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qapi: Drop unused error argument for list and implicit struct

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No backend was setting an error when ending the visit of a list or
implicit struct, or when moving to the next list node.  Make the
callers a bit easier to follow by making this a part of the contract,
and removing the errp argument - callers can then unconditionally end
an object as part of cleanup without having to think about whether a
second error is dominated by a first, because there is no second
error.

A later patch will then tackle the larger task of splitting
visit_end_struct(), which can indeed set an error.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1454075341-13658-24-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Eric Blake 2016-01-29 06:48:59 -07:00 • committed by Markus Armbruster
parent bdd8e6b5d8
commit 08f9541dec
11 changed files with 41 additions and 53 deletions
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8
include/qapi/visitor.h
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@ -1,6 +1,7 @@
/*
* Core Definitions for QAPI Visitor Classes
*
* Copyright (C) 2012-2016 Red Hat, Inc.
* Copyright IBM, Corp. 2011
*
* Authors:
@ -32,10 +33,11 @@ void visit_start_struct(Visitor *v, const char *name, void **obj,
void visit_end_struct(Visitor *v, Error **errp);
void visit_start_implicit_struct(Visitor *v, void **obj, size_t size,
Error **errp);
void visit_end_implicit_struct(Visitor *v, Error **errp);
void visit_end_implicit_struct(Visitor *v);
void visit_start_list(Visitor *v, const char *name, Error **errp);
GenericList *visit_next_list(Visitor *v, GenericList **list, Error **errp);
void visit_end_list(Visitor *v, Error **errp);
GenericList *visit_next_list(Visitor *v, GenericList **list);
void visit_end_list(Visitor *v);
/**
* Check if an optional member @name of an object needs visiting.