Struct fixed_width::Serializer

pub struct Serializer<'w, W: 'w + Write> { /* fields omitted */ }

A serializer for fixed width data. Writes to the given Writer using the provided field definitions to determine how to serialize data into records.

Methods

impl<'w, W: 'w + Write> Serializer<'w, W>

pub fn new(wrtr: &'w mut W, fields: Vec<Field>) -> Self

Creates a new Serializer from a Writer and a set of field definitions.

Example

extern crate serde;
extern crate fixed_width;

use fixed_width::{Field, Serializer, Writer};
use serde::Serialize;

let fields = vec![
    Field::default().range(0..4).name(Some("letters")),
    Field::default().range(4..8).name(Some("numbers")),
];

let mut writer = Writer::from_memory();
let mut record = vec!["abcd", "1234"];

{
    let mut ser = Serializer::new(&mut writer, fields);
    record.serialize(&mut ser);
}

let s: String = writer.into();
assert_eq!("abcd1234", s);

Trait Implementations

impl<'a, 'w, W: Write> Serializer for &'a mut Serializer<'w, W>

type Ok = ()

The output type produced by this Serializer during successful serialization. Most serializers that produce text or binary output should set Ok = () and serialize into an [io::Write] or buffer contained within the Serializer instance. Serializers that build in-memory data structures may be simplified by using Ok to propagate the data structure around.

type Error = Error

The error type when some error occurs during serialization.

type SerializeSeq = Self

Type returned from [serialize_seq] for serializing the content of the sequence.

type SerializeTuple = Self

Type returned from [serialize_tuple] for serializing the content of the tuple.

type SerializeTupleStruct = Self

Type returned from [serialize_tuple_struct] for serializing the content of the tuple struct.

type SerializeTupleVariant = Self

Type returned from [serialize_tuple_variant] for serializing the content of the tuple variant.

type SerializeMap = Self

Type returned from [serialize_map] for serializing the content of the map.

type SerializeStruct = Self

Type returned from [serialize_struct] for serializing the content of the struct.

type SerializeStructVariant = Self

Type returned from [serialize_struct_variant] for serializing the content of the struct variant.

fn serialize_u8(self, val: u8) -> Result<Self::Ok>

Serialize a u8 value.

fn serialize_i8(self, val: i8) -> Result<Self::Ok>

Serialize an i8 value.

fn serialize_u16(self, val: u16) -> Result<Self::Ok>

Serialize a u16 value.

fn serialize_i16(self, val: i16) -> Result<Self::Ok>

Serialize an i16 value.

fn serialize_u32(self, val: u32) -> Result<Self::Ok>

Serialize a u32 value.

fn serialize_i32(self, val: i32) -> Result<Self::Ok>

Serialize an i32 value.

fn serialize_u64(self, val: u64) -> Result<Self::Ok>

Serialize a u64 value.

fn serialize_i64(self, val: i64) -> Result<Self::Ok>

Serialize an i64 value.

fn serialize_f32(self, val: f32) -> Result<Self::Ok>

Serialize an f32 value.

fn serialize_f64(self, val: f64) -> Result<Self::Ok>

Serialize an f64 value.

fn serialize_char(self, val: char) -> Result<Self::Ok>

Serialize a character.

fn serialize_bool(self, val: bool) -> Result<Self::Ok>

Serialize a bool value.

fn serialize_str(self, val: &str) -> Result<Self::Ok>

Serialize a &str.

fn serialize_bytes(self, val: &[u8]) -> Result<Self::Ok>

Serialize a chunk of raw byte data.

fn serialize_none(self) -> Result<Self::Ok>

Serialize a [None] value.

fn serialize_some<T: ?Sized + Serialize>(self, val: &T) -> Result<Self::Ok>

Serialize a [Some(T)] value.

fn serialize_unit(self) -> Result<Self::Ok>

Serialize a () value.

fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok>

Serialize a unit struct like struct Unit or PhantomData<T>.

fn serialize_unit_variant(
    self,
    _name: &'static str,
    _variant_index: u32,
    variant: &'static str
) -> Result<Self::Ok>

Serialize a unit variant like E::A in enum E { A, B }.

fn serialize_newtype_struct<T: ?Sized + Serialize>(
    self,
    _name: &'static str,
    val: &T
) -> Result<Self::Ok>

Serialize a newtype struct like struct Millimeters(u8).

fn serialize_newtype_variant<T: ?Sized + Serialize>(
    self,
    _name: &'static str,
    _variant_index: u32,
    _variant: &'static str,
    val: &T
) -> Result<Self::Ok>

Serialize a newtype variant like E::N in enum E { N(u8) }.

fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq>

Begin to serialize a variably sized sequence. This call must be followed by zero or more calls to serialize_element, then a call to end.

fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple>

Begin to serialize a statically sized sequence whose length will be known at deserialization time without looking at the serialized data. This call must be followed by zero or more calls to serialize_element, then a call to end.

fn serialize_tuple_struct(
    self,
    _name: &'static str,
    len: usize
) -> Result<Self::SerializeTupleStruct>

Begin to serialize a tuple struct like struct Rgb(u8, u8, u8). This call must be followed by zero or more calls to serialize_field, then a call to end.

fn serialize_tuple_variant(
    self,
    _name: &'static str,
    _variant_index: u32,
    variant: &'static str,
    _len: usize
) -> Result<Self::SerializeTupleVariant>

Begin to serialize a tuple variant like E::T in enum E { T(u8, u8) }. This call must be followed by zero or more calls to serialize_field, then a call to end.

fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap>

Begin to serialize a map. This call must be followed by zero or more calls to serialize_key and serialize_value, then a call to end.

fn serialize_struct(
    self,
    _name: &'static str,
    _len: usize
) -> Result<Self::SerializeStruct>

Begin to serialize a struct like struct Rgb { r: u8, g: u8, b: u8 }. This call must be followed by zero or more calls to serialize_field, then a call to end.

fn serialize_struct_variant(
    self,
    _name: &'static str,
    _variant_index: u32,
    variant: &'static str,
    _len: usize
) -> Result<Self::SerializeStructVariant>

Begin to serialize a struct variant like E::S in enum E { S { r: u8, g: u8, b: u8 } }. This call must be followed by zero or more calls to serialize_field, then a call to end.

fn serialize_i128(self, v: i128) -> Result<Self::Ok, Self::Error>

Serialize an i128 value.

fn serialize_u128(self, v: u128) -> Result<Self::Ok, Self::Error>

Serialize a u128 value.

fn collect_seq<I>(self, iter: I) -> Result<Self::Ok, Self::Error> where
    I: IntoIterator,
    <I as IntoIterator>::Item: Serialize, 

Collect an iterator as a sequence.

fn collect_map<K, V, I>(self, iter: I) -> Result<Self::Ok, Self::Error> where
    I: IntoIterator<Item = (K, V)>,
    K: Serialize,
    V: Serialize, 

Collect an iterator as a map.

fn collect_str<T>(self, value: &T) -> Result<Self::Ok, Self::Error> where
    T: Display + ?Sized, 

Serialize a string produced by an implementation of Display.

fn is_human_readable(&self) -> bool

Determine whether Serialize implementations should serialize in human-readable form.

impl<'a, 'w, W: Write> SerializeTuple for &'a mut Serializer<'w, W>

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_element<T: ?Sized + Serialize>(&mut self, value: &T) -> Result<()>

Serialize a tuple element.

fn end(self) -> Result<()>

Finish serializing a tuple.

impl<'a, 'w, W: Write> SerializeTupleStruct for &'a mut Serializer<'w, W>

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_field<T: ?Sized + Serialize>(&mut self, value: &T) -> Result<()>

Serialize a tuple struct field.

fn end(self) -> Result<()>

Finish serializing a tuple struct.

impl<'a, 'w, W: Write> SerializeSeq for &'a mut Serializer<'w, W>

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_element<T: ?Sized + Serialize>(&mut self, value: &T) -> Result<()>

Serialize a sequence element.

fn end(self) -> Result<()>

Finish serializing a sequence.

impl<'a, 'w, W: Write> SerializeTupleVariant for &'a mut Serializer<'w, W>

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_field<T: ?Sized + Serialize>(&mut self, value: &T) -> Result<()>

Serialize a tuple variant field.

fn end(self) -> Result<()>

Finish serializing a tuple variant.

impl<'a, 'w, W: Write> SerializeStruct for &'a mut Serializer<'w, W>

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_field<T: ?Sized + Serialize>(
    &mut self,
    _key: &'static str,
    value: &T
) -> Result<()>

Serialize a struct field.

fn end(self) -> Result<()>

Finish serializing a struct.

fn skip_field(&mut self, key: &'static str) -> Result<(), Self::Error>

Indicate that a struct field has been skipped.

impl<'a, 'w, W: Write> SerializeMap for &'a mut Serializer<'w, W>

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_key<T: ?Sized + Serialize>(&mut self, _key: &T) -> Result<()>

Serialize a map key.

fn serialize_value<T: ?Sized + Serialize>(&mut self, _value: &T) -> Result<()>

Serialize a map value.

fn end(self) -> Result<()>

Finish serializing a map.

fn serialize_entry<K, V>(
    &mut self,
    key: &K,
    value: &V
) -> Result<(), Self::Error> where
    K: Serialize + ?Sized,
    V: Serialize + ?Sized, 

Serialize a map entry consisting of a key and a value.

impl<'a, 'w, W: Write> SerializeStructVariant for &'a mut Serializer<'w, W>

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_field<T: ?Sized + Serialize>(
    &mut self,
    _key: &'static str,
    value: &T
) -> Result<()>

Serialize a struct variant field.

fn end(self) -> Result<()>

Finish serializing a struct variant.

fn skip_field(&mut self, key: &'static str) -> Result<(), Self::Error>

Indicate that a struct variant field has been skipped.