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</pre><pre class="rust"><code><span class="doccomment">//! A format item with owned data.
</span><span class="kw">use </span>alloc::boxed::Box;
<span class="kw">use </span>alloc::string::String;
<span class="kw">use </span>alloc::vec::Vec;
<span class="kw">use </span>core::fmt;
<span class="kw">use </span><span class="kw">crate</span>::error;
<span class="kw">use </span><span class="kw">crate</span>::format_description::{Component, FormatItem};
<span class="doccomment">/// A complete description of how to format and parse a type.
</span><span class="attribute">#[non_exhaustive]
#[derive(Clone, PartialEq, Eq)]
</span><span class="kw">pub enum </span>OwnedFormatItem {
<span class="doccomment">/// Bytes that are formatted as-is.
///
/// **Note**: If you call the `format` method that returns a `String`, these bytes will be
/// passed through `String::from_utf8_lossy`.
</span>Literal(Box&lt;[u8]&gt;),
<span class="doccomment">/// A minimal representation of a single non-literal item.
</span>Component(Component),
<span class="doccomment">/// A series of literals or components that collectively form a partial or complete
/// description.
</span>Compound(Box&lt;[<span class="self">Self</span>]&gt;),
<span class="doccomment">/// A `FormatItem` that may or may not be present when parsing. If parsing fails, there
/// will be no effect on the resulting `struct`.
///
/// This variant has no effect on formatting, as the value is guaranteed to be present.
</span>Optional(Box&lt;<span class="self">Self</span>&gt;),
<span class="doccomment">/// A series of `FormatItem`s where, when parsing, the first successful parse is used. When
/// formatting, the first element of the [`Vec`] is used. An empty [`Vec`] is a no-op when
/// formatting or parsing.
</span>First(Box&lt;[<span class="self">Self</span>]&gt;),
}
<span class="kw">impl </span>fmt::Debug <span class="kw">for </span>OwnedFormatItem {
<span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter&lt;<span class="lifetime">&#39;_</span>&gt;) -&gt; fmt::Result {
<span class="kw">match </span><span class="self">self </span>{
<span class="self">Self</span>::Literal(literal) =&gt; f.write_str(<span class="kw-2">&amp;</span>String::from_utf8_lossy(literal)),
<span class="self">Self</span>::Component(component) =&gt; component.fmt(f),
<span class="self">Self</span>::Compound(compound) =&gt; compound.fmt(f),
<span class="self">Self</span>::Optional(item) =&gt; f.debug_tuple(<span class="string">&quot;Optional&quot;</span>).field(item).finish(),
<span class="self">Self</span>::First(items) =&gt; f.debug_tuple(<span class="string">&quot;First&quot;</span>).field(items).finish(),
}
}
}
<span class="comment">// region: conversions from FormatItem
</span><span class="kw">impl </span>From&lt;FormatItem&lt;<span class="lifetime">&#39;_</span>&gt;&gt; <span class="kw">for </span>OwnedFormatItem {
<span class="kw">fn </span>from(item: FormatItem&lt;<span class="lifetime">&#39;_</span>&gt;) -&gt; <span class="self">Self </span>{
(<span class="kw-2">&amp;</span>item).into()
}
}
<span class="kw">impl </span>From&lt;<span class="kw-2">&amp;</span>FormatItem&lt;<span class="lifetime">&#39;_</span>&gt;&gt; <span class="kw">for </span>OwnedFormatItem {
<span class="kw">fn </span>from(item: <span class="kw-2">&amp;</span>FormatItem&lt;<span class="lifetime">&#39;_</span>&gt;) -&gt; <span class="self">Self </span>{
<span class="kw">match </span>item {
FormatItem::Literal(literal) =&gt; <span class="self">Self</span>::Literal(literal.to_vec().into_boxed_slice()),
FormatItem::Component(component) =&gt; <span class="self">Self</span>::Component(<span class="kw-2">*</span>component),
FormatItem::Compound(compound) =&gt; <span class="self">Self</span>::Compound(
compound
.iter()
.cloned()
.map(Into::into)
.collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;()
.into_boxed_slice(),
),
FormatItem::Optional(item) =&gt; <span class="self">Self</span>::Optional(Box::new((<span class="kw-2">*</span>item).into())),
FormatItem::First(items) =&gt; <span class="self">Self</span>::First(
items
.iter()
.cloned()
.map(Into::into)
.collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;()
.into_boxed_slice(),
),
}
}
}
<span class="kw">impl </span>From&lt;Vec&lt;FormatItem&lt;<span class="lifetime">&#39;_</span>&gt;&gt;&gt; <span class="kw">for </span>OwnedFormatItem {
<span class="kw">fn </span>from(items: Vec&lt;FormatItem&lt;<span class="lifetime">&#39;_</span>&gt;&gt;) -&gt; <span class="self">Self </span>{
items.as_slice().into()
}
}
<span class="kw">impl</span>&lt;<span class="lifetime">&#39;a</span>, T: AsRef&lt;[FormatItem&lt;<span class="lifetime">&#39;a</span>&gt;]&gt; + <span class="question-mark">?</span>Sized&gt; From&lt;<span class="kw-2">&amp;</span>T&gt; <span class="kw">for </span>OwnedFormatItem {
<span class="kw">fn </span>from(items: <span class="kw-2">&amp;</span>T) -&gt; <span class="self">Self </span>{
<span class="self">Self</span>::Compound(
items
.as_ref()
.iter()
.cloned()
.map(Into::into)
.collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;()
.into_boxed_slice(),
)
}
}
<span class="comment">// endregion conversions from FormatItem
// region: from variants
</span><span class="kw">impl </span>From&lt;Component&gt; <span class="kw">for </span>OwnedFormatItem {
<span class="kw">fn </span>from(component: Component) -&gt; <span class="self">Self </span>{
<span class="self">Self</span>::Component(component)
}
}
<span class="kw">impl </span>TryFrom&lt;OwnedFormatItem&gt; <span class="kw">for </span>Component {
<span class="kw">type </span>Error = error::DifferentVariant;
<span class="kw">fn </span>try_from(value: OwnedFormatItem) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, <span class="self">Self</span>::Error&gt; {
<span class="kw">match </span>value {
OwnedFormatItem::Component(component) =&gt; <span class="prelude-val">Ok</span>(component),
<span class="kw">_ </span>=&gt; <span class="prelude-val">Err</span>(error::DifferentVariant),
}
}
}
<span class="kw">impl </span>From&lt;Vec&lt;<span class="self">Self</span>&gt;&gt; <span class="kw">for </span>OwnedFormatItem {
<span class="kw">fn </span>from(items: Vec&lt;<span class="self">Self</span>&gt;) -&gt; <span class="self">Self </span>{
<span class="self">Self</span>::Compound(items.into_boxed_slice())
}
}
<span class="kw">impl </span>TryFrom&lt;OwnedFormatItem&gt; <span class="kw">for </span>Vec&lt;OwnedFormatItem&gt; {
<span class="kw">type </span>Error = error::DifferentVariant;
<span class="kw">fn </span>try_from(value: OwnedFormatItem) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, <span class="self">Self</span>::Error&gt; {
<span class="kw">match </span>value {
OwnedFormatItem::Compound(items) =&gt; <span class="prelude-val">Ok</span>(items.into_vec()),
<span class="kw">_ </span>=&gt; <span class="prelude-val">Err</span>(error::DifferentVariant),
}
}
}
<span class="comment">// endregion from variants
// region: equality
</span><span class="kw">impl </span>PartialEq&lt;Component&gt; <span class="kw">for </span>OwnedFormatItem {
<span class="kw">fn </span>eq(<span class="kw-2">&amp;</span><span class="self">self</span>, rhs: <span class="kw-2">&amp;</span>Component) -&gt; bool {
<span class="macro">matches!</span>(<span class="self">self</span>, <span class="self">Self</span>::Component(component) <span class="kw">if </span>component == rhs)
}
}
<span class="kw">impl </span>PartialEq&lt;OwnedFormatItem&gt; <span class="kw">for </span>Component {
<span class="kw">fn </span>eq(<span class="kw-2">&amp;</span><span class="self">self</span>, rhs: <span class="kw-2">&amp;</span>OwnedFormatItem) -&gt; bool {
rhs == <span class="self">self
</span>}
}
<span class="kw">impl </span>PartialEq&lt;<span class="kw-2">&amp;</span>[<span class="self">Self</span>]&gt; <span class="kw">for </span>OwnedFormatItem {
<span class="kw">fn </span>eq(<span class="kw-2">&amp;</span><span class="self">self</span>, rhs: &amp;&amp;[<span class="self">Self</span>]) -&gt; bool {
<span class="macro">matches!</span>(<span class="self">self</span>, <span class="self">Self</span>::Compound(compound) <span class="kw">if </span>&amp;&amp;<span class="kw-2">**</span>compound == rhs)
}
}
<span class="kw">impl </span>PartialEq&lt;OwnedFormatItem&gt; <span class="kw">for </span><span class="kw-2">&amp;</span>[OwnedFormatItem] {
<span class="kw">fn </span>eq(<span class="kw-2">&amp;</span><span class="self">self</span>, rhs: <span class="kw-2">&amp;</span>OwnedFormatItem) -&gt; bool {
rhs == <span class="self">self
</span>}
}
<span class="comment">// endregion equality
</span></code></pre></div>
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