[−][src]Trait elrond_wasm::io::dyn_arg_input::DynArgInput

pub trait DynArgInput<I: TopDecodeInput>: SignalError + Sized {
    fn has_next(&self) -> bool;

    fn next_arg_input(&mut self) -> I;

    fn assert_no_more_args(&self) { ... }
}

Abstracts away the loading of multi-arguments. Acts as an abstract source for these arguments.

The main method, next_arg_input will provide a decode input, from which any deserializable object can be deserialized.

Structs implementing this trait are also responsible with error handling, such as:

  • deserialization errors
  • insufficient arguments
  • too many arguments For this reason it also requires the SignalError trait.

There are 2 main scenarios for it:

  • deserializing endpoint arguments directly from the API
  • deserializing callback arguments saved to storage, from a call data string

Required methods

fn has_next(&self) -> bool

Check if there are more arguments that can be loaded.

fn next_arg_input(&mut self) -> I

Retrieves an input for deserializing an argument. If the loader is out of arguments, it will crash by itself with an appropriate error, without returning. Use if the next argument is optional, use has_next beforehand.

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Provided methods

fn assert_no_more_args(&self)

Called after retrieving all arguments to validate that extra arguments were not provided.

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Implementors

impl<'a, SE> DynArgInput<Vec<u8>> for CallDataArgLoader<'a, SE> where
    SE: SignalError, [src]

impl<A, BigInt, BigUint> DynArgInput<ArgDecodeInput<A, BigInt, BigUint>> for EndpointDynArgLoader<A, BigInt, BigUint> where
    BigUint: BigUintApi + 'static,
    BigInt: BigIntApi<BigUint> + 'static,
    A: ContractIOApi<BigInt, BigUint> + 'static, [src]

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