com.oracle.truffle.regex.tregex.parser

Interface RegexFeatureSet

@FunctionalInterface
public interface RegexFeatureSet

A predicate that describes the set of regular expressions supported by the regex compilers being used.

Field Summary

Fields

Modifier and Type	Field and Description
static RegexFeatureSet	DEFAULT

Method Summary

Modifier and Type	Method and Description
default void	checkSupport(RegexSource source, RegexFeatures features)
Optional<String>	testSupport(RegexSource source, RegexFeatures features) Tests whether or not a regular expression is supported.

Field Detail

DEFAULT

static final RegexFeatureSet DEFAULT

Method Detail

testSupport

Optional<String> testSupport(RegexSource source,
                             RegexFeatures features)

Tests whether or not a regular expression is supported. Returns a descriptive error message if it is not.

Parameters:

source - the regular expression whose features are in question

features - a record of features detected in the expression by the parser that validated its well-formedness

Returns:

• Optional.empty() if the regex is supported
• Optional.of(err) if the regex is not supported; err is the error message

checkSupport

default void checkSupport(RegexSource source,
                          RegexFeatures features)
                   throws UnsupportedRegexException

Throws:

UnsupportedRegexException