Function parse 

pub fn parse(formula: &str) -> Result<Expr, ParseError>

👎Deprecated since 0.7.0:

use Engine::sheets()/Engine::excel() and engine.parse() — engine flavor is required; see ADR 2026-04-27; removal target: 0.7.0 coordinated release

Parse a formula string into an expression tree.

The formula must start with =. Returns a ParseError if the input is not a valid formula.