Trait ReadAnswer 

pub trait ReadAnswer {
    type Output<'a>;

    // Required method
    fn read<'a>(
        id: &str,
        answer: &'a Answer,
    ) -> Result<Self::Output<'a>, AnswerError>;
}

How the answer behind a QuestionKey is read from a response.

Implemented for NoulAnswer, ChoiceAnswer, ScoreAnswer, Answer, TypedChoice and ValueChoice. Implement it for your own question types together with IntoQuestion.

Required Associated Types

type Output<'a>

What SystemOneResponse::answer returns for this key.

Required Methods

fn read<'a>( id: &str, answer: &'a Answer, ) -> Result<Self::Output<'a>, AnswerError>

Reads the answer to question id, failing when it has the wrong kind or content.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl ReadAnswer for Answer

type Output<'a> = &'a Answer

impl ReadAnswer for ChoiceAnswer

type Output<'a> = &'a ChoiceAnswer

impl ReadAnswer for NoulAnswer

type Output<'a> = NoulAnswer

impl ReadAnswer for ScoreAnswer

type Output<'a> = &'a ScoreAnswer

impl<T: ChoiceOptions> ReadAnswer for TypedChoice<T>

type Output<'a> = TypedChoice<T>

impl<T> ReadAnswer for ValueChoice<T>

where T: FromStr + Clone + PartialEq,

type Output<'a> = TypedChoice<T>