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2024-05-06qapi: Simplify QAPISchemaVariants @tag_memberMarkus Armbruster
For union types, the tag member is known only after .check(). We used to code this in a simple way: QAPISchemaVariants attribute .tag_member was None for union types until .check(). Since this complicated typing, recent commit "qapi/schema: fix typing for QAPISchemaVariants.tag_member" hid it behind a property. The previous commit lets us treat .tag_member just like the other attributes that become known only in .check(): declare, but don't initialize it in .__init__(). Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-05-06qapi: Move conditional code from QAPISchemaVariants to its subtypesMarkus Armbruster
QAPISchemaVariants.check()'s code is almost entirely conditional on union vs. alternate type. Move the conditional code to QAPISchemaBranches.check() and QAPISchemaAlternatives.check(), where the conditions are always satisfied. Attribute QAPISchemaVariants.tag_name is now only used by QAPISchemaBranches. Move it there. Refactor the three types' .__init__() to make them a bit simpler. Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-05-06qapi: Rename QAPISchemaAlternateType.variants to .alternativesMarkus Armbruster
A previous commit narrowed the type of QAPISchemaAlternateType.variants from QAPISchemaVariants to QAPISchemaAlternatives. Rename it to .alternatives. Same for .__init__() parameter @variants. Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-05-06qapi: Rename QAPISchemaObjectType.variants to .branchesMarkus Armbruster
A previous commit narrowed the type of QAPISchemaObjectType.variants from QAPISchemaVariants to QAPISchemaBranches. Rename it to .branches. Same for .__init__() parameter @variants. Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-05-06qapi: Rename visitor parameter @variants to @alternativesMarkus Armbruster
A previous commit narrowed the type of .visit_alternate_type() parameter @variants from QAPISchemaVariants to QAPISchemaAlternatives. Rename it to @alternatives. One of them passes @alternatives to helper function gen_visit_alternate(). Rename its @variants parameter to @alternatives as well. Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-05-06qapi: Rename visitor parameter @variants to @branchesMarkus Armbruster
The previous commit narrowed the type of .visit_object_type() parameter @variants from QAPISchemaVariants to QAPISchemaBranches. Rename it to @branches. Same for .visit_object_type_flat(). A few of these pass @branches to helper functions: QAPISchemaGenRSTVisitor.visit_object_type() to ._nodes_for_members() and ._nodes_for_variant_when(), and QAPISchemaGenVisitVisitor.visit_object_type() to gen_visit_object_members(). Rename the helpers' @variants parameters to @branches as well. Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-05-06qapi: New QAPISchemaBranches, QAPISchemaAlternativesMarkus Armbruster
QAPISchemaVariants represents either a union type's branches, or an alternate type's alternatives. Much of its code is conditional on which one it actually is. Create QAPISchemaBranches for branches, and QAPISchemaAlternatives for alternatives, both subtypes of QAPISchemaVariants. Replace QAPISchemaVariants by one of them where possible. Keep it only where we actually deal with either of them. QAPISchemaVariants.__init__() takes @tag_name and @tag_member, where exactly one must be None: @tag_name for alternatives, @tag_member for branches. Let QAPISchemaBranches.__init__() take just @tag_name, and QAPISchemaAlternatives.__init__() take just @tag_member. A later patch will move the conditional code to the subtypes. Signed-off-by: Markus Armbruster <armbru@redhat.com>
2024-04-24Merge tag 'pull-qapi-2024-04-24' of https://repo.or.cz/qemu/armbru into stagingRichard Henderson
QAPI patches patches for 2024-04-24 # -----BEGIN PGP SIGNATURE----- # # iQJGBAABCAAwFiEENUvIs9frKmtoZ05fOHC0AOuRhlMFAmYovX4SHGFybWJydUBy # ZWRoYXQuY29tAAoJEDhwtADrkYZT0RQP/1R1oOSdfWmiSR5gdW+IDE88VrjNY+Md # lZJ7dTtbIDbwABP6s7/wGIxlc4bf6lwIwhWNnfOa+y71jJ/u9aX2Q6D8wHY5lQnu # b8jhzoP3UyB+LQV5TTX1nTqTaO72Bj0pxw/0/DeKCzg7kgjys06a1Ln9P0oyWs6x # li/Cs133wPtZ5rISqif5yOmssber0h2D584k5MN2VK7eaGidLioQQIRmSDikPE6Z # TpnOEqySInIFhPJmm77il19ZDpCrgdCoD7lXoqX1C6XScYz7dU+m/TaToFk1lECw # VstR2SJT39TzbOLdis1O5/vsLP0QfciMRQbUktSrf4jQHumrkSa/OE6xKwJC3x82 # axJWc+BygcosylKc5CYVzwSlHugHw6Lf39qui//yzi5CXakzO6owKX7Q8AcH3PPy # 6thncy0dvw1ggq/BZGYhjyG+6MXBCWipPGVXFp9Gf2cAayTALhwyNtPvDNX57fzT # UZA/fa+/Wc9xZv1YAnxLaKyo4o65YWXVnq1eHXV17ny08BzZNYOC2ZuXim+rMThM # lxzcrTkrMLgsGXetp59uhZw9JRnVvaxLqNXfC2bwpoRzXzuifvnPithl6nkSm1YB # TvHGZZdO3B498kOW6947KrMVFh3t4aNWkdbOyetAMECy71H3Q4CTHYGFa5TzXT9O # Rjz31NYdVNBE # =uyfg # -----END PGP SIGNATURE----- # gpg: Signature made Wed 24 Apr 2024 01:06:22 AM PDT # gpg: using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653 # gpg: issuer "armbru@redhat.com" # gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [undefined] # gpg: aka "Markus Armbruster <armbru@pond.sub.org>" [undefined] # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653 * tag 'pull-qapi-2024-04-24' of https://repo.or.cz/qemu/armbru: (25 commits) qapi: Dumb down QAPISchema.lookup_entity() qapi: Tighten check whether implicit object type already exists qapi/schema: remove unnecessary asserts qapi/schema: turn on mypy strictness qapi/schema: add type hints qapi/parser.py: assert member.info is present in connect_member qapi/parser: demote QAPIExpression to Dict[str, Any] qapi/schema: assert inner type of QAPISchemaVariants in check_clash() qapi/schema: fix typing for QAPISchemaVariants.tag_member qapi/schema: Don't initialize "members" with `None` qapi/schema: add _check_complete flag qapi/schema: assert info is present when necessary qapi/schema: fix QAPISchemaArrayType.check's call to resolve_type qapi: Assert built-in types exist qapi/schema: assert resolve_type has 'info' and 'what' args on error qapi/schema: add type narrowing to lookup_type() qapi/schema: adjust type narrowing for mypy's benefit qapi/schema: make c_type() and json_type() abstract methods qapi/schema: declare type for QAPISchemaArrayType.element_type qapi/schema: declare type for QAPISchemaObjectTypeMember.type ... Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-04-24qapi: Dumb down QAPISchema.lookup_entity()Markus Armbruster
QAPISchema.lookup_entity() takes an optional type argument, a subtype of QAPISchemaDefinition, and returns that type or None. Callers can use this to save themselves an isinstance() test. The only remaining user of this convenience feature is .lookup_type(). But we don't actually save anything anymore there: we still need the isinstance() to help mypy over the hump. Drop the .lookup_entity() argument, and adjust .lookup_type(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-26-armbru@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> [Commit message typo fixed]
2024-04-24qapi: Tighten check whether implicit object type already existsMarkus Armbruster
Entities with names starting with q_obj_ are implicit object types. Therefore, QAPISchema._make_implicit_object_type()'s .lookup_entity() can only return a QAPISchemaObjectType. Assert that. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-25-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: John Snow <jsnow@redhat.com>
2024-04-24qapi/schema: remove unnecessary assertsJohn Snow
With strict typing enabled, these runtime statements aren't necessary anymore; we can prove them statically. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-24-armbru@redhat.com>
2024-04-24qapi/schema: turn on mypy strictnessJohn Snow
This patch can be rolled in with the previous one once the series is ready for merge, but for work-in-progress' sake, it's separate here. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-23-armbru@redhat.com>
2024-04-24qapi/schema: add type hintsJohn Snow
This patch only adds type hints, which aren't utilized at runtime and don't change the behavior of this module in any way. In a scant few locations, type hints are removed where no longer necessary due to inference power from typing all of the rest of creation; and any type hints that no longer need string quotes are changed. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-22-armbru@redhat.com>
2024-04-24qapi/parser.py: assert member.info is present in connect_memberJohn Snow
Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-21-armbru@redhat.com>
2024-04-24qapi/parser: demote QAPIExpression to Dict[str, Any]John Snow
Dict[str, object] is a stricter type, but with the way that code is currently arranged, it is infeasible to enforce this strictness. In particular, although expr.py's entire raison d'être is normalization and type-checking of QAPI Expressions, that type information is not "remembered" in any meaningful way by mypy because each individual expression is not downcast to a specific expression type that holds all the details of each expression's unique form. As a result, all of the code in schema.py that deals with actually creating type-safe specialized structures has no guarantee (myopically) that the data it is being passed is correct. There are two ways to solve this: (1) Re-assert that the incoming data is in the shape we expect it to be, or (2) Disable type checking for this data. (1) is appealing to my sense of strictness, but I gotta concede that it is asinine to re-check the shape of a QAPIExpression in schema.py when expr.py has just completed that work at length. The duplication of code and the nightmare thought of needing to update both locations if and when we change the shape of these structures makes me extremely reluctant to go down this route. (2) allows us the chance to miss updating types in the case that types are updated in expr.py, but it *is* an awful lot simpler and, importantly, gets us closer to type checking schema.py *at all*. Something is better than nothing, I'd argue. So, do the simpler dumber thing and worry about future strictness improvements later. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-20-armbru@redhat.com>
2024-04-24qapi/schema: assert inner type of QAPISchemaVariants in check_clash()John Snow
QAPISchemaVariant's "variants" field is typed as List[QAPISchemaVariant], where the typing for QAPISchemaVariant allows its type field to be any QAPISchemaType. However, QAPISchemaVariant expects that all of its variants contain the narrower QAPISchemaObjectType. This relationship is enforced at runtime in QAPISchemaVariants.check(). This relationship is not embedded in the type system though, so QAPISchemaVariants.check_clash() needs to re-assert this property in order to call QAPISchemaVariant.type.check_clash(). Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-19-armbru@redhat.com>
2024-04-24qapi/schema: fix typing for QAPISchemaVariants.tag_memberJohn Snow
There are two related changes here: (1) We need to perform type narrowing for resolving the type of tag_member during check(), and (2) tag_member is a delayed initialization field, but we can hide it behind a property that raises an Exception if it's called too early. This simplifies the typing in quite a few places and avoids needing to assert that the "tag_member is not None" at a dozen callsites, which can be confusing and suggest the wrong thing to a drive-by contributor. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-18-armbru@redhat.com>
2024-04-24qapi/schema: Don't initialize "members" with `None`John Snow
Declare, but don't initialize the "members" field with type List[QAPISchemaObjectTypeMember]. This simplifies the typing from what would otherwise be Optional[List[T]] to merely List[T]. This removes the need to add assertions to several callsites that this value is not None - which it never will be after the delayed initialization in check() anyway. The type declaration without initialization trick will cause accidental uses of this field prior to full initialization to raise an AttributeError. (Note that it is valid to have an empty members list, see the internal q_empty object as an example. For this reason, we cannot use the empty list as a replacement test for full initialization and instead rely on the _checked/_check_complete fields.) Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-17-armbru@redhat.com>
2024-04-24qapi/schema: add _check_complete flagJohn Snow
Instead of using the None value for the members field, use a dedicated flag to detect recursive misconfigurations. This is intended to assist with subsequent patches that seek to remove the "None" value from the members field (which can never hold that value after the final call to check()) in order to simplify the static typing of that field; avoiding the need of assertions littered at many callsites to eliminate the possibility of the None value. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-16-armbru@redhat.com>
2024-04-24qapi/schema: assert info is present when necessaryJohn Snow
QAPISchemaInfo arguments can often be None because built-in definitions don't have such information. The type hint can only be Optional[QAPISchemaInfo] then. But, mypy gets upset about all the places where we exploit that it can't actually be None there. Add assertions that will help mypy over the hump, to enable adding type hints in a forthcoming commit. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-15-armbru@redhat.com>
2024-04-24qapi/schema: fix QAPISchemaArrayType.check's call to resolve_typeJohn Snow
Adjust the expression at the callsite to work around mypy's weak type introspection that believes this expression can resolve to QAPISourceInfo; it cannot. (Fundamentally: self.info only resolves to false in a boolean expression when it is None; therefore this expression may only ever produce Optional[str]. mypy does not know that 'info', when it is a QAPISourceInfo object, cannot ever be false.) Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-14-armbru@redhat.com>
2024-04-24qapi: Assert built-in types existMarkus Armbruster
QAPISchema.lookup_type('FOO') returns a QAPISchemaType when type 'FOO' exists, else None. It won't return None for built-in types like 'int'. Since mypy can't see that, it'll complain that we assign the Optional[QAPISchemaType] returned by .lookup_type() to QAPISchemaType variables. Add assertions to help it over the hump. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-13-armbru@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com>
2024-04-24qapi/schema: assert resolve_type has 'info' and 'what' args on errorJohn Snow
resolve_type() is generally used to resolve configuration-provided type names into type objects, and generally requires valid 'info' and 'what' parameters. In some cases, such as with QAPISchemaArrayType.check(), resolve_type may be used to resolve built-in types and as such will not have an 'info' argument, but also must not fail in this scenario. Use an assertion to sate mypy that we will indeed have 'info' and 'what' parameters for the error pathway in resolve_type. Note: there are only three callsites to resolve_type at present where "info" is perceived by mypy to be possibly None: 1) QAPISchemaArrayType.check() 2) QAPISchemaObjectTypeMember.check() 3) QAPISchemaEvent.check() Of those three, only the first actually ever passes None; the other two are limited by their base class initializers which accept info=None, but neither subclass actually use a None value in practice, currently. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-12-armbru@redhat.com>
2024-04-24qapi/schema: add type narrowing to lookup_type()John Snow
This function is a bit hard to type as-is; mypy needs some assertions to assist with the type narrowing. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-11-armbru@redhat.com>
2024-04-24qapi/schema: adjust type narrowing for mypy's benefitJohn Snow
We already take care to perform some type narrowing for arg_type and ret_type, but not in a way where mypy can utilize the result once we add type hints, e.g.: qapi/schema.py:833: error: Incompatible types in assignment (expression has type "QAPISchemaType", variable has type "Optional[QAPISchemaObjectType]") [assignment] qapi/schema.py:893: error: Incompatible types in assignment (expression has type "QAPISchemaType", variable has type "Optional[QAPISchemaObjectType]") [assignment] A simple change to use a temporary variable helps the medicine go down. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-10-armbru@redhat.com>
2024-04-24qapi/schema: make c_type() and json_type() abstract methodsJohn Snow
These methods should always return a str, it's only the default abstract implementation that doesn't. They can be marked "abstract", which requires subclasses to override the method with the proper return type. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-9-armbru@redhat.com>
2024-04-24qapi/schema: declare type for QAPISchemaArrayType.element_typeJohn Snow
A QAPISchemaArrayType's element type gets resolved only during .check(). We have QAPISchemaArrayType.__init__() initialize self.element_type = None, and .check() assign the actual type. Using .element_type before .check() is wrong, and hopefully crashes due to the value being None. Works. However, it makes for awkward typing. With .element_type: Optional[QAPISchemaType], mypy is of course unable to see that it's None before .check(), and a QAPISchemaType after. To help it over the hump, we'd have to assert self.element_type is not None before all the (valid) uses. The assertion catches invalid uses, but only at run time; mypy can't flag them. Instead, declare .element_type in .__init__() as QAPISchemaType *without* initializing it. Using .element_type before .check() now certainly crashes, which is an improvement. Mypy still can't flag invalid uses, but that's okay. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-8-armbru@redhat.com>
2024-04-24qapi/schema: declare type for QAPISchemaObjectTypeMember.typeJohn Snow
A QAPISchemaObjectTypeMember's type gets resolved only during .check(). We have QAPISchemaObjectTypeMember.__init__() initialize self.type = None, and .check() assign the actual type. Using .type before .check() is wrong, and hopefully crashes due to the value being None. Works. However, it makes for awkward typing. With .type: Optional[QAPISchemaType], mypy is of course unable to see that it's None before .check(), and a QAPISchemaType after. To help it over the hump, we'd have to assert self.type is not None before all the (valid) uses. The assertion catches invalid uses, but only at run time; mypy can't flag them. Instead, declare .type in .__init__() as QAPISchemaType *without* initializing it. Using .type before .check() now certainly crashes, which is an improvement. Mypy still can't flag invalid uses, but that's okay. Addresses typing errors such as these: qapi/schema.py:657: error: "None" has no attribute "alternate_qtype" [attr-defined] qapi/schema.py:662: error: "None" has no attribute "describe" [attr-defined] Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-7-armbru@redhat.com>
2024-04-24qapi: create QAPISchemaDefinitionJohn Snow
Include entities don't have names, but we generally expect "entities" to have names. Reclassify all entities with names as *definitions*, leaving the nameless include entities as QAPISchemaEntity instances. This is primarily to help simplify typing around expectations of what callers expect for properties of an "entity". Suggested-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-6-armbru@redhat.com>
2024-04-24qapi/schema: add pylint suppressionsJohn Snow
With this patch, pylint is happy with the file, so enable it in the configuration. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-5-armbru@redhat.com>
2024-04-24qapi: sort pylint suppressionsJohn Snow
Suggested-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-4-armbru@redhat.com>
2024-04-24qapi/parser: shush up pylintJohn Snow
Shhh! Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-3-armbru@redhat.com>
2024-04-24qapi/parser: fix typo - self.returns.info => self.errors.infoJohn Snow
Small copy-pasto. The correct info field to use in this conditional block is self.errors.info. Fixes: 3a025d3d1ffa Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240315152301.3621858-2-armbru@redhat.com>
2024-04-24qapi: Inline and remove QERR_INVALID_PARAMETER_TYPE definitionPhilippe Mathieu-Daudé
Address the comment added in commit 4629ed1e98 ("qerror: Finally unused, clean up"), from 2015: /* * These macros will go away, please don't use * in new code, and do not add new ones! */ Manual changes (escaping the format in qapi/visit.py). Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240312141343.3168265-8-armbru@redhat.com> Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
2024-03-04qapi: Reject "Returns" section when command doesn't return anythingMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240227113921.236097-14-armbru@redhat.com>
2024-03-04qapi: New documentation section tag "Errors"Markus Armbruster
We use section "Returns" for documenting both success and error response of commands. I intend to generate better command success response documentation. Easier when "Returns" documents just he success response. Create new section tag "Errors". The next two commits will move error response documentation from "Returns" sections to "Errors" sections. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240227113921.236097-4-armbru@redhat.com>
2024-03-04qapi: Slightly clearer error message for invalid "Returns" sectionMarkus Armbruster
Change "'Returns:' is only valid for commands" to "'Returns' section is only valid for commands". Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240227113921.236097-3-armbru@redhat.com>
2024-03-04qapi: Memorize since & returns sectionsMarkus Armbruster
This is chiefly to make code that looks up these sections easier to read. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240227113921.236097-2-armbru@redhat.com>
2024-02-26qapi: Divorce QAPIDoc from QAPIParseErrorMarkus Armbruster
QAPIDoc stores a reference to QAPIParser just to pass it to QAPIParseError. The resulting error position depends on the state of the parser. It happens to be the current comment line. Servicable, but action at a distance. The commit before previous moved most uses of QAPIParseError from QAPIDoc to QAPIParser. There are just three left. Convert them to QAPISemError. This involves passing info to a few methods. Then drop the reference to QAPIParser. The three errors lose the column number. Not really interesting here: it's the comment line's indentation. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-17-armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26qapi: Reject multiple and empty feature descriptionsMarkus Armbruster
The parser recognizes only the first "Features:" line. Any subsequent ones are treated as ordinary text, as visible in test case doc-duplicate-features. Recognize "Features:" lines anywhere. A second one is an error. A 'Features:' line without any features is useless, but not an error. Make it an error. This makes detecting a second "Features:" line easier. qapi/run-state.json actually has an instance of this since commit fe17522d854 (qapi: Remove deprecated 'singlestep' member of StatusInfo). Clean it up. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-16-armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26qapi: Rewrite doc comment parserMarkus Armbruster
QAPISchemaParser is a conventional recursive descent parser. Except QAPISchemaParser.get_doc() delegates most of the doc comment parsing work to a state machine in QAPIDoc. The state machine doesn't get tokens like a recursive descent parser, it is fed tokens. I find this state machine rather opaque and hard to maintain. Replace it by a conventional parser, all in QAPISchemaParser. Less code, and (at least in my opinion) easier to understand. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-15-armbru@redhat.com> Tested-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26qapi: Merge adjacent untagged sectionsMarkus Armbruster
The parser mostly doesn't create adjacent untagged sections, and merging the ones it does create is hardly worth the bother. I'm doing it to avoid behavioral change in the next commit. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-14-armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26qapi: Call QAPIDoc.check() alwaysMarkus Armbruster
We currently call QAPIDoc.check() only for definition documentation. Calling it for free-form documentation as well is simpler. No change, because it doesn't actually do anything there. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-13-armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26qapi: Recognize section tags and 'Features:' only after blank lineMarkus Armbruster
Putting a blank line before section tags and 'Features:' is good, existing practice. Enforce it. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-12-armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26qapi: Require descriptions and tagged sections to be indentedMarkus Armbruster
By convention, we indent the second and subsequent lines of descriptions and tagged sections, except for examples. Turn this into a hard rule, and apply it to examples, too. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-11-armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> [Straightforward conflicts in qapi/migration.json resolved]
2024-02-26qapi: Reject section heading in the middle of a doc commentMarkus Armbruster
docs/devel/qapi-code-gen.txt claims "A heading line must be the first line of the documentation comment block" since commit 55ec69f8b16 (docs/devel/qapi-code-gen.txt: Update to new rST backend conventions). Not true, we have code to make it work anywhere in a free-form doc comment: commit dcdc07a97cb (qapi: Make section headings start a new doc comment block). Make it true, for simplicity's sake. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-10-armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26qapi: Rename QAPIDoc.Section.name to .tagMarkus Armbruster
Since the previous commit, QAPIDoc.Section.name is either None (untagged section) or the section's tag string ('Returns', '@name', ...). Rename it to .tag. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-9-armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26qapi: Improve error message for empty doc sectionsMarkus Armbruster
Improve the message for an empty tagged section from empty doc section 'Note' to text required after 'Note:' and the message for an empty argument or feature description from empty doc section 'foo' to text required after '@foo:' Improve the error position to refer to the beginning of the empty section instead of its end. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-8-armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26qapi: Improve error position for bogus invalid "Returns" sectionMarkus Armbruster
When something other than a command has a "Returns" section, the error message points to the beginning of the definition comment. Point to the "Returns" section instead. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-7-armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2024-02-26qapi: Improve error position for bogus argument descriptionsMarkus Armbruster
When documented arguments don't exist, the error message points to the beginning of the definition comment. Point to the first bogus argument description instead. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240216145841.2099240-6-armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>