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qapi: Drop string input visitor method optional()

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visit_optional() is to be called only between visit_start_struct() and
visit_end_struct().  Visitors that don't support struct visits,
i.e. don't implement start_struct(), end_struct(), have no use for it.
Clarify documentation.

The string input visitor doesn't support struct visits.  Its
parse_optional() is therefore useless.  Drop it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1488544368-30622-16-git-send-email-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2017-03-03 13:32:35 +01:00
parent a9fc37f6bc
commit a8aec6de2a
2 changed files with 2 additions and 15 deletions
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4
include/qapi/visitor-impl.h
View File

@ -102,8 +102,8 @@ struct Visitor
/* Must be set to visit explicit null values. */
void (*type_null)(Visitor *v, const char *name, Error **errp);
/* Must be set for input visitors, optional otherwise. The core
* takes care of the return type in the public interface. */
/* Must be set for input visitors to visit structs, optional otherwise.
The core takes care of the return type in the public interface. */
void (*optional)(Visitor *v, const char *name, bool *present);
/* Must be set */

13
qapi/string-input-visitor.c
View File

@ -314,18 +314,6 @@ static void parse_type_number(Visitor *v, const char *name, double *obj,
*obj = val;
}
static void parse_optional(Visitor *v, const char *name, bool *present)
{
StringInputVisitor *siv = to_siv(v);
if (!siv->string) {
*present = false;
return;
}
*present = true;
}
static void string_input_free(Visitor *v)
{
StringInputVisitor *siv = to_siv(v);
@ -351,7 +339,6 @@ Visitor *string_input_visitor_new(const char *str)
v->visitor.start_list = start_list;
v->visitor.next_list = next_list;
v->visitor.end_list = end_list;
v->visitor.optional = parse_optional;
v->visitor.free = string_input_free;
v->string = str;