| <!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 of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/serde_json-1.0.96/src/number.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>number.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../serde_json/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../serde_json/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| <span id="729">729</span> |
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| <span id="731">731</span> |
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| <span id="760">760</span> |
| <span id="761">761</span> |
| <span id="762">762</span> |
| <span id="763">763</span> |
| <span id="764">764</span> |
| <span id="765">765</span> |
| <span id="766">766</span> |
| <span id="767">767</span> |
| <span id="768">768</span> |
| <span id="769">769</span> |
| <span id="770">770</span> |
| <span id="771">771</span> |
| <span id="772">772</span> |
| <span id="773">773</span> |
| <span id="774">774</span> |
| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">crate</span>::de::ParserNumber; |
| <span class="kw">use </span><span class="kw">crate</span>::error::Error; |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::error::ErrorCode; |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">use </span>alloc::borrow::ToOwned; |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">use </span>alloc::string::{String, ToString}; |
| <span class="kw">use </span>core::fmt::{<span class="self">self</span>, Debug, Display}; |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">use </span>core::hash::{Hash, Hasher}; |
| <span class="kw">use </span>serde::de::{<span class="self">self</span>, Unexpected, Visitor}; |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">use </span>serde::de::{IntoDeserializer, MapAccess}; |
| <span class="kw">use </span>serde::{forward_to_deserialize_any, Deserialize, Deserializer, Serialize, Serializer}; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const </span>TOKEN: <span class="kw-2">&</span>str = <span class="string">"$serde_json::private::Number"</span>; |
| |
| <span class="doccomment">/// Represents a JSON number, whether integer or floating point. |
| </span><span class="attribute">#[derive(Clone, PartialEq, Eq, Hash)] |
| </span><span class="kw">pub struct </span>Number { |
| n: N, |
| } |
| |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| #[derive(Copy, Clone)] |
| </span><span class="kw">enum </span>N { |
| PosInt(u64), |
| <span class="doccomment">/// Always less than zero. |
| </span>NegInt(i64), |
| <span class="doccomment">/// Always finite. |
| </span>Float(f64), |
| } |
| |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">impl </span>PartialEq <span class="kw">for </span>N { |
| <span class="kw">fn </span>eq(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="self">Self</span>) -> bool { |
| <span class="kw">match </span>(<span class="self">self</span>, other) { |
| (N::PosInt(a), N::PosInt(b)) => a == b, |
| (N::NegInt(a), N::NegInt(b)) => a == b, |
| (N::Float(a), N::Float(b)) => a == b, |
| <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| } |
| } |
| } |
| |
| <span class="comment">// Implementing Eq is fine since any float values are always finite. |
| </span><span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">impl </span>Eq <span class="kw">for </span>N {} |
| |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">impl </span>Hash <span class="kw">for </span>N { |
| <span class="kw">fn </span>hash<H: Hasher>(<span class="kw-2">&</span><span class="self">self</span>, h: <span class="kw-2">&mut </span>H) { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| N::PosInt(i) => i.hash(h), |
| N::NegInt(i) => i.hash(h), |
| N::Float(f) => { |
| <span class="kw">if </span>f == <span class="number">0.0f64 </span>{ |
| <span class="comment">// There are 2 zero representations, +0 and -0, which |
| // compare equal but have different bits. We use the +0 hash |
| // for both so that hash(+0) == hash(-0). |
| </span><span class="number">0.0f64</span>.to_bits().hash(h); |
| } <span class="kw">else </span>{ |
| f.to_bits().hash(h); |
| } |
| } |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">type </span>N = String; |
| |
| <span class="kw">impl </span>Number { |
| <span class="doccomment">/// Returns true if the `Number` is an integer between `i64::MIN` and |
| /// `i64::MAX`. |
| /// |
| /// For any Number on which `is_i64` returns true, `as_i64` is guaranteed to |
| /// return the integer value. |
| /// |
| /// ``` |
| /// # use serde_json::json; |
| /// # |
| /// let big = i64::max_value() as u64 + 10; |
| /// let v = json!({ "a": 64, "b": big, "c": 256.0 }); |
| /// |
| /// assert!(v["a"].is_i64()); |
| /// |
| /// // Greater than i64::MAX. |
| /// assert!(!v["b"].is_i64()); |
| /// |
| /// // Numbers with a decimal point are not considered integers. |
| /// assert!(!v["c"].is_i64()); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_i64(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">match </span><span class="self">self</span>.n { |
| N::PosInt(v) => v <= i64::max_value() <span class="kw">as </span>u64, |
| N::NegInt(<span class="kw">_</span>) => <span class="bool-val">true</span>, |
| N::Float(<span class="kw">_</span>) => <span class="bool-val">false</span>, |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="self">self</span>.as_i64().is_some() |
| } |
| |
| <span class="doccomment">/// Returns true if the `Number` is an integer between zero and `u64::MAX`. |
| /// |
| /// For any Number on which `is_u64` returns true, `as_u64` is guaranteed to |
| /// return the integer value. |
| /// |
| /// ``` |
| /// # use serde_json::json; |
| /// # |
| /// let v = json!({ "a": 64, "b": -64, "c": 256.0 }); |
| /// |
| /// assert!(v["a"].is_u64()); |
| /// |
| /// // Negative integer. |
| /// assert!(!v["b"].is_u64()); |
| /// |
| /// // Numbers with a decimal point are not considered integers. |
| /// assert!(!v["c"].is_u64()); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_u64(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">match </span><span class="self">self</span>.n { |
| N::PosInt(<span class="kw">_</span>) => <span class="bool-val">true</span>, |
| N::NegInt(<span class="kw">_</span>) | N::Float(<span class="kw">_</span>) => <span class="bool-val">false</span>, |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="self">self</span>.as_u64().is_some() |
| } |
| |
| <span class="doccomment">/// Returns true if the `Number` can be represented by f64. |
| /// |
| /// For any Number on which `is_f64` returns true, `as_f64` is guaranteed to |
| /// return the floating point value. |
| /// |
| /// Currently this function returns true if and only if both `is_i64` and |
| /// `is_u64` return false but this is not a guarantee in the future. |
| /// |
| /// ``` |
| /// # use serde_json::json; |
| /// # |
| /// let v = json!({ "a": 256.0, "b": 64, "c": -64 }); |
| /// |
| /// assert!(v["a"].is_f64()); |
| /// |
| /// // Integers. |
| /// assert!(!v["b"].is_f64()); |
| /// assert!(!v["c"].is_f64()); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_f64(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">match </span><span class="self">self</span>.n { |
| N::Float(<span class="kw">_</span>) => <span class="bool-val">true</span>, |
| N::PosInt(<span class="kw">_</span>) | N::NegInt(<span class="kw">_</span>) => <span class="bool-val">false</span>, |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span>{ |
| <span class="kw">for </span>c <span class="kw">in </span><span class="self">self</span>.n.chars() { |
| <span class="kw">if </span>c == <span class="string">'.' </span>|| c == <span class="string">'e' </span>|| c == <span class="string">'E' </span>{ |
| <span class="kw">return </span><span class="self">self</span>.n.parse::<f64>().ok().map_or(<span class="bool-val">false</span>, f64::is_finite); |
| } |
| } |
| <span class="bool-val">false |
| </span>} |
| } |
| |
| <span class="doccomment">/// If the `Number` is an integer, represent it as i64 if possible. Returns |
| /// None otherwise. |
| /// |
| /// ``` |
| /// # use serde_json::json; |
| /// # |
| /// let big = i64::max_value() as u64 + 10; |
| /// let v = json!({ "a": 64, "b": big, "c": 256.0 }); |
| /// |
| /// assert_eq!(v["a"].as_i64(), Some(64)); |
| /// assert_eq!(v["b"].as_i64(), None); |
| /// assert_eq!(v["c"].as_i64(), None); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>as_i64(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><i64> { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">match </span><span class="self">self</span>.n { |
| N::PosInt(n) => { |
| <span class="kw">if </span>n <= i64::max_value() <span class="kw">as </span>u64 { |
| <span class="prelude-val">Some</span>(n <span class="kw">as </span>i64) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| N::NegInt(n) => <span class="prelude-val">Some</span>(n), |
| N::Float(<span class="kw">_</span>) => <span class="prelude-val">None</span>, |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="self">self</span>.n.parse().ok() |
| } |
| |
| <span class="doccomment">/// If the `Number` is an integer, represent it as u64 if possible. Returns |
| /// None otherwise. |
| /// |
| /// ``` |
| /// # use serde_json::json; |
| /// # |
| /// let v = json!({ "a": 64, "b": -64, "c": 256.0 }); |
| /// |
| /// assert_eq!(v["a"].as_u64(), Some(64)); |
| /// assert_eq!(v["b"].as_u64(), None); |
| /// assert_eq!(v["c"].as_u64(), None); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>as_u64(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><u64> { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">match </span><span class="self">self</span>.n { |
| N::PosInt(n) => <span class="prelude-val">Some</span>(n), |
| N::NegInt(<span class="kw">_</span>) | N::Float(<span class="kw">_</span>) => <span class="prelude-val">None</span>, |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="self">self</span>.n.parse().ok() |
| } |
| |
| <span class="doccomment">/// Represents the number as f64 if possible. Returns None otherwise. |
| /// |
| /// ``` |
| /// # use serde_json::json; |
| /// # |
| /// let v = json!({ "a": 256.0, "b": 64, "c": -64 }); |
| /// |
| /// assert_eq!(v["a"].as_f64(), Some(256.0)); |
| /// assert_eq!(v["b"].as_f64(), Some(64.0)); |
| /// assert_eq!(v["c"].as_f64(), Some(-64.0)); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>as_f64(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><f64> { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">match </span><span class="self">self</span>.n { |
| N::PosInt(n) => <span class="prelude-val">Some</span>(n <span class="kw">as </span>f64), |
| N::NegInt(n) => <span class="prelude-val">Some</span>(n <span class="kw">as </span>f64), |
| N::Float(n) => <span class="prelude-val">Some</span>(n), |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="self">self</span>.n.parse::<f64>().ok().filter(|float| float.is_finite()) |
| } |
| |
| <span class="doccomment">/// Converts a finite `f64` to a `Number`. Infinite or NaN values are not JSON |
| /// numbers. |
| /// |
| /// ``` |
| /// # use std::f64; |
| /// # |
| /// # use serde_json::Number; |
| /// # |
| /// assert!(Number::from_f64(256.0).is_some()); |
| /// |
| /// assert!(Number::from_f64(f64::NAN).is_none()); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>from_f64(f: f64) -> <span class="prelude-ty">Option</span><Number> { |
| <span class="kw">if </span>f.is_finite() { |
| <span class="kw">let </span>n = { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span>{ |
| N::Float(f) |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span>{ |
| ryu::Buffer::new().format_finite(f).to_owned() |
| } |
| }; |
| <span class="prelude-val">Some</span>(Number { n }) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>as_f32(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><f32> { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">match </span><span class="self">self</span>.n { |
| N::PosInt(n) => <span class="prelude-val">Some</span>(n <span class="kw">as </span>f32), |
| N::NegInt(n) => <span class="prelude-val">Some</span>(n <span class="kw">as </span>f32), |
| N::Float(n) => <span class="prelude-val">Some</span>(n <span class="kw">as </span>f32), |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="self">self</span>.n.parse::<f32>().ok().filter(|float| float.is_finite()) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>from_f32(f: f32) -> <span class="prelude-ty">Option</span><Number> { |
| <span class="kw">if </span>f.is_finite() { |
| <span class="kw">let </span>n = { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span>{ |
| N::Float(f <span class="kw">as </span>f64) |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span>{ |
| ryu::Buffer::new().format_finite(f).to_owned() |
| } |
| }; |
| <span class="prelude-val">Some</span>(Number { n }) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="doccomment">/// Not public API. Only tests use this. |
| </span><span class="attribute">#[doc(hidden)] |
| #[inline] |
| </span><span class="kw">pub fn </span>from_string_unchecked(n: String) -> <span class="self">Self </span>{ |
| Number { n } |
| } |
| } |
| |
| <span class="kw">impl </span>Display <span class="kw">for </span>Number { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, formatter: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| <span class="kw">match </span><span class="self">self</span>.n { |
| N::PosInt(u) => formatter.write_str(itoa::Buffer::new().format(u)), |
| N::NegInt(i) => formatter.write_str(itoa::Buffer::new().format(i)), |
| N::Float(f) => formatter.write_str(ryu::Buffer::new().format_finite(f)), |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, formatter: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| Display::fmt(<span class="kw-2">&</span><span class="self">self</span>.n, formatter) |
| } |
| } |
| |
| <span class="kw">impl </span>Debug <span class="kw">for </span>Number { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, formatter: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| <span class="macro">write!</span>(formatter, <span class="string">"Number({})"</span>, <span class="self">self</span>) |
| } |
| } |
| |
| <span class="kw">impl </span>Serialize <span class="kw">for </span>Number { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| #[inline] |
| </span><span class="kw">fn </span>serialize<S>(<span class="kw-2">&</span><span class="self">self</span>, serializer: S) -> <span class="prelude-ty">Result</span><S::Ok, S::Error> |
| <span class="kw">where |
| </span>S: Serializer, |
| { |
| <span class="kw">match </span><span class="self">self</span>.n { |
| N::PosInt(u) => serializer.serialize_u64(u), |
| N::NegInt(i) => serializer.serialize_i64(i), |
| N::Float(f) => serializer.serialize_f64(f), |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| #[inline] |
| </span><span class="kw">fn </span>serialize<S>(<span class="kw-2">&</span><span class="self">self</span>, serializer: S) -> <span class="prelude-ty">Result</span><S::Ok, S::Error> |
| <span class="kw">where |
| </span>S: Serializer, |
| { |
| <span class="kw">use </span>serde::ser::SerializeStruct; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>s = serializer.serialize_struct(TOKEN, <span class="number">1</span>)<span class="question-mark">?</span>; |
| s.serialize_field(TOKEN, <span class="kw-2">&</span><span class="self">self</span>.n)<span class="question-mark">?</span>; |
| s.end() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'de</span>> Deserialize<<span class="lifetime">'de</span>> <span class="kw">for </span>Number { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>deserialize<D>(deserializer: D) -> <span class="prelude-ty">Result</span><Number, D::Error> |
| <span class="kw">where |
| </span>D: Deserializer<<span class="lifetime">'de</span>>, |
| { |
| <span class="kw">struct </span>NumberVisitor; |
| |
| <span class="kw">impl</span><<span class="lifetime">'de</span>> Visitor<<span class="lifetime">'de</span>> <span class="kw">for </span>NumberVisitor { |
| <span class="kw">type </span>Value = Number; |
| |
| <span class="kw">fn </span>expecting(<span class="kw-2">&</span><span class="self">self</span>, formatter: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| formatter.write_str(<span class="string">"a JSON number"</span>) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>visit_i64<E>(<span class="self">self</span>, value: i64) -> <span class="prelude-ty">Result</span><Number, E> { |
| <span class="prelude-val">Ok</span>(value.into()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>visit_u64<E>(<span class="self">self</span>, value: u64) -> <span class="prelude-ty">Result</span><Number, E> { |
| <span class="prelude-val">Ok</span>(value.into()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>visit_f64<E>(<span class="self">self</span>, value: f64) -> <span class="prelude-ty">Result</span><Number, E> |
| <span class="kw">where |
| </span>E: de::Error, |
| { |
| Number::from_f64(value).ok_or_else(|| de::Error::custom(<span class="string">"not a JSON number"</span>)) |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| #[inline] |
| </span><span class="kw">fn </span>visit_map<V>(<span class="self">self</span>, <span class="kw-2">mut </span>visitor: V) -> <span class="prelude-ty">Result</span><Number, V::Error> |
| <span class="kw">where |
| </span>V: de::MapAccess<<span class="lifetime">'de</span>>, |
| { |
| <span class="kw">let </span>value = visitor.next_key::<NumberKey>()<span class="question-mark">?</span>; |
| <span class="kw">if </span>value.is_none() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(de::Error::invalid_type(Unexpected::Map, <span class="kw-2">&</span><span class="self">self</span>)); |
| } |
| <span class="kw">let </span>v: NumberFromString = visitor.next_value()<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(v.value) |
| } |
| } |
| |
| deserializer.deserialize_any(NumberVisitor) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">struct </span>NumberKey; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">impl</span><<span class="lifetime">'de</span>> de::Deserialize<<span class="lifetime">'de</span>> <span class="kw">for </span>NumberKey { |
| <span class="kw">fn </span>deserialize<D>(deserializer: D) -> <span class="prelude-ty">Result</span><NumberKey, D::Error> |
| <span class="kw">where |
| </span>D: de::Deserializer<<span class="lifetime">'de</span>>, |
| { |
| <span class="kw">struct </span>FieldVisitor; |
| |
| <span class="kw">impl</span><<span class="lifetime">'de</span>> de::Visitor<<span class="lifetime">'de</span>> <span class="kw">for </span>FieldVisitor { |
| <span class="kw">type </span>Value = (); |
| |
| <span class="kw">fn </span>expecting(<span class="kw-2">&</span><span class="self">self</span>, formatter: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| formatter.write_str(<span class="string">"a valid number field"</span>) |
| } |
| |
| <span class="kw">fn </span>visit_str<E>(<span class="self">self</span>, s: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><(), E> |
| <span class="kw">where |
| </span>E: de::Error, |
| { |
| <span class="kw">if </span>s == TOKEN { |
| <span class="prelude-val">Ok</span>(()) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(de::Error::custom(<span class="string">"expected field with custom name"</span>)) |
| } |
| } |
| } |
| |
| deserializer.deserialize_identifier(FieldVisitor)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(NumberKey) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">pub struct </span>NumberFromString { |
| <span class="kw">pub </span>value: Number, |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">impl</span><<span class="lifetime">'de</span>> de::Deserialize<<span class="lifetime">'de</span>> <span class="kw">for </span>NumberFromString { |
| <span class="kw">fn </span>deserialize<D>(deserializer: D) -> <span class="prelude-ty">Result</span><NumberFromString, D::Error> |
| <span class="kw">where |
| </span>D: de::Deserializer<<span class="lifetime">'de</span>>, |
| { |
| <span class="kw">struct </span>Visitor; |
| |
| <span class="kw">impl</span><<span class="lifetime">'de</span>> de::Visitor<<span class="lifetime">'de</span>> <span class="kw">for </span>Visitor { |
| <span class="kw">type </span>Value = NumberFromString; |
| |
| <span class="kw">fn </span>expecting(<span class="kw-2">&</span><span class="self">self</span>, formatter: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| formatter.write_str(<span class="string">"string containing a number"</span>) |
| } |
| |
| <span class="kw">fn </span>visit_str<E>(<span class="self">self</span>, s: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><NumberFromString, E> |
| <span class="kw">where |
| </span>E: de::Error, |
| { |
| <span class="kw">let </span>n = <span class="macro">tri!</span>(s.parse().map_err(de::Error::custom)); |
| <span class="prelude-val">Ok</span>(NumberFromString { value: n }) |
| } |
| } |
| |
| deserializer.deserialize_str(Visitor) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">fn </span>invalid_number() -> Error { |
| Error::syntax(ErrorCode::InvalidNumber, <span class="number">0</span>, <span class="number">0</span>) |
| } |
| |
| <span class="macro">macro_rules! </span>deserialize_any { |
| (@expand [$(<span class="macro-nonterminal">$num_string</span>:tt)<span class="kw-2">*</span>]) => { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| #[inline] |
| </span><span class="kw">fn </span>deserialize_any<V>(<span class="self">self</span>, visitor: V) -> <span class="prelude-ty">Result</span><V::Value, Error> |
| <span class="kw">where |
| </span>V: Visitor<<span class="lifetime">'de</span>>, |
| { |
| <span class="kw">match </span><span class="self">self</span>.n { |
| N::PosInt(u) => visitor.visit_u64(u), |
| N::NegInt(i) => visitor.visit_i64(i), |
| N::Float(f) => visitor.visit_f64(f), |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| #[inline] |
| </span><span class="kw">fn </span>deserialize_any<V>(<span class="self">self</span>, visitor: V) -> <span class="prelude-ty">Result</span><V::Value, Error> |
| <span class="kw">where </span>V: Visitor<<span class="lifetime">'de</span>> |
| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(u) = <span class="self">self</span>.as_u64() { |
| <span class="kw">return </span>visitor.visit_u64(u); |
| } <span class="kw">else if let </span><span class="prelude-val">Some</span>(i) = <span class="self">self</span>.as_i64() { |
| <span class="kw">return </span>visitor.visit_i64(i); |
| } <span class="kw">else if let </span><span class="prelude-val">Some</span>(f) = <span class="self">self</span>.as_f64() { |
| <span class="kw">if </span>ryu::Buffer::new().format_finite(f) == <span class="self">self</span>.n || f.to_string() == <span class="self">self</span>.n { |
| <span class="kw">return </span>visitor.visit_f64(f); |
| } |
| } |
| |
| visitor.visit_map(NumberDeserializer { |
| number: <span class="prelude-val">Some</span>(<span class="self">self</span>.$(<span class="macro-nonterminal">$num_string</span>)<span class="kw-2">*</span>), |
| }) |
| } |
| }; |
| |
| (owned) => { |
| <span class="macro">deserialize_any!</span>(@expand [n]); |
| }; |
| |
| (<span class="kw-2">ref</span>) => { |
| <span class="macro">deserialize_any!</span>(@expand [n.clone()]); |
| }; |
| } |
| |
| <span class="macro">macro_rules! </span>deserialize_number { |
| (<span class="macro-nonterminal">$deserialize</span>:ident => <span class="macro-nonterminal">$visit</span>:ident) => { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span><span class="kw">fn </span><span class="macro-nonterminal">$deserialize</span><V>(<span class="self">self</span>, visitor: V) -> <span class="prelude-ty">Result</span><V::Value, Error> |
| <span class="kw">where |
| </span>V: Visitor<<span class="lifetime">'de</span>>, |
| { |
| <span class="self">self</span>.deserialize_any(visitor) |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">fn </span><span class="macro-nonterminal">$deserialize</span><V>(<span class="self">self</span>, visitor: V) -> <span class="prelude-ty">Result</span><V::Value, Error> |
| <span class="kw">where |
| </span>V: de::Visitor<<span class="lifetime">'de</span>>, |
| { |
| visitor.<span class="macro-nonterminal">$visit</span>(<span class="self">self</span>.n.parse().map_err(|<span class="kw">_</span>| invalid_number())<span class="question-mark">?</span>) |
| } |
| }; |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'de</span>> Deserializer<<span class="lifetime">'de</span>> <span class="kw">for </span>Number { |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="macro">deserialize_any!</span>(owned); |
| |
| <span class="macro">deserialize_number!</span>(deserialize_i8 => visit_i8); |
| <span class="macro">deserialize_number!</span>(deserialize_i16 => visit_i16); |
| <span class="macro">deserialize_number!</span>(deserialize_i32 => visit_i32); |
| <span class="macro">deserialize_number!</span>(deserialize_i64 => visit_i64); |
| <span class="macro">deserialize_number!</span>(deserialize_i128 => visit_i128); |
| <span class="macro">deserialize_number!</span>(deserialize_u8 => visit_u8); |
| <span class="macro">deserialize_number!</span>(deserialize_u16 => visit_u16); |
| <span class="macro">deserialize_number!</span>(deserialize_u32 => visit_u32); |
| <span class="macro">deserialize_number!</span>(deserialize_u64 => visit_u64); |
| <span class="macro">deserialize_number!</span>(deserialize_u128 => visit_u128); |
| <span class="macro">deserialize_number!</span>(deserialize_f32 => visit_f32); |
| <span class="macro">deserialize_number!</span>(deserialize_f64 => visit_f64); |
| |
| <span class="macro">forward_to_deserialize_any! </span>{ |
| bool char str string bytes byte_buf option unit unit_struct |
| newtype_struct seq tuple tuple_struct map <span class="kw">struct enum </span>identifier |
| ignored_any |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'de</span>, <span class="lifetime">'a</span>> Deserializer<<span class="lifetime">'de</span>> <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span>Number { |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="macro">deserialize_any!</span>(<span class="kw-2">ref</span>); |
| |
| <span class="macro">deserialize_number!</span>(deserialize_i8 => visit_i8); |
| <span class="macro">deserialize_number!</span>(deserialize_i16 => visit_i16); |
| <span class="macro">deserialize_number!</span>(deserialize_i32 => visit_i32); |
| <span class="macro">deserialize_number!</span>(deserialize_i64 => visit_i64); |
| <span class="macro">deserialize_number!</span>(deserialize_i128 => visit_i128); |
| <span class="macro">deserialize_number!</span>(deserialize_u8 => visit_u8); |
| <span class="macro">deserialize_number!</span>(deserialize_u16 => visit_u16); |
| <span class="macro">deserialize_number!</span>(deserialize_u32 => visit_u32); |
| <span class="macro">deserialize_number!</span>(deserialize_u64 => visit_u64); |
| <span class="macro">deserialize_number!</span>(deserialize_u128 => visit_u128); |
| <span class="macro">deserialize_number!</span>(deserialize_f32 => visit_f32); |
| <span class="macro">deserialize_number!</span>(deserialize_f64 => visit_f64); |
| |
| <span class="macro">forward_to_deserialize_any! </span>{ |
| bool char str string bytes byte_buf option unit unit_struct |
| newtype_struct seq tuple tuple_struct map <span class="kw">struct enum </span>identifier |
| ignored_any |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>NumberDeserializer { |
| <span class="kw">pub </span>number: <span class="prelude-ty">Option</span><String>, |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">impl</span><<span class="lifetime">'de</span>> MapAccess<<span class="lifetime">'de</span>> <span class="kw">for </span>NumberDeserializer { |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>next_key_seed<K>(<span class="kw-2">&mut </span><span class="self">self</span>, seed: K) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><K::Value>, Error> |
| <span class="kw">where |
| </span>K: de::DeserializeSeed<<span class="lifetime">'de</span>>, |
| { |
| <span class="kw">if </span><span class="self">self</span>.number.is_none() { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>); |
| } |
| seed.deserialize(NumberFieldDeserializer).map(<span class="prelude-val">Some</span>) |
| } |
| |
| <span class="kw">fn </span>next_value_seed<V>(<span class="kw-2">&mut </span><span class="self">self</span>, seed: V) -> <span class="prelude-ty">Result</span><V::Value, Error> |
| <span class="kw">where |
| </span>V: de::DeserializeSeed<<span class="lifetime">'de</span>>, |
| { |
| seed.deserialize(<span class="self">self</span>.number.take().unwrap().into_deserializer()) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">struct </span>NumberFieldDeserializer; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="kw">impl</span><<span class="lifetime">'de</span>> Deserializer<<span class="lifetime">'de</span>> <span class="kw">for </span>NumberFieldDeserializer { |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>deserialize_any<V>(<span class="self">self</span>, visitor: V) -> <span class="prelude-ty">Result</span><V::Value, Error> |
| <span class="kw">where |
| </span>V: de::Visitor<<span class="lifetime">'de</span>>, |
| { |
| visitor.visit_borrowed_str(TOKEN) |
| } |
| |
| <span class="macro">forward_to_deserialize_any! </span>{ |
| bool u8 u16 u32 u64 u128 i8 i16 i32 i64 i128 f32 f64 char str string seq |
| bytes byte_buf map <span class="kw">struct </span>option unit newtype_struct ignored_any |
| unit_struct tuple_struct tuple <span class="kw">enum </span>identifier |
| } |
| } |
| |
| <span class="kw">impl </span>From<ParserNumber> <span class="kw">for </span>Number { |
| <span class="kw">fn </span>from(value: ParserNumber) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>n = <span class="kw">match </span>value { |
| ParserNumber::F64(f) => { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span>{ |
| N::Float(f) |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span>{ |
| f.to_string() |
| } |
| } |
| ParserNumber::U64(u) => { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span>{ |
| N::PosInt(u) |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span>{ |
| u.to_string() |
| } |
| } |
| ParserNumber::I64(i) => { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span>{ |
| N::NegInt(i) |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span>{ |
| i.to_string() |
| } |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span>ParserNumber::String(s) => s, |
| }; |
| Number { n } |
| } |
| } |
| |
| <span class="macro">macro_rules! </span>impl_from_unsigned { |
| ( |
| $(<span class="macro-nonterminal">$ty</span>:ty),* |
| ) => { |
| $( |
| <span class="kw">impl </span>From<<span class="macro-nonterminal">$ty</span>> <span class="kw">for </span>Number { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>from(u: <span class="macro-nonterminal">$ty</span>) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>n = { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span>{ N::PosInt(u <span class="kw">as </span>u64) } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span>{ |
| itoa::Buffer::new().format(u).to_owned() |
| } |
| }; |
| Number { n } |
| } |
| } |
| )* |
| }; |
| } |
| |
| <span class="macro">macro_rules! </span>impl_from_signed { |
| ( |
| $(<span class="macro-nonterminal">$ty</span>:ty),* |
| ) => { |
| $( |
| <span class="kw">impl </span>From<<span class="macro-nonterminal">$ty</span>> <span class="kw">for </span>Number { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>from(i: <span class="macro-nonterminal">$ty</span>) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>n = { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| </span>{ |
| <span class="kw">if </span>i < <span class="number">0 </span>{ |
| N::NegInt(i <span class="kw">as </span>i64) |
| } <span class="kw">else </span>{ |
| N::PosInt(i <span class="kw">as </span>u64) |
| } |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span>{ |
| itoa::Buffer::new().format(i).to_owned() |
| } |
| }; |
| Number { n } |
| } |
| } |
| )* |
| }; |
| } |
| |
| <span class="macro">impl_from_unsigned!</span>(u8, u16, u32, u64, usize); |
| <span class="macro">impl_from_signed!</span>(i8, i16, i32, i64, isize); |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="macro">impl_from_unsigned!</span>(u128); |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| </span><span class="macro">impl_from_signed!</span>(i128); |
| |
| <span class="kw">impl </span>Number { |
| <span class="attribute">#[cfg(not(feature = <span class="string">"arbitrary_precision"</span>))] |
| #[cold] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>unexpected(<span class="kw-2">&</span><span class="self">self</span>) -> Unexpected { |
| <span class="kw">match </span><span class="self">self</span>.n { |
| N::PosInt(u) => Unexpected::Unsigned(u), |
| N::NegInt(i) => Unexpected::Signed(i), |
| N::Float(f) => Unexpected::Float(f), |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary_precision"</span>)] |
| #[cold] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>unexpected(<span class="kw-2">&</span><span class="self">self</span>) -> Unexpected { |
| Unexpected::Other(<span class="string">"number"</span>) |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="serde_json" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
