Merge remote-tracking branch 'remotes/armbru/tags/pull-qmp-2015-05-05' into staging

drop qapi nested structs

# gpg: Signature made Tue May 5 17:40:40 2015 BST using RSA key ID EB918653
# gpg: Good

Merge remote-tracking branch 'remotes/armbru/tags/pull-qmp-2015-05-05' into staging

drop qapi nested structs

# gpg: Signature made Tue May 5 17:40:40 2015 BST using RSA key ID EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>"

* remotes/armbru/tags/pull-qmp-2015-05-05: (40 commits)
qapi: Check for member name conflicts with a base class
qapi: Support (subset of) \u escapes in strings
qapi: Tweak doc references to QMP when QGA is also meant
qapi: Drop dead visitor code related to nested structs
qapi: Drop support for inline nested types
qapi: Drop inline nested structs in query-pci
qapi: Drop inline nested struct in query-version
qapi: Drop tests for inline nested structs
qapi: Merge UserDefTwo and UserDefNested in tests
qapi: Forbid 'type' in schema
qapi: Use 'struct' instead of 'type' in schema
qapi: Document 'struct' metatype
qapi: Prefer 'struct' over 'type' in generator
qapi: More rigorous checking for type safety bypass
qapi: Whitelist commands that don't return dictionary
qapi: Require valid names
qapi: More rigourous checking of types
qapi: Add some type check tests
qapi: Unify type bypass and add tests
qapi: Allow true, false and null in schema json
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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qapi: Better error messages for duplicated expressions

The previous commit demonstrated that the generator overlooked
duplicate expressions:
- a complex type or command reusing a built-in type name

qapi: Better error messages for duplicated expressions

The previous commit demonstrated that the generator overlooked
duplicate expressions:
- a complex type or command reusing a built-in type name
- redeclaration of a type name, whether by the same or different
metatype
- redeclaration of a command or event
- collision of a type with implicit 'Kind' enum for a union
- collision with an implicit MAX enum constant

Since the c_type() function in the generator treats all names
as being in the same namespace, this patch adds a global array
to track all known names and their source, to prevent collisions
before it can cause further problems. While valid .json files
won't trigger any of these cases, we might as well be nicer to
developers that make a typo while trying to add new QAPI code.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

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qapi: Add tests of redefined expressions

Demonstrate that the qapi generator doesn't deal very well with
redefined expressions. At the parse level, they are silently
accepted; and while the testsui

qapi: Add tests of redefined expressions

Demonstrate that the qapi generator doesn't deal very well with
redefined expressions. At the parse level, they are silently
accepted; and while the testsuite just stops at parsing, I've
further tested that many of them cause generator crashes or
invalid C code if they were appended to qapi-schema-test.json.
A later patch will tighten things up and adjust the testsuite
to match.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

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