qemu/tests/qapi-schema/union-bad-discriminator.json

# we require the discriminator to be a string naming a base-type member
# this tests the old syntax for anonymous unions before we added alternates
{ 'enum': 'TestEnum',
  'data': [ 'value1', 'value2' ] }
{ 'struct': 'TestBase',
  'data': { 'enum1': 'TestEnum', 'kind': 'str' } }
{ 'struct': 'TestTypeA',
  'data': { 'string': 'str' } }
{ 'struct': 'TestTypeB',
  'data': { 'integer': 'int' } }
{ 'union': 'TestUnion',
  'base': 'TestBase',
  'discriminator': {},
  'data': { 'kind1': 'TestTypeA',
            'kind2': 'TestTypeB' } }
qapi: Tighten checking of unions Previous commits demonstrated that the generator had several flaws with less-than-perfect unions: - a simple union that listed the same branch twice (or two variant names that map to the same C enumerator, including the implicit MAX sentinel) ended up generating invalid C code - an anonymous union that listed two branches with the same qtype ended up generating invalid C code - the generator crashed on anonymous union attempts to use an array type - the generator was silently ignoring a base type for anonymous unions - the generator allowed unknown types or nested anonymous unions as a branch in an anonymous union Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> 2015-05-04 18:05:08 +03:00			`# we require the discriminator to be a string naming a base-type member`
qapi: Use 'alternate' to replace anonymous union Previous patches have led up to the point where I create the new meta-type "'alternate':'Foo'". See the previous patches for documentation; I intentionally split as much work into earlier patches to minimize the size of this patch, but a lot of it is churn due to testsuite fallout after updating to the new type. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> 2015-05-04 18:05:13 +03:00			`# this tests the old syntax for anonymous unions before we added alternates`
qapi: Add some union tests Demonstrate that the qapi generator doesn't deal well with unions that aren't up to par. Later patches will update the expected reseults as the generator is made stricter. A few tests work as planned, but most show poor or missing error messages. Of particular note, qapi-code-gen.txt documents 'base' only for flat unions, but the tests here demonstrate that we currently allow a 'base' to a simple union, although it is exercised only in the testsuite. Later patches will remove this undocumented feature, to give us more flexibility in adding other future extensions to union types. For example, one possible extension is the idea of a type-safe simple enum, where added fields tie the discriminator to a user-defined enum type rather than creating an implicit enum from the names in 'data'. But adding such safety on top of a simple enum with a base type could look ambiguous with a flat enum; besides, the documentation also mentions how any simple union can be represented by an equivalent flat union. So it will be simpler to just outlaw support for something we aren't using. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> 2015-05-04 18:05:05 +03:00			`{ 'enum': 'TestEnum',`
			`'data': [ 'value1', 'value2' ] }`
qapi: Use 'struct' instead of 'type' in schema Referring to "type" as both a meta-type (built-in, enum, union, alternate, or struct) and a specific type (the name that the schema uses for declaring structs) is confusing. Do the bulk of the conversion to "struct" in qapi schema, with a fairly mechanical: for f in `find -name '*.json'; do sed -i "s/'type'/'struct'/"; done followed by manually filtering out the places where we have a 'type' embedded in 'data'. Then tweak a couple of tests whose output changes slightly due to longer lines. I also verified that the generated files for QMP and QGA (such as qmp-commands.h) are the same before and after, as assurance that I didn't leave in any accidental member name changes. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> 2015-05-04 18:05:27 +03:00			`{ 'struct': 'TestBase',`
qapi: Add some union tests Demonstrate that the qapi generator doesn't deal well with unions that aren't up to par. Later patches will update the expected reseults as the generator is made stricter. A few tests work as planned, but most show poor or missing error messages. Of particular note, qapi-code-gen.txt documents 'base' only for flat unions, but the tests here demonstrate that we currently allow a 'base' to a simple union, although it is exercised only in the testsuite. Later patches will remove this undocumented feature, to give us more flexibility in adding other future extensions to union types. For example, one possible extension is the idea of a type-safe simple enum, where added fields tie the discriminator to a user-defined enum type rather than creating an implicit enum from the names in 'data'. But adding such safety on top of a simple enum with a base type could look ambiguous with a flat enum; besides, the documentation also mentions how any simple union can be represented by an equivalent flat union. So it will be simpler to just outlaw support for something we aren't using. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> 2015-05-04 18:05:05 +03:00			`'data': { 'enum1': 'TestEnum', 'kind': 'str' } }`
qapi: Use 'struct' instead of 'type' in schema Referring to "type" as both a meta-type (built-in, enum, union, alternate, or struct) and a specific type (the name that the schema uses for declaring structs) is confusing. Do the bulk of the conversion to "struct" in qapi schema, with a fairly mechanical: for f in `find -name '*.json'; do sed -i "s/'type'/'struct'/"; done followed by manually filtering out the places where we have a 'type' embedded in 'data'. Then tweak a couple of tests whose output changes slightly due to longer lines. I also verified that the generated files for QMP and QGA (such as qmp-commands.h) are the same before and after, as assurance that I didn't leave in any accidental member name changes. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> 2015-05-04 18:05:27 +03:00			`{ 'struct': 'TestTypeA',`
qapi: Add some union tests Demonstrate that the qapi generator doesn't deal well with unions that aren't up to par. Later patches will update the expected reseults as the generator is made stricter. A few tests work as planned, but most show poor or missing error messages. Of particular note, qapi-code-gen.txt documents 'base' only for flat unions, but the tests here demonstrate that we currently allow a 'base' to a simple union, although it is exercised only in the testsuite. Later patches will remove this undocumented feature, to give us more flexibility in adding other future extensions to union types. For example, one possible extension is the idea of a type-safe simple enum, where added fields tie the discriminator to a user-defined enum type rather than creating an implicit enum from the names in 'data'. But adding such safety on top of a simple enum with a base type could look ambiguous with a flat enum; besides, the documentation also mentions how any simple union can be represented by an equivalent flat union. So it will be simpler to just outlaw support for something we aren't using. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> 2015-05-04 18:05:05 +03:00			`'data': { 'string': 'str' } }`
qapi: Use 'struct' instead of 'type' in schema Referring to "type" as both a meta-type (built-in, enum, union, alternate, or struct) and a specific type (the name that the schema uses for declaring structs) is confusing. Do the bulk of the conversion to "struct" in qapi schema, with a fairly mechanical: for f in `find -name '*.json'; do sed -i "s/'type'/'struct'/"; done followed by manually filtering out the places where we have a 'type' embedded in 'data'. Then tweak a couple of tests whose output changes slightly due to longer lines. I also verified that the generated files for QMP and QGA (such as qmp-commands.h) are the same before and after, as assurance that I didn't leave in any accidental member name changes. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> 2015-05-04 18:05:27 +03:00			`{ 'struct': 'TestTypeB',`
qapi: Add some union tests Demonstrate that the qapi generator doesn't deal well with unions that aren't up to par. Later patches will update the expected reseults as the generator is made stricter. A few tests work as planned, but most show poor or missing error messages. Of particular note, qapi-code-gen.txt documents 'base' only for flat unions, but the tests here demonstrate that we currently allow a 'base' to a simple union, although it is exercised only in the testsuite. Later patches will remove this undocumented feature, to give us more flexibility in adding other future extensions to union types. For example, one possible extension is the idea of a type-safe simple enum, where added fields tie the discriminator to a user-defined enum type rather than creating an implicit enum from the names in 'data'. But adding such safety on top of a simple enum with a base type could look ambiguous with a flat enum; besides, the documentation also mentions how any simple union can be represented by an equivalent flat union. So it will be simpler to just outlaw support for something we aren't using. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> 2015-05-04 18:05:05 +03:00			`'data': { 'integer': 'int' } }`
			`{ 'union': 'TestUnion',`
			`'base': 'TestBase',`
qapi: Use 'alternate' to replace anonymous union Previous patches have led up to the point where I create the new meta-type "'alternate':'Foo'". See the previous patches for documentation; I intentionally split as much work into earlier patches to minimize the size of this patch, but a lot of it is churn due to testsuite fallout after updating to the new type. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> 2015-05-04 18:05:13 +03:00			`'discriminator': {},`
qapi: Add some union tests Demonstrate that the qapi generator doesn't deal well with unions that aren't up to par. Later patches will update the expected reseults as the generator is made stricter. A few tests work as planned, but most show poor or missing error messages. Of particular note, qapi-code-gen.txt documents 'base' only for flat unions, but the tests here demonstrate that we currently allow a 'base' to a simple union, although it is exercised only in the testsuite. Later patches will remove this undocumented feature, to give us more flexibility in adding other future extensions to union types. For example, one possible extension is the idea of a type-safe simple enum, where added fields tie the discriminator to a user-defined enum type rather than creating an implicit enum from the names in 'data'. But adding such safety on top of a simple enum with a base type could look ambiguous with a flat enum; besides, the documentation also mentions how any simple union can be represented by an equivalent flat union. So it will be simpler to just outlaw support for something we aren't using. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> 2015-05-04 18:05:05 +03:00			`'data': { 'kind1': 'TestTypeA',`
			`'kind2': 'TestTypeB' } }`