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Re: [PATCH v3 3/7] qapi/expr: Split check_expr out from check_exprs
From: |
Markus Armbruster |
Subject: |
Re: [PATCH v3 3/7] qapi/expr: Split check_expr out from check_exprs |
Date: |
Fri, 10 Feb 2023 13:33:16 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) |
Another observation...
John Snow <jsnow@redhat.com> writes:
> Primarily, this reduces a nesting level of a particularly long
> block. It's mostly code movement, but a new docstring is created.
>
> It also has the effect of creating a fairly convenient "catch point" in
> check_exprs for exception handling without making the nesting level even
> worse.
>
> Signed-off-by: John Snow <jsnow@redhat.com>
>
> ---
>
> This patch was originally written as part of my effort to factor out
> QAPISourceInfo from this file by having expr.py raise a simple
> exception, then catch and wrap it at the higher level.
>
> This series doesn't do that anymore, but reducing the nesting level
> still seemed subjectively nice. It's not crucial.
>
> Signed-off-by: John Snow <jsnow@redhat.com>
> ---
> scripts/qapi/expr.py | 179 +++++++++++++++++++++++--------------------
> 1 file changed, 95 insertions(+), 84 deletions(-)
>
> diff --git a/scripts/qapi/expr.py b/scripts/qapi/expr.py
> index 5a1782b57ea..b56353bdf84 100644
> --- a/scripts/qapi/expr.py
> +++ b/scripts/qapi/expr.py
> @@ -595,6 +595,99 @@ def check_event(expr: _JSONObject, info: QAPISourceInfo)
> -> None:
> check_type(args, info, "'data'", allow_dict=not boxed)
>
>
> +def check_expr(expr_elem: _JSONObject) -> None:
[...]
> def check_exprs(exprs: List[_JSONObject]) -> List[_JSONObject]:
> """
> Validate and normalize a list of parsed QAPI schema expressions.
The typing is kind of wrong.
The list is the value of QAPISchemaParser.exprs, which is (losely) typed
as List[Dict[str, object]]. It is actually a dict mapping
'expr' -> _ExprValue
'info' -> QAPISourceInfo
'doc' -> Optional[QAPIDoc]
Thet's not what _JSONObject is! Its doc string describes it as
"Deserialized JSON objects as returned by the parser", i.e. the same as
_ExprValue.
Works only because _JSONObject is a dict mapping arbitrary keys to
_JSONObject, str or bool.
This patch spreads the flawed typing to the new function.
Gets healed later in the series.
[...]