Deduction_Guide

class Deduction_Guide (concrete, physical)

C++17 deduction guide

Implemented interfaces:

• implements Conditional_Explicit_Interface

• implements Parameter_List_Interface

Direct parents:

• inherits Definition

Ancestor classes and implemented interfaces:

Conditional_Explicit_Interface, Declaration, Definition, Linked_Node, Operation, Parameter_List_Interface, Physical_IR_Root

Field	Kind	Type	Description
Is_Explicit	attribute	builtin Boolean	Whether the deduction guide was declared as explicit (or dependent conditional explicit in C++20).
Has_Dependent_Explicit	attribute	builtin Boolean	Declared as explicit with a dependent condition.
Class_Template	semantic	class Declaration	The class template to which this deduction guide applies. Will usually be a node of type Composite_Type_Interface, but may also be another type declaration in error cases.
Deduced_Type	syntactic	interface Possibly_Attributed_Type_Interface	The resulting deduced type.
Logical (from Linked_Node)	semantic to logical	class Logical_IR_Root	cross-reference into LIR
Parent (from Physical_IR_Root)	semantic	class Physical_IR_Root	The parent of the node in the syntactic forest.
Original_Position_Index (from Physical_IR_Root)	attribute	builtin SLoc_Index_Type	Internal source location info. If from macro expansion, this location is inside the macro body or macro argument
Original_Position (from Physical_IR_Root)	attribute	builtin SLoc	Source location. If from macro expansion, this location is inside the macro body or macro argument
Position (from Physical_IR_Root)	attribute	builtin SLoc	Source location. If from macro expansion, this location is that of the macro expansion
Artificial (from Physical_IR_Root)	attribute	builtin Boolean	Whether this node was compiler-generated
Parenthesized (from Physical_IR_Root)	attribute	builtin Boolean	Whether this node was enclosed in parentheses (used for expressions)
In_Template_Instance (from Physical_IR_Root)	attribute	builtin Boolean	Whether this node is inside a template instance
Enclosing_Template_Instance (from Physical_IR_Root)	semantic	class Physical_IR_Root	Innermost enclosing template instance if In_Template_Instance is true
Explicit_Condition (from Conditional_Explicit_Interface)	syntactic	class Expression	The constant expression that must evaluate to true or false. null if there was none, i.e., just explicit, which is equivalent to explicit(true).
Parameters (from Parameter_List_Interface)	syntactic	list of class Possibly_Attributed_Parameter_Interface	All parameters, including the ellipsis, but excluding this Usually some Parameter_Definitions, but could also be an Attributed_Definition. Use skip_decorators() to get the parameter itself.