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<section id='main' class="content"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class="rust ">
<span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>;
<span class="doccomment">/// Represents lifetimes and type parameters attached to a declaration</span>
<span class="doccomment">/// of a function, enum, trait, etc.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Default</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Generics</span> {
<span class="kw">pub</span> <span class="ident">lifetimes</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">LifetimeDef</span><span class="op">></span>,
<span class="kw">pub</span> <span class="ident">ty_params</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">TyParam</span><span class="op">></span>,
<span class="kw">pub</span> <span class="ident">where_clause</span>: <span class="ident">WhereClause</span>,
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span>
<span class="doccomment">/// Returned by `Generics::split_for_impl`.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ImplGenerics</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Generics</span>);
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span>
<span class="doccomment">/// Returned by `Generics::split_for_impl`.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">TyGenerics</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Generics</span>);
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span>
<span class="doccomment">/// Returned by `TyGenerics::as_turbofish`.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Turbofish</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Generics</span>);
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span>
<span class="kw">impl</span> <span class="ident">Generics</span> {
<span class="doccomment">/// Split a type's generics into the pieces required for impl'ing a trait</span>
<span class="doccomment">/// for that type.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// # extern crate syn;</span>
<span class="doccomment">/// # #[macro_use]</span>
<span class="doccomment">/// # extern crate quote;</span>
<span class="doccomment">/// # fn main() {</span>
<span class="doccomment">/// # let generics: syn::Generics = Default::default();</span>
<span class="doccomment">/// # let name = syn::Ident::new("MyType");</span>
<span class="doccomment">/// let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();</span>
<span class="doccomment">/// quote! {</span>
<span class="doccomment">/// impl #impl_generics MyTrait for #name #ty_generics #where_clause {</span>
<span class="doccomment">/// // ...</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// # ;</span>
<span class="doccomment">/// # }</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">split_for_impl</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">ImplGenerics</span>, <span class="ident">TyGenerics</span>, <span class="kw-2">&</span><span class="ident">WhereClause</span>) {
(<span class="ident">ImplGenerics</span>(<span class="self">self</span>), <span class="ident">TyGenerics</span>(<span class="self">self</span>), <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">where_clause</span>)
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">TyGenerics</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="doccomment">/// Turn a type's generics like `<X, Y>` into a turbofish like `::<X, Y>`.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_turbofish</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Turbofish</span> {
<span class="ident">Turbofish</span>(<span class="self">self</span>.<span class="number">0</span>)
}
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Hash</span>, <span class="ident">Ord</span>, <span class="ident">PartialOrd</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Lifetime</span> {
<span class="kw">pub</span> <span class="ident">ident</span>: <span class="ident">Ident</span>,
}
<span class="kw">impl</span> <span class="ident">Lifetime</span> {
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">Ident</span><span class="op">>></span>(<span class="ident">t</span>: <span class="ident">T</span>) <span class="op">-></span> <span class="self">Self</span> {
<span class="kw">let</span> <span class="ident">id</span> <span class="op">=</span> <span class="ident">Ident</span>::<span class="ident">new</span>(<span class="ident">t</span>);
<span class="kw">if</span> <span class="op">!</span><span class="ident">id</span>.<span class="ident">as_ref</span>().<span class="ident">starts_with</span>(<span class="string">'\''</span>) {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"lifetime name must start with apostrophe as in \"'a\", \
got {:?}"</span>,
<span class="ident">id</span>.<span class="ident">as_ref</span>());
}
<span class="ident">Lifetime</span> { <span class="ident">ident</span>: <span class="ident">id</span> }
}
}
<span class="doccomment">/// A lifetime definition, e.g. `'a: 'b+'c+'d`</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">LifetimeDef</span> {
<span class="kw">pub</span> <span class="ident">attrs</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Attribute</span><span class="op">></span>,
<span class="kw">pub</span> <span class="ident">lifetime</span>: <span class="ident">Lifetime</span>,
<span class="kw">pub</span> <span class="ident">bounds</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Lifetime</span><span class="op">></span>,
}
<span class="kw">impl</span> <span class="ident">LifetimeDef</span> {
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">Ident</span><span class="op">>></span>(<span class="ident">t</span>: <span class="ident">T</span>) <span class="op">-></span> <span class="self">Self</span> {
<span class="ident">LifetimeDef</span> {
<span class="ident">attrs</span>: <span class="ident">Vec</span>::<span class="ident">new</span>(),
<span class="ident">lifetime</span>: <span class="ident">Lifetime</span>::<span class="ident">new</span>(<span class="ident">t</span>),
<span class="ident">bounds</span>: <span class="ident">Vec</span>::<span class="ident">new</span>(),
}
}
}
<span class="doccomment">/// A generic type parameter, e.g. `T: Into<String>`.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">TyParam</span> {
<span class="kw">pub</span> <span class="ident">attrs</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Attribute</span><span class="op">></span>,
<span class="kw">pub</span> <span class="ident">ident</span>: <span class="ident">Ident</span>,
<span class="kw">pub</span> <span class="ident">bounds</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">TyParamBound</span><span class="op">></span>,
<span class="kw">pub</span> <span class="ident">default</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Ty</span><span class="op">></span>,
}
<span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">Ident</span><span class="op">></span> <span class="kw">for</span> <span class="ident">TyParam</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">ident</span>: <span class="ident">Ident</span>) <span class="op">-></span> <span class="self">Self</span> {
<span class="ident">TyParam</span> {
<span class="ident">attrs</span>: <span class="macro">vec</span><span class="macro">!</span>[],
<span class="ident">ident</span>: <span class="ident">ident</span>,
<span class="ident">bounds</span>: <span class="macro">vec</span><span class="macro">!</span>[],
<span class="ident">default</span>: <span class="prelude-val">None</span>,
}
}
}
<span class="doccomment">/// The AST represents all type param bounds as types.</span>
<span class="doccomment">/// `typeck::collect::compute_bounds` matches these against</span>
<span class="doccomment">/// the "special" built-in traits (see `middle::lang_items`) and</span>
<span class="doccomment">/// detects Copy, Send and Sync.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">TyParamBound</span> {
<span class="ident">Trait</span>(<span class="ident">PolyTraitRef</span>, <span class="ident">TraitBoundModifier</span>),
<span class="ident">Region</span>(<span class="ident">Lifetime</span>),
}
<span class="doccomment">/// A modifier on a bound, currently this is only used for `?Sized`, where the</span>
<span class="doccomment">/// modifier is `Maybe`. Negative bounds should also be handled here.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Copy</span>, <span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">TraitBoundModifier</span> {
<span class="prelude-val">None</span>,
<span class="ident">Maybe</span>,
}
<span class="doccomment">/// A `where` clause in a definition</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Default</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">WhereClause</span> {
<span class="kw">pub</span> <span class="ident">predicates</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">WherePredicate</span><span class="op">></span>,
}
<span class="kw">impl</span> <span class="ident">WhereClause</span> {
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">none</span>() <span class="op">-></span> <span class="self">Self</span> {
<span class="ident">WhereClause</span> { <span class="ident">predicates</span>: <span class="ident">Vec</span>::<span class="ident">new</span>() }
}
}
<span class="doccomment">/// A single predicate in a `where` clause</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">WherePredicate</span> {
<span class="doccomment">/// A type binding, e.g. `for<'c> Foo: Send+Clone+'c`</span>
<span class="ident">BoundPredicate</span>(<span class="ident">WhereBoundPredicate</span>),
<span class="doccomment">/// A lifetime predicate, e.g. `'a: 'b+'c`</span>
<span class="ident">RegionPredicate</span>(<span class="ident">WhereRegionPredicate</span>),
<span class="doccomment">/// An equality predicate (unsupported)</span>
<span class="ident">EqPredicate</span>(<span class="ident">WhereEqPredicate</span>),
}
<span class="doccomment">/// A type bound.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// E.g. `for<'c> Foo: Send+Clone+'c`</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">WhereBoundPredicate</span> {
<span class="doccomment">/// Any lifetimes from a `for` binding</span>
<span class="kw">pub</span> <span class="ident">bound_lifetimes</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">LifetimeDef</span><span class="op">></span>,
<span class="doccomment">/// The type being bounded</span>
<span class="kw">pub</span> <span class="ident">bounded_ty</span>: <span class="ident">Ty</span>,
<span class="doccomment">/// Trait and lifetime bounds (`Clone+Send+'static`)</span>
<span class="kw">pub</span> <span class="ident">bounds</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">TyParamBound</span><span class="op">></span>,
}
<span class="doccomment">/// A lifetime predicate.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// E.g. `'a: 'b+'c`</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">WhereRegionPredicate</span> {
<span class="kw">pub</span> <span class="ident">lifetime</span>: <span class="ident">Lifetime</span>,
<span class="kw">pub</span> <span class="ident">bounds</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Lifetime</span><span class="op">></span>,
}
<span class="doccomment">/// An equality predicate (unsupported).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// E.g. `T=int`</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">WhereEqPredicate</span> {
<span class="kw">pub</span> <span class="ident">lhs_ty</span>: <span class="ident">Ty</span>,
<span class="kw">pub</span> <span class="ident">rhs_ty</span>: <span class="ident">Ty</span>,
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">parsing</span> {
<span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">attr</span>::<span class="ident">parsing</span>::<span class="ident">outer_attr</span>;
<span class="kw">use</span> <span class="ident">ident</span>::<span class="ident">parsing</span>::<span class="ident">ident</span>;
<span class="kw">use</span> <span class="ident">ty</span>::<span class="ident">parsing</span>::{<span class="ident">ty</span>, <span class="ident">poly_trait_ref</span>};
<span class="macro">named</span><span class="macro">!</span>(<span class="kw">pub</span> <span class="ident">generics</span> <span class="op">-></span> <span class="ident">Generics</span>, <span class="macro">map</span><span class="macro">!</span>(
<span class="macro">alt</span><span class="macro">!</span>(
<span class="macro">do_parse</span><span class="macro">!</span>(
<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"<"</span>) <span class="op">>></span>
<span class="ident">lifetimes</span>: <span class="macro">separated_list</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">","</span>), <span class="ident">lifetime_def</span>) <span class="op">>></span>
<span class="ident">ty_params</span>: <span class="macro">opt_vec</span><span class="macro">!</span>(<span class="macro">preceded</span><span class="macro">!</span>(
<span class="macro">cond</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">lifetimes</span>.<span class="ident">is_empty</span>(), <span class="macro">punct</span><span class="macro">!</span>(<span class="string">","</span>)),
<span class="macro">separated_nonempty_list</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">","</span>), <span class="ident">ty_param</span>)
)) <span class="op">>></span>
<span class="macro">cond</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">lifetimes</span>.<span class="ident">is_empty</span>() <span class="op">||</span> <span class="op">!</span><span class="ident">ty_params</span>.<span class="ident">is_empty</span>(), <span class="macro">option</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">","</span>))) <span class="op">>></span>
<span class="macro">punct</span><span class="macro">!</span>(<span class="string">">"</span>) <span class="op">>></span>
(<span class="ident">lifetimes</span>, <span class="ident">ty_params</span>)
)
<span class="op">|</span>
<span class="macro">epsilon</span><span class="macro">!</span>() <span class="op">=></span> { <span class="op">|</span>_<span class="op">|</span> (<span class="ident">Vec</span>::<span class="ident">new</span>(), <span class="ident">Vec</span>::<span class="ident">new</span>()) }
),
<span class="op">|</span>(<span class="ident">lifetimes</span>, <span class="ident">ty_params</span>)<span class="op">|</span> <span class="ident">Generics</span> {
<span class="ident">lifetimes</span>: <span class="ident">lifetimes</span>,
<span class="ident">ty_params</span>: <span class="ident">ty_params</span>,
<span class="ident">where_clause</span>: <span class="ident">Default</span>::<span class="ident">default</span>(),
}
));
<span class="macro">named</span><span class="macro">!</span>(<span class="kw">pub</span> <span class="ident">lifetime</span> <span class="op">-></span> <span class="ident">Lifetime</span>, <span class="macro">preceded</span><span class="macro">!</span>(
<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"'"</span>),
<span class="macro">alt</span><span class="macro">!</span>(
<span class="macro">map</span><span class="macro">!</span>(<span class="ident">ident</span>, <span class="op">|</span><span class="ident">id</span><span class="op">|</span> <span class="ident">Lifetime</span> {
<span class="ident">ident</span>: <span class="macro">format</span><span class="macro">!</span>(<span class="string">"'{}"</span>, <span class="ident">id</span>).<span class="ident">into</span>(),
})
<span class="op">|</span>
<span class="macro">map</span><span class="macro">!</span>(<span class="macro">keyword</span><span class="macro">!</span>(<span class="string">"static"</span>), <span class="op">|</span>_<span class="op">|</span> <span class="ident">Lifetime</span> {
<span class="ident">ident</span>: <span class="string">"'static"</span>.<span class="ident">into</span>(),
})
)
));
<span class="macro">named</span><span class="macro">!</span>(<span class="kw">pub</span> <span class="ident">lifetime_def</span> <span class="op">-></span> <span class="ident">LifetimeDef</span>, <span class="macro">do_parse</span><span class="macro">!</span>(
<span class="ident">attrs</span>: <span class="macro">many0</span><span class="macro">!</span>(<span class="ident">outer_attr</span>) <span class="op">>></span>
<span class="ident">life</span>: <span class="ident">lifetime</span> <span class="op">>></span>
<span class="ident">bounds</span>: <span class="macro">opt_vec</span><span class="macro">!</span>(<span class="macro">preceded</span><span class="macro">!</span>(
<span class="macro">punct</span><span class="macro">!</span>(<span class="string">":"</span>),
<span class="macro">separated_list</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"+"</span>), <span class="ident">lifetime</span>)
)) <span class="op">>></span>
(<span class="ident">LifetimeDef</span> {
<span class="ident">attrs</span>: <span class="ident">attrs</span>,
<span class="ident">lifetime</span>: <span class="ident">life</span>,
<span class="ident">bounds</span>: <span class="ident">bounds</span>,
})
));
<span class="macro">named</span><span class="macro">!</span>(<span class="kw">pub</span> <span class="ident">bound_lifetimes</span> <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">LifetimeDef</span><span class="op">></span>, <span class="macro">opt_vec</span><span class="macro">!</span>(<span class="macro">do_parse</span><span class="macro">!</span>(
<span class="macro">keyword</span><span class="macro">!</span>(<span class="string">"for"</span>) <span class="op">>></span>
<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"<"</span>) <span class="op">>></span>
<span class="ident">lifetimes</span>: <span class="macro">terminated_list</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">","</span>), <span class="ident">lifetime_def</span>) <span class="op">>></span>
<span class="macro">punct</span><span class="macro">!</span>(<span class="string">">"</span>) <span class="op">>></span>
(<span class="ident">lifetimes</span>)
)));
<span class="macro">named</span><span class="macro">!</span>(<span class="ident">ty_param</span> <span class="op">-></span> <span class="ident">TyParam</span>, <span class="macro">do_parse</span><span class="macro">!</span>(
<span class="ident">attrs</span>: <span class="macro">many0</span><span class="macro">!</span>(<span class="ident">outer_attr</span>) <span class="op">>></span>
<span class="ident">id</span>: <span class="ident">ident</span> <span class="op">>></span>
<span class="ident">bounds</span>: <span class="macro">opt_vec</span><span class="macro">!</span>(<span class="macro">preceded</span><span class="macro">!</span>(
<span class="macro">punct</span><span class="macro">!</span>(<span class="string">":"</span>),
<span class="macro">separated_nonempty_list</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"+"</span>), <span class="ident">ty_param_bound</span>)
)) <span class="op">>></span>
<span class="ident">default</span>: <span class="macro">option</span><span class="macro">!</span>(<span class="macro">preceded</span><span class="macro">!</span>(
<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"="</span>),
<span class="ident">ty</span>
)) <span class="op">>></span>
(<span class="ident">TyParam</span> {
<span class="ident">attrs</span>: <span class="ident">attrs</span>,
<span class="ident">ident</span>: <span class="ident">id</span>,
<span class="ident">bounds</span>: <span class="ident">bounds</span>,
<span class="ident">default</span>: <span class="ident">default</span>,
})
));
<span class="macro">named</span><span class="macro">!</span>(<span class="kw">pub</span> <span class="ident">ty_param_bound</span> <span class="op">-></span> <span class="ident">TyParamBound</span>, <span class="macro">alt</span><span class="macro">!</span>(
<span class="macro">preceded</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"?"</span>), <span class="ident">poly_trait_ref</span>) <span class="op">=></span> {
<span class="op">|</span><span class="ident">poly</span><span class="op">|</span> <span class="ident">TyParamBound</span>::<span class="ident">Trait</span>(<span class="ident">poly</span>, <span class="ident">TraitBoundModifier</span>::<span class="ident">Maybe</span>)
}
<span class="op">|</span>
<span class="ident">lifetime</span> <span class="op">=></span> { <span class="ident">TyParamBound</span>::<span class="ident">Region</span> }
<span class="op">|</span>
<span class="ident">poly_trait_ref</span> <span class="op">=></span> {
<span class="op">|</span><span class="ident">poly</span><span class="op">|</span> <span class="ident">TyParamBound</span>::<span class="ident">Trait</span>(<span class="ident">poly</span>, <span class="ident">TraitBoundModifier</span>::<span class="prelude-val">None</span>)
}
));
<span class="macro">named</span><span class="macro">!</span>(<span class="kw">pub</span> <span class="ident">where_clause</span> <span class="op">-></span> <span class="ident">WhereClause</span>, <span class="macro">alt</span><span class="macro">!</span>(
<span class="macro">do_parse</span><span class="macro">!</span>(
<span class="macro">keyword</span><span class="macro">!</span>(<span class="string">"where"</span>) <span class="op">>></span>
<span class="ident">predicates</span>: <span class="macro">separated_nonempty_list</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">","</span>), <span class="ident">where_predicate</span>) <span class="op">>></span>
<span class="macro">option</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">","</span>)) <span class="op">>></span>
(<span class="ident">WhereClause</span> { <span class="ident">predicates</span>: <span class="ident">predicates</span> })
)
<span class="op">|</span>
<span class="macro">epsilon</span><span class="macro">!</span>() <span class="op">=></span> { <span class="op">|</span>_<span class="op">|</span> <span class="ident">Default</span>::<span class="ident">default</span>() }
));
<span class="macro">named</span><span class="macro">!</span>(<span class="ident">where_predicate</span> <span class="op">-></span> <span class="ident">WherePredicate</span>, <span class="macro">alt</span><span class="macro">!</span>(
<span class="macro">do_parse</span><span class="macro">!</span>(
<span class="ident">ident</span>: <span class="ident">lifetime</span> <span class="op">>></span>
<span class="ident">bounds</span>: <span class="macro">opt_vec</span><span class="macro">!</span>(<span class="macro">preceded</span><span class="macro">!</span>(
<span class="macro">punct</span><span class="macro">!</span>(<span class="string">":"</span>),
<span class="macro">separated_list</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"+"</span>), <span class="ident">lifetime</span>)
)) <span class="op">>></span>
(<span class="ident">WherePredicate</span>::<span class="ident">RegionPredicate</span>(<span class="ident">WhereRegionPredicate</span> {
<span class="ident">lifetime</span>: <span class="ident">ident</span>,
<span class="ident">bounds</span>: <span class="ident">bounds</span>,
}))
)
<span class="op">|</span>
<span class="macro">do_parse</span><span class="macro">!</span>(
<span class="ident">bound_lifetimes</span>: <span class="ident">bound_lifetimes</span> <span class="op">>></span>
<span class="ident">bounded_ty</span>: <span class="ident">ty</span> <span class="op">>></span>
<span class="macro">punct</span><span class="macro">!</span>(<span class="string">":"</span>) <span class="op">>></span>
<span class="ident">bounds</span>: <span class="macro">separated_nonempty_list</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"+"</span>), <span class="ident">ty_param_bound</span>) <span class="op">>></span>
(<span class="ident">WherePredicate</span>::<span class="ident">BoundPredicate</span>(<span class="ident">WhereBoundPredicate</span> {
<span class="ident">bound_lifetimes</span>: <span class="ident">bound_lifetimes</span>,
<span class="ident">bounded_ty</span>: <span class="ident">bounded_ty</span>,
<span class="ident">bounds</span>: <span class="ident">bounds</span>,
}))
)
));
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span>
<span class="kw">mod</span> <span class="ident">printing</span> {
<span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">attr</span>::<span class="ident">FilterAttrs</span>;
<span class="kw">use</span> <span class="ident">quote</span>::{<span class="ident">Tokens</span>, <span class="ident">ToTokens</span>};
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">Generics</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">let</span> <span class="ident">has_lifetimes</span> <span class="op">=</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">lifetimes</span>.<span class="ident">is_empty</span>();
<span class="kw">let</span> <span class="ident">has_ty_params</span> <span class="op">=</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">ty_params</span>.<span class="ident">is_empty</span>();
<span class="kw">if</span> <span class="ident">has_lifetimes</span> <span class="op">||</span> <span class="ident">has_ty_params</span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"<"</span>);
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">lifetimes</span>, <span class="string">","</span>);
<span class="kw">if</span> <span class="ident">has_lifetimes</span> <span class="op">&&</span> <span class="ident">has_ty_params</span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">","</span>);
}
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">ty_params</span>, <span class="string">","</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">">"</span>);
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">ImplGenerics</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">let</span> <span class="ident">has_lifetimes</span> <span class="op">=</span> <span class="op">!</span><span class="self">self</span>.<span class="number">0</span>.<span class="ident">lifetimes</span>.<span class="ident">is_empty</span>();
<span class="kw">let</span> <span class="ident">has_ty_params</span> <span class="op">=</span> <span class="op">!</span><span class="self">self</span>.<span class="number">0</span>.<span class="ident">ty_params</span>.<span class="ident">is_empty</span>();
<span class="kw">if</span> <span class="ident">has_lifetimes</span> <span class="op">||</span> <span class="ident">has_ty_params</span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"<"</span>);
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>.<span class="ident">lifetimes</span>, <span class="string">","</span>);
<span class="comment">// Leave off the type parameter defaults</span>
<span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">ty_param</span>) <span class="kw">in</span> <span class="self">self</span>.<span class="number">0</span>
.<span class="ident">ty_params</span>
.<span class="ident">iter</span>()
.<span class="ident">enumerate</span>() {
<span class="kw">if</span> <span class="ident">i</span> <span class="op">></span> <span class="number">0</span> <span class="op">||</span> <span class="ident">has_lifetimes</span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">","</span>);
}
<span class="ident">tokens</span>.<span class="ident">append_all</span>(<span class="ident">ty_param</span>.<span class="ident">attrs</span>.<span class="ident">outer</span>());
<span class="ident">ty_param</span>.<span class="ident">ident</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
<span class="kw">if</span> <span class="op">!</span><span class="ident">ty_param</span>.<span class="ident">bounds</span>.<span class="ident">is_empty</span>() {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">":"</span>);
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="kw-2">&</span><span class="ident">ty_param</span>.<span class="ident">bounds</span>, <span class="string">"+"</span>);
}
}
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">">"</span>);
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">TyGenerics</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">let</span> <span class="ident">has_lifetimes</span> <span class="op">=</span> <span class="op">!</span><span class="self">self</span>.<span class="number">0</span>.<span class="ident">lifetimes</span>.<span class="ident">is_empty</span>();
<span class="kw">let</span> <span class="ident">has_ty_params</span> <span class="op">=</span> <span class="op">!</span><span class="self">self</span>.<span class="number">0</span>.<span class="ident">ty_params</span>.<span class="ident">is_empty</span>();
<span class="kw">if</span> <span class="ident">has_lifetimes</span> <span class="op">||</span> <span class="ident">has_ty_params</span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"<"</span>);
<span class="comment">// Leave off the lifetime bounds and attributes</span>
<span class="kw">let</span> <span class="ident">lifetimes</span> <span class="op">=</span> <span class="self">self</span>.<span class="number">0</span>
.<span class="ident">lifetimes</span>
.<span class="ident">iter</span>()
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">ld</span><span class="op">|</span> <span class="kw-2">&</span><span class="ident">ld</span>.<span class="ident">lifetime</span>);
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="ident">lifetimes</span>, <span class="string">","</span>);
<span class="kw">if</span> <span class="ident">has_lifetimes</span> <span class="op">&&</span> <span class="ident">has_ty_params</span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">","</span>);
}
<span class="comment">// Leave off the type parameter bounds, defaults, and attributes</span>
<span class="kw">let</span> <span class="ident">ty_params</span> <span class="op">=</span> <span class="self">self</span>.<span class="number">0</span>
.<span class="ident">ty_params</span>
.<span class="ident">iter</span>()
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">tp</span><span class="op">|</span> <span class="kw-2">&</span><span class="ident">tp</span>.<span class="ident">ident</span>);
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="ident">ty_params</span>, <span class="string">","</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">">"</span>);
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">Turbofish</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">let</span> <span class="ident">has_lifetimes</span> <span class="op">=</span> <span class="op">!</span><span class="self">self</span>.<span class="number">0</span>.<span class="ident">lifetimes</span>.<span class="ident">is_empty</span>();
<span class="kw">let</span> <span class="ident">has_ty_params</span> <span class="op">=</span> <span class="op">!</span><span class="self">self</span>.<span class="number">0</span>.<span class="ident">ty_params</span>.<span class="ident">is_empty</span>();
<span class="kw">if</span> <span class="ident">has_lifetimes</span> <span class="op">||</span> <span class="ident">has_ty_params</span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"::"</span>);
<span class="ident">TyGenerics</span>(<span class="self">self</span>.<span class="number">0</span>).<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">Lifetime</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="self">self</span>.<span class="ident">ident</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">LifetimeDef</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="ident">tokens</span>.<span class="ident">append_all</span>(<span class="self">self</span>.<span class="ident">attrs</span>.<span class="ident">outer</span>());
<span class="self">self</span>.<span class="ident">lifetime</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">bounds</span>.<span class="ident">is_empty</span>() {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">":"</span>);
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">bounds</span>, <span class="string">"+"</span>);
}
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">TyParam</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="ident">tokens</span>.<span class="ident">append_all</span>(<span class="self">self</span>.<span class="ident">attrs</span>.<span class="ident">outer</span>());
<span class="self">self</span>.<span class="ident">ident</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">bounds</span>.<span class="ident">is_empty</span>() {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">":"</span>);
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">bounds</span>, <span class="string">"+"</span>);
}
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">default</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">default</span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"="</span>);
<span class="ident">default</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">TyParamBound</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">TyParamBound</span>::<span class="ident">Region</span>(<span class="kw-2">ref</span> <span class="ident">lifetime</span>) <span class="op">=></span> <span class="ident">lifetime</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>),
<span class="ident">TyParamBound</span>::<span class="ident">Trait</span>(<span class="kw-2">ref</span> <span class="ident">trait_ref</span>, <span class="ident">modifier</span>) <span class="op">=></span> {
<span class="kw">match</span> <span class="ident">modifier</span> {
<span class="ident">TraitBoundModifier</span>::<span class="prelude-val">None</span> <span class="op">=></span> {}
<span class="ident">TraitBoundModifier</span>::<span class="ident">Maybe</span> <span class="op">=></span> <span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"?"</span>),
}
<span class="ident">trait_ref</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
}
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">WhereClause</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">predicates</span>.<span class="ident">is_empty</span>() {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"where"</span>);
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">predicates</span>, <span class="string">","</span>);
}
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">WherePredicate</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">WherePredicate</span>::<span class="ident">BoundPredicate</span>(<span class="kw-2">ref</span> <span class="ident">predicate</span>) <span class="op">=></span> {
<span class="ident">predicate</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
<span class="ident">WherePredicate</span>::<span class="ident">RegionPredicate</span>(<span class="kw-2">ref</span> <span class="ident">predicate</span>) <span class="op">=></span> {
<span class="ident">predicate</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
<span class="ident">WherePredicate</span>::<span class="ident">EqPredicate</span>(<span class="kw-2">ref</span> <span class="ident">predicate</span>) <span class="op">=></span> {
<span class="ident">predicate</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
}
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">WhereBoundPredicate</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">bound_lifetimes</span>.<span class="ident">is_empty</span>() {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"for"</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"<"</span>);
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">bound_lifetimes</span>, <span class="string">","</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">">"</span>);
}
<span class="self">self</span>.<span class="ident">bounded_ty</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">bounds</span>.<span class="ident">is_empty</span>() {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">":"</span>);
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">bounds</span>, <span class="string">"+"</span>);
}
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">WhereRegionPredicate</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="self">self</span>.<span class="ident">lifetime</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">bounds</span>.<span class="ident">is_empty</span>() {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">":"</span>);
<span class="ident">tokens</span>.<span class="ident">append_separated</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">bounds</span>, <span class="string">"+"</span>);
}
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">WhereEqPredicate</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="self">self</span>.<span class="ident">lhs_ty</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"="</span>);
<span class="self">self</span>.<span class="ident">rhs_ty</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
}
}
</pre>
</section>
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</dl>
</div>
<div class="infos">
<h2>Search Tricks</h2>
<p>
Prefix searches with a type followed by a colon (e.g.
<code>fn:</code>) to restrict the search to a given type.
</p>
<p>
Accepted types are: <code>fn</code>, <code>mod</code>,
<code>struct</code>, <code>enum</code>,
<code>trait</code>, <code>type</code>, <code>macro</code>,
and <code>const</code>.
</p>
<p>
Search functions by type signature (e.g.
<code>vec -> usize</code> or <code>* -> vec</code>)
</p>
</div>
</div>
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