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schema.py
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1487 lines (1152 loc) · 37.5 KB
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"""
Schema description
This file should be kept simple:
* no flow control
* no aliases
* only class definitions with annotations and `include` calls
For how documentation of generated QL code works, please read schema_documentation.md.
"""
from misc.codegen.lib.schemadefs import *
include("prefix.dbscheme")
@qltest.skip
class Element:
is_unknown: predicate | cpp.skip
@qltest.collapse_hierarchy
class File(Element):
name: string
is_successfully_extracted: predicate | cpp.skip
@qltest.skip
@qltest.collapse_hierarchy
class Location(Element):
file: File
start_line: int
start_column: int
end_line: int
end_column: int
@qltest.skip
class Locatable(Element):
location: optional[Location] | cpp.skip | doc("location associated with this element in the code")
@qltest.collapse_hierarchy
@qltest.skip
class ErrorElement(Locatable):
"""The superclass of all elements indicating some kind of error."""
pass
@use_for_null
class UnspecifiedElement(ErrorElement):
parent: optional[Element]
property: string
index: optional[int]
error: string
children: list["AstNode"] | child | desc("These will be present only in certain downgraded databases.")
class Comment(Locatable):
text: string
class Diagnostics(Locatable):
text: string
kind: int
class DbFile(File):
pass
class DbLocation(Location):
pass
@synth.on_arguments()
class UnknownFile(File):
pass
@synth.on_arguments()
class UnknownLocation(Location):
pass
class AstNode(Locatable):
pass
@group("type")
@ql.hideable
class Type(Element):
name: string
canonical_type: "Type" | desc("""
This is the unique type we get after resolving aliases and desugaring. For example, given
```
typealias MyInt = Int
```
then `[MyInt?]` has the canonical type `Array<Optional<Int>>`.
""")
@group("decl")
class Decl(AstNode):
module: "ModuleDecl"
members: list["Decl"] | child | desc("""
Prefer to use more specific methods (such as `EnumDecl.getEnumElement`) rather than relying
on the order of members given by `getMember`. In some cases the order of members may not
align with expectations, and could change in future releases.
""")
@group("expr")
@ql.hideable
class Expr(AstNode):
"""The base class for all expressions in Swift."""
type: optional[Type]
@group("pattern")
@ql.hideable
class Pattern(AstNode):
type: optional[Type]
@group("stmt")
class Stmt(AstNode):
pass
@group("decl")
class GenericContext(Element):
generic_type_params: list["GenericTypeParamDecl"] | child
@qltest.test_with("EnumDecl")
class EnumCaseDecl(Decl):
elements: list["EnumElementDecl"]
class UsingDecl(Decl):
is_main_actor: predicate
is_nonisolated: predicate
class ExtensionDecl(GenericContext, Decl):
extended_type_decl: "NominalTypeDecl"
protocols: list["ProtocolDecl"]
class IfConfigDecl(Decl):
active_elements: list[AstNode]
class ImportDecl(Decl):
is_exported: predicate
imported_module: optional["ModuleDecl"]
declarations: list["ValueDecl"]
@qltest.skip
class MissingMemberDecl(Decl):
"""A placeholder for missing declarations that can arise on object deserialization."""
name: string
class OperatorDecl(Decl):
name: string
class PatternBindingDecl(Decl):
inits: list[optional[Expr]] | child
patterns: list[Pattern] | child
class PoundDiagnosticDecl(Decl):
""" A diagnostic directive, which is either `#error` or `#warning`."""
kind: int | desc("""This is 1 for `#error` and 2 for `#warning`.""") | ql.internal
message: "StringLiteralExpr" | child
class PrecedenceGroupDecl(Decl):
pass
class TopLevelCodeDecl(Decl):
body: "BraceStmt" | child
class ValueDecl(Decl):
interface_type: Type
class AbstractStorageDecl(ValueDecl):
accessors: list["Accessor"] | child
class VarDecl(AbstractStorageDecl):
"""
A declaration of a variable such as
* a local variable in a function:
```
func foo() {
var x = 42 // <-
let y = "hello" // <-
...
}
```
* a member of a `struct` or `class`:
```
struct S {
var size : Int // <-
}
```
* ...
"""
name: string
type: Type
attached_property_wrapper_type: optional[Type]
parent_pattern: optional[Pattern]
parent_initializer: optional[Expr]
property_wrapper_backing_var_binding: optional[PatternBindingDecl] | child | desc("""
This is the synthesized binding introducing the property wrapper backing variable for this
variable, if any. See `getPropertyWrapperBackingVar`.
""")
property_wrapper_backing_var: optional["VarDecl"] | child | desc("""
This is the compiler synthesized variable holding the property wrapper for this variable, if any.
For a property wrapper like
```
@propertyWrapper struct MyWrapper { ... }
struct S {
@MyWrapper var x : Int = 42
}
```
the compiler synthesizes a variable in `S` along the lines of
```
var _x = MyWrapper(wrappedValue: 42)
```
This predicate returns such variable declaration.
""")
property_wrapper_projection_var_binding: optional[PatternBindingDecl] | child | desc("""
This is the synthesized binding introducing the property wrapper projection variable for this
variable, if any. See `getPropertyWrapperProjectionVar`.
""")
property_wrapper_projection_var: optional
4D2B
["VarDecl"] | child | desc("""
If this variable has a property wrapper with a projected value, this is the corresponding
synthesized variable holding that projected value, accessible with this variable's name
prefixed with `$`.
For a property wrapper like
```
@propertyWrapper struct MyWrapper {
var projectedValue : Bool
...
}
struct S {
@MyWrapper var x : Int = 42
}
```
```
the compiler synthesizes a variable in `S` along the lines of
```
var $x : Bool { ... }
```
This predicate returns such variable declaration.
""")
class ParamDecl(VarDecl):
is_inout: predicate | doc("this is an `inout` parameter")
property_wrapper_local_wrapped_var_binding: optional[PatternBindingDecl] | child | desc("""
This is the synthesized binding introducing the property wrapper local wrapped projection
variable for this variable, if any.
""")
property_wrapper_local_wrapped_var: optional["VarDecl"] | child | desc("""
This is the synthesized local wrapped value, shadowing this parameter declaration in case it
has a property wrapper.
""")
class Callable(AstNode):
name: optional[string] | doc("name of this callable") | desc("The name includes argument "
"labels of the callable, for example `myFunction(arg:)`.")
self_param: optional[ParamDecl] | child
params: list[ParamDecl] | child
body: optional["BraceStmt"] | child | desc("The body is absent within protocol declarations.")
captures: list["CapturedDecl"] | child
@group("decl")
class Function(GenericContext, ValueDecl, Callable):
pass
@qltest.test_with("EnumDecl")
class EnumElementDecl(ValueDecl):
name: string
params: list[ParamDecl] | child
class InfixOperatorDecl(OperatorDecl):
precedence_group: optional[PrecedenceGroupDecl]
class PostfixOperatorDecl(OperatorDecl):
pass
class PrefixOperatorDecl(OperatorDecl):
pass
class TypeDecl(ValueDecl):
name: string
inherited_types: list[Type] | desc("""
This only returns the types effectively appearing in the declaration. In particular it
will not resolve `TypeAliasDecl`s or consider base types added by extensions.
""")
class AbstractTypeParamDecl(TypeDecl):
pass
@group("decl")
class Initializer(Function):
pass
@group("decl")
class Deinitializer(Function):
pass
@ql.internal
@group("decl")
class AccessorOrNamedFunction(Function):
pass
class GenericTypeDecl(GenericContext, TypeDecl):
pass
class ModuleDecl(TypeDecl):
is_builtin_module: predicate | doc("this module is the built-in one")
is_system_module: predicate | doc("this module is a system one")
imported_modules: set["ModuleDecl"]
exported_modules: set["ModuleDecl"]
class SubscriptDecl(AbstractStorageDecl, GenericContext):
params: list[ParamDecl] | child
element_type: Type
element_type: Type
@group("decl")
class Accessor(AccessorOrNamedFunction):
is_getter: predicate | doc('this accessor is a getter')
is_setter: predicate | doc('this accessor is a setter')
is_will_set: predicate | doc('this accessor is a `willSet`, called before the property is set')
is_did_set: predicate | doc('this accessor is a `didSet`, called after the property is set')
is_read: predicate | doc('this accessor is a `_read` coroutine, yielding a borrowed value of the property')
is_modify: predicate | doc('this accessor is a `_modify` coroutine, yielding an inout value of the property')
is_unsafe_address: predicate | doc('this accessor is an `unsafeAddress` immutable addressor')
is_unsafe_mutable_address: predicate | doc('this accessor is an `unsafeMutableAddress` mutable addressor')
is_distributed_get: predicate | doc('this accessor is a distributed getter')
is_read2: predicate | doc('this accessor is a `read` coroutine, yielding a borrowed value of the property')
is_modify2: predicate | doc('this accessor is a `modify` coroutine, yielding an inout value of the property')
is_init: predicate | doc('this accessor is an `init` accessor')
class AssociatedTypeDecl(AbstractTypeParamDecl):
pass
@group("decl")
class NamedFunction(AccessorOrNamedFunction):
pass
class ConcreteVarDecl(VarDecl):
introducer_int: int | doc("introducer enumeration value") | desc("""
This is 0 if the variable was introduced with `let` and 1 if it was introduced with `var`.
""")
class GenericTypeParamDecl(AbstractTypeParamDecl):
pass
class NominalTypeDecl(GenericTypeDecl):
type: Type
class OpaqueTypeDecl(GenericTypeDecl):
"""
A declaration of an opaque type, that is formally equivalent to a given type but abstracts it
away.
Such a declaration is implicitly given when a declaration is written with an opaque result type,
for example
```
func opaque() -> some SignedInteger { return 1 }
```
See https://docs.swift.org/swift-book/LanguageGuide/OpaqueTypes.html.
"""
naming_declaration: ValueDecl
opaque_generic_params: list["GenericTypeParamType"]
opaque_generic_params: list["GenericTypeParamType"]
class TypeAliasDecl(GenericTypeDecl):
"""
A declaration of a type alias to another type. For example:
```
typealias MyInt = Int
```
"""
aliased_type: Type | doc("aliased type on the right-hand side of this type alias declaration") | desc("""
For example the aliased type of `MyInt` in the following code is `Int`:
```
typealias MyInt = Int
```
""")
class ClassDecl(NominalTypeDecl):
pass
class EnumDecl(NominalTypeDecl):
pass
class ProtocolDecl(NominalTypeDecl):
pass
class StructDecl(NominalTypeDecl):
pass
@group("expr")
class Argument(Locatable):
label: string
expr: Expr | child
class ClosureExpr(Expr, Callable):
pass
class AnyTryExpr(Expr):
sub_expr: Expr | child
class AppliedPropertyWrapperExpr(Expr):
"""An implicit application of a property wrapper on the argument of a call."""
kind: int | desc("This is 1 for a wrapped value and 2 for a projected one.")
value: Expr | child | desc("The value on which the wrapper is applied.")
param: ParamDecl | doc("parameter declaration owning this wrapper application")
class ApplyExpr(Expr):
function: Expr | child | doc("function being applied")
arguments: list[Argument] | child | doc("arguments passed to the applied function")
class AssignExpr(Expr):
dest: Expr | child
source: Expr | child
class BindOptionalExpr(Expr):
sub_expr: Expr | child
class CapturedDecl(Decl):
decl: ValueDecl | doc("the declaration captured by the parent closure")
is_direct: predicate
is_escaping: predicate
class CaptureListExpr(Expr):
binding_decls: list[PatternBindingDecl] | child
variables: list[VarDecl] | child | synth | desc("""
These are the variables introduced by this capture in the closure's scope, not the captured ones.
""")
closure_body: "ClosureExpr" | child
class CollectionExpr(Expr):
pass
class DeclRefExpr(Expr):
decl: Decl
replacement_types: list[Type]
has_direct_to_storage_semantics: predicate
has_direct_to_implementation_semantics: predicate
has_ordinary_semantics: predicate
has_distributed_thunk_semantics: predicate
class DefaultArgumentExpr(Expr):
param_decl: ParamDecl
param_index: int
caller_side_default: optional[Expr]
class DiscardAssignmentExpr(Expr):
pass
class DotSyntaxBaseIgnoredExpr(Expr):
qualifier: Expr | child
sub_expr: Expr | child
class DynamicTypeExpr(Expr):
base: Expr | child
class EnumIsCaseExpr(Expr):
sub_expr: Expr | child
element: EnumElementDecl
@qltest.skip
class ErrorExpr(Expr, ErrorElement):
pass
class ExplicitCastExpr(Expr):
sub_expr: Expr | child
class ForceValueExpr(Expr):
sub_expr: Expr | child
@qltest.collapse_hierarchy
class IdentityExpr(Expr):
sub_expr: Expr | child
class IfExpr(Expr):
condition: Expr | child
then_expr: Expr | child
else_expr: Expr | child
@qltest.collapse_hierarchy
class ImplicitConversionExpr(Expr):
sub_expr: Expr | child
class InOutExpr(Expr):
sub_expr: Expr | child
class KeyPathApplicationExpr(Expr):
base: Expr | child
key_path: Expr | child
class KeyPathDotExpr(Expr):
pass
class KeyPathComponent(AstNode):
"""
A component of a `KeyPathExpr`.
"""
kind: int | doc("kind of key path component") | desc("""
INTERNAL: Do not use.
This is 4 for method or initializer application, 5 for members, 6 for array and dictionary
subscripts, 7 for optional forcing (`!`), 8 for optional chaining (`?`), 9 for implicit
optional wrapping, 10 for `self`, and 11 for tuple element indexing.
The following values should not appear: 0 for invalid components, 1 for unresolved
method or initializer applications, 2 for unresolved members, 3 for unresolved subscripts,
12 for #keyPath dictionary keys, and 13 for implicit IDE code completion data.
""")
subscript_arguments : list[Argument] | child | doc(
"arguments to an array or dictionary subscript expression")
tuple_index : optional[int]
decl_ref : optional[ValueDecl] | doc("property or subscript operator")
component_type : Type | doc("return type of this component application") | desc("""
An optional-chaining component has a non-optional type to feed into the rest of the key
path; an optional-wrapping component is inserted if required to produce an optional type
as the final output.
""")
class KeyPathExpr(Expr):
"""
A key-path expression.
"""
root: optional["TypeRepr"] | child
components: list[KeyPathComponent] | child
class LazyInitializationExpr(Expr):
sub_expr: Expr | child
class LiteralExpr(Expr):
pass
class LookupExpr(Expr):
base: Expr | child
member: optional[Decl]
class MakeTemporarilyEscapableExpr(Expr):
escaping_closure: "OpaqueValueExpr" | child
nonescaping_closure: Expr | child
sub_expr: Expr | child
@qltest.skip
class ObjCSelectorExpr(Expr):
sub_expr: Expr | child
method: Function
class OneWayExpr(Expr):
sub_expr: Expr | child
class OpaqueValueExpr(Expr):
pass
class OpenExistentialExpr(Expr):
""" An implicit expression created by the compiler when a method is called on a protocol. For example in
```
protocol P {
func foo() -> Int
}
func bar(x: P) -> Int {
return x.foo()
}
`x.foo()` is actually wrapped in an `OpenExistentialExpr` that "opens" `x` replacing it in its subexpression with
an `OpaqueValueExpr`.
```
"""
sub_expr: Expr | child | desc("""
This wrapped subexpression is where the opaque value and the dynamic type under the protocol type may be used.""")
existential: Expr | child | doc("protocol-typed expression opened by this expression")
opaque_expr: OpaqueValueExpr | doc("opaque value expression embedded within `getSubExpr()`")
class OptionalEvaluationExpr(Expr):
sub_expr: Expr | child
class OtherInitializerRefExpr(Expr):
initializer: Initializer
class PropertyWrapperValuePlaceholderExpr(Expr):
"""
A placeholder substituting property initializations with `=` when the property has a property
wrapper with an initializer.
"""
wrapped_value: optional[Expr]
placeholder: OpaqueValueExpr
class RebindSelfInInitializerExpr(Expr):
sub_expr: Expr | child
self: VarDecl
@qltest.skip
class SequenceExpr(Expr):
elements: list[Expr] | child
class SuperRefExpr(Expr):
self: VarDecl
class TapExpr(Expr):
sub_expr: optional[Expr] | child
body: "BraceStmt" | child
var: VarDecl
class TupleElementExpr(Expr):
sub_expr: Expr | child
index: int
class TupleExpr(Expr):
elements: list[Expr] | child
class TypeExpr(Expr):
type_repr: optional["TypeRepr"] | child
class UnresolvedDeclRefExpr(Expr, ErrorElement):
name: optional[string]
class UnresolvedDotExpr(Expr, ErrorElement):
base: Expr | child
name: string
class UnresolvedMemberExpr(Expr, ErrorElement):
name: string
class UnresolvedPatternExpr(Expr, ErrorElement):
sub_pattern: Pattern | child
class UnresolvedSpecializeExpr(Expr, ErrorElement):
sub_expr: Expr | child
class VarargExpansionExpr(Expr):
sub_expr: Expr | child
class AnyHashableErasureExpr(ImplicitConversionExpr):
pass
class ArchetypeToSuperExpr(ImplicitConversionExpr):
pass
class ArrayExpr(CollectionExpr):
elements: list[Expr] | child
class ArrayToPointerExpr(ImplicitConversionExpr):
pass
class AutoClosureExpr(ClosureExpr):
pass
class AwaitExpr(IdentityExpr):
pass
class UnsafeExpr(IdentityExpr):
pass
class BinaryExpr(ApplyExpr):
pass
@qltest.skip
class BridgeFromObjCExpr(ImplicitConversionExpr):
pass
@qltest.skip
class BridgeToObjCExpr(ImplicitConversionExpr):
pass
class BuiltinLiteralExpr(LiteralExpr):
pass
class CallExpr(ApplyExpr):
pass
class CheckedCastExpr(ExplicitCastExpr):
pass
class ClassMetatypeToObjectExpr(ImplicitConversionExpr):
pass
class ExplicitClosureExpr(ClosureExpr):
pass
class CoerceExpr(ExplicitCastExpr):
pass
class CollectionUpcastConversionExpr(ImplicitConversionExpr):
pass
@qltest.skip
class ConditionalBridgeFromObjCExpr(ImplicitConversionExpr):
pass
class CovariantFunctionConversionExpr(ImplicitConversionExpr):
pass
class CovariantReturnConversionExpr(ImplicitConversionExpr):
pass
class DerivedToBaseExpr(ImplicitConversionExpr):
pass
class DestructureTupleExpr(ImplicitConversionExpr):
pass
class DictionaryExpr(CollectionExpr):
elements: list[Expr] | child
class DifferentiableFunctionExpr(ImplicitConversionExpr):
pass
class DifferentiableFunctionExtractOriginalExpr(ImplicitConversionExpr):
pass
class DotSelfExpr(IdentityExpr):
pass
@qltest.collapse_hierarchy
class DynamicLookupExpr(LookupExpr):
pass
class ErasureExpr(ImplicitConversionExpr):
pass
class ExistentialMetatypeToObjectExpr(ImplicitConversionExpr):
pass
class ForceTryExpr(AnyTryExpr):
pass
class ForeignObjectConversionExpr(ImplicitConversionExpr):
pass
class FunctionConversionExpr(ImplicitConversionExpr):
pass
class InOutToPointerExpr(ImplicitConversionExpr):
pass
class InjectIntoOptionalExpr(ImplicitConversionExpr):
pass
class InterpolatedStringLiteralExpr(LiteralExpr):
interpolation_expr: optional[OpaqueValueExpr]
appending_expr: optional[TapExpr] | child
class LinearFunctionExpr(ImplicitConversionExpr):
pass
class LinearFunctionExtractOriginalExpr(ImplicitConversionExpr):
pass
class LinearToDifferentiableFunctionExpr(ImplicitConversionExpr):
pass
class LoadExpr(ImplicitConversionExpr):
pass
class MemberRefExpr(LookupExpr):
has_direct_to_storage_semantics: predicate
has_direct_to_implementation_semantics: predicate
has_ordinary_semantics: predicate
has_distributed_thunk_semantics: predicate
class MetatypeConversionExpr(ImplicitConversionExpr):
pass
class NilLiteralExpr(LiteralExpr):
pass
class ObjectLiteralExpr(LiteralExpr):
"""
An instance of `#fileLiteral`, `#imageLiteral` or `#colorLiteral` expressions, which are used in playgrounds.
"""
kind: int | desc("""This is 0 for `#fileLiteral`, 1 for `#imageLiteral` and 2 for `#colorLiteral`.""")
arguments: list[Argument] | child
class OptionalTryExpr(AnyTryExpr):
pass
class OverloadedDeclRefExpr(Expr, ErrorElement):
"""
An ambiguous expression that might refer to multiple declarations. This will be present only
for failing compilations.
"""
possible_declarations: list[ValueDecl]
class ParenExpr(IdentityExpr):
pass
class PointerToPointerExpr(ImplicitConversionExpr):
pass
class PostfixUnaryExpr(ApplyExpr):
pass
class PrefixUnaryExpr(ApplyExpr):
pass
class ProtocolMetatypeToObjectExpr(ImplicitConversionExpr):
pass
@ql.default_doc_name("regular expression")
class RegexLiteralExpr(LiteralExpr):
"""A regular expression literal which is checked at compile time, for example `/a(a|b)*b/`."""
pattern: string
version: int | doc(
"version of the internal regular expression language being used by Swift")
@ql.internal
class SelfApplyExpr(ApplyExpr):
"""
An internal raw instance of method lookups like `x.foo` in `x.foo()`.
This is completely replaced by the synthesized type `MethodLookupExpr`.
"""
base: Expr
class StringToPointerExpr(ImplicitConversionExpr):
pass
class SubscriptExpr(LookupExpr):
arguments: list[Argument] | child
has_direct_to_storage_semantics: predicate
has_direct_to_implementation_semantics: predicate
has_ordinary_semantics: predicate
has_distributed_thunk_semantics: predicate
class TryExpr(AnyTryExpr):
pass
class UnderlyingToOpaqueExpr(ImplicitConversionExpr):
pass
class UnevaluatedInstanceExpr(ImplicitConversionExpr):
pass
class UnresolvedMemberChainResultExpr(IdentityExpr, ErrorElement):
pass
class UnresolvedTypeConversionExpr(ImplicitConversionExpr, ErrorElement):
pass
class BooleanLiteralExpr(BuiltinLiteralExpr):
value: boolean
class ConditionalCheckedCastExpr(CheckedCastExpr):
pass
@ql.internal
class InitializerRefCallExpr(SelfApplyExpr):
pass
@ql.internal
class DotSyntaxCallExpr(SelfApplyExpr):
pass
@synth.from_class(SelfApplyExpr)
class MethodLookupExpr(LookupExpr):
method_ref: Expr | child | doc("the underlying method declaration reference expression")
class DynamicMemberRefExpr(DynamicLookupExpr):
pass
class DynamicSubscriptExpr(DynamicLookupExpr):
pass
class ForcedCheckedCastExpr(CheckedCastExpr):
pass
class IsExpr(CheckedCastExpr):
pass
class MagicIdentifierLiteralExpr(BuiltinLiteralExpr):
kind: string
class NumberLiteralExpr(BuiltinLiteralExpr):
pass
class StringLiteralExpr(BuiltinLiteralExpr):
value: string
class FloatLiteralExpr(NumberLiteralExpr):
string_value: string
class IntegerLiteralExpr(NumberLiteralExpr):
string_value: string
class AnyPattern(Pattern):
pass
class BindingPattern(Pattern):
sub_pattern: Pattern | child
class BoolPattern(Pattern):
value: boolean
class EnumElementPattern(Pattern):
element: EnumElementDecl
sub_pattern: optional[Pattern] | child
class ExprPattern(Pattern):
sub_expr: Expr | child
class IsPattern(Pattern):
cast_type_repr: optional["TypeRepr"] | child
sub_pattern: optional[Pattern] | child
class NamedPattern(Pattern):
var_decl: VarDecl
class OptionalSomePattern(Pattern):
sub_pattern: Pattern | child
class ParenPattern(Pattern):
sub_pattern: Pattern | child
class TuplePattern(Pattern):
elements: list[Pattern] | child
class TypedPattern(Pattern):
sub_pattern: Pattern | child
type_repr: optional["TypeRepr"] | child
@group("stmt")
@qltest.test_with("SwitchStmt")
class CaseLabelItem(AstNode):
pattern: Pattern | child
guard: optional[Expr] | child
class AvailabilitySpec(AstNode):
"""
An availability spec, that is, part of an `AvailabilityInfo` condition. For example `iOS 12` and `*` in:
```
if #available(iOS 12, *)
```
"""
platform: optional[string]
version: optional[string]
is_wildcard: predicate
class AvailabilityInfo(AstNode):
"""
An availability condition of an `if`, `while`, or `guard` statements.
Examples:
```
if #available(iOS 12, *) {
// Runs on iOS 12 and above
} else {
// Runs only anything below iOS 12
}
if #unavailable(macOS 10.14, *) {
// Runs only on macOS 10 and below
}
```
"""
is_unavailable: predicate | doc("it is #unavailable as opposed to #available")
specs: list[AvailabilitySpec] | child
@group("stmt")
class ConditionElement(AstNode):
boolean: optional[Expr] | child
pattern: optional[Pattern] | child
initializer: optional[Expr] | child
availability: optional[AvailabilityInfo] | child
@group("stmt")
class StmtCondition(AstNode):
elements: list[ConditionElement] | child
class BraceStmt(Stmt):
variables: list[VarDecl] | synth | child | doc("variable declared in the scope of this brace statement")
elements: list[AstNode] | child
class BreakStmt(Stmt):
target_name: optional[string]
target: optional[Stmt]
@qltest.test_with("SwitchStmt")
class CaseStmt(Stmt):
labels: list[CaseLabelItem] | child
variables: list[VarDecl] | child
body: Stmt | child
class ContinueStmt(Stmt):
target_name: optional[string]
target: optional[Stmt]
class DeferStmt(Stmt):
body: BraceStmt | child
class FailStmt(Stmt):
pass
class FallthroughStmt(Stmt):
fallthrough_source: CaseStmt
fallthrough_dest: CaseStmt
class LabeledStmt(Stmt):
label: optional[string]
class PoundAssertStmt(Stmt):
condition: Expr
message: string
class ReturnStmt(Stmt):
result: optional[Expr] | child
class ThrowStmt(Stmt):
sub_expr: Expr | child
class YieldStmt(Stmt):
results: list[Expr] | child
@qltest.test_with('SingleValueStmtExpr')
class ThenStmt(Stmt):
""" A statement implicitly wrapping values to be used in branches of if/switch expressions. For example in:
```