P4::ChooseErrorRepresentation Class Reference

#include <convertErrors.h>

Inheritance diagram for P4::ChooseErrorRepresentation:

Public Member Functions
virtual IR::IndexedVector< IR::SerEnumMember > *	assignValues (IR::Type_Error *type, unsigned width) const
virtual bool	convert (const IR::Type_Error *type) const =0
	If true this type has to be converted.
virtual unsigned	errorSize (unsigned errorCount) const =0

Detailed Description

Policy function: given a number of error values should return the size of a Type_Bits type used to represent the values. This class is lefted from enum conversion path.

Member Function Documentation

assignValues()

IR::IndexedVector< IR::SerEnumMember > * P4::ChooseErrorRepresentation::assignValues ( IR::Type_Error * type, unsigned width ) const

virtual

This function allows backends to override the values for the error constants. Default values for error constants is a sequence of numbers starting with 0.

errorSize()

virtual unsigned P4::ChooseErrorRepresentation::errorSize ( unsigned errorCount ) const

pure virtual

errorCount is the number of different error values. The returned value is the width of Type_Bits used to represent the error. Obviously, we must have 2^(return) >= errorCount.