Struct ReaderBuilder

pub struct ReaderBuilder { /* private fields */ }

Builds a CSV reader with various configuration knobs.

This builder can be used to tweak the field delimiter, record terminator and more for parsing CSV. Once a CSV Reader is built, its configuration cannot be changed.

Implementations

impl ReaderBuilder

pub fn new() -> ReaderBuilder

Create a new builder.

pub fn build(&self) -> Reader

Build a CSV parser from this configuration.

pub fn delimiter(&mut self, delimiter: u8) -> &mut ReaderBuilder

The field delimiter to use when parsing CSV.

The default is b','.

pub fn terminator(&mut self, term: Terminator) -> &mut ReaderBuilder

The record terminator to use when parsing CSV.

A record terminator can be any single byte. The default is a special value, Terminator::CRLF, which treats any occurrence of \r, \n or \r\n as a single record terminator.

pub fn quote(&mut self, quote: u8) -> &mut ReaderBuilder

The quote character to use when parsing CSV.

The default is b'"'.

pub fn escape(&mut self, escape: Option<u8>) -> &mut ReaderBuilder

The escape character to use when parsing CSV.

In some variants of CSV, quotes are escaped using a special escape character like \ (instead of escaping quotes by doubling them).

By default, recognizing these idiosyncratic escapes is disabled.

pub fn double_quote(&mut self, yes: bool) -> &mut ReaderBuilder

Enable double quote escapes.

This is enabled by default, but it may be disabled. When disabled, doubled quotes are not interpreted as escapes.

pub fn quoting(&mut self, yes: bool) -> &mut ReaderBuilder

Enable or disable quoting.

This is enabled by default, but it may be disabled. When disabled, quotes are not treated specially.

pub fn comment(&mut self, comment: Option<u8>) -> &mut ReaderBuilder

The comment character to use when parsing CSV.

If the start of a record begins with the byte given here, then that line is ignored by the CSV parser.

This is disabled by default.

pub fn ascii(&mut self) -> &mut ReaderBuilder

A convenience method for specifying a configuration to read ASCII delimited text.

This sets the delimiter and record terminator to the ASCII unit separator (\x1F) and record separator (\x1E), respectively.

Trait Implementations

impl Debug for ReaderBuilder

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

Formats the value using the given formatter.

impl Default for ReaderBuilder

fn default() -> ReaderBuilder

Returns the “default value” for a type.