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[3.7] bpo-33363: raise SyntaxError for async for/with outside async f… · python/cpython@a93a663

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3 files changed

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  • Misc/NEWS.d/next/Core and Builtins

3 files changed

lines changed

Original file line numberDiff line numberDiff line change

@@ -362,7 +362,22 @@ async def bar(): pass

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"""def foo():

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async def bar():

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pass\nawait a

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"""]

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""",

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"""def foo():

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async for i in arange(2):

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pass

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""",

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"""def foo():

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async with resource:

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pass

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""",

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"""async with resource:

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pass

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""",

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"""async for i in arange(2):

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pass

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""",

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]

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for code in samples:

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with self.subTest(code=code), self.assertRaises(SyntaxError):

Original file line numberDiff line numberDiff line change

@@ -0,0 +1,2 @@

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Raise a SyntaxError for ``async with`` and ``async for`` statements outside

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of async functions.

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@@ -2339,6 +2339,10 @@ compiler_async_for(struct compiler *c, stmt_ty s)

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basicblock *try, *except, *end, *after_try, *try_cleanup,

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*after_loop_else;

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if (c->u->u_scope_type != COMPILER_SCOPE_ASYNC_FUNCTION) {

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return compiler_error(c, "'async for' outside async function");

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}

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PyObject *stop_aiter_error = _PyUnicode_FromId(&PyId_StopAsyncIteration);

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if (stop_aiter_error == NULL) {

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return 0;

@@ -4204,6 +4208,9 @@ compiler_async_with(struct compiler *c, stmt_ty s, int pos)

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withitem_ty item = asdl_seq_GET(s->v.AsyncWith.items, pos);

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assert(s->kind == AsyncWith_kind);

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if (c->u->u_scope_type != COMPILER_SCOPE_ASYNC_FUNCTION) {

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return compiler_error(c, "'async with' outside async function");

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}

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block = compiler_new_block(c);

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finally = compiler_new_block(c);