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teach 2to3 about 'yield from'

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Benjamin Peterson 2014-04-10 00:23:18 -04:00
parent 4ab92c800a
commit 0654be18b3
3 changed files with 11 additions and 1 deletions
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3
Lib/lib2to3/Grammar.txt
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@ -155,4 +155,5 @@ testlist1: test (',' test)*
# not used in grammar, but may appear in "node" passed from Parser to Compiler # not used in grammar, but may appear in "node" passed from Parser to Compiler
encoding_decl: NAME encoding_decl: NAME
yield_expr: 'yield' [testlist] yield_expr: 'yield' [yield_arg]
yield_arg: 'from' test | testlist

7
Lib/lib2to3/tests/test_parser.py
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@ -54,6 +54,13 @@ class TestMatrixMultiplication(GrammarTest):
self.validate("a @= b") self.validate("a @= b")
class TestYieldFrom(GrammarTest):
def test_matrix_multiplication_operator(self):
self.validate("yield from x")
self.validate("(yield from x) + y")
self.invalid_syntax("yield from")
class TestRaiseChanges(GrammarTest): class TestRaiseChanges(GrammarTest):
def test_2x_style_1(self): def test_2x_style_1(self):
self.validate("raise") self.validate("raise")

2
Misc/NEWS
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@ -168,6 +168,8 @@ Tests
Tools/Demos Tools/Demos
----------- -----------
- Add support for ``yield from`` to 2to3.
- Add support for the PEP 465 matrix multiplication operator to 2to3. - Add support for the PEP 465 matrix multiplication operator to 2to3.
- Issue #16047: Fix module exception list and __file__ handling in freeze. - Issue #16047: Fix module exception list and __file__ handling in freeze.