size_of in core::intrinsics - Rust
Description: The size of a type in bytes.

## size_of

# Function size_of

Source

    pub const fn size_of<T>() -> usize

🔬This is a nightly-only experimental API. (`core_intrinsics`)
Expand description

The size of a type in bytes.

Note that, unlike most intrinsics, this is safe to call; it does not require an `unsafe` block. Therefore, implementations must not require the user to uphold any safety invariants.

More specifically, this is the offset in bytes between successive items of the same type, including alignment padding.

Note that, unlike most intrinsics, this can only be called at compile-time as backends do not have an implementation for it. The only caller (its stable counterpart) wraps this intrinsic call in a `const` block so that backends only see an evaluated constant.

The stabilized version of this intrinsic is `core::mem::size_of`.