897 lines
51 KiB
HTML
897 lines
51 KiB
HTML
<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `/Users/sambuc/.cargo/registry/src/github.com-1ecc6299db9ec823/serde_json-1.0.50/src/lib.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>lib.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../serde_json/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span>
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<span id="421">421</span>
|
||
<span id="422">422</span>
|
||
<span id="423">423</span>
|
||
<span id="424">424</span>
|
||
<span id="425">425</span>
|
||
<span id="426">426</span>
|
||
<span id="427">427</span>
|
||
<span id="428">428</span>
|
||
<span id="429">429</span>
|
||
<span id="430">430</span>
|
||
<span id="431">431</span>
|
||
<span id="432">432</span>
|
||
<span id="433">433</span>
|
||
<span id="434">434</span>
|
||
<span id="435">435</span>
|
||
<span id="436">436</span>
|
||
<span id="437">437</span>
|
||
<span id="438">438</span>
|
||
<span id="439">439</span>
|
||
<span id="440">440</span>
|
||
<span id="441">441</span>
|
||
<span id="442">442</span>
|
||
<span id="443">443</span>
|
||
<span id="444">444</span>
|
||
<span id="445">445</span>
|
||
<span id="446">446</span>
|
||
<span id="447">447</span>
|
||
</pre><div class="example-wrap"><pre class="rust ">
|
||
<span class="doccomment">//! # Serde JSON</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! JSON is a ubiquitous open-standard format that uses human-readable text to</span>
|
||
<span class="doccomment">//! transmit data objects consisting of key-value pairs.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! ```json</span>
|
||
<span class="doccomment">//! {</span>
|
||
<span class="doccomment">//! "name": "John Doe",</span>
|
||
<span class="doccomment">//! "age": 43,</span>
|
||
<span class="doccomment">//! "address": {</span>
|
||
<span class="doccomment">//! "street": "10 Downing Street",</span>
|
||
<span class="doccomment">//! "city": "London"</span>
|
||
<span class="doccomment">//! },</span>
|
||
<span class="doccomment">//! "phones": [</span>
|
||
<span class="doccomment">//! "+44 1234567",</span>
|
||
<span class="doccomment">//! "+44 2345678"</span>
|
||
<span class="doccomment">//! ]</span>
|
||
<span class="doccomment">//! }</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! There are three common ways that you might find yourself needing to work</span>
|
||
<span class="doccomment">//! with JSON data in Rust.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! - **As text data.** An unprocessed string of JSON data that you receive on</span>
|
||
<span class="doccomment">//! an HTTP endpoint, read from a file, or prepare to send to a remote</span>
|
||
<span class="doccomment">//! server.</span>
|
||
<span class="doccomment">//! - **As an untyped or loosely typed representation.** Maybe you want to</span>
|
||
<span class="doccomment">//! check that some JSON data is valid before passing it on, but without</span>
|
||
<span class="doccomment">//! knowing the structure of what it contains. Or you want to do very basic</span>
|
||
<span class="doccomment">//! manipulations like insert a key in a particular spot.</span>
|
||
<span class="doccomment">//! - **As a strongly typed Rust data structure.** When you expect all or most</span>
|
||
<span class="doccomment">//! of your data to conform to a particular structure and want to get real</span>
|
||
<span class="doccomment">//! work done without JSON's loosey-goosey nature tripping you up.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! Serde JSON provides efficient, flexible, safe ways of converting data</span>
|
||
<span class="doccomment">//! between each of these representations.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! # Operating on untyped JSON values</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! Any valid JSON data can be manipulated in the following recursive enum</span>
|
||
<span class="doccomment">//! representation. This data structure is [`serde_json::Value`][value].</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//! # use serde_json::{Number, Map};</span>
|
||
<span class="doccomment">//! #</span>
|
||
<span class="doccomment">//! # #[allow(dead_code)]</span>
|
||
<span class="doccomment">//! enum Value {</span>
|
||
<span class="doccomment">//! Null,</span>
|
||
<span class="doccomment">//! Bool(bool),</span>
|
||
<span class="doccomment">//! Number(Number),</span>
|
||
<span class="doccomment">//! String(String),</span>
|
||
<span class="doccomment">//! Array(Vec<Value>),</span>
|
||
<span class="doccomment">//! Object(Map<String, Value>),</span>
|
||
<span class="doccomment">//! }</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! A string of JSON data can be parsed into a `serde_json::Value` by the</span>
|
||
<span class="doccomment">//! [`serde_json::from_str`][from_str] function. There is also</span>
|
||
<span class="doccomment">//! [`from_slice`][from_slice] for parsing from a byte slice &[u8] and</span>
|
||
<span class="doccomment">//! [`from_reader`][from_reader] for parsing from any `io::Read` like a File or</span>
|
||
<span class="doccomment">//! a TCP stream.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//! use serde_json::{Result, Value};</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! fn untyped_example() -> Result<()> {</span>
|
||
<span class="doccomment">//! // Some JSON input data as a &str. Maybe this comes from the user.</span>
|
||
<span class="doccomment">//! let data = r#"</span>
|
||
<span class="doccomment">//! {</span>
|
||
<span class="doccomment">//! "name": "John Doe",</span>
|
||
<span class="doccomment">//! "age": 43,</span>
|
||
<span class="doccomment">//! "phones": [</span>
|
||
<span class="doccomment">//! "+44 1234567",</span>
|
||
<span class="doccomment">//! "+44 2345678"</span>
|
||
<span class="doccomment">//! ]</span>
|
||
<span class="doccomment">//! }"#;</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! // Parse the string of data into serde_json::Value.</span>
|
||
<span class="doccomment">//! let v: Value = serde_json::from_str(data)?;</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! // Access parts of the data by indexing with square brackets.</span>
|
||
<span class="doccomment">//! println!("Please call {} at the number {}", v["name"], v["phones"][0]);</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! Ok(())</span>
|
||
<span class="doccomment">//! }</span>
|
||
<span class="doccomment">//! #</span>
|
||
<span class="doccomment">//! # fn main() {</span>
|
||
<span class="doccomment">//! # untyped_example().unwrap();</span>
|
||
<span class="doccomment">//! # }</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! The result of square bracket indexing like `v["name"]` is a borrow of the</span>
|
||
<span class="doccomment">//! data at that index, so the type is `&Value`. A JSON map can be indexed with</span>
|
||
<span class="doccomment">//! string keys, while a JSON array can be indexed with integer keys. If the</span>
|
||
<span class="doccomment">//! type of the data is not right for the type with which it is being indexed,</span>
|
||
<span class="doccomment">//! or if a map does not contain the key being indexed, or if the index into a</span>
|
||
<span class="doccomment">//! vector is out of bounds, the returned element is `Value::Null`.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! When a `Value` is printed, it is printed as a JSON string. So in the code</span>
|
||
<span class="doccomment">//! above, the output looks like `Please call "John Doe" at the number "+44</span>
|
||
<span class="doccomment">//! 1234567"`. The quotation marks appear because `v["name"]` is a `&Value`</span>
|
||
<span class="doccomment">//! containing a JSON string and its JSON representation is `"John Doe"`.</span>
|
||
<span class="doccomment">//! Printing as a plain string without quotation marks involves converting from</span>
|
||
<span class="doccomment">//! a JSON string to a Rust string with [`as_str()`] or avoiding the use of</span>
|
||
<span class="doccomment">//! `Value` as described in the following section.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! [`as_str()`]: https://docs.serde.rs/serde_json/enum.Value.html#method.as_str</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! The `Value` representation is sufficient for very basic tasks but can be</span>
|
||
<span class="doccomment">//! tedious to work with for anything more significant. Error handling is</span>
|
||
<span class="doccomment">//! verbose to implement correctly, for example imagine trying to detect the</span>
|
||
<span class="doccomment">//! presence of unrecognized fields in the input data. The compiler is powerless</span>
|
||
<span class="doccomment">//! to help you when you make a mistake, for example imagine typoing `v["name"]`</span>
|
||
<span class="doccomment">//! as `v["nmae"]` in one of the dozens of places it is used in your code.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! # Parsing JSON as strongly typed data structures</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! Serde provides a powerful way of mapping JSON data into Rust data structures</span>
|
||
<span class="doccomment">//! largely automatically.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//! use serde::{Deserialize, Serialize};</span>
|
||
<span class="doccomment">//! use serde_json::Result;</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! #[derive(Serialize, Deserialize)]</span>
|
||
<span class="doccomment">//! struct Person {</span>
|
||
<span class="doccomment">//! name: String,</span>
|
||
<span class="doccomment">//! age: u8,</span>
|
||
<span class="doccomment">//! phones: Vec<String>,</span>
|
||
<span class="doccomment">//! }</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! fn typed_example() -> Result<()> {</span>
|
||
<span class="doccomment">//! // Some JSON input data as a &str. Maybe this comes from the user.</span>
|
||
<span class="doccomment">//! let data = r#"</span>
|
||
<span class="doccomment">//! {</span>
|
||
<span class="doccomment">//! "name": "John Doe",</span>
|
||
<span class="doccomment">//! "age": 43,</span>
|
||
<span class="doccomment">//! "phones": [</span>
|
||
<span class="doccomment">//! "+44 1234567",</span>
|
||
<span class="doccomment">//! "+44 2345678"</span>
|
||
<span class="doccomment">//! ]</span>
|
||
<span class="doccomment">//! }"#;</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! // Parse the string of data into a Person object. This is exactly the</span>
|
||
<span class="doccomment">//! // same function as the one that produced serde_json::Value above, but</span>
|
||
<span class="doccomment">//! // now we are asking it for a Person as output.</span>
|
||
<span class="doccomment">//! let p: Person = serde_json::from_str(data)?;</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! // Do things just like with any other Rust data structure.</span>
|
||
<span class="doccomment">//! println!("Please call {} at the number {}", p.name, p.phones[0]);</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! Ok(())</span>
|
||
<span class="doccomment">//! }</span>
|
||
<span class="doccomment">//! #</span>
|
||
<span class="doccomment">//! # fn main() {</span>
|
||
<span class="doccomment">//! # typed_example().unwrap();</span>
|
||
<span class="doccomment">//! # }</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! This is the same `serde_json::from_str` function as before, but this time we</span>
|
||
<span class="doccomment">//! assign the return value to a variable of type `Person` so Serde will</span>
|
||
<span class="doccomment">//! automatically interpret the input data as a `Person` and produce informative</span>
|
||
<span class="doccomment">//! error messages if the layout does not conform to what a `Person` is expected</span>
|
||
<span class="doccomment">//! to look like.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! Any type that implements Serde's `Deserialize` trait can be deserialized</span>
|
||
<span class="doccomment">//! this way. This includes built-in Rust standard library types like `Vec<T>`</span>
|
||
<span class="doccomment">//! and `HashMap<K, V>`, as well as any structs or enums annotated with</span>
|
||
<span class="doccomment">//! `#[derive(Deserialize)]`.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! Once we have `p` of type `Person`, our IDE and the Rust compiler can help us</span>
|
||
<span class="doccomment">//! use it correctly like they do for any other Rust code. The IDE can</span>
|
||
<span class="doccomment">//! autocomplete field names to prevent typos, which was impossible in the</span>
|
||
<span class="doccomment">//! `serde_json::Value` representation. And the Rust compiler can check that</span>
|
||
<span class="doccomment">//! when we write `p.phones[0]`, then `p.phones` is guaranteed to be a</span>
|
||
<span class="doccomment">//! `Vec<String>` so indexing into it makes sense and produces a `String`.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! # Constructing JSON values</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! Serde JSON provides a [`json!` macro][macro] to build `serde_json::Value`</span>
|
||
<span class="doccomment">//! objects with very natural JSON syntax.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//! use serde_json::json;</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! fn main() {</span>
|
||
<span class="doccomment">//! // The type of `john` is `serde_json::Value`</span>
|
||
<span class="doccomment">//! let john = json!({</span>
|
||
<span class="doccomment">//! "name": "John Doe",</span>
|
||
<span class="doccomment">//! "age": 43,</span>
|
||
<span class="doccomment">//! "phones": [</span>
|
||
<span class="doccomment">//! "+44 1234567",</span>
|
||
<span class="doccomment">//! "+44 2345678"</span>
|
||
<span class="doccomment">//! ]</span>
|
||
<span class="doccomment">//! });</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! println!("first phone number: {}", john["phones"][0]);</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! // Convert to a string of JSON and print it out</span>
|
||
<span class="doccomment">//! println!("{}", john.to_string());</span>
|
||
<span class="doccomment">//! }</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! The `Value::to_string()` function converts a `serde_json::Value` into a</span>
|
||
<span class="doccomment">//! `String` of JSON text.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! One neat thing about the `json!` macro is that variables and expressions can</span>
|
||
<span class="doccomment">//! be interpolated directly into the JSON value as you are building it. Serde</span>
|
||
<span class="doccomment">//! will check at compile time that the value you are interpolating is able to</span>
|
||
<span class="doccomment">//! be represented as JSON.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//! # use serde_json::json;</span>
|
||
<span class="doccomment">//! #</span>
|
||
<span class="doccomment">//! # fn random_phone() -> u16 { 0 }</span>
|
||
<span class="doccomment">//! #</span>
|
||
<span class="doccomment">//! let full_name = "John Doe";</span>
|
||
<span class="doccomment">//! let age_last_year = 42;</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! // The type of `john` is `serde_json::Value`</span>
|
||
<span class="doccomment">//! let john = json!({</span>
|
||
<span class="doccomment">//! "name": full_name,</span>
|
||
<span class="doccomment">//! "age": age_last_year + 1,</span>
|
||
<span class="doccomment">//! "phones": [</span>
|
||
<span class="doccomment">//! format!("+44 {}", random_phone())</span>
|
||
<span class="doccomment">//! ]</span>
|
||
<span class="doccomment">//! });</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! This is amazingly convenient but we have the problem we had before with</span>
|
||
<span class="doccomment">//! `Value` which is that the IDE and Rust compiler cannot help us if we get it</span>
|
||
<span class="doccomment">//! wrong. Serde JSON provides a better way of serializing strongly-typed data</span>
|
||
<span class="doccomment">//! structures into JSON text.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! # Creating JSON by serializing data structures</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! A data structure can be converted to a JSON string by</span>
|
||
<span class="doccomment">//! [`serde_json::to_string`][to_string]. There is also</span>
|
||
<span class="doccomment">//! [`serde_json::to_vec`][to_vec] which serializes to a `Vec<u8>` and</span>
|
||
<span class="doccomment">//! [`serde_json::to_writer`][to_writer] which serializes to any `io::Write`</span>
|
||
<span class="doccomment">//! such as a File or a TCP stream.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//! use serde::{Deserialize, Serialize};</span>
|
||
<span class="doccomment">//! use serde_json::Result;</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! #[derive(Serialize, Deserialize)]</span>
|
||
<span class="doccomment">//! struct Address {</span>
|
||
<span class="doccomment">//! street: String,</span>
|
||
<span class="doccomment">//! city: String,</span>
|
||
<span class="doccomment">//! }</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! fn print_an_address() -> Result<()> {</span>
|
||
<span class="doccomment">//! // Some data structure.</span>
|
||
<span class="doccomment">//! let address = Address {</span>
|
||
<span class="doccomment">//! street: "10 Downing Street".to_owned(),</span>
|
||
<span class="doccomment">//! city: "London".to_owned(),</span>
|
||
<span class="doccomment">//! };</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! // Serialize it to a JSON string.</span>
|
||
<span class="doccomment">//! let j = serde_json::to_string(&address)?;</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! // Print, write to a file, or send to an HTTP server.</span>
|
||
<span class="doccomment">//! println!("{}", j);</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! Ok(())</span>
|
||
<span class="doccomment">//! }</span>
|
||
<span class="doccomment">//! #</span>
|
||
<span class="doccomment">//! # fn main() {</span>
|
||
<span class="doccomment">//! # print_an_address().unwrap();</span>
|
||
<span class="doccomment">//! # }</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! Any type that implements Serde's `Serialize` trait can be serialized this</span>
|
||
<span class="doccomment">//! way. This includes built-in Rust standard library types like `Vec<T>` and</span>
|
||
<span class="doccomment">//! `HashMap<K, V>`, as well as any structs or enums annotated with</span>
|
||
<span class="doccomment">//! `#[derive(Serialize)]`.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! # No-std support</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! As long as there is a memory allocator, it is possible to use serde_json</span>
|
||
<span class="doccomment">//! without the rest of the Rust standard library. This is supported on Rust</span>
|
||
<span class="doccomment">//! 1.36+. Disable the default "std" feature and enable the "alloc" feature:</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! ```toml</span>
|
||
<span class="doccomment">//! [dependencies]</span>
|
||
<span class="doccomment">//! serde_json = { version = "1.0", default-features = false, features = ["alloc"] }</span>
|
||
<span class="doccomment">//! ```</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! For JSON support in Serde without a memory allocator, please see the</span>
|
||
<span class="doccomment">//! [`serde-json-core`] crate.</span>
|
||
<span class="doccomment">//!</span>
|
||
<span class="doccomment">//! [value]: https://docs.serde.rs/serde_json/value/enum.Value.html</span>
|
||
<span class="doccomment">//! [from_str]: https://docs.serde.rs/serde_json/de/fn.from_str.html</span>
|
||
<span class="doccomment">//! [from_slice]: https://docs.serde.rs/serde_json/de/fn.from_slice.html</span>
|
||
<span class="doccomment">//! [from_reader]: https://docs.serde.rs/serde_json/de/fn.from_reader.html</span>
|
||
<span class="doccomment">//! [to_string]: https://docs.serde.rs/serde_json/ser/fn.to_string.html</span>
|
||
<span class="doccomment">//! [to_vec]: https://docs.serde.rs/serde_json/ser/fn.to_vec.html</span>
|
||
<span class="doccomment">//! [to_writer]: https://docs.serde.rs/serde_json/ser/fn.to_writer.html</span>
|
||
<span class="doccomment">//! [macro]: https://docs.serde.rs/serde_json/macro.json.html</span>
|
||
<span class="doccomment">//! [`serde-json-core`]: https://japaric.github.io/serde-json-core/serde_json_core/</span>
|
||
|
||
<span class="attribute">#![<span class="ident">doc</span>(<span class="ident">html_root_url</span> <span class="op">=</span> <span class="string">"https://docs.rs/serde_json/1.0.50"</span>)]</span>
|
||
<span class="attribute">#![<span class="ident">deny</span>(<span class="ident">clippy</span>::<span class="ident">all</span>, <span class="ident">clippy</span>::<span class="ident">pedantic</span>)]</span>
|
||
<span class="comment">// Ignored clippy lints</span>
|
||
<span class="attribute">#![<span class="ident">allow</span>(
|
||
<span class="ident">clippy</span>::<span class="ident">deprecated_cfg_attr</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">doc_markdown</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">match_single_binding</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">needless_doctest_main</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">transmute_ptr_to_ptr</span>
|
||
)]</span>
|
||
<span class="comment">// Ignored clippy_pedantic lints</span>
|
||
<span class="attribute">#![<span class="ident">allow</span>(
|
||
<span class="comment">// Deserializer::from_str, into_iter</span>
|
||
<span class="ident">clippy</span>::<span class="ident">should_implement_trait</span>,
|
||
<span class="comment">// integer and float ser/de requires these sorts of casts</span>
|
||
<span class="ident">clippy</span>::<span class="ident">cast_possible_wrap</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">cast_precision_loss</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">cast_sign_loss</span>,
|
||
<span class="comment">// correctly used</span>
|
||
<span class="ident">clippy</span>::<span class="ident">enum_glob_use</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">integer_division</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">wildcard_imports</span>,
|
||
<span class="comment">// things are often more readable this way</span>
|
||
<span class="ident">clippy</span>::<span class="ident">cast_lossless</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">module_name_repetitions</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">shadow_unrelated</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">single_match_else</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">too_many_lines</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">use_self</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">zero_prefixed_literal</span>,
|
||
<span class="comment">// we support older compilers</span>
|
||
<span class="ident">clippy</span>::<span class="ident">checked_conversions</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">redundant_field_names</span>,
|
||
<span class="comment">// noisy</span>
|
||
<span class="ident">clippy</span>::<span class="ident">missing_errors_doc</span>,
|
||
<span class="ident">clippy</span>::<span class="ident">must_use_candidate</span>,
|
||
)]</span>
|
||
<span class="attribute">#![<span class="ident">deny</span>(<span class="ident">missing_docs</span>)]</span>
|
||
<span class="attribute">#![<span class="ident">cfg_attr</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>), <span class="ident">no_std</span>)]</span>
|
||
|
||
<span class="comment">////////////////////////////////////////////////////////////////////////////////</span>
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>))]</span>
|
||
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">alloc</span>;
|
||
|
||
<span class="doccomment">/// A facade around all the types we need from the `std`, `core`, and `alloc`</span>
|
||
<span class="doccomment">/// crates. This avoids elaborate import wrangling having to happen in every</span>
|
||
<span class="doccomment">/// module.</span>
|
||
<span class="kw">mod</span> <span class="ident">lib</span> {
|
||
<span class="kw">mod</span> <span class="ident">core</span> {
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>))]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">core</span>::<span class="kw-2">*</span>;
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">std</span>::<span class="kw-2">*</span>;
|
||
}
|
||
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">core</span>::<span class="ident">cell</span>::{<span class="ident">Cell</span>, <span class="ident">RefCell</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">core</span>::<span class="ident">clone</span>::{<span class="self">self</span>, <span class="ident">Clone</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">core</span>::<span class="ident">convert</span>::{<span class="self">self</span>, <span class="ident">From</span>, <span class="ident">Into</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">core</span>::<span class="ident">default</span>::{<span class="self">self</span>, <span class="ident">Default</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">core</span>::<span class="ident">fmt</span>::{<span class="self">self</span>, <span class="ident">Debug</span>, <span class="ident">Display</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">core</span>::<span class="ident">hash</span>::{<span class="self">self</span>, <span class="ident">Hash</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">core</span>::<span class="ident">marker</span>::{<span class="self">self</span>, <span class="ident">PhantomData</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">core</span>::<span class="ident">result</span>::{<span class="self">self</span>, <span class="prelude-ty">Result</span>};
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">core</span>::{<span class="ident">borrow</span>, <span class="ident">char</span>, <span class="ident">cmp</span>, <span class="ident">iter</span>, <span class="ident">mem</span>, <span class="ident">num</span>, <span class="ident">ops</span>, <span class="ident">slice</span>, <span class="ident">str</span>};
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>))]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">alloc</span>::<span class="ident">borrow</span>::{<span class="ident">Cow</span>, <span class="ident">ToOwned</span>};
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">borrow</span>::{<span class="ident">Cow</span>, <span class="ident">ToOwned</span>};
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>))]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">alloc</span>::<span class="ident">string</span>::{<span class="ident">String</span>, <span class="ident">ToString</span>};
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">string</span>::{<span class="ident">String</span>, <span class="ident">ToString</span>};
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>))]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">alloc</span>::<span class="ident">vec</span>::{<span class="self">self</span>, <span class="ident">Vec</span>};
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">vec</span>::{<span class="self">self</span>, <span class="ident">Vec</span>};
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>))]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">alloc</span>::<span class="ident">boxed</span>::<span class="ident">Box</span>;
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">boxed</span>::<span class="ident">Box</span>;
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>))]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">alloc</span>::<span class="ident">collections</span>::{<span class="ident">btree_map</span>, <span class="ident">BTreeMap</span>};
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::{<span class="ident">btree_map</span>, <span class="ident">BTreeMap</span>};
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">error</span>;
|
||
}
|
||
|
||
<span class="comment">////////////////////////////////////////////////////////////////////////////////</span>
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">inline</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">de</span>::<span class="ident">from_reader</span>;
|
||
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">inline</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">de</span>::{<span class="ident">from_slice</span>, <span class="ident">from_str</span>, <span class="ident">Deserializer</span>, <span class="ident">StreamDeserializer</span>};
|
||
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">inline</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">error</span>::{<span class="ident">Error</span>, <span class="prelude-ty">Result</span>};
|
||
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">inline</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">ser</span>::{<span class="ident">to_string</span>, <span class="ident">to_string_pretty</span>, <span class="ident">to_vec</span>, <span class="ident">to_vec_pretty</span>};
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">inline</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">ser</span>::{<span class="ident">to_writer</span>, <span class="ident">to_writer_pretty</span>, <span class="ident">Serializer</span>};
|
||
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">inline</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">value</span>::{<span class="ident">from_value</span>, <span class="ident">to_value</span>, <span class="ident">Map</span>, <span class="ident">Number</span>, <span class="ident">Value</span>};
|
||
|
||
<span class="comment">// We only use our own error type; no need for From conversions provided by the</span>
|
||
<span class="comment">// standard library's try! macro. This reduces lines of LLVM IR by 4%.</span>
|
||
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">tri</span> {
|
||
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>:<span class="ident">expr</span>) <span class="op">=</span><span class="op">></span> {
|
||
<span class="kw">match</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span> {
|
||
<span class="kw">crate</span>::<span class="ident">lib</span>::<span class="prelude-ty">Result</span>::<span class="prelude-val">Ok</span>(<span class="ident">val</span>) <span class="op">=</span><span class="op">></span> <span class="ident">val</span>,
|
||
<span class="kw">crate</span>::<span class="ident">lib</span>::<span class="prelude-ty">Result</span>::<span class="prelude-val">Err</span>(<span class="ident">err</span>) <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="kw">crate</span>::<span class="ident">lib</span>::<span class="prelude-ty">Result</span>::<span class="prelude-val">Err</span>(<span class="ident">err</span>),
|
||
}
|
||
};
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">macro_use</span>]</span>
|
||
<span class="kw">mod</span> <span class="ident">macros</span>;
|
||
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">de</span>;
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">error</span>;
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">map</span>;
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">ser</span>;
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>))]</span>
|
||
<span class="kw">mod</span> <span class="ident">ser</span>;
|
||
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">value</span>;
|
||
|
||
<span class="kw">mod</span> <span class="ident">features_check</span>;
|
||
|
||
<span class="kw">mod</span> <span class="ident">io</span>;
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
|
||
<span class="kw">mod</span> <span class="ident">iter</span>;
|
||
<span class="kw">mod</span> <span class="ident">number</span>;
|
||
<span class="kw">mod</span> <span class="ident">read</span>;
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"raw_value"</span>)]</span>
|
||
<span class="kw">mod</span> <span class="ident">raw</span>;
|
||
</pre></div>
|
||
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