Re: [PATCH v2 07/22] qapi: Inline QERR_INVALID_PARAMETER_TYPE definition (constant param)

[Markus Armbruster <armbru@redhat.com>]

Philippe Mathieu-Daudé <philmd@linaro.org> writes:

> Address the comment added in commit 4629ed1e98
> ("qerror: Finally unused, clean up"), from 2015:
>
>   /*
>    * These macros will go away, please don't use
>    * in new code, and do not add new ones!
>    */
>
> Mechanical transformation using the following
> coccinelle semantic patch:
>
>     @match@
>     expression errp;
>     constant param;
>     constant value;
>     @@
>          error_setg(errp, QERR_INVALID_PARAMETER_TYPE, param, value);
>
>     @script:python strformat depends on match@
>     param << match.param;
>     value << match.value;
>     fixedfmt; // new var
>     @@
>     fixedfmt = f'"Invalid parameter type for \'{param[1:-1]}\', expected: {value[1:-1]}"'
>     coccinelle.fixedfmt = cocci.make_ident(fixedfmt)
>
>     @replace@
>     expression match.errp;
>     constant match.param;
>     constant match.value;
>     identifier strformat.fixedfmt;
>     @@
>     -    error_setg(errp, QERR_INVALID_PARAMETER_TYPE, param, value);
>     +    error_setg(errp, fixedfmt);
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> Acked-by: Thomas Huth <thuth@redhat.com>
> ---
>  target/arm/arm-qmp-cmds.c        | 3 ++-
>  target/s390x/cpu_models_sysemu.c | 3 ++-
>  2 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/target/arm/arm-qmp-cmds.c b/target/arm/arm-qmp-cmds.c
> index b53d5efe13..3c99fd8222 100644
> --- a/target/arm/arm-qmp-cmds.c
> +++ b/target/arm/arm-qmp-cmds.c
> @@ -154,7 +154,8 @@ CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
>      if (model->props) {
>          qdict_in = qobject_to(QDict, model->props);
>          if (!qdict_in) {
> -            error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
> +            error_setg(errp,
> +                       "Invalid parameter type for 'props', expected: dict");
>              return NULL;
>          }
>      }
> diff --git a/target/s390x/cpu_models_sysemu.c b/target/s390x/cpu_models_sysemu.c
> index 63981bf36b..4507714493 100644
> --- a/target/s390x/cpu_models_sysemu.c
> +++ b/target/s390x/cpu_models_sysemu.c
> @@ -111,7 +111,8 @@ static void cpu_model_from_info(S390CPUModel *model, const CpuModelInfo *info,
>      if (info->props) {
>          qdict = qobject_to(QDict, info->props);
>          if (!qdict) {
> -            error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
> +            error_setg(errp,
> +                       "Invalid parameter type for 'props', expected: dict");
>              return;
>          }
>      }

The error messages are awful.  Your patch makes their awfulness more
visible.  Improvement of sorts ;)