Represents an abstract function effect, using just an enumeration describing its kind. More...

#include "clang/AST/TypeBase.h"

Public Types
enum class	Kind : uint8_t { NonBlocking , NonAllocating , Blocking , Allocating , Last = Allocating }
	Identifies the particular effect. More...
enum	FlagBit : Flags { FE_InferrableOnCallees = 0x1 , FE_ExcludeThrow = 0x2 , FE_ExcludeCatch = 0x4 , FE_ExcludeObjCMessageSend = 0x8 , FE_ExcludeStaticLocalVars = 0x10 , FE_ExcludeThreadLocalVars = 0x20 }
using	Flags = unsigned
	Flags describing some behaviors of the effect.

Public Member Functions
	FunctionEffect (Kind K)
Kind	kind () const
	The kind of the effect.
Kind	oppositeKind () const
	Return the opposite kind, for effects which have opposites.
uint32_t	toOpaqueInt32 () const
	For serialization.
Flags	flags () const
	Flags describing some behaviors of the effect.
StringRef	name () const
	The description printed in diagnostics, e.g. 'nonblocking'.
std::optional< FunctionEffect >	effectProhibitingInference (const Decl &Callee, FunctionEffectKindSet CalleeFX) const
	Determine whether the effect is allowed to be inferred on the callee, which is either a FunctionDecl or BlockDecl.
bool	shouldDiagnoseFunctionCall (bool Direct, FunctionEffectKindSet CalleeFX) const

Static Public Member Functions
static FunctionEffect	fromOpaqueInt32 (uint32_t Value)

Static Public Attributes
static constexpr size_t	KindCount = static_cast<size_t>(Kind::Last) + 1

Friends
raw_ostream &	operator<< (raw_ostream &OS, const FunctionEffect &Effect)
bool	operator== (FunctionEffect LHS, FunctionEffect RHS)
bool	operator!= (FunctionEffect LHS, FunctionEffect RHS)
bool	operator< (FunctionEffect LHS, FunctionEffect RHS)

Detailed Description

Represents an abstract function effect, using just an enumeration describing its kind.

Definition at line 4877 of file TypeBase.h.

Member Typedef Documentation

◆ Flags

using clang::FunctionEffect::Flags = unsigned

Flags describing some behaviors of the effect.

Definition at line 4890 of file TypeBase.h.

Member Enumeration Documentation

◆ FlagBit

enum clang::FunctionEffect::FlagBit : Flags

Enumerator
FE_InferrableOnCallees
FE_ExcludeThrow
FE_ExcludeCatch
FE_ExcludeObjCMessageSend
FE_ExcludeStaticLocalVars
FE_ExcludeThreadLocalVars

Definition at line 4891 of file TypeBase.h.

◆ Kind

enum class clang::FunctionEffect::Kind : uint8_t

strong

Identifies the particular effect.

Enumerator
NonBlocking
NonAllocating
Blocking
Allocating
Last

Definition at line 4880 of file TypeBase.h.

Constructor & Destructor Documentation

◆ FunctionEffect()

clang::FunctionEffect::FunctionEffect ( Kind K )

inlineexplicit

Definition at line 4913 of file TypeBase.h.

Referenced by effectProhibitingInference(), fromOpaqueInt32(), operator!=, operator<, operator<<, operator==, and shouldDiagnoseFunctionCall().

Member Function Documentation

◆ effectProhibitingInference()

std::optional< FunctionEffect > FunctionEffect::effectProhibitingInference	(	const Decl &	Callee,
		FunctionEffectKindSet	CalleeFX ) const

Determine whether the effect is allowed to be inferred on the callee, which is either a FunctionDecl or BlockDecl.

If the returned optional is empty, inference is permitted; otherwise it holds the effect which blocked inference. Example: This allows nonblocking(false) to prevent inference for the function.

Definition at line 5543 of file Type.cpp.

References Allocating, Blocking, FunctionEffect(), kind(), NonAllocating, and NonBlocking.