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| author | Markus Armbruster <armbru@redhat.com> | 2015-06-26 10:19:11 +0200 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2015-09-04 15:47:13 +0200 |
| commit | 8c3f8e77215bfedb7854221868f655e148506936 (patch) | |
| tree | c49d6c7672d25980dec64b31e2aebe9aa8d8f154 /scripts | |
| parent | 1e6c1616a91cdcbe9a8387541f7689b8c11632aa (diff) | |
| download | qemu-8c3f8e77215bfedb7854221868f655e148506936.zip | |
qapi-visit: Fix generated code when schema has forward refs
The visit_type_implicit_FOO() are generated on demand, right before
their first use. Used by visit_type_STRUCT_fields() when STRUCT has
base FOO, and by visit_type_UNION() when flat UNION has member a FOO.
If the schema defines FOO after its first use as struct base or flat
union member, visit_type_implicit_FOO() calls
visit_type_implicit_FOO() before its definition, which doesn't
compile.
Rearrange qapi-schema-test.json to demonstrate the bug.
Fix by generating the necessary forward declaration.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/qapi-visit.py | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py index 4ec79a6db8..b3a308fb51 100644 --- a/scripts/qapi-visit.py +++ b/scripts/qapi-visit.py @@ -17,13 +17,23 @@ from qapi import * import re implicit_structs = [] +struct_fields_seen = set() def generate_visit_implicit_struct(type): global implicit_structs if type in implicit_structs: return '' implicit_structs.append(type) - return mcgen(''' + ret = '' + if type not in struct_fields_seen: + # Need a forward declaration + ret += mcgen(''' + +static void visit_type_%(c_type)s_fields(Visitor *m, %(c_type)s **obj, Error **errp); +''', + c_type=type_name(type)) + + ret += mcgen(''' static void visit_type_implicit_%(c_type)s(Visitor *m, %(c_type)s **obj, Error **errp) { @@ -38,8 +48,11 @@ static void visit_type_implicit_%(c_type)s(Visitor *m, %(c_type)s **obj, Error * } ''', c_type=type_name(type)) + return ret def generate_visit_struct_fields(name, members, base = None): + struct_fields_seen.add(name) + ret = '' if base: |