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authorEric Blake <eblake@redhat.com>2015-12-01 22:20:47 -0700
committerMarkus Armbruster <armbru@redhat.com>2015-12-17 08:21:28 +0100
commit7264f5c50cc1be0f1406e3ebb45aedcca02f603a (patch)
tree2ef7be7a42b9213823acbd6826a1a1263dce3f17 /docs/qapi-code-gen.txt
parent1310a3d3bd9301ff5a825287638cfab24c2c6689 (diff)
qapi: Convert QType into QAPI built-in enum type
What's more meta than using qapi to define qapi? :) Convert QType into a full-fledged[*] builtin qapi enum type, so that a subsequent patch can then use it as the discriminator type of qapi alternate types. Fortunately, the judicious use of 'prefix' in the qapi definition avoids churn to the spelling of the enum constants. To avoid circular definitions, we have to flip the order of inclusion between "qobject.h" vs. "qapi-types.h". Back in commit 28770e0, we had the latter include the former, so that we could use 'QObject *' for our implementation of 'any'. But that usage also works with only a forward declaration, whereas the definition of QObject requires QType to be a complete type. [*] The type has to be builtin, rather than declared in qapi/common.json, because we want to use it for alternates even when common.json is not included. But since it is the first builtin enum type, we have to add special cases to qapi-types and qapi-visit to only emit definitions once, even when two qapi files are being compiled into the same binary (the way we already handled builtin list types like 'intList'). We may need to revisit how multiple qapi files share common types, but that's a project for another day. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1449033659-25497-4-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
Diffstat (limited to 'docs/qapi-code-gen.txt')
-rw-r--r--docs/qapi-code-gen.txt1
1 files changed, 1 insertions, 0 deletions
diff --git a/docs/qapi-code-gen.txt b/docs/qapi-code-gen.txt
index 2becba95b9..79bf072695 100644
--- a/docs/qapi-code-gen.txt
+++ b/docs/qapi-code-gen.txt
@@ -160,6 +160,7 @@ The following types are predefined, and map to C as follows:
accepts size suffixes
bool bool JSON true or false
any QObject * any JSON value
+ QType QType JSON string matching enum QType values
=== Includes ===