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Which of the lexical analyser can handle Unicode?

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Which of the lexical analyser can handle Unicode?

(a) Java CC

(b) JFLex

(c) Quex

(d) All of the mentioned

I had been asked this question during a job interview.

I'd like to ask this question from Lexical Analyser topic in section Finite Automata and Regular Expression of Compiler

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Correct option is (d) All of the mentioned

For explanation: JavaCC – JavaCC generates lexical analyzers written in Java.

JFLex – A lexical analyzer generator for Java.

Quex – A fast universal lexical analyzer generator for C and C++.

FsLex – A lexer generator for byte and Unicode character input for F#.

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