Struct ArgumentsMetadataDecoder 

pub struct ArgumentsMetadataDecoder<'a, 'metadata> { /* private fields */ }

Implementations

impl<'metadata> ArgumentsMetadataDecoder<'_, 'metadata>

pub fn without_auto_drain(self) -> ManuallyDrop<Self>

Get a wrapped value that does not automatically drain the metadata on drop.

The default behavior is to automatically drain the metadata on drop such that contract/trait or method metadata decoding progresses successfully, even when the caller doesn’t care about arguments. This, however, generates more code and causes difficulties for LLVM when it tries to optimize the code and especially when trying to prove the lack of panics. Usually this method is not needed, but if you are having difficulties with no-panic and either decoding a single method or drain arguments explicitly, you can use this helper method to work around compiler limitations.

pub fn remaining_metadata_bytes(&self) -> usize

The number of bytes left in the metadata that were not processed yet

pub fn decode_next<'a>( &'a mut self, ) -> Option<Result<ArgumentMetadataItem<'metadata>, MetadataDecodingError<'metadata>>>

Decode the next argument, returning None after MethodMetadataItem::num_arguments items, errors included.

Arguments are returned in the order that #[contract] generates them in, which ContractMetadataKind::Init describes. An argument out of that order is rejected with MetadataDecodingError::ArgumentOutOfOrder.

Trait Implementations

impl<'a, 'metadata> Debug for ArgumentsMetadataDecoder<'a, 'metadata>

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

Formats the value using the given formatter.

impl Drop for ArgumentsMetadataDecoder<'_, '_>

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

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

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.