Macro entity

Preprocessor macro directives can be queried using the macro entity.

Initial selector

• @macro: this selector can be used to start a query with the currently selected macro.

Selectors

After the name of the selector between parentheses you can find the type of the elements in the resulted set.

• refs (expression): returns every expression that refers to the given macro with the form ?Macro....
• file (file): returns the file entity that the macro is defined in.

Properties

Macro entities have the following properties:

• name (atom, string): returns the identifier of the macro.
• arity (int): returns the arity of a given parametric macro. If the macro is a constant, the arity is 0.
• const (bool): returns true if the given macro is a constant. Note, that there are parametric macros with no parameters, these are treated as non-constant macros.