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

Class RubyFlavorProcessor

java.lang.Object

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

All Implemented Interfaces:

RegexFlavorProcessor

public final class RubyFlavorProcessor
extends Object
implements RegexFlavorProcessor

Implements the parsing and translating of Ruby regular expressions to ECMAScript regular expressions.

See Also:

RegexFlavorProcessor

Field Summary

Fields

Modifier and Type	Field and Description
static String	WORD_BOUNDARY
static Pattern	WORD_CHARS_PATTERN
static String	WORD_NON_BOUNDARY

Constructor Summary

Constructors

Constructor and Description
RubyFlavorProcessor(RegexSource source)

Method Summary

Modifier and Type	Method and Description
AbstractRegexObject	getFlags() Returns a TruffleObject representing the compilation flags which were set for the regular expression.
Map<String,Integer>	getNamedCaptureGroups() Returns a map from the names of capture groups to their indices.
int	getNumberOfCaptureGroups() Returns the number of capture groups contained in the expression, including capture group 0.
boolean	isProperEscapeNext() Indicates whether the following is a proper escape sequence, which cannot be a part of a string.
boolean	isQuantifierNext() Indicates whether a quantifier is coming up next.
boolean	isUnicodePattern() Returns true if the generated ECMAScript pattern is a Unicode pattern (matches Unicode code points instead of UTF-16 code units).
RegexSource	toECMAScriptRegex() Runs the parser and emits an equivalent ECMAScript regex.
void	validate() Runs the parser without trying to find an equivalent ECMAScript regex.

Methods inherited from class java.lang.Object

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

Field Detail

WORD_CHARS_PATTERN

public static final Pattern WORD_CHARS_PATTERN

WORD_BOUNDARY

public static final String WORD_BOUNDARY

See Also:

Constant Field Values

WORD_NON_BOUNDARY

public static final String WORD_NON_BOUNDARY

See Also:

Constant Field Values

Constructor Detail

RubyFlavorProcessor

public RubyFlavorProcessor(RegexSource source)

Method Detail

getNumberOfCaptureGroups

public int getNumberOfCaptureGroups()

Description copied from interface: RegexFlavorProcessor

Returns the number of capture groups contained in the expression, including capture group 0.

Specified by:

getNumberOfCaptureGroups in interface RegexFlavorProcessor

getNamedCaptureGroups

public Map<String,Integer> getNamedCaptureGroups()

Description copied from interface: RegexFlavorProcessor

Returns a map from the names of capture groups to their indices. If the regular expression had no named capture groups, returns null.

Specified by:

getNamedCaptureGroups in interface RegexFlavorProcessor

getFlags

public AbstractRegexObject getFlags()

Description copied from interface: RegexFlavorProcessor

Returns a TruffleObject representing the compilation flags which were set for the regular expression. The returned object responds to 'READ' messages on names which correspond to the names of the flags as used in the language from which the flavor originates.

Specified by:

getFlags in interface RegexFlavorProcessor

isUnicodePattern

public boolean isUnicodePattern()

Description copied from interface: RegexFlavorProcessor

Returns true if the generated ECMAScript pattern is a Unicode pattern (matches Unicode code points instead of UTF-16 code units).

Specified by:

isUnicodePattern in interface RegexFlavorProcessor

validate

public void validate()
              throws RegexSyntaxException

Description copied from interface: RegexFlavorProcessor

Runs the parser without trying to find an equivalent ECMAScript regex. Useful for early error detection.

Specified by:

validate in interface RegexFlavorProcessor

Throws:

RegexSyntaxException - when the pattern or the flags are not well-formed

toECMAScriptRegex

public RegexSource toECMAScriptRegex()
                              throws RegexSyntaxException,
                                     UnsupportedRegexException

Description copied from interface: RegexFlavorProcessor

Runs the parser and emits an equivalent ECMAScript regex.

Specified by:

toECMAScriptRegex in interface RegexFlavorProcessor

Returns:

an ECMAScript RegexSource compatible to the input one

Throws:

RegexSyntaxException - when the pattern or the flags are not well-formed

UnsupportedRegexException - when the pattern cannot be translated to an equivalent ECMAScript pattern

isProperEscapeNext

public boolean isProperEscapeNext()

Indicates whether the following is a proper escape sequence, which cannot be a part of a string. Those are all escape sequences with the difference of those handled by RubyFlavorProcessor.fetchEscapedChar().

isQuantifierNext

public boolean isQuantifierNext()

Indicates whether a quantifier is coming up next.