Function match_result_code_with_expected_bytes

Source

pub fn match_result_code_with_expected_bytes<F, T>(
    result_code: i32,
    expected_num_bytes: usize,
    on_success: F,
) -> Result<T>where
    F: FnOnce() -> T,

Expand description

Evaluates a result code against an expected number of bytes and executes a closure on exact match.

§Arguments

result_code - An integer representing the operation result code
expected_num_bytes - The exact number of bytes expected to have been written
on_success - A closure that will be executed if the result code matches expected bytes

§Type Parameters

F - The type of the closure
T - The return type of the closure

§Returns

Returns a Result<T> where:

Ok(T) - Contains the value returned by the closure if result_code matches expected_num_bytes
Err(Error) - For negative result codes

§Panics

Panics if result_code is non-negative but doesn’t match expected_num_bytes. This signals an internal invariant violation (a host or stdlib bug) for which the caller has no recoverable course of action, rather than an input error.

§Note

This function requires an exact match between the result code and expected byte count, making it suitable for operations where the exact amount of data written is critical.

match_result_code_with_expected_bytes