| <!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/value-bag-1.4.0/src/internal/cast/mod.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>mod.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="../../../../value_bag/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="../../../../value_bag/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="589">589</span> |
| </pre><pre class="rust"><code><span class="doccomment">//! Coerce a `Value` into some concrete types. |
| //! |
| //! These operations are cheap when the captured value is a simple primitive, |
| //! but may end up executing arbitrary caller code if the value is complex. |
| //! They will also attempt to downcast erased types into a primitive where possible. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::std::{ |
| convert::{TryFrom, TryInto}, |
| fmt, |
| }; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"std"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::std::{borrow::ToOwned, string::String}; |
| |
| <span class="kw">use super</span>::{Internal, InternalVisitor}; |
| <span class="kw">use crate</span>::{Error, ValueBag}; |
| |
| <span class="kw">mod </span>primitive; |
| |
| <span class="kw">impl</span><<span class="lifetime">'v</span>> ValueBag<<span class="lifetime">'v</span>> { |
| <span class="doccomment">/// Try capture a raw value. |
| /// |
| /// This method will return `Some` if the value is a simple primitive |
| /// that can be captured without losing its structure. In other cases |
| /// this method will return `None`. |
| </span><span class="kw">pub fn </span>try_capture<T>(value: <span class="kw-2">&</span><span class="lifetime">'v </span>T) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>> |
| <span class="kw">where |
| </span>T: <span class="question-mark">?</span>Sized + <span class="lifetime">'static</span>, |
| { |
| primitive::from_any(value).map(|inner| ValueBag { inner }) |
| } |
| |
| <span class="doccomment">/// Try get a `u64` from this value. |
| /// |
| /// This method is cheap for primitive types, but may call arbitrary |
| /// serialization implementations for complex ones. |
| </span><span class="kw">pub fn </span>to_u64(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><u64> { |
| <span class="self">self</span>.inner.cast().into_u64() |
| } |
| |
| <span class="doccomment">/// Try get a `i64` from this value. |
| /// |
| /// This method is cheap for primitive types, but may call arbitrary |
| /// serialization implementations for complex ones. |
| </span><span class="kw">pub fn </span>to_i64(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><i64> { |
| <span class="self">self</span>.inner.cast().into_i64() |
| } |
| |
| <span class="doccomment">/// Try get a `u128` from this value. |
| /// |
| /// This method is cheap for primitive types, but may call arbitrary |
| /// serialization implementations for complex ones. |
| </span><span class="kw">pub fn </span>to_u128(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><u128> { |
| <span class="self">self</span>.inner.cast().into_u128() |
| } |
| |
| <span class="doccomment">/// Try get a `i128` from this value. |
| /// |
| /// This method is cheap for primitive types, but may call arbitrary |
| /// serialization implementations for complex ones. |
| </span><span class="kw">pub fn </span>to_i128(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><i128> { |
| <span class="self">self</span>.inner.cast().into_i128() |
| } |
| |
| <span class="doccomment">/// Try get a `f64` from this value. |
| /// |
| /// This method is cheap for primitive types, but may call arbitrary |
| /// serialization implementations for complex ones. |
| </span><span class="kw">pub fn </span>to_f64(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><f64> { |
| <span class="self">self</span>.inner.cast().into_f64() |
| } |
| |
| <span class="doccomment">/// Try get a `bool` from this value. |
| /// |
| /// This method is cheap for primitive types, but may call arbitrary |
| /// serialization implementations for complex ones. |
| </span><span class="kw">pub fn </span>to_bool(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><bool> { |
| <span class="self">self</span>.inner.cast().into_bool() |
| } |
| |
| <span class="doccomment">/// Try get a `char` from this value. |
| /// |
| /// This method is cheap for primitive types, but may call arbitrary |
| /// serialization implementations for complex ones. |
| </span><span class="kw">pub fn </span>to_char(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><char> { |
| <span class="self">self</span>.inner.cast().into_char() |
| } |
| |
| <span class="doccomment">/// Try get a `str` from this value. |
| /// |
| /// This method is cheap for primitive types. It won't allocate an owned |
| /// `String` if the value is a complex type. |
| </span><span class="kw">pub fn </span>to_borrowed_str(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'v </span>str> { |
| <span class="self">self</span>.inner.cast().into_borrowed_str() |
| } |
| |
| <span class="doccomment">/// Check whether this value can be downcast to `T`. |
| </span><span class="kw">pub fn </span>is<T: <span class="lifetime">'static</span>>(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.downcast_ref::<T>().is_some() |
| } |
| |
| <span class="doccomment">/// Try downcast this value to `T`. |
| </span><span class="kw">pub fn </span>downcast_ref<T: <span class="lifetime">'static</span>>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>T> { |
| <span class="kw">match </span><span class="self">self</span>.inner { |
| Internal::Debug(value) => value.as_any().downcast_ref(), |
| Internal::Display(value) => value.as_any().downcast_ref(), |
| <span class="attribute">#[cfg(feature = <span class="string">"error"</span>)] |
| </span>Internal::Error(value) => value.as_any().downcast_ref(), |
| <span class="attribute">#[cfg(feature = <span class="string">"sval2"</span>)] |
| </span>Internal::Sval2(value) => value.as_any().downcast_ref(), |
| <span class="attribute">#[cfg(feature = <span class="string">"serde1"</span>)] |
| </span>Internal::Serde1(value) => value.as_any().downcast_ref(), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'v</span>> Internal<<span class="lifetime">'v</span>> { |
| <span class="doccomment">/// Cast the inner value to another type. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>cast(<span class="kw-2">&</span><span class="self">self</span>) -> Cast<<span class="lifetime">'v</span>> { |
| <span class="kw">struct </span>CastVisitor<<span class="lifetime">'v</span>>(Cast<<span class="lifetime">'v</span>>); |
| |
| <span class="kw">impl</span><<span class="lifetime">'v</span>> InternalVisitor<<span class="lifetime">'v</span>> <span class="kw">for </span>CastVisitor<<span class="lifetime">'v</span>> { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>debug(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw">_</span>: <span class="kw-2">&</span><span class="kw">dyn </span>fmt::Debug) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>display(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw">_</span>: <span class="kw-2">&</span><span class="kw">dyn </span>fmt::Display) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>u64(<span class="kw-2">&mut </span><span class="self">self</span>, v: u64) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="self">self</span>.<span class="number">0 </span>= Cast::Unsigned(v); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>i64(<span class="kw-2">&mut </span><span class="self">self</span>, v: i64) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="self">self</span>.<span class="number">0 </span>= Cast::Signed(v); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>u128(<span class="kw-2">&mut </span><span class="self">self</span>, v: <span class="kw-2">&</span>u128) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="self">self</span>.<span class="number">0 </span>= Cast::BigUnsigned(<span class="kw-2">*</span>v); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>i128(<span class="kw-2">&mut </span><span class="self">self</span>, v: <span class="kw-2">&</span>i128) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="self">self</span>.<span class="number">0 </span>= Cast::BigSigned(<span class="kw-2">*</span>v); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>f64(<span class="kw-2">&mut </span><span class="self">self</span>, v: f64) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="self">self</span>.<span class="number">0 </span>= Cast::Float(v); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>bool(<span class="kw-2">&mut </span><span class="self">self</span>, v: bool) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="self">self</span>.<span class="number">0 </span>= Cast::Bool(v); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>char(<span class="kw-2">&mut </span><span class="self">self</span>, v: char) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="self">self</span>.<span class="number">0 </span>= Cast::Char(v); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"std"</span>)] |
| #[inline] |
| </span><span class="kw">fn </span>str(<span class="kw-2">&mut </span><span class="self">self</span>, s: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="self">self</span>.<span class="number">0 </span>= Cast::String(s.to_owned()); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[cfg(not(feature = <span class="string">"std"</span>))] |
| #[inline] |
| </span><span class="kw">fn </span>str(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw">_</span>: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>borrowed_str(<span class="kw-2">&mut </span><span class="self">self</span>, v: <span class="kw-2">&</span><span class="lifetime">'v </span>str) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="self">self</span>.<span class="number">0 </span>= Cast::Str(v); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>none(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="self">self</span>.<span class="number">0 </span>= Cast::None; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"error"</span>)] |
| #[inline] |
| </span><span class="kw">fn </span>error(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw">_</span>: <span class="kw-2">&</span><span class="kw">dyn </span><span class="kw">super</span>::error::Error) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"sval2"</span>)] |
| #[inline] |
| </span><span class="kw">fn </span>sval2(<span class="kw-2">&mut </span><span class="self">self</span>, v: <span class="kw-2">&</span><span class="kw">dyn </span><span class="kw">super</span>::sval::v2::Value) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">super</span>::sval::v2::internal_visit(v, <span class="self">self</span>) |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"sval2"</span>)] |
| </span><span class="kw">fn </span>borrowed_sval2(<span class="kw-2">&mut </span><span class="self">self</span>, v: <span class="kw-2">&</span><span class="lifetime">'v </span><span class="kw">dyn </span><span class="kw">super</span>::sval::v2::Value) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">super</span>::sval::v2::borrowed_internal_visit(v, <span class="self">self</span>) |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"serde1"</span>)] |
| #[inline] |
| </span><span class="kw">fn </span>serde1(<span class="kw-2">&mut </span><span class="self">self</span>, v: <span class="kw-2">&</span><span class="kw">dyn </span><span class="kw">super</span>::serde::v1::Serialize) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">super</span>::serde::v1::internal_visit(v, <span class="self">self</span>) |
| } |
| } |
| |
| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self </span>{ |
| Internal::Signed(value) => Cast::Signed(<span class="kw-2">*</span>value), |
| Internal::Unsigned(value) => Cast::Unsigned(<span class="kw-2">*</span>value), |
| <span class="attribute">#[cfg(feature = <span class="string">"inline-i128"</span>)] |
| </span>Internal::BigSigned(value) => Cast::BigSigned(<span class="kw-2">*</span>value), |
| <span class="attribute">#[cfg(not(feature = <span class="string">"inline-i128"</span>))] |
| </span>Internal::BigSigned(value) => Cast::BigSigned(<span class="kw-2">**</span>value), |
| <span class="attribute">#[cfg(feature = <span class="string">"inline-i128"</span>)] |
| </span>Internal::BigUnsigned(value) => Cast::BigUnsigned(<span class="kw-2">*</span>value), |
| <span class="attribute">#[cfg(not(feature = <span class="string">"inline-i128"</span>))] |
| </span>Internal::BigUnsigned(value) => Cast::BigUnsigned(<span class="kw-2">**</span>value), |
| Internal::Float(value) => Cast::Float(<span class="kw-2">*</span>value), |
| Internal::Bool(value) => Cast::Bool(<span class="kw-2">*</span>value), |
| Internal::Char(value) => Cast::Char(<span class="kw-2">*</span>value), |
| Internal::Str(value) => Cast::Str(<span class="kw-2">*</span>value), |
| Internal::None => Cast::None, |
| other => { |
| <span class="comment">// If the erased value isn't a primitive then we visit it |
| </span><span class="kw">let </span><span class="kw-2">mut </span>cast = CastVisitor(Cast::None); |
| <span class="kw">let _ </span>= other.internal_visit(<span class="kw-2">&mut </span>cast); |
| cast.<span class="number">0 |
| </span>} |
| } |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">in </span><span class="kw">crate</span>::internal) <span class="kw">enum </span>Cast<<span class="lifetime">'v</span>> { |
| Signed(i64), |
| Unsigned(u64), |
| BigSigned(i128), |
| BigUnsigned(u128), |
| Float(f64), |
| Bool(bool), |
| Char(char), |
| Str(<span class="kw-2">&</span><span class="lifetime">'v </span>str), |
| <span class="prelude-val">None</span>, |
| <span class="attribute">#[cfg(feature = <span class="string">"std"</span>)] |
| </span>String(String), |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'v</span>> Cast<<span class="lifetime">'v</span>> { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>into_borrowed_str(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'v </span>str> { |
| <span class="kw">if let </span>Cast::Str(value) = <span class="self">self </span>{ |
| <span class="prelude-val">Some</span>(value) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>into_u64(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><u64> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| Cast::Unsigned(value) => <span class="prelude-val">Some</span>(value), |
| Cast::BigUnsigned(value) => value.try_into().ok(), |
| Cast::Signed(value) => value.try_into().ok(), |
| Cast::BigSigned(value) => value.try_into().ok(), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>into_i64(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><i64> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| Cast::Signed(value) => <span class="prelude-val">Some</span>(value), |
| Cast::BigSigned(value) => value.try_into().ok(), |
| Cast::Unsigned(value) => value.try_into().ok(), |
| Cast::BigUnsigned(value) => value.try_into().ok(), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>into_u128(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><u128> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| Cast::BigUnsigned(value) => <span class="prelude-val">Some</span>(value), |
| Cast::Unsigned(value) => <span class="prelude-val">Some</span>(value.into()), |
| Cast::Signed(value) => value.try_into().ok(), |
| Cast::BigSigned(value) => value.try_into().ok(), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>into_i128(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><i128> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| Cast::BigSigned(value) => <span class="prelude-val">Some</span>(value), |
| Cast::Signed(value) => <span class="prelude-val">Some</span>(value.into()), |
| Cast::Unsigned(value) => value.try_into().ok(), |
| Cast::BigUnsigned(value) => value.try_into().ok(), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>into_f64(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><f64> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| Cast::Float(value) => <span class="prelude-val">Some</span>(value), |
| Cast::Unsigned(value) => u32::try_from(value) |
| .ok() |
| .and_then(|value| value.try_into().ok()), |
| Cast::Signed(value) => i32::try_from(value) |
| .ok() |
| .and_then(|value| value.try_into().ok()), |
| Cast::BigUnsigned(value) => u32::try_from(value) |
| .ok() |
| .and_then(|value| value.try_into().ok()), |
| Cast::BigSigned(value) => i32::try_from(value) |
| .ok() |
| .and_then(|value| value.try_into().ok()), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>into_char(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><char> { |
| <span class="kw">if let </span>Cast::Char(value) = <span class="self">self </span>{ |
| <span class="prelude-val">Some</span>(value) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>into_bool(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><bool> { |
| <span class="kw">if let </span>Cast::Bool(value) = <span class="self">self </span>{ |
| <span class="prelude-val">Some</span>(value) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"std"</span>)] |
| </span><span class="kw">mod </span>std_support { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::std::borrow::Cow; |
| |
| <span class="kw">impl</span><<span class="lifetime">'v</span>> ValueBag<<span class="lifetime">'v</span>> { |
| <span class="doccomment">/// Try get a `str` from this value. |
| /// |
| /// This method is cheap for primitive types, but may call arbitrary |
| /// serialization implementations for complex ones. If the serialization |
| /// implementation produces a short lived string it will be allocated. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>to_str(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Cow<<span class="lifetime">'v</span>, str>> { |
| <span class="self">self</span>.inner.cast().into_str() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'v</span>> Cast<<span class="lifetime">'v</span>> { |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">in </span><span class="kw">crate</span>::internal) <span class="kw">fn </span>into_str(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><Cow<<span class="lifetime">'v</span>, str>> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| Cast::Str(value) => <span class="prelude-val">Some</span>(value.into()), |
| Cast::String(value) => <span class="prelude-val">Some</span>(value.into()), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="attribute">#[cfg(target_arch = <span class="string">"wasm32"</span>)] |
| </span><span class="kw">use </span>wasm_bindgen_test::<span class="kw-2">*</span>; |
| |
| <span class="kw">use crate</span>::{std::borrow::ToOwned, test::IntoValueBag, ValueBag}; |
| |
| <span class="attribute">#[test] |
| #[cfg_attr(target_arch = <span class="string">"wasm32"</span>, wasm_bindgen_test)] |
| </span><span class="kw">fn </span>primitive_cast() { |
| <span class="kw">let </span>short_lived = <span class="string">"a string"</span>.to_owned(); |
| <span class="macro">assert_eq!</span>( |
| <span class="string">"a string"</span>, |
| (<span class="kw-2">&*</span>short_lived) |
| .into_value_bag() |
| .to_borrowed_str() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| <span class="string">"a string"</span>, |
| <span class="kw-2">&*</span><span class="string">"a string"</span>.into_value_bag().to_str().expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| <span class="string">"a string"</span>, |
| (<span class="kw-2">&*</span>short_lived) |
| .into_value_bag() |
| .to_borrowed_str() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| <span class="string">"a string"</span>, |
| ValueBag::try_capture(<span class="kw-2">&</span>short_lived) |
| .expect(<span class="string">"invalid value"</span>) |
| .to_borrowed_str() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="attribute">#[cfg(target_arch = <span class="string">"wasm32"</span>)] |
| </span><span class="kw">use </span>wasm_bindgen_test::<span class="kw-2">*</span>; |
| |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::std::string::ToString; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::test::IntoValueBag; |
| |
| <span class="attribute">#[test] |
| #[cfg_attr(target_arch = <span class="string">"wasm32"</span>, wasm_bindgen_test)] |
| </span><span class="kw">fn </span>primitive_capture_str() { |
| <span class="kw">let </span>s: <span class="kw-2">&</span>str = <span class="kw-2">&</span><span class="string">"short lived"</span>.to_string(); |
| <span class="macro">assert_eq!</span>( |
| <span class="string">"short lived"</span>, |
| ValueBag::try_capture(s) |
| .unwrap() |
| .to_borrowed_str() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg_attr(target_arch = <span class="string">"wasm32"</span>, wasm_bindgen_test)] |
| </span><span class="kw">fn </span>primitive_cast() { |
| <span class="macro">assert_eq!</span>( |
| <span class="string">"a string"</span>, |
| <span class="string">"a string" |
| </span>.into_value_bag() |
| .by_ref() |
| .to_borrowed_str() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| |
| <span class="macro">assert_eq!</span>( |
| <span class="number">1u64</span>, |
| <span class="number">1u8</span>.into_value_bag() |
| .by_ref() |
| .to_u64() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| <span class="number">1u64</span>, |
| <span class="number">1u16</span>.into_value_bag() |
| .by_ref() |
| .to_u64() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| <span class="number">1u64</span>, |
| <span class="number">1u32</span>.into_value_bag() |
| .by_ref() |
| .to_u64() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| <span class="number">1u64</span>, |
| <span class="number">1u64</span>.into_value_bag() |
| .by_ref() |
| .to_u64() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| <span class="number">1u64</span>, |
| <span class="number">1usize |
| </span>.into_value_bag() |
| .by_ref() |
| .to_u64() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| <span class="number">1u128</span>, |
| <span class="number">1u128 |
| </span>.into_value_bag() |
| .by_ref() |
| .to_u128() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| |
| <span class="macro">assert_eq!</span>( |
| -<span class="number">1i64</span>, |
| -<span class="number">1i8</span>.into_value_bag() |
| .by_ref() |
| .to_i64() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| -<span class="number">1i64</span>, |
| -<span class="number">1i8</span>.into_value_bag() |
| .by_ref() |
| .to_i64() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| -<span class="number">1i64</span>, |
| -<span class="number">1i8</span>.into_value_bag() |
| .by_ref() |
| .to_i64() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| -<span class="number">1i64</span>, |
| -<span class="number">1i64 |
| </span>.into_value_bag() |
| .by_ref() |
| .to_i64() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| -<span class="number">1i64</span>, |
| -<span class="number">1isize |
| </span>.into_value_bag() |
| .by_ref() |
| .to_i64() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| -<span class="number">1i128</span>, |
| -<span class="number">1i128 |
| </span>.into_value_bag() |
| .by_ref() |
| .to_i128() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| |
| <span class="macro">assert!</span>(<span class="number">1f64</span>.into_value_bag().by_ref().to_f64().is_some()); |
| <span class="macro">assert!</span>(<span class="number">1u64</span>.into_value_bag().by_ref().to_f64().is_some()); |
| <span class="macro">assert!</span>((-<span class="number">1i64</span>).into_value_bag().by_ref().to_f64().is_some()); |
| <span class="macro">assert!</span>(<span class="number">1u128</span>.into_value_bag().by_ref().to_f64().is_some()); |
| <span class="macro">assert!</span>((-<span class="number">1i128</span>).into_value_bag().by_ref().to_f64().is_some()); |
| |
| <span class="macro">assert!</span>(u64::MAX.into_value_bag().by_ref().to_u128().is_some()); |
| <span class="macro">assert!</span>(i64::MIN.into_value_bag().by_ref().to_i128().is_some()); |
| <span class="macro">assert!</span>(i64::MAX.into_value_bag().by_ref().to_u64().is_some()); |
| |
| <span class="macro">assert!</span>((-<span class="number">1i64</span>).into_value_bag().by_ref().to_u64().is_none()); |
| <span class="macro">assert!</span>(u64::MAX.into_value_bag().by_ref().to_i64().is_none()); |
| <span class="macro">assert!</span>(u64::MAX.into_value_bag().by_ref().to_f64().is_none()); |
| |
| <span class="macro">assert!</span>(i128::MAX.into_value_bag().by_ref().to_i64().is_none()); |
| <span class="macro">assert!</span>(u128::MAX.into_value_bag().by_ref().to_u64().is_none()); |
| |
| <span class="macro">assert!</span>(<span class="number">1f64</span>.into_value_bag().by_ref().to_u64().is_none()); |
| |
| <span class="macro">assert_eq!</span>( |
| <span class="string">'a'</span>, |
| <span class="string">'a'</span>.into_value_bag() |
| .by_ref() |
| .to_char() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| <span class="macro">assert_eq!</span>( |
| <span class="bool-val">true</span>, |
| <span class="bool-val">true</span>.into_value_bag() |
| .by_ref() |
| .to_bool() |
| .expect(<span class="string">"invalid value"</span>) |
| ); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="value_bag" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |