# Function std::ptr::slice_from_raw_parts

1.42.0 (const: 1.64.0) · source ·

    pub const fn slice_from_raw_parts<T>(data: *const T, len: usize) -> *const [T]

Expand description

Forms a raw slice from a pointer and a length.

The `len` argument is the number of elements, not the number of bytes.

This function is safe, but actually using the return value is unsafe. See the documentation of `slice::from_raw_parts` for slice safety requirements.

## Examples

    use std::ptr;

    // create a slice pointer when starting out with a pointer to the first element
    let x = [5, 6, 7];
    let raw_pointer = x.as_ptr();
    let slice = ptr::slice_from_raw_parts(raw_pointer, 3);
    assert_eq!(unsafe { &*slice }[2], 7);

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