Issue #28008: Implement PEP 530 -- asynchronous comprehensions. · pythoncapi/cpython@52c4e7c · GitHub

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Commit 52c4e7c

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Yury Selivanov

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Issue python#28008: Implement PEP 530 -- asynchronous comprehensions.

1 parent 93b2dee commit 52c4e7c
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20 files changed

+613-114Lines changed: 613 additions & 114 deletions

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• Grammar
  • Grammar
• Include
  • Python-ast.h
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  • lib2to3
    • Grammar.txt
    • tests
      • test_parser.py
  • test
    • badsyntax_async1.py
    • badsyntax_async2.py
    • badsyntax_async3.py
    • badsyntax_async4.py
    • badsyntax_async5.py
    • badsyntax_async7.py
    • badsyntax_async8.py
    • test_ast.py
    • test_coroutines.py
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  • Python-ast.c
  • ast.c
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‎Grammar/Grammar‎

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+1-1Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
@@ -146,7 +146,7 @@ argument: ( test [comp_for] |
146	146	'*' test )
147	147
148	148	comp_iter: comp_for | comp_if
149		- comp_for: 'for' exprlist 'in' or_test [comp_iter]
	149	+ comp_for: [ASYNC] 'for' exprlist 'in' or_test [comp_iter]
150	150	comp_if: 'if' test_nocond [comp_iter]
151	151
152	152	# not used in grammar, but may appear in "node" passed from Parser to Compiler

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‎Include/Python-ast.h‎

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+3-2Lines changed: 3 additions & 2 deletions

Original file line number	Diff line number	Diff line change
@@ -389,6 +389,7 @@ struct _comprehension {
389	389	expr_ty target;
390	390	expr_ty iter;
391	391	asdl_seq *ifs;
	392	+ int is_async;
392	393	};
393	394
394	395	enum _excepthandler_kind {ExceptHandler_kind=1};
@@ -609,9 +610,9 @@ slice_ty _Py_Slice(expr_ty lower, expr_ty upper, expr_ty step, PyArena *arena);
609	610	slice_ty _Py_ExtSlice(asdl_seq * dims, PyArena *arena);
610	611	#define Index(a0, a1) _Py_Index(a0, a1)
611	612	slice_ty _Py_Index(expr_ty value, PyArena *arena);
612		- #define comprehension(a0, a1, a2, a3) _Py_comprehension(a0, a1, a2, a3)
	613	+ #define comprehension(a0, a1, a2, a3, a4) _Py_comprehension(a0, a1, a2, a3, a4)
613	614	comprehension_ty _Py_comprehension(expr_ty target, expr_ty iter, asdl_seq *
614		- ifs, PyArena *arena);
	615	+ ifs, int is_async, PyArena *arena);
615	616	#define ExceptHandler(a0, a1, a2, a3, a4, a5) _Py_ExceptHandler(a0, a1, a2, a3, a4, a5)
616	617	excepthandler_ty _Py_ExceptHandler(expr_ty type, identifier name, asdl_seq *
617	618	body, int lineno, int col_offset, PyArena

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‎Lib/lib2to3/Grammar.txt‎

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+1-1Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
@@ -150,7 +150,7 @@ arglist: (argument ',')* (argument [',']
150	150	argument: test [comp_for] | test '=' test # Really [keyword '='] test
151	151
152	152	comp_iter: comp_for | comp_if
153		- comp_for: 'for' exprlist 'in' testlist_safe [comp_iter]
	153	+ comp_for: [ASYNC] 'for' exprlist 'in' testlist_safe [comp_iter]
154	154	comp_if: 'if' old_test [comp_iter]
155	155
156	156	testlist1: test (',' test)*

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‎Lib/lib2to3/tests/test_parser.py‎

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+18Lines changed: 18 additions & 0 deletions

Original file line number	Diff line number	Diff line change
@@ -133,6 +133,24 @@ def test_await_expr(self):
133	133	await x
134	134	""")
135	135
	136	+ self.validate("""async def foo():
	137	+ [i async for i in b]
	138	+ """)
	139	+
	140	+ self.validate("""async def foo():
	141	+ {i for i in b
	142	+ async for i in a if await i
	143	+ for b in i}
	144	+ """)
	145	+
	146	+ self.validate("""async def foo():
	147	+ [await i for i in b if await c]
	148	+ """)
	149	+
	150	+ self.validate("""async def foo():
	151	+ [ i for i in b if c]
	152	+ """)
	153	+
136	154	self.validate("""async def foo():
137	155
138	156	def foo(): pass

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‎Lib/test/badsyntax_async1.py‎

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-2Lines changed: 0 additions & 2 deletions

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‎Lib/test/badsyntax_async2.py‎

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‎Lib/test/badsyntax_async3.py‎

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‎Lib/test/badsyntax_async4.py‎

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‎Lib/test/badsyntax_async5.py‎

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‎Lib/test/badsyntax_async7.py‎

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