Struct tinyjson::JsonGenerator

pub struct JsonGenerator<'indent, W: Write> { /* private fields */ }

JSON serializer for JsonValue.

Basically you don’t need to use this struct directly since JsonValue::stringify or JsonValue::format methods are using this internally.

use tinyjson::{JsonGenerator, JsonValue};

let v = JsonValue::from("hello, world".to_string());
let mut buf = vec![];
let mut gen = JsonGenerator::new(&mut buf);
gen.generate(&v).unwrap();

assert_eq!(String::from_utf8(buf).unwrap(), "\"hello, world\"");

Implementations

impl<'indent, W: Write> JsonGenerator<'indent, W>

pub fn new(out: W) -> Self

Create a new JsonGenerator object. The serialized byte sequence will be written to the given io::Write object.

pub fn indent(self, indent: &'indent str) -> Self

Set indent string. This will be used by JsonGenerator::generate.

use tinyjson::{JsonGenerator, JsonValue};

let v = JsonValue::from(vec![1.0.into(), 2.0.into(), 3.0.into()]);
let mut buf = vec![];
let mut gen = JsonGenerator::new(&mut buf).indent("        ");
gen.generate(&v).unwrap();

assert_eq!(String::from_utf8(buf).unwrap(),
"[
        1,
        2,
        3
]");

pub fn generate(&mut self, value: &JsonValue) -> Result<()>

Serialize the JsonValue into UTF-8 byte sequence. The result will be written to the io::Write object passed at JsonGenerator::new. This method serializes the value without indentation by default. But after setting an indent string via JsonGenerator::indent, this method will use the indent for elements of array and object.

use tinyjson::{JsonGenerator, JsonValue};

let v = JsonValue::from(vec![1.0.into(), 2.0.into(), 3.0.into()]);

let mut buf = vec![];
let mut gen = JsonGenerator::new(&mut buf);
gen.generate(&v).unwrap();
assert_eq!(String::from_utf8(buf).unwrap(), "[1,2,3]");

let mut buf = vec![];
let mut gen = JsonGenerator::new(&mut buf).indent("  "); // with 2-spaces indent
gen.generate(&v).unwrap();

assert_eq!(String::from_utf8(buf).unwrap(),
"[
  1,
  2,
  3
]");