Il 26/06/24 22:25, Stefan Monnier ha scritto:

Note that "test if a parenthesis in LaTeX (latex-mode) starts a balanced
expression" is a kind of weird request, because it will only return nil
if there's a missing close-paren but not if there are too many
close-parens, i.e. it only detects one half of the imbalances.


        Stefan

For my purposes it is enough.

I need to write a function to interactively resize mathematical parentheses based on their content, such as "\left( ... \right)". So far, I have successfully used `sexp-at-point`, but this function does not recognize balanced expressions that contain ";" and only works with "(" and "[" but not with < etc..

The `forward-sexp` function does not necessarily give an error if the parenthesis does not start a balanced expression. E.g.

$( x + y ]$

here "(" does not start a balanced expression but `forward-sexp` does not return an error.

Gabriele