Lexer Error Haiku

Such a character
I can never abide by
sayeth the Lexer

Zero X alone
shall never make a proper
hexadecimal

Where are my digits?
says the lonely dot, forlorn.
Autumn's last blossom

Thrust from the bosom
of a floating point number
by an end of file

You raise an issue
about your lack of power
to raise to powers

Here is a comment,
in regards to your comment,
which is not close-ed

A leading zero?
Everybody knows that it
is extraneous