcs_13_5},
 };
 static arc arcs_14_0[12] = {
-	{43, 1},
 	{44, 1},
 	{45, 1},
 	{46, 1},
@@ -313,6 +314,7 @@ static arc arcs_14_0[12] = {
 	{52, 1},
 	{53, 1},
 	{54, 1},
+	{55, 1},
 };
 static arc arcs_14_1[1] = {
 	{0, 1},
@@ -322,11 +324,11 @@ static state states_14[2] = {
 	{1, arcs_14_1},
 };
 static arc arcs_15_0[1] = {
-	{55, 1},
+	{56, 1},
 };
 static arc arcs_15_1[3] = {
 	{26, 2},
-	{56, 3},
+	{57, 3},
 	{0, 1},
 };
 static arc arcs_15_2[2] = {
@@ -367,10 +369,10 @@ static state states_15[9] = {
 	{2, arcs_15_8},
 };
 static arc arcs_16_0[1] = {
-	{57, 1},
+	{58, 1},
 };
 static arc arcs_16_1[1] = {
-	{58, 2},
+	{59, 2},
 };
 static arc arcs_16_2[1] = {
 	{0, 2},
@@ -381,7 +383,7 @@ static state states_16[3] = {
 	{1, arcs_16_2},
 };
 static arc arcs_17_0[1] = {
-	{59, 1},
+	{60, 1},
 };
 static arc arcs_17_1[1] = {
 	{0, 1},
@@ -391,11 +393,11 @@ static state states_17[2] = {
 	{1, arcs_17_1},
 };
 static arc arcs_18_0[5] = {
-	{60, 1},
 	{61, 1},
 	{62, 1},
 	{63, 1},
 	{64, 1},
+	{65, 1},
 };
 static arc arcs_18_1[1] = {
 	{0, 1},
@@ -405,7 +407,7 @@ static state states_18[2] = {
 	{1, arcs_18_1},
 };
 static arc arcs_19_0[1] = {
-	{65, 1},
+	{66, 1},
 };
 static arc arcs_19_1[1] = {
 	{0, 1},
@@ -415,7 +417,7 @@ static state states_19[2] = {
 	{1, arcs_19_1},
 };
 static arc arcs_20_0[1] = {
-	{66, 1},
+	{67, 1},
 };
 static arc arcs_20_1[1] = {
 	{0, 1},
@@ -425,7 +427,7 @@ static state states_20[2] = {
 	{1, arcs_20_1},
 };
 static arc arcs_21_0[1] = {
-	{67, 1},
+	{68, 1},
 };
 static arc arcs_21_1[2] = {
 	{9, 2},
@@ -440,18 +442,14 @@ static state states_21[3] = {
 	{1, arcs_21_2},
 };
 static arc arcs_22_0[1] = {
-	{68, 1},
+	{43, 1},
 };
 static arc arcs_22_1[1] = {
-	{9, 2},
-};
-static arc arcs_22_2[1] = {
-	{0, 2},
+	{0, 1},
 };
-static state states_22[3] = {
+static state states_22[2] = {
 	{1, arcs_22_0},
 	{1, arcs_22_1},
-	{1, arcs_22_2},
 };
 static arc arcs_23_0[1] = {
 	{69, 1},
@@ -779,7 +777,7 @@ static arc arcs_38_0[1] = {
 	{93, 1},
 };
 static arc arcs_38_1[1] = {
-	{58, 2},
+	{59, 2},
 };
 static arc arcs_38_2[1] = {
 	{82, 3},
@@ -1034,7 +1032,7 @@ static arc arcs_50_0[1] = {
 };
 static arc arcs_50_1[3] = {
 	{123, 0},
-	{56, 0},
+	{57, 0},
 	{0, 1},
 };
 static state states_50[2] = {
@@ -1113,7 +1111,8 @@ static arc arcs_55_0[7] = {
 	{144, 5},
 	{145, 6},
 };
-static arc arcs_55_1[2] = {
+static arc arcs_55_1[3] = {
+	{43, 7},
 	{135, 7},
 	{15, 5},
 };
@@ -1149,7 +1148,7 @@ static arc arcs_55_10[1] = {
 };
 static state states_55[11] = {
 	{7, arcs_55_0},
-	{2, arcs_55_1},
+	{3, arcs_55_1},
 	{2, arcs_55_2},
 	{2, arcs_55_3},
 	{1, arcs_55_4},
@@ -1533,7 +1532,7 @@ static arc arcs_71_0[1] = {
 	{93, 1},
 };
 static arc arcs_71_1[1] = {
-	{58, 2},
+	{59, 2},
 };
 static arc arcs_71_2[1] = {
 	{82, 3},
@@ -1590,7 +1589,7 @@ static arc arcs_74_0[1] = {
 	{93, 1},
 };
 static arc arcs_74_1[1] = {
-	{58, 2},
+	{59, 2},
 };
 static arc arcs_74_2[1] = {
 	{82, 3},
@@ -1653,165 +1652,182 @@ static state states_77[2] = {
 	{1, arcs_77_0},
 	{1, arcs_77_1},
 };
-static dfa dfas[78] = {
+static arc arcs_78_0[1] = {
+	{160, 1},
+};
+static arc arcs_78_1[2] = {
+	{9, 2},
+	{0, 1},
+};
+static arc arcs_78_2[1] = {
+	{0, 2},
+};
+static state states_78[3] = {
+	{1, arcs_78_0},
+	{2, arcs_78_1},
+	{1, arcs_78_2},
+};
+static dfa dfas[79] = {
 	{256, "single_input", 0, 3, states_0,
-	 "\004\050\014\000\000\000\200\012\076\205\011\162\000\002\000\140\010\111\023\002"},
+	 "\004\050\014\000\000\000\000\025\074\205\011\162\000\002\000\140\010\111\023\002\001"},
 	{257, "file_input", 0, 2, states_1,
-	 "\204\050\014\000\000\000\200\012\076\205\011\162\000\002\000\140\010\111\023\002"},
+	 "\204\050\014\000\000\000\000\025\074\205\011\162\000\002\000\140\010\111\023\002\001"},
 	{258, "eval_input", 0, 3, states_2,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000\000"},
 	{259, "decorator", 0, 7, states_3,
-	 "\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{260, "decorators", 0, 2, states_4,
-	 "\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{261, "funcdef", 0, 7, states_5,
-	 "\000\010\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\010\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{262, "parameters", 0, 4, states_6,
-	 "\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{263, "varargslist", 0, 10, states_7,
-	 "\000\040\010\060\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\040\010\060\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{264, "fpdef", 0, 4, states_8,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{265, "fplist", 0, 3, states_9,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{266, "stmt", 0, 2, states_10,
-	 "\000\050\014\000\000\000\200\012\076\205\011\162\000\002\000\140\010\111\023\002"},
+	 "\000\050\014\000\000\000\000\025\074\205\011\162\000\002\000\140\010\111\023\002\001"},
 	{267, "simple_stmt", 0, 4, states_11,
-	 "\000\040\010\000\000\000\200\012\076\205\011\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\025\074\205\011\000\000\002\000\140\010\111\023\000\001"},
 	{268, "small_stmt", 0, 2, states_12,
-	 "\000\040\010\000\000\000\200\012\076\205\011\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\025\074\205\011\000\000\002\000\140\010\111\023\000\001"},
 	{269, "expr_stmt", 0, 6, states_13,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000\000"},
 	{270, "augassign", 0, 2, states_14,
-	 "\000\000\000\000\000\370\177\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\360\377\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{271, "print_stmt", 0, 9, states_15,
-	 "\000\000\000\000\000\000\200\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{272, "del_stmt", 0, 3, states_16,
-	 "\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{273, "pass_stmt", 0, 2, states_17,
-	 "\000\000\000\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\020\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{274, "flow_stmt", 0, 2, states_18,
-	 "\000\000\000\000\000\000\000\000\076\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\074\000\000\000\000\000\000\000\000\000\000\000\001"},
 	{275, "break_stmt", 0, 2, states_19,
-	 "\000\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{276, "continue_stmt", 0, 2, states_20,
-	 "\000\000\000\000\000\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{277, "return_stmt", 0, 3, states_21,
-	 "\000\000\000\000\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000"},
-	{278, "yield_stmt", 0, 3, states_22,
-	 "\000\000\000\000\000\000\000\000\020\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\020\000\000\000\000\000\000\000\000\000\000\000\000"},
+	{278, "yield_stmt", 0, 2, states_22,
+	 "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\001"},
 	{279, "raise_stmt", 0, 7, states_23,
-	 "\000\000\000\000\000\000\000\000\040\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{280, "import_stmt", 0, 2, states_24,
-	 "\000\000\000\000\000\000\000\000\000\005\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\005\000\000\000\000\000\000\000\000\000\000\000"},
 	{281, "import_name", 0, 3, states_25,
-	 "\000\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000"},
 	{282, "import_from", 0, 7, states_26,
-	 "\000\000\000\000\000\000\000\000\000\004\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000"},
 	{283, "import_as_name", 0, 4, states_27,
-	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{284, "dotted_as_name", 0, 4, states_28,
-	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{285, "import_as_names", 0, 3, states_29,
-	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{286, "dotted_as_names", 0, 2, states_30,
-	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{287, "dotted_name", 0, 2, states_31,
-	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{288, "global_stmt", 0, 3, states_32,
-	 "\000\000\000\000\000\000\000\000\000\200\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\200\000\000\000\000\000\000\000\000\000\000\000"},
 	{289, "exec_stmt", 0, 7, states_33,
-	 "\000\000\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000"},
 	{290, "assert_stmt", 0, 5, states_34,
-	 "\000\000\000\000\000\000\000\000\000\000\010\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000"},
 	{291, "compound_stmt", 0, 2, states_35,
-	 "\000\010\004\000\000\000\000\000\000\000\000\162\000\000\000\000\000\000\000\002"},
+	 "\000\010\004\000\000\000\000\000\000\000\000\162\000\000\000\000\000\000\000\002\000"},
 	{292, "if_stmt", 0, 8, states_36,
-	 "\000\000\000\000\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000\000\000"},
 	{293, "while_stmt", 0, 8, states_37,
-	 "\000\000\000\000\000\000\000\000\000\000\000\020\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\020\000\000\000\000\000\000\000\000\000"},
 	{294, "for_stmt", 0, 10, states_38,
-	 "\000\000\000\000\000\000\000\000\000\000\000\040\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\040\000\000\000\000\000\000\000\000\000"},
 	{295, "try_stmt", 0, 10, states_39,
-	 "\000\000\000\000\000\000\000\000\000\000\000\100\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\100\000\000\000\000\000\000\000\000\000"},
 	{296, "except_clause", 0, 5, states_40,
-	 "\000\000\000\000\000\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000\000"},
 	{297, "suite", 0, 5, states_41,
-	 "\004\040\010\000\000\000\200\012\076\205\011\000\000\002\000\140\010\111\023\000"},
+	 "\004\040\010\000\000\000\000\025\074\205\011\000\000\002\000\140\010\111\023\000\001"},
 	{298, "test", 0, 4, states_42,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000\000"},
 	{299, "and_test", 0, 2, states_43,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\003\000\000"},
 	{300, "not_test", 0, 3, states_44,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\003\000\000"},
 	{301, "comparison", 0, 2, states_45,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000\000"},
 	{302, "comp_op", 0, 4, states_46,
-	 "\000\000\000\000\000\000\000\000\000\000\004\000\000\362\017\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\004\000\000\362\017\000\000\000\000\000\000"},
 	{303, "expr", 0, 2, states_47,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000\000"},
 	{304, "xor_expr", 0, 2, states_48,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000\000"},
 	{305, "and_expr", 0, 2, states_49,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000\000"},
 	{306, "shift_expr", 0, 2, states_50,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000\000"},
 	{307, "arith_expr", 0, 2, states_51,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000\000"},
 	{308, "term", 0, 2, states_52,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000\000"},
 	{309, "factor", 0, 3, states_53,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000\000"},
 	{310, "power", 0, 4, states_54,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\111\003\000\000"},
 	{311, "atom", 0, 11, states_55,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\111\003\000\000"},
 	{312, "listmaker", 0, 5, states_56,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000\000"},
 	{313, "testlist_gexp", 0, 5, states_57,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000\000"},
 	{314, "lambdef", 0, 5, states_58,
-	 "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\020\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\020\000\000"},
 	{315, "trailer", 0, 7, states_59,
-	 "\000\040\000\000\000\000\000\000\000\100\000\000\000\000\000\000\000\001\000\000"},
+	 "\000\040\000\000\000\000\000\000\000\100\000\000\000\000\000\000\000\001\000\000\000"},
 	{316, "subscriptlist", 0, 3, states_60,
-	 "\000\040\050\000\000\000\000\000\000\100\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\050\000\000\000\000\000\000\100\000\000\000\002\000\140\010\111\023\000\000"},
 	{317, "subscript", 0, 7, states_61,
-	 "\000\040\050\000\000\000\000\000\000\100\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\050\000\000\000\000\000\000\100\000\000\000\002\000\140\010\111\023\000\000"},
 	{318, "sliceop", 0, 3, states_62,
-	 "\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
 	{319, "exprlist", 0, 3, states_63,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\000\000\140\010\111\003\000\000"},
 	{320, "testlist", 0, 3, states_64,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000\000"},
 	{321, "testlist_safe", 0, 5, states_65,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000\000"},
 	{322, "dictmaker", 0, 5, states_66,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000\000"},
 	{323, "classdef", 0, 8, states_67,
-	 "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\002"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\002\000"},
 	{324, "arglist", 0, 8, states_68,
-	 "\000\040\010\060\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\060\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000\000"},
 	{325, "argument", 0, 5, states_69,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000\000"},
 	{326, "list_iter", 0, 2, states_70,
-	 "\000\000\000\000\000\000\000\000\000\000\000\042\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\042\000\000\000\000\000\000\000\000\000"},
 	{327, "list_for", 0, 6, states_71,
-	 "\000\000\000\000\000\000\000\000\000\000\000\040\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\040\000\000\000\000\000\000\000\000\000"},
 	{328, "list_if", 0, 4, states_72,
-	 "\000\000\000\000\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000\000\000"},
 	{329, "gen_iter", 0, 2, states_73,
-	 "\000\000\000\000\000\000\000\000\000\000\000\042\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\042\000\000\000\000\000\000\000\000\000"},
 	{330, "gen_for", 0, 6, states_74,
-	 "\000\000\000\000\000\000\000\000\000\000\000\040\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\040\000\000\000\000\000\000\000\000\000"},
 	{331, "gen_if", 0, 4, states_75,
-	 "\000\000\000\000\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000\000"},
+	 "\000\000\000\000\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000\000\000"},
 	{332, "testlist1", 0, 2, states_76,
-	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000"},
+	 "\000\040\010\000\000\000\000\000\000\000\000\000\000\002\000\140\010\111\023\000\000"},
 	{333, "encoding_decl", 0, 2, states_77,
-	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	 "\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
+	{334, "yield_expr", 0, 3, states_78,
+	 "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\001"},
 };
-static label labels[160] = {
+static label labels[161] = {
 	{0, "EMPTY"},
 	{256, 0},
 	{4, 0},
@@ -1855,6 +1871,7 @@ static label labels[160] = {
 	{289, 0},
 	{290, 0},
 	{270, 0},
+	{334, 0},
 	{37, 0},
 	{38, 0},
 	{39, 0},
@@ -1880,7 +1897,6 @@ static label labels[160] = {
 	{1, "break"},
 	{1, "continue"},
 	{1, "return"},
-	{1, "yield"},
 	{1, "raise"},
 	{281, 0},
 	{282, 0},
@@ -1972,10 +1988,11 @@ static label labels[160] = {
 	{329, 0},
 	{331, 0},
 	{333, 0},
+	{1, "yield"},
 };
 grammar _PyParser_Grammar = {
-	78,
+	79,
 	dfas,
-	{160, labels},
+	{161, labels},
 	256
 };