Trait mule::Typer[−][src]

pub trait Typer: Default + 'static {
    type TypeTag: Display + Hash + Eq + Copy;
    type TypedValue: Debug + Clone;
    type TypedColumn;

    const TYPES: &'static [Self::TypeTag];

    fn type_value_as(
        &self, 
        value: &RawValue, 
        tag: Self::TypeTag
    ) -> ColumnValue<Self::TypedValue>;

    fn tag_type(&self, value: &Self::TypedValue) -> Self::TypeTag;

    fn type_column(
        &self, 
        tag: Self::TypeTag, 
        values: Vec<ColumnValue<Self::TypedValue>>
    ) -> Self::TypedColumn;

    fn type_value(&self, value: &RawValue) -> ColumnValue<Self::TypedValue> { ... }
}

Infers the type of a raw value

Associated Types

type TypeTag: Display + Hash + Eq + Copy[src]

Uniquely-identifying tag type for typed values

type TypedValue: Debug + Clone[src]

The type of a fully-typed single value

type TypedColumn[src]

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Associated Constants

const TYPES: &'static [Self::TypeTag][src]

The tags of supported types ordered by parsing priority. The earlier type tags will be attempted first.

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Required methods

fn type_value_as(
    &self,
    value: &RawValue,
    tag: Self::TypeTag
) -> ColumnValue<Self::TypedValue>[src]

Parse a raw value into a specific type.

fn tag_type(&self, value: &Self::TypedValue) -> Self::TypeTag[src]

Determine a tag value that identifies the type of the value

fn type_column(
    &self,
    tag: Self::TypeTag,
    values: Vec<ColumnValue<Self::TypedValue>>
) -> Self::TypedColumn[src]

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Provided methods

fn type_value(&self, value: &RawValue) -> ColumnValue<Self::TypedValue>[src]

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Implementors

impl Typer for DefaultTyper[src]

type TypeTag = ValueType

type TypedValue = Value

type TypedColumn = Column

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