Struct Encoder

pub struct Encoder<'a> { /* private fields */ }

A structure for implementing serialization to JSON.

Implementations

impl<'a> Encoder<'a>

pub fn new_pretty(writer: &'a mut dyn Write) -> Encoder<'a>

Creates a new encoder whose output will be written in human-readable JSON to the specified writer

pub fn new(writer: &'a mut dyn Write) -> Encoder<'a>

Creates a new encoder whose output will be written in compact JSON to the specified writer

pub fn set_indent(&mut self, new_indent: u32) -> Result<(), ()>

Set the number of spaces to indent for each level. This is safe to set during encoding.

Trait Implementations

impl<'a> Encoder for Encoder<'a>

type Error = EncoderError

The error type for method results.

fn emit_nil(&mut self) -> EncodeResult<()>

Emit a nil value.

fn emit_usize(&mut self, v: usize) -> EncodeResult<()>

Emit a usize value.

fn emit_u64(&mut self, v: u64) -> EncodeResult<()>

Emit a u64 value.

fn emit_u32(&mut self, v: u32) -> EncodeResult<()>

Emit a u32 value.

fn emit_u16(&mut self, v: u16) -> EncodeResult<()>

Emit a u16 value.

fn emit_u8(&mut self, v: u8) -> EncodeResult<()>

Emit a u8 value.

fn emit_isize(&mut self, v: isize) -> EncodeResult<()>

Emit a isize value.

fn emit_i64(&mut self, v: i64) -> EncodeResult<()>

Emit a i64 value.

fn emit_i32(&mut self, v: i32) -> EncodeResult<()>

Emit a i32 value.

fn emit_i16(&mut self, v: i16) -> EncodeResult<()>

Emit a i16 value.

fn emit_i8(&mut self, v: i8) -> EncodeResult<()>

Emit a i8 value.

fn emit_bool(&mut self, v: bool) -> EncodeResult<()>

Emit a bool value.

fn emit_f64(&mut self, v: f64) -> EncodeResult<()>

Emit a f64 value.

fn emit_f32(&mut self, v: f32) -> EncodeResult<()>

Emit a f32 value.

fn emit_char(&mut self, v: char) -> EncodeResult<()>

Emit a char value.

fn emit_str(&mut self, v: &str) -> EncodeResult<()>

Emit a string value.

fn emit_enum<F>(&mut self, _name: &str, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit an enumeration value.

fn emit_enum_variant<F>( &mut self, name: &str, _id: usize, cnt: usize, f: F, ) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit a enumeration variant value with no or unnamed data.

fn emit_enum_variant_arg<F>(&mut self, idx: usize, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit an unnamed data item for an enumeration variant.

fn emit_enum_struct_variant<F>( &mut self, name: &str, id: usize, cnt: usize, f: F, ) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit a enumeration variant value with no or named data.

fn emit_enum_struct_variant_field<F>( &mut self, _: &str, idx: usize, f: F, ) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit a named data item for an enumeration variant.

fn emit_struct<F>(&mut self, _: &str, len: usize, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit a struct value.

fn emit_struct_field<F>( &mut self, name: &str, idx: usize, f: F, ) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit a field item for a struct.

fn emit_tuple<F>(&mut self, len: usize, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit a tuple value.

fn emit_tuple_arg<F>(&mut self, idx: usize, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit a data item for a tuple.

fn emit_tuple_struct<F>( &mut self, _: &str, len: usize, f: F, ) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit a tuple struct value.

fn emit_tuple_struct_arg<F>(&mut self, idx: usize, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit a data item for a tuple struct.

fn emit_option<F>(&mut self, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit an optional value.

fn emit_option_none(&mut self) -> EncodeResult<()>

Emit the None optional value.

fn emit_option_some<F>(&mut self, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit the Some(x) optional value.

fn emit_seq<F>(&mut self, len: usize, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit a sequence of values.

fn emit_seq_elt<F>(&mut self, idx: usize, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit an element in a sequence.

fn emit_map<F>(&mut self, len: usize, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit an associative container (map).

fn emit_map_elt_key<F>(&mut self, idx: usize, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit the key for an entry in a map.

fn emit_map_elt_val<F>(&mut self, _idx: usize, f: F) -> EncodeResult<()>

where F: FnOnce(&mut Encoder<'a>) -> EncodeResult<()>,

Emit the value for an entry in a map.