dart::RegExpLookaround Class Reference

#include <regexp_ast.h>

Inheritance diagram for dart::RegExpLookaround:

Classes
class	Builder

Public Types
enum	Type { LOOKAHEAD , LOOKBEHIND }

Public Member Functions
	RegExpLookaround (RegExpTree *body, bool is_positive, intptr_t capture_count, intptr_t capture_from, Type type)
virtual void *	Accept (RegExpVisitor *visitor, void *data)
virtual RegExpNode *	ToNode (RegExpCompiler *compiler, RegExpNode *on_success)
virtual RegExpLookaround *	AsLookaround ()
virtual Interval	CaptureRegisters () const
virtual bool	IsLookaround () const
virtual bool	IsAnchoredAtStart () const
virtual intptr_t	min_match () const
virtual intptr_t	max_match () const
RegExpTree *	body () const
bool	is_positive () const
intptr_t	capture_count () const
intptr_t	capture_from () const
Type	type () const
Public Member Functions inherited from dart::RegExpTree
virtual	~RegExpTree ()
virtual bool	IsTextElement () const
virtual bool	IsAnchoredAtEnd () const
virtual void	AppendToText (RegExpText *text)
void	Print ()
Public Member Functions inherited from dart::ZoneAllocated
	ZoneAllocated ()
void *	operator new (size_t size)
void *	operator new (size_t size, Zone *zone)
void	operator delete (void *pointer)

Additional Inherited Members
Static Public Attributes inherited from dart::RegExpTree
static constexpr intptr_t	kInfinity = kMaxInt32

Detailed Description

Definition at line 346 of file regexp_ast.h.

Member Enumeration Documentation

Type

enum dart::RegExpLookaround::Type

Enumerator
LOOKAHEAD
LOOKBEHIND

Definition at line 348 of file regexp_ast.h.

{ LOOKAHEAD, LOOKBEHIND };

Constructor & Destructor Documentation

RegExpLookaround()

dart::RegExpLookaround::RegExpLookaround ( RegExpTree *  body, bool  is_positive, intptr_t  capture_count, intptr_t  capture_from, Type  type  )

inline

Definition at line 349 of file regexp_ast.h.

      : body_(body),
        is_positive_(is_positive),
        capture_count_(capture_count),
        capture_from_(capture_from),
        type_(type) {}

Member Function Documentation

Accept()

virtual void * dart::RegExpLookaround::Accept ( RegExpVisitor *  visitor, void *  data  )

virtual

Implements dart::RegExpTree.

AsLookaround()

virtual RegExpLookaround * dart::RegExpLookaround::AsLookaround ( )

virtual

body()

RegExpTree * dart::RegExpLookaround::body ( ) const

inline

Definition at line 368 of file regexp_ast.h.

{ return body_; }

capture_count()

intptr_t dart::RegExpLookaround::capture_count ( ) const

inline

Definition at line 370 of file regexp_ast.h.

{ return capture_count_; }

capture_from()

intptr_t dart::RegExpLookaround::capture_from ( ) const

inline

Definition at line 371 of file regexp_ast.h.

{ return capture_from_; }

CaptureRegisters()

Interval dart::RegExpLookaround::CaptureRegisters ( ) const

virtual

Reimplemented from dart::RegExpTree.

Definition at line 54 of file regexp_ast.cc.

                                                  {
  return body()->CaptureRegisters();
}

is_positive()

bool dart::RegExpLookaround::is_positive ( ) const

inline

Definition at line 369 of file regexp_ast.h.

{ return is_positive_; }

IsAnchoredAtStart()

bool dart::RegExpLookaround::IsAnchoredAtStart ( ) const

virtual

Reimplemented from dart::RegExpTree.

Definition at line 119 of file regexp_ast.cc.

                                               {
  return is_positive() && type() == LOOKAHEAD && body()->IsAnchoredAtStart();
}

IsLookaround()

virtual bool dart::RegExpLookaround::IsLookaround ( ) const

virtual

max_match()

virtual intptr_t dart::RegExpLookaround::max_match ( ) const

inlinevirtual

Implements dart::RegExpTree.

Definition at line 367 of file regexp_ast.h.

{ return 0; }

min_match()

virtual intptr_t dart::RegExpLookaround::min_match ( ) const

inlinevirtual

Implements dart::RegExpTree.

Definition at line 366 of file regexp_ast.h.

{ return 0; }

ToNode()

RegExpNode * dart::RegExpLookaround::ToNode ( RegExpCompiler *  compiler, RegExpNode *  on_success  )

virtual

Implements dart::RegExpTree.

Definition at line 4540 of file regexp.cc.

                                                             {
  intptr_t stack_pointer_register = compiler->AllocateRegister();
  intptr_t position_register = compiler->AllocateRegister();
 
  const intptr_t registers_per_capture = 2;
  const intptr_t register_of_first_capture = 2;
  intptr_t register_count = capture_count_ * registers_per_capture;
  intptr_t register_start =
      register_of_first_capture + capture_from_ * registers_per_capture;
 
  RegExpNode* result;
  bool was_reading_backward = compiler->read_backward();
  compiler->set_read_backward(type() == LOOKBEHIND);
  Builder builder(is_positive(), on_success, stack_pointer_register,
                  position_register, register_count, register_start);
  RegExpNode* match = body_->ToNode(compiler, builder.on_match_success());
  result = builder.ForMatch(match);
  compiler->set_read_backward(was_reading_backward);
  return result;
}

type()

Type dart::RegExpLookaround::type ( ) const

inline

Definition at line 372 of file regexp_ast.h.

{ return type_; }

---

The documentation for this class was generated from the following files:

• third_party/dart-lang/sdk/runtime/vm/regexp_ast.h
• third_party/dart-lang/sdk/runtime/vm/regexp.cc
• third_party/dart-lang/sdk/runtime/vm/regexp_ast.cc