qapi: Remove outdated tests related to QMP/branch collisions

Now that branches are in a separate C namespace, we can remove
the restrictions in the parser that claim a branch name would
collide with QMP, and delete the negative tests that are no
longer problematic.  A separate patch can then add positive
tests to qapi-schema-test to test that any corner cases will
compile correctly.

This reverts the scripts/qapi.py portion of commit 7b2a5c2f,
now that the assertions that it plugged are no longer possible.
Signed-off-by: NEric Blake <eblake@redhat.com>
Message-Id: <1447836791-369-15-git-send-email-eblake@redhat.com>
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>

scripts/qapi.py

@@ -548,8 +548,7 @@ def check_union(expr, expr_info):
     base = expr.get('base')
     discriminator = expr.get('discriminator')
     members = expr['data']
-    values = {'MAX': '(automatic)', 'KIND': '(automatic)',
-              'TYPE': '(automatic)'}
+    values = {'MAX': '(automatic)'}
 
     # Two types of unions, determined by discriminator.
 
@@ -607,19 +606,13 @@ def check_union(expr, expr_info):
                                " of branch '%s'" % key)
 
         # If the discriminator names an enum type, then all members
-        # of 'data' must also be members of the enum type, which in turn
-        # must not collide with the discriminator name.
+        # of 'data' must also be members of the enum type.
         if enum_define:
             if key not in enum_define['enum_values']:
                 raise QAPIExprError(expr_info,
                                     "Discriminator value '%s' is not found in "
                                     "enum '%s'" %
                                     (key, enum_define["enum_name"]))
-            if discriminator in enum_define['enum_values']:
-                raise QAPIExprError(expr_info,
-                                    "Discriminator name '%s' collides with "
-                                    "enum value in '%s'" %
-                                    (discriminator, enum_define["enum_name"]))
 
         # Otherwise, check for conflicts in the generated enum
         else:

tests/Makefile

@@ -281,9 +281,7 @@ qapi-schema += flat-union-bad-base.json
 qapi-schema += flat-union-bad-discriminator.json
 qapi-schema += flat-union-base-any.json
 qapi-schema += flat-union-base-union.json
-qapi-schema += flat-union-clash-branch.json
 qapi-schema += flat-union-clash-member.json
-qapi-schema += flat-union-clash-type.json
 qapi-schema += flat-union-empty.json
 qapi-schema += flat-union-inline.json
 qapi-schema += flat-union-int-branch.json
@@ -345,7 +343,6 @@ qapi-schema += union-bad-branch.json
 qapi-schema += union-base-no-discriminator.json
 qapi-schema += union-clash-branches.json
 qapi-schema += union-clash-data.json
-qapi-schema += union-clash-type.json
 qapi-schema += union-empty.json
 qapi-schema += union-invalid-base.json
 qapi-schema += union-max.json

tests/qapi-schema/flat-union-clash-branch.exit

-0

tests/qapi-schema/flat-union-clash-branch.json

-# Flat union branch name collision
-# FIXME: this parses, but then fails to compile due to a duplicate 'c_d'
-# (one from the base member, the other from the branch name).  We should
-# either reject the collision at parse time, or munge the generated branch
-# name to allow this to compile.
-{ 'enum': 'TestEnum',
-  'data': [ 'base', 'c-d' ] }
-{ 'struct': 'Base',
-  'data': { 'enum1': 'TestEnum', '*c_d': 'str' } }
-{ 'struct': 'Branch1',
-  'data': { 'string': 'str' } }
-{ 'struct': 'Branch2',
-  'data': { 'value': 'int' } }
-{ 'union': 'TestUnion',
-  'base': 'Base',
-  'discriminator': 'enum1',
-  'data': { 'base': 'Branch1',
-            'c-d': 'Branch2' } }

tests/qapi-schema/flat-union-clash-branch.out

-object :empty
-object Base
-    member enum1: TestEnum optional=False
-    member c_d: str optional=True
-object Branch1
-    member string: str optional=False
-object Branch2
-    member value: int optional=False
-enum TestEnum ['base', 'c-d']
-object TestUnion
-    base Base
-    tag enum1
-    case base: Branch1
-    case c-d: Branch2

tests/qapi-schema/flat-union-clash-type.err

-tests/qapi-schema/flat-union-clash-type.json:11: Discriminator name 'type' collides with enum value in 'TestEnum'

tests/qapi-schema/flat-union-clash-type.exit

-1

tests/qapi-schema/flat-union-clash-type.json

-# Flat union branch 'type'
-# Reject this, because we would have a clash in generated C, between the
-# outer tag 'type' and the branch name 'type' within the union.
-# TODO: We could munge the generated C branch name to let it compile.
-{ 'enum': 'TestEnum',
-  'data': [ 'type' ] }
-{ 'struct': 'Base',
-  'data': { 'type': 'TestEnum' } }
-{ 'struct': 'Branch1',
-  'data': { 'string': 'str' } }
-{ 'union': 'TestUnion',
-  'base': 'Base',
-  'discriminator': 'type',
-  'data': { 'type': 'Branch1' } }

tests/qapi-schema/union-clash-type.err

-tests/qapi-schema/union-clash-type.json:8: Union 'TestUnion' member 'kind' clashes with '(automatic)'

tests/qapi-schema/union-clash-type.exit

-1

tests/qapi-schema/union-clash-type.json

-# Union branch 'type'
-# Reject this, because we would have a clash in generated C, between the
-# simple union's implicit tag member 'kind' and the branch name 'kind'
-# within the union.
-# TODO: Even when the generated C is switched to use 'type' rather than
-# 'kind', to match the QMP spelling, the collision should still be detected.
-# Or, we could munge the branch name to allow compilation.
-{ 'union': 'TestUnion',
-  'data': { 'kind': 'int', 'type': 'str' } }