Class UnicodeEscapeOrError

java.lang.Object

org.ek9lang.compiler.phase1.UnicodeEscapeOrError

All Implemented Interfaces:

Consumer<EK9Parser.StringLitContext>

final class UnicodeEscapeOrError
extends Object
implements Consumer<EK9Parser.StringLitContext>

A backslash-u in a String literal must be followed by exactly four hex digits (E07903). The lexer only ever took backslash-u plus four ASCII hex digits as an escape, but the decoder re-read the text with parseInt(hex, 16), which also takes a sign and any Unicode digit: backslash-u "+041" became 'A' and backslash-u "-001" U+FFFF (front-end audit FE73). Steve: a new code, so a malformed escape is named for what it is. Checked in a double-quoted String and in the text of a backtick String; not in a directive's String, which is test metadata.

(No backslash-u appears literally in this comment: javac decodes unicode escapes even in comments.)

Constructor Summary

Constructors

Constructor	Description
UnicodeEscapeOrError(ErrorListener errorListener)

Method Summary

Modifier and Type	Method	Description
void	accept(EK9Parser.StringLitContext ctx)

Methods inherited from class Object

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

Methods inherited from interface Consumer

andThen

Constructor Details

UnicodeEscapeOrError

UnicodeEscapeOrError(ErrorListener errorListener)

Method Details

accept

public void accept(EK9Parser.StringLitContext ctx)

Specified by:

accept in interface Consumer<EK9Parser.StringLitContext>