Cpp.Decltype Class

Namespace: Cpp
Superclasses: AstNodeProperties

Represents the decltype nodes in the syntax tree of your code

Since R2026a

Description

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

Predicates

expand all

Type

Type	Raisable	Printable
`Decltype`	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 Decltype &dt)`	Finds syntax nodes of the type `Decltype` in your C++ code and returns them as `dt`. A `Decltype` represents the `decltype` type specifier used to deduce a type from an expression.
`isa(Cpp.Node.Node node)`	Checks if `node` is a `Decltype`. Use this relation if you want to negate the condition (for example: `not Cpp.Decltype.isa(n)`).
`cast(Cpp.Node.Node node, required Decltype &cast)`	Finds syntax nodes of the type `Decltype` from the nodes in `node`. Retrieval occurs if `node` is compatible with the `Decltype` type. Use this relation if you need further `Decltype` properties.
`expression(Decltype self, Cpp.Node.Node &child)`	Matches the expression inside a `decltype` specifier. For example, in `decltype(x + y) z;`, this predicate matches the `x + y` expression.
`auto(Decltype self, Cpp.Node.Node &child)`	Matches the `auto` keyword used in a `decltype(auto)` construct. For example, in `decltype(auto) f();`, this predicate matches `auto`.
`isEnclosedInDecltype(Cpp.Node.Node child)`	Checks if `child` appears inside a `Decltype`.
`getEnclosingDecltype(Cpp.Node.Node child, required Decltype &parent)`	Finds the nearest enclosing `Decltype` ancestor of `child` and returns it as `parent`.

Version History

Introduced in R2026a