Use an expression as `lhs` in a mapping

Question

I know that if I do:

:inoremap <expr> . InsertDot()

the result of InsertDot() will be inserted as {rhs} of the mapping.

I need to do the same but with the {lhs}, in order to be able to define some dynamic mappings that will take as key sequence what is defined in a var.

Is it possible? If so, how?

Thanks!

Answer 1

You could use the execute command. If your lhs is in the variable l:lhs you can do:

execute "inoremap <expr> " . l:lhs . " InsertDot()"

execute will expand the content of the variable and then execute the string obtained by the concatenation of the quoted string and the value of the variable.

See :h :execute for more details.