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perform yield from delegation by repeating YIELD_FROM opcode (closes #14230)

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This allows generators that are using yield from to be seen by debuggers. It
also kills the f_yieldfrom field on frame objects.

Patch mostly from Mark Shannon with a few tweaks by me.
This commit is contained in:
Benjamin Peterson 2012-03-15 15:37:39 -05:00
parent 3270d11d8a
commit 2afe6aeae8
9 changed files with 113 additions and 166 deletions
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6
Python/compile.c
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@ -840,9 +840,9 @@ opcode_stack_effect(int opcode, int oparg)
case IMPORT_STAR:
return -1;
case YIELD_VALUE:
case YIELD_FROM:
return 0;
case YIELD_FROM:
return -1;
case POP_BLOCK:
return 0;
case POP_EXCEPT:
@ -3323,6 +3323,8 @@ compiler_visit_expr(struct compiler *c, expr_ty e)
ADDOP_O(c, LOAD_CONST, Py_None, consts);
}
if (e->kind == YieldFrom_kind) {
ADDOP(c, GET_ITER);
ADDOP_O(c, LOAD_CONST, Py_None, consts);
ADDOP(c, YIELD_FROM);
}
else {