8000 bpo-42282: Fold constants inside named expressions by ncoghlan · Pull Request #23190 · python/cpython · GitHub
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bpo-42282: Fold constants inside named expressions #23190

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Merged
merged 5 commits into from
Nov 7, 2020
Merged

bpo-42282: Fold constants inside named expressions #23190

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6ca7c28
bpo-42282: Fold constants inside named expressions
ncoghlan Nov 7, 2020
45e3d50
Fix inverted comparison op folding
ncoghlan Nov 7, 2020
3addcc9
Fix comment
ncoghlan Nov 7, 2020
f8e52c0
Still clear errors that occur in constant folding
ncoghlan Nov 7, 2020
a4741aa
Minor code tweak (need to trigger new CI run anyway)
ncoghlan Nov 7, 2020
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Minor code tweak (need to trigger new CI run anyway)
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@ncoghlan
ncoghlan committed Nov 7, 2020
commit a4741aa27eb7f81016553d2be12630ee92db5ace
7 changes: 3 additions & 4 deletions Python/ast_opt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,8 @@
static int
make_const(expr_ty node, PyObject *val, PyArena *arena)
{
// Even if no new value was calculated, make_const may still
// need to clear an error (e.g. for division by zero)
if (val == NULL) {
if (PyErr_ExceptionMatches(PyExc_KeyboardInterrupt)) {
return 0;
Expand Down Expand Up @@ -274,14 +276,11 @@ fold_binop(expr_ty node, PyArena *arena, _PyASTOptimizeState *state)
break;
// No builtin constants implement the following operators
case MatMult:
break;
return 1;
// No default case, so the compiler will emit a warning if new binary
// operators are added without being handled here
}

// Even if no new value was calculated, make_const may still
// need to clear an error (e.g. for division by zero)

return make_const(node, newval, arena);
}

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