Trait agnes::source::csv::IntoCsvSrcSchema

pub trait IntoCsvSrcSchema {
    type CsvSrcSchema;
    fn into_csv_src_schema(
        self, 
        headers: &HashMap<String, usize>, 
        num_fields: usize
    ) -> Result<Self::CsvSrcSchema>;
}

A trait for converting an object into a CsvSrcSchemaCons.

Associated Types

type CsvSrcSchema

Resultant CsvSrcSchemaCons object.

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Required methods

fn into_csv_src_schema(
    self,
    headers: &HashMap<String, usize>,
    num_fields: usize
) -> Result<Self::CsvSrcSchema>

Convert this into a CsvSrcSchemaCons cons-list. headers is a map of column header names to column indices. num_fields is the number of columns in the CSV file (for checking for indexing errors).

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Implementors

impl IntoCsvSrcSchema for Nil

type CsvSrcSchema = Nil

fn into_csv_src_schema(
    self,
    _headers: &HashMap<String, usize>,
    _num_fields: usize
) -> Result<Nil>

impl<Label, DType, Tail> IntoCsvSrcSchema for SchemaCons<Label, DType, Tail> where
    Tail: IntoCsvSrcSchema, 

type CsvSrcSchema = CsvSrcSchemaCons<Label, DType, Tail::CsvSrcSchema>

fn into_csv_src_schema(
    self,
    headers: &HashMap<String, usize>,
    num_fields: usize
) -> Result<CsvSrcSchemaCons<Label, DType, Tail::CsvSrcSchema>>

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