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<!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 `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/http-body-1.0.1/src/frame.rs`."><title>frame.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="http_body" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="../../static.files/src-script-813739b1.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">http_body/</div>frame.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="kw">use </span>http::HeaderMap;
<a href=#2 id=2 data-nosnippet>2</a>
<a href=#3 id=3 data-nosnippet>3</a><span class="doccomment">/// A frame of any kind related to an HTTP stream (body).
<a href=#4 id=4 data-nosnippet>4</a></span><span class="attr">#[derive(Debug)]
<a href=#5 id=5 data-nosnippet>5</a></span><span class="kw">pub struct </span>Frame&lt;T&gt; {
<a href=#6 id=6 data-nosnippet>6</a> kind: Kind&lt;T&gt;,
<a href=#7 id=7 data-nosnippet>7</a>}
<a href=#8 id=8 data-nosnippet>8</a>
<a href=#9 id=9 data-nosnippet>9</a><span class="attr">#[derive(Debug)]
<a href=#10 id=10 data-nosnippet>10</a></span><span class="kw">enum </span>Kind&lt;T&gt; {
<a href=#11 id=11 data-nosnippet>11</a> <span class="comment">// The first two variants are "inlined" since they are undoubtedly
<a href=#12 id=12 data-nosnippet>12</a> // the most common. This saves us from having to allocate a
<a href=#13 id=13 data-nosnippet>13</a> // boxed trait object for them.
<a href=#14 id=14 data-nosnippet>14</a> </span>Data(T),
<a href=#15 id=15 data-nosnippet>15</a> Trailers(HeaderMap),
<a href=#16 id=16 data-nosnippet>16</a> <span class="comment">//Unknown(Box&lt;dyn Frameish&gt;),
<a href=#17 id=17 data-nosnippet>17</a></span>}
<a href=#18 id=18 data-nosnippet>18</a>
<a href=#19 id=19 data-nosnippet>19</a><span class="kw">impl</span>&lt;T&gt; Frame&lt;T&gt; {
<a href=#20 id=20 data-nosnippet>20</a> <span class="doccomment">/// Create a DATA frame with the provided `Buf`.
<a href=#21 id=21 data-nosnippet>21</a> </span><span class="kw">pub fn </span>data(buf: T) -&gt; <span class="self">Self </span>{
<a href=#22 id=22 data-nosnippet>22</a> <span class="self">Self </span>{
<a href=#23 id=23 data-nosnippet>23</a> kind: Kind::Data(buf),
<a href=#24 id=24 data-nosnippet>24</a> }
<a href=#25 id=25 data-nosnippet>25</a> }
<a href=#26 id=26 data-nosnippet>26</a>
<a href=#27 id=27 data-nosnippet>27</a> <span class="doccomment">/// Create a trailers frame.
<a href=#28 id=28 data-nosnippet>28</a> </span><span class="kw">pub fn </span>trailers(map: HeaderMap) -&gt; <span class="self">Self </span>{
<a href=#29 id=29 data-nosnippet>29</a> <span class="self">Self </span>{
<a href=#30 id=30 data-nosnippet>30</a> kind: Kind::Trailers(map),
<a href=#31 id=31 data-nosnippet>31</a> }
<a href=#32 id=32 data-nosnippet>32</a> }
<a href=#33 id=33 data-nosnippet>33</a>
<a href=#34 id=34 data-nosnippet>34</a> <span class="doccomment">/// Maps this frame's data to a different type.
<a href=#35 id=35 data-nosnippet>35</a> </span><span class="kw">pub fn </span>map_data&lt;F, D&gt;(<span class="self">self</span>, f: F) -&gt; Frame&lt;D&gt;
<a href=#36 id=36 data-nosnippet>36</a> <span class="kw">where
<a href=#37 id=37 data-nosnippet>37</a> </span>F: FnOnce(T) -&gt; D,
<a href=#38 id=38 data-nosnippet>38</a> {
<a href=#39 id=39 data-nosnippet>39</a> <span class="kw">match </span><span class="self">self</span>.kind {
<a href=#40 id=40 data-nosnippet>40</a> Kind::Data(data) =&gt; Frame {
<a href=#41 id=41 data-nosnippet>41</a> kind: Kind::Data(f(data)),
<a href=#42 id=42 data-nosnippet>42</a> },
<a href=#43 id=43 data-nosnippet>43</a> Kind::Trailers(trailers) =&gt; Frame {
<a href=#44 id=44 data-nosnippet>44</a> kind: Kind::Trailers(trailers),
<a href=#45 id=45 data-nosnippet>45</a> },
<a href=#46 id=46 data-nosnippet>46</a> }
<a href=#47 id=47 data-nosnippet>47</a> }
<a href=#48 id=48 data-nosnippet>48</a>
<a href=#49 id=49 data-nosnippet>49</a> <span class="doccomment">/// Returns whether this is a DATA frame.
<a href=#50 id=50 data-nosnippet>50</a> </span><span class="kw">pub fn </span>is_data(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
<a href=#51 id=51 data-nosnippet>51</a> <span class="macro">matches!</span>(<span class="self">self</span>.kind, Kind::Data(..))
<a href=#52 id=52 data-nosnippet>52</a> }
<a href=#53 id=53 data-nosnippet>53</a>
<a href=#54 id=54 data-nosnippet>54</a> <span class="doccomment">/// Consumes self into the buf of the DATA frame.
<a href=#55 id=55 data-nosnippet>55</a> ///
<a href=#56 id=56 data-nosnippet>56</a> /// Returns an [`Err`] containing the original [`Frame`] when frame is not a DATA frame.
<a href=#57 id=57 data-nosnippet>57</a> /// `Frame::is_data` can also be used to determine if the frame is a DATA frame.
<a href=#58 id=58 data-nosnippet>58</a> </span><span class="kw">pub fn </span>into_data(<span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;T, <span class="self">Self</span>&gt; {
<a href=#59 id=59 data-nosnippet>59</a> <span class="kw">match </span><span class="self">self</span>.kind {
<a href=#60 id=60 data-nosnippet>60</a> Kind::Data(data) =&gt; <span class="prelude-val">Ok</span>(data),
<a href=#61 id=61 data-nosnippet>61</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">Err</span>(<span class="self">self</span>),
<a href=#62 id=62 data-nosnippet>62</a> }
<a href=#63 id=63 data-nosnippet>63</a> }
<a href=#64 id=64 data-nosnippet>64</a>
<a href=#65 id=65 data-nosnippet>65</a> <span class="doccomment">/// If this is a DATA frame, returns a reference to it.
<a href=#66 id=66 data-nosnippet>66</a> ///
<a href=#67 id=67 data-nosnippet>67</a> /// Returns `None` if not a DATA frame.
<a href=#68 id=68 data-nosnippet>68</a> </span><span class="kw">pub fn </span>data_ref(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;<span class="kw-2">&amp;</span>T&gt; {
<a href=#69 id=69 data-nosnippet>69</a> <span class="kw">match </span><span class="self">self</span>.kind {
<a href=#70 id=70 data-nosnippet>70</a> Kind::Data(<span class="kw-2">ref </span>data) =&gt; <span class="prelude-val">Some</span>(data),
<a href=#71 id=71 data-nosnippet>71</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
<a href=#72 id=72 data-nosnippet>72</a> }
<a href=#73 id=73 data-nosnippet>73</a> }
<a href=#74 id=74 data-nosnippet>74</a>
<a href=#75 id=75 data-nosnippet>75</a> <span class="doccomment">/// If this is a DATA frame, returns a mutable reference to it.
<a href=#76 id=76 data-nosnippet>76</a> ///
<a href=#77 id=77 data-nosnippet>77</a> /// Returns `None` if not a DATA frame.
<a href=#78 id=78 data-nosnippet>78</a> </span><span class="kw">pub fn </span>data_mut(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;<span class="kw-2">&amp;mut </span>T&gt; {
<a href=#79 id=79 data-nosnippet>79</a> <span class="kw">match </span><span class="self">self</span>.kind {
<a href=#80 id=80 data-nosnippet>80</a> Kind::Data(<span class="kw-2">ref mut </span>data) =&gt; <span class="prelude-val">Some</span>(data),
<a href=#81 id=81 data-nosnippet>81</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
<a href=#82 id=82 data-nosnippet>82</a> }
<a href=#83 id=83 data-nosnippet>83</a> }
<a href=#84 id=84 data-nosnippet>84</a>
<a href=#85 id=85 data-nosnippet>85</a> <span class="doccomment">/// Returns whether this is a trailers frame.
<a href=#86 id=86 data-nosnippet>86</a> </span><span class="kw">pub fn </span>is_trailers(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
<a href=#87 id=87 data-nosnippet>87</a> <span class="macro">matches!</span>(<span class="self">self</span>.kind, Kind::Trailers(..))
<a href=#88 id=88 data-nosnippet>88</a> }
<a href=#89 id=89 data-nosnippet>89</a>
<a href=#90 id=90 data-nosnippet>90</a> <span class="doccomment">/// Consumes self into the buf of the trailers frame.
<a href=#91 id=91 data-nosnippet>91</a> ///
<a href=#92 id=92 data-nosnippet>92</a> /// Returns an [`Err`] containing the original [`Frame`] when frame is not a trailers frame.
<a href=#93 id=93 data-nosnippet>93</a> /// `Frame::is_trailers` can also be used to determine if the frame is a trailers frame.
<a href=#94 id=94 data-nosnippet>94</a> </span><span class="kw">pub fn </span>into_trailers(<span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;HeaderMap, <span class="self">Self</span>&gt; {
<a href=#95 id=95 data-nosnippet>95</a> <span class="kw">match </span><span class="self">self</span>.kind {
<a href=#96 id=96 data-nosnippet>96</a> Kind::Trailers(trailers) =&gt; <span class="prelude-val">Ok</span>(trailers),
<a href=#97 id=97 data-nosnippet>97</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">Err</span>(<span class="self">self</span>),
<a href=#98 id=98 data-nosnippet>98</a> }
<a href=#99 id=99 data-nosnippet>99</a> }
<a href=#100 id=100 data-nosnippet>100</a>
<a href=#101 id=101 data-nosnippet>101</a> <span class="doccomment">/// If this is a trailers frame, returns a reference to it.
<a href=#102 id=102 data-nosnippet>102</a> ///
<a href=#103 id=103 data-nosnippet>103</a> /// Returns `None` if not a trailers frame.
<a href=#104 id=104 data-nosnippet>104</a> </span><span class="kw">pub fn </span>trailers_ref(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;<span class="kw-2">&amp;</span>HeaderMap&gt; {
<a href=#105 id=105 data-nosnippet>105</a> <span class="kw">match </span><span class="self">self</span>.kind {
<a href=#106 id=106 data-nosnippet>106</a> Kind::Trailers(<span class="kw-2">ref </span>trailers) =&gt; <span class="prelude-val">Some</span>(trailers),
<a href=#107 id=107 data-nosnippet>107</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
<a href=#108 id=108 data-nosnippet>108</a> }
<a href=#109 id=109 data-nosnippet>109</a> }
<a href=#110 id=110 data-nosnippet>110</a>
<a href=#111 id=111 data-nosnippet>111</a> <span class="doccomment">/// If this is a trailers frame, returns a mutable reference to it.
<a href=#112 id=112 data-nosnippet>112</a> ///
<a href=#113 id=113 data-nosnippet>113</a> /// Returns `None` if not a trailers frame.
<a href=#114 id=114 data-nosnippet>114</a> </span><span class="kw">pub fn </span>trailers_mut(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;<span class="kw-2">&amp;mut </span>HeaderMap&gt; {
<a href=#115 id=115 data-nosnippet>115</a> <span class="kw">match </span><span class="self">self</span>.kind {
<a href=#116 id=116 data-nosnippet>116</a> Kind::Trailers(<span class="kw-2">ref mut </span>trailers) =&gt; <span class="prelude-val">Some</span>(trailers),
<a href=#117 id=117 data-nosnippet>117</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
<a href=#118 id=118 data-nosnippet>118</a> }
<a href=#119 id=119 data-nosnippet>119</a> }
<a href=#120 id=120 data-nosnippet>120</a>}
</code></pre></div></section></main></body></html>
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<!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 `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/http-body-1.0.1/src/lib.rs`."><title>lib.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="http_body" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="../../static.files/src-script-813739b1.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">http_body/</div>lib.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="attr">#![deny(
<a href=#2 id=2 data-nosnippet>2</a> missing_debug_implementations,
<a href=#3 id=3 data-nosnippet>3</a> missing_docs,
<a href=#4 id=4 data-nosnippet>4</a> unreachable_pub,
<a href=#5 id=5 data-nosnippet>5</a> clippy::missing_safety_doc,
<a href=#6 id=6 data-nosnippet>6</a> clippy::undocumented_unsafe_blocks
<a href=#7 id=7 data-nosnippet>7</a>)]
<a href=#8 id=8 data-nosnippet>8</a>#![cfg_attr(test, deny(warnings))]
<a href=#9 id=9 data-nosnippet>9</a>
<a href=#10 id=10 data-nosnippet>10</a></span><span class="doccomment">//! Asynchronous HTTP request or response body.
<a href=#11 id=11 data-nosnippet>11</a>//!
<a href=#12 id=12 data-nosnippet>12</a>//! See [`Body`] for more details.
<a href=#13 id=13 data-nosnippet>13</a>//!
<a href=#14 id=14 data-nosnippet>14</a>//! [`Body`]: trait.Body.html
<a href=#15 id=15 data-nosnippet>15</a>
<a href=#16 id=16 data-nosnippet>16</a></span><span class="kw">mod </span>frame;
<a href=#17 id=17 data-nosnippet>17</a><span class="kw">mod </span>size_hint;
<a href=#18 id=18 data-nosnippet>18</a>
<a href=#19 id=19 data-nosnippet>19</a><span class="kw">pub use </span><span class="self">self</span>::frame::Frame;
<a href=#20 id=20 data-nosnippet>20</a><span class="kw">pub use </span><span class="self">self</span>::size_hint::SizeHint;
<a href=#21 id=21 data-nosnippet>21</a>
<a href=#22 id=22 data-nosnippet>22</a><span class="kw">use </span>bytes::{Buf, Bytes};
<a href=#23 id=23 data-nosnippet>23</a><span class="kw">use </span>std::convert::Infallible;
<a href=#24 id=24 data-nosnippet>24</a><span class="kw">use </span>std::ops;
<a href=#25 id=25 data-nosnippet>25</a><span class="kw">use </span>std::pin::Pin;
<a href=#26 id=26 data-nosnippet>26</a><span class="kw">use </span>std::task::{Context, Poll};
<a href=#27 id=27 data-nosnippet>27</a>
<a href=#28 id=28 data-nosnippet>28</a><span class="doccomment">/// Trait representing a streaming body of a Request or Response.
<a href=#29 id=29 data-nosnippet>29</a>///
<a href=#30 id=30 data-nosnippet>30</a>/// Individual frames are streamed via the `poll_frame` function, which asynchronously yields
<a href=#31 id=31 data-nosnippet>31</a>/// instances of [`Frame&lt;Data&gt;`].
<a href=#32 id=32 data-nosnippet>32</a>///
<a href=#33 id=33 data-nosnippet>33</a>/// Frames can contain a data buffer of type `Self::Data`. Frames can also contain an optional
<a href=#34 id=34 data-nosnippet>34</a>/// set of trailers used to finalize the request/response exchange. This is mostly used when using
<a href=#35 id=35 data-nosnippet>35</a>/// the HTTP/2.0 protocol.
<a href=#36 id=36 data-nosnippet>36</a>///
<a href=#37 id=37 data-nosnippet>37</a>/// The `size_hint` function provides insight into the total number of bytes that will be streamed.
<a href=#38 id=38 data-nosnippet>38</a></span><span class="kw">pub trait </span>Body {
<a href=#39 id=39 data-nosnippet>39</a> <span class="doccomment">/// Values yielded by the `Body`.
<a href=#40 id=40 data-nosnippet>40</a> </span><span class="kw">type </span>Data: Buf;
<a href=#41 id=41 data-nosnippet>41</a>
<a href=#42 id=42 data-nosnippet>42</a> <span class="doccomment">/// The error type this `Body` might generate.
<a href=#43 id=43 data-nosnippet>43</a> </span><span class="kw">type </span>Error;
<a href=#44 id=44 data-nosnippet>44</a>
<a href=#45 id=45 data-nosnippet>45</a> <span class="attr">#[allow(clippy::type_complexity)]
<a href=#46 id=46 data-nosnippet>46</a> </span><span class="doccomment">/// Attempt to pull out the next data buffer of this stream.
<a href=#47 id=47 data-nosnippet>47</a> </span><span class="kw">fn </span>poll_frame(
<a href=#48 id=48 data-nosnippet>48</a> <span class="self">self</span>: Pin&lt;<span class="kw-2">&amp;mut </span><span class="self">Self</span>&gt;,
<a href=#49 id=49 data-nosnippet>49</a> cx: <span class="kw-2">&amp;mut </span>Context&lt;<span class="lifetime">'_</span>&gt;,
<a href=#50 id=50 data-nosnippet>50</a> ) -&gt; Poll&lt;<span class="prelude-ty">Option</span>&lt;<span class="prelude-ty">Result</span>&lt;Frame&lt;<span class="self">Self</span>::Data&gt;, <span class="self">Self</span>::Error&gt;&gt;&gt;;
<a href=#51 id=51 data-nosnippet>51</a>
<a href=#52 id=52 data-nosnippet>52</a> <span class="doccomment">/// Returns `true` when the end of stream has been reached.
<a href=#53 id=53 data-nosnippet>53</a> ///
<a href=#54 id=54 data-nosnippet>54</a> /// An end of stream means that `poll_frame` will return `None`.
<a href=#55 id=55 data-nosnippet>55</a> ///
<a href=#56 id=56 data-nosnippet>56</a> /// A return value of `false` **does not** guarantee that a value will be
<a href=#57 id=57 data-nosnippet>57</a> /// returned from `poll_frame`.
<a href=#58 id=58 data-nosnippet>58</a> </span><span class="kw">fn </span>is_end_stream(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
<a href=#59 id=59 data-nosnippet>59</a> <span class="bool-val">false
<a href=#60 id=60 data-nosnippet>60</a> </span>}
<a href=#61 id=61 data-nosnippet>61</a>
<a href=#62 id=62 data-nosnippet>62</a> <span class="doccomment">/// Returns the bounds on the remaining length of the stream.
<a href=#63 id=63 data-nosnippet>63</a> ///
<a href=#64 id=64 data-nosnippet>64</a> /// When the **exact** remaining length of the stream is known, the upper bound will be set and
<a href=#65 id=65 data-nosnippet>65</a> /// will equal the lower bound.
<a href=#66 id=66 data-nosnippet>66</a> </span><span class="kw">fn </span>size_hint(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; SizeHint {
<a href=#67 id=67 data-nosnippet>67</a> SizeHint::default()
<a href=#68 id=68 data-nosnippet>68</a> }
<a href=#69 id=69 data-nosnippet>69</a>}
<a href=#70 id=70 data-nosnippet>70</a>
<a href=#71 id=71 data-nosnippet>71</a><span class="kw">impl</span>&lt;T: Body + Unpin + <span class="question-mark">?</span>Sized&gt; Body <span class="kw">for </span><span class="kw-2">&amp;mut </span>T {
<a href=#72 id=72 data-nosnippet>72</a> <span class="kw">type </span>Data = T::Data;
<a href=#73 id=73 data-nosnippet>73</a> <span class="kw">type </span>Error = T::Error;
<a href=#74 id=74 data-nosnippet>74</a>
<a href=#75 id=75 data-nosnippet>75</a> <span class="kw">fn </span>poll_frame(
<a href=#76 id=76 data-nosnippet>76</a> <span class="kw-2">mut </span><span class="self">self</span>: Pin&lt;<span class="kw-2">&amp;mut </span><span class="self">Self</span>&gt;,
<a href=#77 id=77 data-nosnippet>77</a> cx: <span class="kw-2">&amp;mut </span>Context&lt;<span class="lifetime">'_</span>&gt;,
<a href=#78 id=78 data-nosnippet>78</a> ) -&gt; Poll&lt;<span class="prelude-ty">Option</span>&lt;<span class="prelude-ty">Result</span>&lt;Frame&lt;<span class="self">Self</span>::Data&gt;, <span class="self">Self</span>::Error&gt;&gt;&gt; {
<a href=#79 id=79 data-nosnippet>79</a> Pin::new(<span class="kw-2">&amp;mut **</span><span class="self">self</span>).poll_frame(cx)
<a href=#80 id=80 data-nosnippet>80</a> }
<a href=#81 id=81 data-nosnippet>81</a>
<a href=#82 id=82 data-nosnippet>82</a> <span class="kw">fn </span>is_end_stream(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
<a href=#83 id=83 data-nosnippet>83</a> Pin::new(<span class="kw-2">&amp;**</span><span class="self">self</span>).is_end_stream()
<a href=#84 id=84 data-nosnippet>84</a> }
<a href=#85 id=85 data-nosnippet>85</a>
<a href=#86 id=86 data-nosnippet>86</a> <span class="kw">fn </span>size_hint(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; SizeHint {
<a href=#87 id=87 data-nosnippet>87</a> Pin::new(<span class="kw-2">&amp;**</span><span class="self">self</span>).size_hint()
<a href=#88 id=88 data-nosnippet>88</a> }
<a href=#89 id=89 data-nosnippet>89</a>}
<a href=#90 id=90 data-nosnippet>90</a>
<a href=#91 id=91 data-nosnippet>91</a><span class="kw">impl</span>&lt;P&gt; Body <span class="kw">for </span>Pin&lt;P&gt;
<a href=#92 id=92 data-nosnippet>92</a><span class="kw">where
<a href=#93 id=93 data-nosnippet>93</a> </span>P: Unpin + ops::DerefMut,
<a href=#94 id=94 data-nosnippet>94</a> P::Target: Body,
<a href=#95 id=95 data-nosnippet>95</a>{
<a href=#96 id=96 data-nosnippet>96</a> <span class="kw">type </span>Data = &lt;&lt;P <span class="kw">as </span>ops::Deref&gt;::Target <span class="kw">as </span>Body&gt;::Data;
<a href=#97 id=97 data-nosnippet>97</a> <span class="kw">type </span>Error = &lt;&lt;P <span class="kw">as </span>ops::Deref&gt;::Target <span class="kw">as </span>Body&gt;::Error;
<a href=#98 id=98 data-nosnippet>98</a>
<a href=#99 id=99 data-nosnippet>99</a> <span class="kw">fn </span>poll_frame(
<a href=#100 id=100 data-nosnippet>100</a> <span class="self">self</span>: Pin&lt;<span class="kw-2">&amp;mut </span><span class="self">Self</span>&gt;,
<a href=#101 id=101 data-nosnippet>101</a> cx: <span class="kw-2">&amp;mut </span>Context&lt;<span class="lifetime">'_</span>&gt;,
<a href=#102 id=102 data-nosnippet>102</a> ) -&gt; Poll&lt;<span class="prelude-ty">Option</span>&lt;<span class="prelude-ty">Result</span>&lt;Frame&lt;<span class="self">Self</span>::Data&gt;, <span class="self">Self</span>::Error&gt;&gt;&gt; {
<a href=#103 id=103 data-nosnippet>103</a> Pin::get_mut(<span class="self">self</span>).as_mut().poll_frame(cx)
<a href=#104 id=104 data-nosnippet>104</a> }
<a href=#105 id=105 data-nosnippet>105</a>
<a href=#106 id=106 data-nosnippet>106</a> <span class="kw">fn </span>is_end_stream(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
<a href=#107 id=107 data-nosnippet>107</a> <span class="self">self</span>.as_ref().is_end_stream()
<a href=#108 id=108 data-nosnippet>108</a> }
<a href=#109 id=109 data-nosnippet>109</a>
<a href=#110 id=110 data-nosnippet>110</a> <span class="kw">fn </span>size_hint(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; SizeHint {
<a href=#111 id=111 data-nosnippet>111</a> <span class="self">self</span>.as_ref().size_hint()
<a href=#112 id=112 data-nosnippet>112</a> }
<a href=#113 id=113 data-nosnippet>113</a>}
<a href=#114 id=114 data-nosnippet>114</a>
<a href=#115 id=115 data-nosnippet>115</a><span class="kw">impl</span>&lt;T: Body + Unpin + <span class="question-mark">?</span>Sized&gt; Body <span class="kw">for </span>Box&lt;T&gt; {
<a href=#116 id=116 data-nosnippet>116</a> <span class="kw">type </span>Data = T::Data;
<a href=#117 id=117 data-nosnippet>117</a> <span class="kw">type </span>Error = T::Error;
<a href=#118 id=118 data-nosnippet>118</a>
<a href=#119 id=119 data-nosnippet>119</a> <span class="kw">fn </span>poll_frame(
<a href=#120 id=120 data-nosnippet>120</a> <span class="kw-2">mut </span><span class="self">self</span>: Pin&lt;<span class="kw-2">&amp;mut </span><span class="self">Self</span>&gt;,
<a href=#121 id=121 data-nosnippet>121</a> cx: <span class="kw-2">&amp;mut </span>Context&lt;<span class="lifetime">'_</span>&gt;,
<a href=#122 id=122 data-nosnippet>122</a> ) -&gt; Poll&lt;<span class="prelude-ty">Option</span>&lt;<span class="prelude-ty">Result</span>&lt;Frame&lt;<span class="self">Self</span>::Data&gt;, <span class="self">Self</span>::Error&gt;&gt;&gt; {
<a href=#123 id=123 data-nosnippet>123</a> Pin::new(<span class="kw-2">&amp;mut **</span><span class="self">self</span>).poll_frame(cx)
<a href=#124 id=124 data-nosnippet>124</a> }
<a href=#125 id=125 data-nosnippet>125</a>
<a href=#126 id=126 data-nosnippet>126</a> <span class="kw">fn </span>is_end_stream(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
<a href=#127 id=127 data-nosnippet>127</a> <span class="self">self</span>.as_ref().is_end_stream()
<a href=#128 id=128 data-nosnippet>128</a> }
<a href=#129 id=129 data-nosnippet>129</a>
<a href=#130 id=130 data-nosnippet>130</a> <span class="kw">fn </span>size_hint(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; SizeHint {
<a href=#131 id=131 data-nosnippet>131</a> <span class="self">self</span>.as_ref().size_hint()
<a href=#132 id=132 data-nosnippet>132</a> }
<a href=#133 id=133 data-nosnippet>133</a>}
<a href=#134 id=134 data-nosnippet>134</a>
<a href=#135 id=135 data-nosnippet>135</a><span class="kw">impl</span>&lt;B: Body&gt; Body <span class="kw">for </span>http::Request&lt;B&gt; {
<a href=#136 id=136 data-nosnippet>136</a> <span class="kw">type </span>Data = B::Data;
<a href=#137 id=137 data-nosnippet>137</a> <span class="kw">type </span>Error = B::Error;
<a href=#138 id=138 data-nosnippet>138</a>
<a href=#139 id=139 data-nosnippet>139</a> <span class="kw">fn </span>poll_frame(
<a href=#140 id=140 data-nosnippet>140</a> <span class="self">self</span>: Pin&lt;<span class="kw-2">&amp;mut </span><span class="self">Self</span>&gt;,
<a href=#141 id=141 data-nosnippet>141</a> cx: <span class="kw-2">&amp;mut </span>Context&lt;<span class="lifetime">'_</span>&gt;,
<a href=#142 id=142 data-nosnippet>142</a> ) -&gt; Poll&lt;<span class="prelude-ty">Option</span>&lt;<span class="prelude-ty">Result</span>&lt;Frame&lt;<span class="self">Self</span>::Data&gt;, <span class="self">Self</span>::Error&gt;&gt;&gt; {
<a href=#143 id=143 data-nosnippet>143</a> <span class="comment">// SAFETY:
<a href=#144 id=144 data-nosnippet>144</a> // A pin projection.
<a href=#145 id=145 data-nosnippet>145</a> </span><span class="kw">unsafe </span>{
<a href=#146 id=146 data-nosnippet>146</a> <span class="self">self</span>.map_unchecked_mut(http::Request::body_mut)
<a href=#147 id=147 data-nosnippet>147</a> .poll_frame(cx)
<a href=#148 id=148 data-nosnippet>148</a> }
<a href=#149 id=149 data-nosnippet>149</a> }
<a href=#150 id=150 data-nosnippet>150</a>
<a href=#151 id=151 data-nosnippet>151</a> <span class="kw">fn </span>is_end_stream(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
<a href=#152 id=152 data-nosnippet>152</a> <span class="self">self</span>.body().is_end_stream()
<a href=#153 id=153 data-nosnippet>153</a> }
<a href=#154 id=154 data-nosnippet>154</a>
<a href=#155 id=155 data-nosnippet>155</a> <span class="kw">fn </span>size_hint(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; SizeHint {
<a href=#156 id=156 data-nosnippet>156</a> <span class="self">self</span>.body().size_hint()
<a href=#157 id=157 data-nosnippet>157</a> }
<a href=#158 id=158 data-nosnippet>158</a>}
<a href=#159 id=159 data-nosnippet>159</a>
<a href=#160 id=160 data-nosnippet>160</a><span class="kw">impl</span>&lt;B: Body&gt; Body <span class="kw">for </span>http::Response&lt;B&gt; {
<a href=#161 id=161 data-nosnippet>161</a> <span class="kw">type </span>Data = B::Data;
<a href=#162 id=162 data-nosnippet>162</a> <span class="kw">type </span>Error = B::Error;
<a href=#163 id=163 data-nosnippet>163</a>
<a href=#164 id=164 data-nosnippet>164</a> <span class="kw">fn </span>poll_frame(
<a href=#165 id=165 data-nosnippet>165</a> <span class="self">self</span>: Pin&lt;<span class="kw-2">&amp;mut </span><span class="self">Self</span>&gt;,
<a href=#166 id=166 data-nosnippet>166</a> cx: <span class="kw-2">&amp;mut </span>Context&lt;<span class="lifetime">'_</span>&gt;,
<a href=#167 id=167 data-nosnippet>167</a> ) -&gt; Poll&lt;<span class="prelude-ty">Option</span>&lt;<span class="prelude-ty">Result</span>&lt;Frame&lt;<span class="self">Self</span>::Data&gt;, <span class="self">Self</span>::Error&gt;&gt;&gt; {
<a href=#168 id=168 data-nosnippet>168</a> <span class="comment">// SAFETY:
<a href=#169 id=169 data-nosnippet>169</a> // A pin projection.
<a href=#170 id=170 data-nosnippet>170</a> </span><span class="kw">unsafe </span>{
<a href=#171 id=171 data-nosnippet>171</a> <span class="self">self</span>.map_unchecked_mut(http::Response::body_mut)
<a href=#172 id=172 data-nosnippet>172</a> .poll_frame(cx)
<a href=#173 id=173 data-nosnippet>173</a> }
<a href=#174 id=174 data-nosnippet>174</a> }
<a href=#175 id=175 data-nosnippet>175</a>
<a href=#176 id=176 data-nosnippet>176</a> <span class="kw">fn </span>is_end_stream(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
<a href=#177 id=177 data-nosnippet>177</a> <span class="self">self</span>.body().is_end_stream()
<a href=#178 id=178 data-nosnippet>178</a> }
<a href=#179 id=179 data-nosnippet>179</a>
<a href=#180 id=180 data-nosnippet>180</a> <span class="kw">fn </span>size_hint(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; SizeHint {
<a href=#181 id=181 data-nosnippet>181</a> <span class="self">self</span>.body().size_hint()
<a href=#182 id=182 data-nosnippet>182</a> }
<a href=#183 id=183 data-nosnippet>183</a>}
<a href=#184 id=184 data-nosnippet>184</a>
<a href=#185 id=185 data-nosnippet>185</a><span class="kw">impl </span>Body <span class="kw">for </span>String {
<a href=#186 id=186 data-nosnippet>186</a> <span class="kw">type </span>Data = Bytes;
<a href=#187 id=187 data-nosnippet>187</a> <span class="kw">type </span>Error = Infallible;
<a href=#188 id=188 data-nosnippet>188</a>
<a href=#189 id=189 data-nosnippet>189</a> <span class="kw">fn </span>poll_frame(
<a href=#190 id=190 data-nosnippet>190</a> <span class="kw-2">mut </span><span class="self">self</span>: Pin&lt;<span class="kw-2">&amp;mut </span><span class="self">Self</span>&gt;,
<a href=#191 id=191 data-nosnippet>191</a> _cx: <span class="kw-2">&amp;mut </span>Context&lt;<span class="lifetime">'_</span>&gt;,
<a href=#192 id=192 data-nosnippet>192</a> ) -&gt; Poll&lt;<span class="prelude-ty">Option</span>&lt;<span class="prelude-ty">Result</span>&lt;Frame&lt;<span class="self">Self</span>::Data&gt;, <span class="self">Self</span>::Error&gt;&gt;&gt; {
<a href=#193 id=193 data-nosnippet>193</a> <span class="kw">if </span>!<span class="self">self</span>.is_empty() {
<a href=#194 id=194 data-nosnippet>194</a> <span class="kw">let </span>s = std::mem::take(<span class="kw-2">&amp;mut *</span><span class="self">self</span>);
<a href=#195 id=195 data-nosnippet>195</a> Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(Frame::data(s.into_bytes().into()))))
<a href=#196 id=196 data-nosnippet>196</a> } <span class="kw">else </span>{
<a href=#197 id=197 data-nosnippet>197</a> Poll::Ready(<span class="prelude-val">None</span>)
<a href=#198 id=198 data-nosnippet>198</a> }
<a href=#199 id=199 data-nosnippet>199</a> }
<a href=#200 id=200 data-nosnippet>200</a>
<a href=#201 id=201 data-nosnippet>201</a> <span class="kw">fn </span>is_end_stream(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
<a href=#202 id=202 data-nosnippet>202</a> <span class="self">self</span>.is_empty()
<a href=#203 id=203 data-nosnippet>203</a> }
<a href=#204 id=204 data-nosnippet>204</a>
<a href=#205 id=205 data-nosnippet>205</a> <span class="kw">fn </span>size_hint(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; SizeHint {
<a href=#206 id=206 data-nosnippet>206</a> SizeHint::with_exact(<span class="self">self</span>.len() <span class="kw">as </span>u64)
<a href=#207 id=207 data-nosnippet>207</a> }
<a href=#208 id=208 data-nosnippet>208</a>}
<a href=#209 id=209 data-nosnippet>209</a>
<a href=#210 id=210 data-nosnippet>210</a><span class="attr">#[cfg(test)]
<a href=#211 id=211 data-nosnippet>211</a></span><span class="kw">fn </span>_assert_bounds() {
<a href=#212 id=212 data-nosnippet>212</a> <span class="kw">fn </span>can_be_trait_object(<span class="kw">_</span>: <span class="kw-2">&amp;</span><span class="kw">dyn </span>Body&lt;Data = std::io::Cursor&lt;Vec&lt;u8&gt;&gt;, Error = std::io::Error&gt;) {}
<a href=#213 id=213 data-nosnippet>213</a>}
</code></pre></div></section></main></body></html>
@@ -0,0 +1,85 @@
<!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 `/home/newkirk/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/http-body-1.0.1/src/size_hint.rs`."><title>size_hint.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="http_body" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="../../static.files/src-script-813739b1.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">http_body/</div>size_hint.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-2"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">/// A `Body` size hint
<a href=#2 id=2 data-nosnippet>2</a>///
<a href=#3 id=3 data-nosnippet>3</a>/// The default implementation returns:
<a href=#4 id=4 data-nosnippet>4</a>///
<a href=#5 id=5 data-nosnippet>5</a>/// * 0 for `lower`
<a href=#6 id=6 data-nosnippet>6</a>/// * `None` for `upper`.
<a href=#7 id=7 data-nosnippet>7</a></span><span class="attr">#[derive(Debug, Default, Clone)]
<a href=#8 id=8 data-nosnippet>8</a></span><span class="kw">pub struct </span>SizeHint {
<a href=#9 id=9 data-nosnippet>9</a> lower: u64,
<a href=#10 id=10 data-nosnippet>10</a> upper: <span class="prelude-ty">Option</span>&lt;u64&gt;,
<a href=#11 id=11 data-nosnippet>11</a>}
<a href=#12 id=12 data-nosnippet>12</a>
<a href=#13 id=13 data-nosnippet>13</a><span class="kw">impl </span>SizeHint {
<a href=#14 id=14 data-nosnippet>14</a> <span class="doccomment">/// Returns a new `SizeHint` with default values
<a href=#15 id=15 data-nosnippet>15</a> </span><span class="attr">#[inline]
<a href=#16 id=16 data-nosnippet>16</a> </span><span class="kw">pub fn </span>new() -&gt; SizeHint {
<a href=#17 id=17 data-nosnippet>17</a> SizeHint::default()
<a href=#18 id=18 data-nosnippet>18</a> }
<a href=#19 id=19 data-nosnippet>19</a>
<a href=#20 id=20 data-nosnippet>20</a> <span class="doccomment">/// Returns a new `SizeHint` with both upper and lower bounds set to the
<a href=#21 id=21 data-nosnippet>21</a> /// given value.
<a href=#22 id=22 data-nosnippet>22</a> </span><span class="attr">#[inline]
<a href=#23 id=23 data-nosnippet>23</a> </span><span class="kw">pub fn </span>with_exact(value: u64) -&gt; SizeHint {
<a href=#24 id=24 data-nosnippet>24</a> SizeHint {
<a href=#25 id=25 data-nosnippet>25</a> lower: value,
<a href=#26 id=26 data-nosnippet>26</a> upper: <span class="prelude-val">Some</span>(value),
<a href=#27 id=27 data-nosnippet>27</a> }
<a href=#28 id=28 data-nosnippet>28</a> }
<a href=#29 id=29 data-nosnippet>29</a>
<a href=#30 id=30 data-nosnippet>30</a> <span class="doccomment">/// Returns the lower bound of data that the `Body` will yield before
<a href=#31 id=31 data-nosnippet>31</a> /// completing.
<a href=#32 id=32 data-nosnippet>32</a> </span><span class="attr">#[inline]
<a href=#33 id=33 data-nosnippet>33</a> </span><span class="kw">pub fn </span>lower(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u64 {
<a href=#34 id=34 data-nosnippet>34</a> <span class="self">self</span>.lower
<a href=#35 id=35 data-nosnippet>35</a> }
<a href=#36 id=36 data-nosnippet>36</a>
<a href=#37 id=37 data-nosnippet>37</a> <span class="doccomment">/// Set the value of the `lower` hint.
<a href=#38 id=38 data-nosnippet>38</a> ///
<a href=#39 id=39 data-nosnippet>39</a> /// # Panics
<a href=#40 id=40 data-nosnippet>40</a> ///
<a href=#41 id=41 data-nosnippet>41</a> /// The function panics if `value` is greater than `upper`.
<a href=#42 id=42 data-nosnippet>42</a> </span><span class="attr">#[inline]
<a href=#43 id=43 data-nosnippet>43</a> </span><span class="kw">pub fn </span>set_lower(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: u64) {
<a href=#44 id=44 data-nosnippet>44</a> <span class="macro">assert!</span>(value &lt;= <span class="self">self</span>.upper.unwrap_or(u64::MAX));
<a href=#45 id=45 data-nosnippet>45</a> <span class="self">self</span>.lower = value;
<a href=#46 id=46 data-nosnippet>46</a> }
<a href=#47 id=47 data-nosnippet>47</a>
<a href=#48 id=48 data-nosnippet>48</a> <span class="doccomment">/// Returns the upper bound of data the `Body` will yield before
<a href=#49 id=49 data-nosnippet>49</a> /// completing, or `None` if the value is unknown.
<a href=#50 id=50 data-nosnippet>50</a> </span><span class="attr">#[inline]
<a href=#51 id=51 data-nosnippet>51</a> </span><span class="kw">pub fn </span>upper(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;u64&gt; {
<a href=#52 id=52 data-nosnippet>52</a> <span class="self">self</span>.upper
<a href=#53 id=53 data-nosnippet>53</a> }
<a href=#54 id=54 data-nosnippet>54</a>
<a href=#55 id=55 data-nosnippet>55</a> <span class="doccomment">/// Set the value of the `upper` hint value.
<a href=#56 id=56 data-nosnippet>56</a> ///
<a href=#57 id=57 data-nosnippet>57</a> /// # Panics
<a href=#58 id=58 data-nosnippet>58</a> ///
<a href=#59 id=59 data-nosnippet>59</a> /// This function panics if `value` is less than `lower`.
<a href=#60 id=60 data-nosnippet>60</a> </span><span class="attr">#[inline]
<a href=#61 id=61 data-nosnippet>61</a> </span><span class="kw">pub fn </span>set_upper(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: u64) {
<a href=#62 id=62 data-nosnippet>62</a> <span class="macro">assert!</span>(value &gt;= <span class="self">self</span>.lower, <span class="string">"`value` is less than than `lower`"</span>);
<a href=#63 id=63 data-nosnippet>63</a>
<a href=#64 id=64 data-nosnippet>64</a> <span class="self">self</span>.upper = <span class="prelude-val">Some</span>(value);
<a href=#65 id=65 data-nosnippet>65</a> }
<a href=#66 id=66 data-nosnippet>66</a>
<a href=#67 id=67 data-nosnippet>67</a> <span class="doccomment">/// Returns the exact size of data that will be yielded **if** the
<a href=#68 id=68 data-nosnippet>68</a> /// `lower` and `upper` bounds are equal.
<a href=#69 id=69 data-nosnippet>69</a> </span><span class="attr">#[inline]
<a href=#70 id=70 data-nosnippet>70</a> </span><span class="kw">pub fn </span>exact(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;u64&gt; {
<a href=#71 id=71 data-nosnippet>71</a> <span class="kw">if </span><span class="prelude-val">Some</span>(<span class="self">self</span>.lower) == <span class="self">self</span>.upper {
<a href=#72 id=72 data-nosnippet>72</a> <span class="self">self</span>.upper
<a href=#73 id=73 data-nosnippet>73</a> } <span class="kw">else </span>{
<a href=#74 id=74 data-nosnippet>74</a> <span class="prelude-val">None
<a href=#75 id=75 data-nosnippet>75</a> </span>}
<a href=#76 id=76 data-nosnippet>76</a> }
<a href=#77 id=77 data-nosnippet>77</a>
<a href=#78 id=78 data-nosnippet>78</a> <span class="doccomment">/// Set the value of the `lower` and `upper` bounds to exactly the same.
<a href=#79 id=79 data-nosnippet>79</a> </span><span class="attr">#[inline]
<a href=#80 id=80 data-nosnippet>80</a> </span><span class="kw">pub fn </span>set_exact(<span class="kw-2">&amp;mut </span><span class="self">self</span>, value: u64) {
<a href=#81 id=81 data-nosnippet>81</a> <span class="self">self</span>.lower = value;
<a href=#82 id=82 data-nosnippet>82</a> <span class="self">self</span>.upper = <span class="prelude-val">Some</span>(value);
<a href=#83 id=83 data-nosnippet>83</a> }
<a href=#84 id=84 data-nosnippet>84</a>}
</code></pre></div></section></main></body></html>