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compile: Give a proper error on 'async with'/'async for' outside 'async def' 

A simple reproducer is:
   async for x in():x
This commit is contained in:
Jeff Epler 2020-03-01 09:40:43 -06:00
parent 511c180869
commit 862830da32
1 changed files with 17 additions and 0 deletions
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17
py/compile.c
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@ -1711,6 +1711,16 @@ STATIC void compile_yield_from(compiler_t *comp) {
}
#if MICROPY_PY_ASYNC_AWAIT
STATIC bool compile_require_async_context(compiler_t *comp, mp_parse_node_struct_t *pns) {
int scope_flags = comp->scope_cur->scope_flags;
if(scope_flags & MP_SCOPE_FLAG_GENERATOR) {
return true;
}
compile_syntax_error(comp, (mp_parse_node_t)pns,
translate("'async for' or 'async with' outside async function"));
return false;
}
STATIC void compile_await_object_method(compiler_t *comp, qstr method) {
EMIT_ARG(load_method, method, false);
EMIT_ARG(call_method, 0, 0, 0);
@ -1720,6 +1730,10 @@ STATIC void compile_await_object_method(compiler_t *comp, qstr method) {
STATIC void compile_async_for_stmt(compiler_t *comp, mp_parse_node_struct_t *pns) {
// comp->break_label |= MP_EMIT_BREAK_FROM_FOR;
if(!compile_require_async_context(comp, pns)) {
return;
}
qstr context = MP_PARSE_NODE_LEAF_ARG(pns->nodes[1]);
uint while_else_label = comp_next_label(comp);
uint try_exception_label = comp_next_label(comp);
@ -1857,6 +1871,9 @@ STATIC void compile_async_with_stmt_helper(compiler_t *comp, int n, mp_parse_nod
}
STATIC void compile_async_with_stmt(compiler_t *comp, mp_parse_node_struct_t *pns) {
if(!compile_require_async_context(comp, pns)) {
return;
}
// get the nodes for the pre-bit of the with (the a as b, c as d, ... bit)
mp_parse_node_t *nodes;
int n = mp_parse_node_extract_list(&pns->nodes[0], PN_with_stmt_list, &nodes);