Class IsUnicodeEscapeAt

java.lang.Object

org.ek9lang.compiler.support.literals.IsUnicodeEscapeAt

All Implemented Interfaces:

BiPredicate<String,Integer>

public final class IsUnicodeEscapeAt
extends Object
implements BiPredicate<String,Integer>

THE test for a unicode escape: a backslash, a 'u', then exactly four ASCII hex digits - the lexer's own UnicodeEscape. Integer.parseInt(hex, 16) alone also takes a sign and any Unicode digit, so backslash-u "+041" decoded to 'A' and backslash-u "-001" to U+FFFF (front-end audit FE73). Decode only when this holds: both decoders (CharacterLiteralValue, DecodedEscapes) and phase 1's E07903 check ask it. (Not written literally: javac decodes unicode escapes even in comments.)

The arguments are the literal's text and the offset of the backslash.

Constructor Summary

Constructors

Constructor	Description
IsUnicodeEscapeAt()

Method Summary

Modifier and Type	Method	Description
boolean	test(String text, Integer offset)

Methods inherited from class Object

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

Methods inherited from interface BiPredicate

and, negate, or

Constructor Details

IsUnicodeEscapeAt

public IsUnicodeEscapeAt()

Method Details

test

public boolean test(String text,
 Integer offset)

Specified by:

test in interface BiPredicate<String,Integer>