Cpp.UnionSpecifier Class

Namespace: Cpp
Superclasses: AstNodeProperties

Represents the union_specifier nodes in the syntax tree of your code

Since R2026a

Description

UnionSpecifier class represents the C++ syntax node union_specifier in your code and contains predicates to query properties and children of this node.

Predicates

expand all

Type

Type	Raisable	Printable
`UnionSpecifier`	Yes	No

Syntaxes

This class defines these predicates that act on the objects of this class. In addition, objects of this class can access the predicates defined by the base class AstNodeProperties. An object of this class is an object of AstNodeProperties class.

Predicates	Description
`is(required UnionSpecifier &u)`	Finds syntax nodes of the type `UnionSpecifier` in your C++ code and returns them as `u`. A `UnionSpecifier` represents a union declaration or definition.
`isa(Cpp.Node.Node node)`	Checks if `node` is a `UnionSpecifier`. Use this relation if you want to negate the condition (for example: `not Cpp.UnionSpecifier.isa(n)`).
`cast(Cpp.Node.Node node, required UnionSpecifier &cast)`	Finds syntax nodes of the type `UnionSpecifier` from the nodes in `node`. Retrieval occurs if `node` is compatible with the `UnionSpecifier` type. Use this relation if you need further `UnionSpecifier` properties.
`name(UnionSpecifier self, Cpp.Node.Node &child)`	Matches the name of the union. For example, in `union MyUnion { int x; }`, this predicate matches `MyUnion`.
`body(UnionSpecifier self, Cpp.Node.Node &child)`	Matches the body of the union definition. For example, in `union MyUnion { int x; float y; }`, this predicate matches the compound block `{ int x; float y; }`.
`baseClassClause(UnionSpecifier self, Cpp.Node.Node &child)`	Matches the base class clause of a union, when present. For example, in `union MyUnion : public Base { }`, this predicate matches `: public Base`.
`msDeclspecModifier(UnionSpecifier self, Cpp.Node.Node &child)`	Matches a Microsoft-specific `__declspec` modifier applied to the union. For example, in `union __declspec(align(16)) MyUnion { }`, this predicate matches `__declspec(align(16))`.
`virtualSpecifier(UnionSpecifier self, Cpp.Node.Node &child)`	Matches a virtual specifier applied to the union. For example, in `union MyUnion final { }`, this predicate matches `final`.
`alignasQualifier(UnionSpecifier self, Cpp.Node.Node &child)`	Matches an `alignas` qualifier applied to the union. For example, in `union alignas(16) MyUnion { }`, this predicate matches `alignas(16)`.
`attributeDeclaration(UnionSpecifier self, Cpp.Node.Node &child)`	Matches an attribute declaration applied to the union. For example, in `union [[deprecated]] MyUnion { }`, this predicate matches `[[deprecated]]`.
`attributeSpecifier(UnionSpecifier self, Cpp.Node.Node &child)`	Matches an attribute specifier applied to the union. For example, in `union [[nodiscard]] MyUnion { }`, this predicate matches `[[nodiscard]]`.
`isEnclosedInUnionSpecifier(Cpp.Node.Node child)`	Checks if `child` appears inside a `UnionSpecifier`.
`getEnclosingUnionSpecifier(Cpp.Node.Node child, required UnionSpecifier &parent)`	Finds the nearest enclosing `UnionSpecifier` ancestor of `child` and returns it as `parent`.

Version History

Introduced in R2026a