com.oracle.truffle.regex.tregex.parser.flavors

Class RegexFlavor

java.lang.Object

com.oracle.truffle.regex.tregex.parser.flavors.RegexFlavor

Direct Known Subclasses:

ECMAScriptFlavor, PythonFlavor, RubyFlavor

public abstract class RegexFlavor
extends Object

An implementation of a dialect (flavor) of regular expressions other than ECMAScript. It provides support for validating and parsing (building the AST) of regular expressions.

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	BACKREFERENCES_TO_UNMATCHED_GROUPS_FAIL
protected static int	EMPTY_CHECKS_MONITOR_CAPTURE_GROUPS
protected static int	FAILING_EMPTY_CHECKS_DONT_BACKTRACK
protected static int	LOOKBEHINDS_RUN_LEFT_TO_RIGHT
protected static int	NESTED_CAPTURE_GROUPS_KEPT_ON_LOOP_REENTRY
protected static int	USES_LAST_GROUP_RESULT_FIELD

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RegexFlavor(int traits)

Method Summary

Modifier and Type	Method and Description
boolean	backreferencesToUnmatchedGroupsFail()
boolean	canHaveEmptyLoopIterations()
abstract RegexParser	createParser(RegexLanguage language, RegexSource source, CompilationBuffer compilationBuffer)
abstract RegexValidator	createValidator(RegexSource source)
boolean	emptyChecksMonitorCaptureGroups()
boolean	failingEmptyChecksDontBacktrack()
boolean	lookBehindsRunLeftToRight()
boolean	nestedCaptureGroupsKeptOnLoopReentry()
boolean	usesLastGroupResultField()

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BACKREFERENCES_TO_UNMATCHED_GROUPS_FAIL

protected static final int BACKREFERENCES_TO_UNMATCHED_GROUPS_FAIL

See Also:

Constant Field Values

EMPTY_CHECKS_MONITOR_CAPTURE_GROUPS

protected static final int EMPTY_CHECKS_MONITOR_CAPTURE_GROUPS

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Constant Field Values

NESTED_CAPTURE_GROUPS_KEPT_ON_LOOP_REENTRY

protected static final int NESTED_CAPTURE_GROUPS_KEPT_ON_LOOP_REENTRY

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Constant Field Values

FAILING_EMPTY_CHECKS_DONT_BACKTRACK

protected static final int FAILING_EMPTY_CHECKS_DONT_BACKTRACK

See Also:

Constant Field Values

USES_LAST_GROUP_RESULT_FIELD

protected static final int USES_LAST_GROUP_RESULT_FIELD

See Also:

Constant Field Values

LOOKBEHINDS_RUN_LEFT_TO_RIGHT

protected static final int LOOKBEHINDS_RUN_LEFT_TO_RIGHT

See Also:

Constant Field Values

Constructor Detail

RegexFlavor

protected RegexFlavor(int traits)

Method Detail

createParser

public abstract RegexParser createParser(RegexLanguage language,
                                         RegexSource source,
                                         CompilationBuffer compilationBuffer)

createValidator

public abstract RegexValidator createValidator(RegexSource source)

backreferencesToUnmatchedGroupsFail

public boolean backreferencesToUnmatchedGroupsFail()

emptyChecksMonitorCaptureGroups

public boolean emptyChecksMonitorCaptureGroups()

nestedCaptureGroupsKeptOnLoopReentry

public boolean nestedCaptureGroupsKeptOnLoopReentry()

failingEmptyChecksDontBacktrack

public boolean failingEmptyChecksDontBacktrack()

canHaveEmptyLoopIterations

public boolean canHaveEmptyLoopIterations()

usesLastGroupResultField

public boolean usesLastGroupResultField()

lookBehindsRunLeftToRight

public boolean lookBehindsRunLeftToRight()