Function flag_error 

pub fn flag_error<T, E>(flag: &mut bool, result: Result<T, E>) -> Result<T, E>

Flags an error while propagating the result of a Result type.

This function takes a mutable boolean reference (flag) and a Result value. If the Result is an error (Err), it sets the flag to true, allowing the caller to track if an error occurred without consuming the Result.

The original Result is then returned unchanged.

Type Parameters

• T: The type contained in the Ok variant of the Result.
• E: The type contained in the Err variant of the Result.

Arguments

• flag: A mutable reference to a boolean flag that will be set to true if the Result contains an error.
• result: The Result to check for an error.

Returns

• Returns the provided Result value for further use or propagation.

Examples

use cjtoolkit_structured_validator::common::flag_error::flag_error;
let mut error_occurred = false;
let result: Result<i32, &str> = Err("An error occurred");

let checked_result = flag_error(&mut error_occurred, result);

assert!(error_occurred); // Flag has been set to true.
assert!(checked_result.is_err()); // The result is returned unchanged.

use cjtoolkit_structured_validator::common::flag_error::flag_error;
let mut error_occurred = false;
let result: Result<i32, &str> = Ok(42);

let checked_result = flag_error(&mut error_occurred, result);

assert!(!error_occurred); // Flag remains false.
assert_eq!(checked_result, Ok(42)); // The result is returned unchanged.