Is it a Lexer's Job to Parse Numbers and Strings?

Question

Is it a lexer\'s job to parse numbers and strings?

This may or may not sound dumb, given that fact that I\'m asking whether a lexer should parse in

Answer 1

I assume you want to treat "123.456" as a whole value, in which case you will pass it wholesale to the parser, unless you need to code it somehow, like

struct DecimalRep{
    double mantissa,
    double exponent 

}

but I guess it depends all on what the parser expects.