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pjebypjeby
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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.
1 parent d794666 commit 0d6615f

16 files changed

Lines changed: 785 additions & 165 deletions

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‎Grammar/Grammar‎

Lines changed: 6 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -39,7 +39,7 @@ fplist: fpdef (',' fpdef)* [',']
3939
stmt: simple_stmt | compound_stmt
4040
simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE
4141
small_stmt: expr_stmt | print_stmt | del_stmt | pass_stmt | flow_stmt | import_stmt | global_stmt | exec_stmt | assert_stmt
42-
expr_stmt: testlist (augassign testlist | ('=' testlist)*)
42+
expr_stmt: testlist (augassign (yield_expr|testlist) | ('=' (yield_expr|testlist))*)
4343
augassign: '+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^=' | '<<=' | '>>=' | '**=' | '//='
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# For normal assignments, additional restrictions enforced by the interpreter
4545
print_stmt: 'print' ( [ test (',' test)* [','] ] | '>>' test [ (',' test)+ [','] ] )
@@ -49,7 +49,7 @@ flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt | yield_stmt
4949
break_stmt: 'break'
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continue_stmt: 'continue'
5151
return_stmt: 'return' [testlist]
52-
yield_stmt: 'yield' testlist
52+
yield_stmt: yield_expr
5353
raise_stmt: 'raise' [test [',' test [',' test]]]
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import_stmt: import_name | import_from
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import_name: 'import' dotted_as_names
@@ -86,7 +86,7 @@ arith_expr: term (('+'|'-') term)*
8686
term: factor (('*'|'/'|'%'|'//') factor)*
8787
factor: ('+'|'-'|'~') factor | power
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power: atom trailer* ['**' factor]
89-
atom: '(' [testlist_gexp] ')' | '[' [listmaker] ']' | '{' [dictmaker] '}' | '`' testlist1 '`' | NAME | NUMBER | STRING+
89+
atom: '(' [yield_expr|testlist_gexp] ')' | '[' [listmaker] ']' | '{' [dictmaker] '}' | '`' testlist1 '`' | NAME | NUMBER | STRING+
9090
listmaker: test ( list_for | (',' test)* [','] )
9191
testlist_gexp: test ( gen_for | (',' test)* [','] )
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lambdef: 'lambda' [varargslist] ':' test
@@ -116,3 +116,6 @@ testlist1: test (',' test)*
116116

117117
# not used in grammar, but may appear in "node" passed from Parser to Compiler
118118
encoding_decl: NAME
119+
120+
yield_expr: 'yield' [testlist]
121+

‎Include/ceval.h‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -65,6 +65,7 @@ PyAPI_FUNC(char *) PyEval_GetFuncDesc(PyObject *);
6565

6666
PyAPI_FUNC(PyObject *) PyEval_GetCallStats(PyObject *);
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PyAPI_FUNC(PyObject *) PyEval_EvalFrame(struct _frame *);
68+
PyAPI_FUNC(PyObject *) PyEval_EvalFrameEx(struct _frame *f, int exc);
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6970
/* this used to be handled on a per-thread basis - now just two globals */
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PyAPI_DATA(volatile int) _Py_Ticker;

‎Include/graminit.h‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -76,3 +76,4 @@
7676
#define gen_if 331
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#define testlist1 332
7878
#define encoding_decl 333
79+
#define yield_expr 334

‎Include/pyerrors.h‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -25,6 +25,7 @@ PyAPI_FUNC(void) PyErr_NormalizeException(PyObject**, PyObject**, PyObject**);
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PyAPI_DATA(PyObject *) PyExc_Exception;
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PyAPI_DATA(PyObject *) PyExc_StopIteration;
28+
PyAPI_DATA(PyObject *) PyExc_GeneratorExit;
2829
PyAPI_DATA(PyObject *) PyExc_StandardError;
2930
PyAPI_DATA(PyObject *) PyExc_ArithmeticError;
3031
PyAPI_DATA(PyObject *) PyExc_LookupError;

‎Lib/compiler/transformer.py‎

Lines changed: 11 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -403,7 +403,15 @@ def return_stmt(self, nodelist):
403403
return Return(self.com_node(nodelist[1]), lineno=nodelist[0][2])
404404

405405
def yield_stmt(self, nodelist):
406-
return Yield(self.com_node(nodelist[1]), lineno=nodelist[0][2])
406+
expr = self.com_node(nodelist[0])
407+
return Discard(expr, lineno=expr.lineno)
408+
409+
def yield_expr(self, nodelist):
410+
if len(nodelist)>1:
411+
value = nodelist[1]
412+
else:
413+
value = Const(None)
414+
return Yield(self.com_node(value), lineno=nodelist[0][2])
407415

408416
def raise_stmt(self, nodelist):
409417
# raise: [test [',' test [',' test]]]
@@ -1402,6 +1410,8 @@ def get_docstring(self, node, n=None):
14021410

14031411
if hasattr(symbol, 'yield_stmt'):
14041412
_legal_node_types.append(symbol.yield_stmt)
1413+
if hasattr(symbol, 'yield_expr'):
1414+
_legal_node_types.append(symbol.yield_expr)
14051415

14061416
_assign_types = [
14071417
symbol.test,

‎Lib/symbol.py‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -88,6 +88,7 @@
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gen_if = 331
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testlist1 = 332
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encoding_decl = 333
91+
yield_expr = 334
9192
#--end constants--
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9394
sym_name = {}

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