P4::DoConvertEnums Class Reference

Inheritance diagram for P4::DoConvertEnums:

Public Member Functions
	DoConvertEnums (ChooseEnumRepresentation *policy, TypeMap *typeMap)
const IR::Node *	postorder (IR::Member *expression) override
	process enum expression, e.g., X.a
const IR::Node *	postorder (IR::Type_Name *type) override
const IR::Node *	preorder (IR::Type_Enum *type) override

Friends
class	ConvertEnums

Detailed Description

implement a pass to convert Type_Enum to Type_Bits

User must provide a class to extend ChooseEnumRepresentation to specify the width of the generated Type_Bits. User must also implement a policy to decide whether an Enum type shall be converted.

Example:

enum e { A, B, }

struct st { // Type_Name A a; }

if the policy is to convert enum to bit<32>, then the above is replaced by:

struct st { // Type_Bits bit<32> a; }

Precondition

none

Postcondition

all Type_Enum types accepted by 'policy' are converted.