P4::EqualityConstraint Class Reference

Requires two types to be equal. More...

#include <typeConstraints.h>

Inheritance diagram for P4::EqualityConstraint:

Public Member Functions
	EqualityConstraint (const IR::Type *left, const IR::Type *right, const IR::Node *origin)
	EqualityConstraint (const IR::Type *left, const IR::Type *right, const TypeConstraint *derivedFrom)
BinaryConstraint *	create (const IR::Type *left, const IR::Type *right) const override
void	dbprint (std::ostream &out) const override
	DECLARE_TYPEINFO (EqualityConstraint, BinaryConstraint)
bool	reportError (const TypeVariableSubstitution *subst) const override
template<typename... Args>
bool	reportError (const TypeVariableSubstitution *subst, const char *format, Args &&...args) const
Public Member Functions inherited from P4::BinaryConstraint
	DECLARE_TYPEINFO (BinaryConstraint, TypeConstraint)
Public Member Functions inherited from P4::TypeConstraint
	DECLARE_TYPEINFO (TypeConstraint)
template<typename... Args>
bool	reportError (const TypeVariableSubstitution *subst, const char *format, Args &&...args) const
void	setError (std::string_view format, std::initializer_list< const IR::Node * > nodes)
Public Member Functions inherited from P4::IHasDbPrint
void	print () const
Public Member Functions inherited from P4::ICastable
template<typename T >
T &	as ()
	Tries to convert the class to type T. A BUG occurs if the cast fails.
template<typename T >
const T &	as () const
	Tries to convert the class to type T. A BUG occurs if the cast fails.
template<typename T >
T *	checkedTo ()
	Performs a checked cast. A BUG occurs if the cast fails.
template<typename T >
const T *	checkedTo () const
	Performs a checked cast. A BUG occurs if the cast fails.
Public Member Functions inherited from P4::RTTI::Base
template<typename T >
bool	is () const noexcept
virtual bool	isA (TypeId typeId) const noexcept=0
template<typename T >
const T *	to () const noexcept
	Same as to, but returns const pointer to T.
template<typename T >
T *	to () noexcept
virtual TypeId	typeId () const noexcept=0

Additional Inherited Members
Public Attributes inherited from P4::BinaryConstraint
const IR::Type *	left
const IR::Type *	right
Protected Member Functions inherited from P4::BinaryConstraint
	BinaryConstraint (const IR::Type *left, const IR::Type *right, const IR::Node *origin)
	BinaryConstraint (const IR::Type *left, const IR::Type *right, const TypeConstraint *derivedFrom)
void	validate () const
Protected Member Functions inherited from P4::TypeConstraint
	TypeConstraint (const IR::Node *origin)
	TypeConstraint (const TypeConstraint *derivedFrom)
std::string	explain (size_t index, Explain *explainer) const
std::string	localError (Explain *explainer) const
Protected Member Functions inherited from P4::RTTI::Base
virtual const void *	toImpl (TypeId typeId) const noexcept=0
Protected Attributes inherited from P4::TypeConstraint
const TypeConstraint *	derivedFrom = nullptr
	Constraint which produced this one. May be nullptr.
const IR::Node *	origin = nullptr
	Place in source code which originated the contraint. May be nullptr.

Detailed Description

Requires two types to be equal.

Member Function Documentation

create()

BinaryConstraint * P4::EqualityConstraint::create ( const IR::Type * left, const IR::Type * right ) const

inlineoverridevirtual

Implements P4::BinaryConstraint.

dbprint()

void P4::EqualityConstraint::dbprint ( std::ostream & out ) const

inlineoverridevirtual

Implements P4::IHasDbPrint.

reportError() [1/2]

bool P4::EqualityConstraint::reportError ( const TypeVariableSubstitution * subst ) const

inlineoverridevirtual

Implements P4::TypeConstraint.

reportError() [2/2]

template<typename... Args>

bool P4::TypeConstraint::reportError ( const TypeVariableSubstitution * subst, const char * format, Args &&... args ) const

inline

The Constraints actually form a stack and the error message is composed in reverse order, from bottom to top. The top of the stack has no 'derivedFrom' field, and it contains the actual source position where the analysis started.