Function try_from_sexp 

pub unsafe fn try_from_sexp<T>(x: SEXP) -> Result<T, T::Error>
where
    T: TryFromSexp,

Convert an R SEXP to a Rust type, returning a Result.

Unlike from_sexp, this function returns a Result instead of calling rf_error on failure. Useful when you want custom error handling.

Type Parameters

• T - Target Rust type (must implement TryFromSexp)

Arguments

• x - R value to convert

Returns

Ok(T) on success, Err with the conversion error on failure.

Safety

• x must be a valid SEXP
• Must be called on R’s main thread

Example

match unsafe { try_from_sexp::<i32>(argv[0]) } {
    Ok(val) => { /* use val */ }
    Err(e) => {
        // Custom error handling
        rf_error(&format!("argument 1: {}", e));
    }
}