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qapi: Fix generated code when flat union has member 'kind'

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A flat union's tag member gets renamed to 'kind' in the generated
code.  Breaks when another member named 'kind' exists.

Example, adapted from qapi-schema-test.json:

    { 'struct': 'UserDefUnionBase',
      'data': { 'kind': 'str', 'enum1': 'EnumOne' } }

We generate:

    struct UserDefFlatUnion
    {
        EnumOne kind;
        union {
            void *data;
            UserDefA *value1;
            UserDefB *value2;
            UserDefB *value3;
        };
        char *kind;
    };

Kill the silly rename.

Reported-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Markus Armbruster
2015-07-31 10:30:04 +02:00
parent 5aa05d3f72
commit 0f61af3eb3
4 changed files with 9 additions and 5 deletions
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7
scripts/qapi-visit.py
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@@ -288,20 +288,23 @@ void visit_type_%(name)s(Visitor *m, %(name)s **obj, const char *name, Error **e
name=c_name(name))
if not discriminator:
tag = 'kind'
disc_key = "type"
else:
tag = discriminator
disc_key = discriminator
ret += mcgen('''
visit_type_%(disc_type)s(m, &(*obj)->kind, "%(disc_key)s", &err);
visit_type_%(disc_type)s(m, &(*obj)->%(c_tag)s, "%(disc_key)s", &err);
if (err) {
goto out_obj;
}
if (!visit_start_union(m, !!(*obj)->data, &err) || err) {
goto out_obj;
}
switch ((*obj)->kind) {
switch ((*obj)->%(c_tag)s) {
''',
disc_type = disc_type,
c_tag=c_name(tag),
disc_key = disc_key)
for key in members: