pub const MAX_EXPR_DEPTH: usize = 256;Expand description
Maximum expression nesting before the parser refuses.
Chosen well above anything human-written (blue’s own spec/*.b peaks in
single digits) and far below the measured overflow point, so the bound is
hit as a typed Err long before the stack is at risk. A limit that is
merely near the crash point is not a safety bound; it is a race.