Function lexical_core::write

pub fn write<N: ToLexical>(n: N, bytes: &mut [u8]) -> &mut [u8]

Write number to string.

Returns a subslice of the input buffer containing the written bytes, starting from the same address in memory as the input slice.

• value - Number to serialize.
• bytes - Buffer to write number to.

Panics

Panics if the buffer may not be large enough to hold the serialized number. In order to ensure the function will not panic, provide a buffer with at least {integer}::FORMATTED_SIZE elements.

Example

#[cfg(feature = "write-floats")] {
// import `BUFFER_SIZE` to get the maximum bytes written by the number.
use lexical_core::BUFFER_SIZE;

let mut buffer = [0u8; BUFFER_SIZE];
let float = 3.14159265359_f32;

lexical_core::write(float, &mut buffer);

assert_eq!(&buffer[0..9], b"3.1415927");

This will panic, because the buffer is not large enough:

// note: the buffer is only one byte large
let mut buffer = [0u8; 1];
let float = 3.14159265359_f32;

lexical_core::write(float, &mut buffer);