Enum LayoutError 

pub enum LayoutError {
    Incomplete,
    Function,
    Variable,
    TooLarge,
}

Why a type has no layout.

Variants

Incomplete

The type is incomplete: void, an array with no size, or a record or enumeration whose definition has not been seen. GNU C gives sizeof(void) the value one, and that is a dialect decision made where there is a warning to emit, not here.

Function

The type is a function type, which has no size at all. GNU C gives it the value one for the same reason it does for void.

Variable

The type is complete and how large it is depends on something the program computes, which is a variable length array or a record with one among its members.

Not a diagnostic on its own. Every one of these has a size, worked out where the declaration carrying it was reached, and this is what tells a caller to go and ask for it rather than to report that there is none. align still answers for one.

TooLarge

The type is complete and describes an object larger than one may be, which an array declaration can ask for by multiplying two innocent looking numbers.

The limit is TargetInfo::max_object_size, which is PTRDIFF_MAX and not the address space: an object of every byte there is would have a pointer subtraction across it with no answer.

Trait Implementations

impl Clone for LayoutError

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for LayoutError

impl Debug for LayoutError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for LayoutError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for LayoutError

impl Error for LayoutError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for LayoutError

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for LayoutError