I want to understand the TeX instructions


Especially, I want understand what meaning of ` symbol before \edef.
As I know ifx compare two statements, symbol ` for symbol taking - `\A takes a code of symbol A. Or I am wrong? Thanks.

  • I have replaced the ` character with a ' character as there is an interference with TeX.SX formatting and the TeX character.
    – percusse
    Feb 21, 2012 at 14:29

1 Answer 1


The ` there has no connection to the use of ` to get the character code of a symbol, it should be read as


that is if the two tokens \@tempb and ` are equal then define \next to be something. They will be equal if for example \@tempb had been defined by


or (if I recognise that code fragment:-) if it had been defined by \futurelet rather than \let.

  • Yes, David, this is fragment from one of yours answers on my question. I want understand those deeper. Thanks for explanation.
    – Andrew
    Feb 21, 2012 at 14:49

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