Macro convert_expr_to_str_or_err 

macro_rules! convert_expr_to_str_or_err {
    ($expr:expr, $traversal_state:expr, $fns:expr, $error_msg:expr) => { ... };
}

Macro to safely convert an expression to a string with error Result handling. Returns the string on success, or returns Err(anyhow::Error) on failure.

This macro is designed for use in functions that return Result<T, anyhow::Error>.

Usage

let str_value = expr_to_str_or_err!(expr, traversal_state, fns, "Expression is not a string");

Arguments

• $expr: The expression to convert
• $traversal_state: Mutable reference to StateManager
• $fns: Reference to FunctionMap
• $error_msg: Error message string literal