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</pre><pre class="rust ">
<span class="comment">// Adapted from libsyntax.</span>
<span class="doccomment">//! AST walker. Each overridden visit method has full control over what</span>
<span class="doccomment">//! happens with its node, it can do its own traversal of the node's children,</span>
<span class="doccomment">//! call `visit::walk_*` to apply the default traversal algorithm, or prevent</span>
<span class="doccomment">//! deeper traversal by doing nothing.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Note: it is an important invariant that the default visitor walks the body</span>
<span class="doccomment">//! of a function in "execution order" (more concretely, reverse post-order</span>
<span class="doccomment">//! with respect to the CFG implied by the AST), meaning that if AST node A may</span>
<span class="doccomment">//! execute before AST node B, then A is visited first. The borrow checker in</span>
<span class="doccomment">//! particular relies on this property.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Note: walking an AST before macro expansion is probably a bad idea. For</span>
<span class="doccomment">//! instance, a walker looking for item names in a module will miss all of</span>
<span class="doccomment">//! those that are created by the expansion of a macro.</span>
<span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>;
<span class="doccomment">/// Each method of the Visitor trait is a hook to be potentially</span>
<span class="doccomment">/// overridden. Each method's default implementation recursively visits</span>
<span class="doccomment">/// the substructure of the input via the corresponding `walk` method;</span>
<span class="doccomment">/// e.g. the `visit_mod` method by default calls `visit::walk_mod`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If you want to ensure that your code handles every variant</span>
<span class="doccomment">/// explicitly, you need to override each method. (And you also need</span>
<span class="doccomment">/// to monitor future changes to `Visitor` in case a new method with a</span>
<span class="doccomment">/// new default implementation gets introduced.)</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">Visitor</span>: <span class="ident">Sized</span> {
<span class="kw">fn</span> <span class="ident">visit_ident</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_ident</span>: <span class="kw-2">&</span><span class="ident">Ident</span>) {}
<span class="kw">fn</span> <span class="ident">visit_derive_input</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">derive_input</span>: <span class="kw-2">&</span><span class="ident">DeriveInput</span>) {
<span class="ident">walk_derive_input</span>(<span class="self">self</span>, <span class="ident">derive_input</span>)
}
<span class="kw">fn</span> <span class="ident">visit_ty</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ty</span>: <span class="kw-2">&</span><span class="ident">Ty</span>) {
<span class="ident">walk_ty</span>(<span class="self">self</span>, <span class="ident">ty</span>)
}
<span class="kw">fn</span> <span class="ident">visit_generics</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">generics</span>: <span class="kw-2">&</span><span class="ident">Generics</span>) {
<span class="ident">walk_generics</span>(<span class="self">self</span>, <span class="ident">generics</span>)
}
<span class="kw">fn</span> <span class="ident">visit_ty_param_bound</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">bound</span>: <span class="kw-2">&</span><span class="ident">TyParamBound</span>) {
<span class="ident">walk_ty_param_bound</span>(<span class="self">self</span>, <span class="ident">bound</span>)
}
<span class="kw">fn</span> <span class="ident">visit_poly_trait_ref</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">trait_ref</span>: <span class="kw-2">&</span><span class="ident">PolyTraitRef</span>, <span class="ident">modifier</span>: <span class="kw-2">&</span><span class="ident">TraitBoundModifier</span>) {
<span class="ident">walk_poly_trait_ref</span>(<span class="self">self</span>, <span class="ident">trait_ref</span>, <span class="ident">modifier</span>)
}
<span class="kw">fn</span> <span class="ident">visit_variant_data</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">data</span>: <span class="kw-2">&</span><span class="ident">VariantData</span>, <span class="ident">_ident</span>: <span class="kw-2">&</span><span class="ident">Ident</span>, <span class="ident">_generics</span>: <span class="kw-2">&</span><span class="ident">Generics</span>) {
<span class="ident">walk_variant_data</span>(<span class="self">self</span>, <span class="ident">data</span>)
}
<span class="kw">fn</span> <span class="ident">visit_field</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">field</span>: <span class="kw-2">&</span><span class="ident">Field</span>) {
<span class="ident">walk_field</span>(<span class="self">self</span>, <span class="ident">field</span>)
}
<span class="kw">fn</span> <span class="ident">visit_variant</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">variant</span>: <span class="kw-2">&</span><span class="ident">Variant</span>, <span class="ident">generics</span>: <span class="kw-2">&</span><span class="ident">Generics</span>) {
<span class="ident">walk_variant</span>(<span class="self">self</span>, <span class="ident">variant</span>, <span class="ident">generics</span>)
}
<span class="kw">fn</span> <span class="ident">visit_lifetime</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_lifetime</span>: <span class="kw-2">&</span><span class="ident">Lifetime</span>) {}
<span class="kw">fn</span> <span class="ident">visit_lifetime_def</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">lifetime</span>: <span class="kw-2">&</span><span class="ident">LifetimeDef</span>) {
<span class="ident">walk_lifetime_def</span>(<span class="self">self</span>, <span class="ident">lifetime</span>)
}
<span class="kw">fn</span> <span class="ident">visit_path</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">path</span>: <span class="kw-2">&</span><span class="ident">Path</span>) {
<span class="ident">walk_path</span>(<span class="self">self</span>, <span class="ident">path</span>)
}
<span class="kw">fn</span> <span class="ident">visit_path_segment</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">path_segment</span>: <span class="kw-2">&</span><span class="ident">PathSegment</span>) {
<span class="ident">walk_path_segment</span>(<span class="self">self</span>, <span class="ident">path_segment</span>)
}
<span class="kw">fn</span> <span class="ident">visit_path_parameters</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">path_parameters</span>: <span class="kw-2">&</span><span class="ident">PathParameters</span>) {
<span class="ident">walk_path_parameters</span>(<span class="self">self</span>, <span class="ident">path_parameters</span>)
}
<span class="kw">fn</span> <span class="ident">visit_assoc_type_binding</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">type_binding</span>: <span class="kw-2">&</span><span class="ident">TypeBinding</span>) {
<span class="ident">walk_assoc_type_binding</span>(<span class="self">self</span>, <span class="ident">type_binding</span>)
}
<span class="kw">fn</span> <span class="ident">visit_attribute</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_attr</span>: <span class="kw-2">&</span><span class="ident">Attribute</span>) {}
<span class="kw">fn</span> <span class="ident">visit_fn_ret_ty</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ret_ty</span>: <span class="kw-2">&</span><span class="ident">FunctionRetTy</span>) {
<span class="ident">walk_fn_ret_ty</span>(<span class="self">self</span>, <span class="ident">ret_ty</span>)
}
<span class="kw">fn</span> <span class="ident">visit_const_expr</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">expr</span>: <span class="kw-2">&</span><span class="ident">ConstExpr</span>) {
<span class="ident">walk_const_expr</span>(<span class="self">self</span>, <span class="ident">expr</span>)
}
<span class="kw">fn</span> <span class="ident">visit_lit</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_lit</span>: <span class="kw-2">&</span><span class="ident">Lit</span>) {}
<span class="kw">fn</span> <span class="ident">visit_mac</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">mac</span>: <span class="kw-2">&</span><span class="ident">Mac</span>) {
<span class="ident">walk_mac</span>(<span class="self">self</span>, <span class="ident">mac</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_crate</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_crate</span>: <span class="kw-2">&</span><span class="ident">Crate</span>) {
<span class="ident">walk_crate</span>(<span class="self">self</span>, <span class="ident">_crate</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_item</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">item</span>: <span class="kw-2">&</span><span class="ident">Item</span>) {
<span class="ident">walk_item</span>(<span class="self">self</span>, <span class="ident">item</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_expr</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">expr</span>: <span class="kw-2">&</span><span class="ident">Expr</span>) {
<span class="ident">walk_expr</span>(<span class="self">self</span>, <span class="ident">expr</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_foreign_item</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">foreign_item</span>: <span class="kw-2">&</span><span class="ident">ForeignItem</span>) {
<span class="ident">walk_foreign_item</span>(<span class="self">self</span>, <span class="ident">foreign_item</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_pat</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">pat</span>: <span class="kw-2">&</span><span class="ident">Pat</span>) {
<span class="ident">walk_pat</span>(<span class="self">self</span>, <span class="ident">pat</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_fn_decl</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">fn_decl</span>: <span class="kw-2">&</span><span class="ident">FnDecl</span>) {
<span class="ident">walk_fn_decl</span>(<span class="self">self</span>, <span class="ident">fn_decl</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_trait_item</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">trait_item</span>: <span class="kw-2">&</span><span class="ident">TraitItem</span>) {
<span class="ident">walk_trait_item</span>(<span class="self">self</span>, <span class="ident">trait_item</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_impl_item</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">impl_item</span>: <span class="kw-2">&</span><span class="ident">ImplItem</span>) {
<span class="ident">walk_impl_item</span>(<span class="self">self</span>, <span class="ident">impl_item</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_method_sig</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">method_sig</span>: <span class="kw-2">&</span><span class="ident">MethodSig</span>) {
<span class="ident">walk_method_sig</span>(<span class="self">self</span>, <span class="ident">method_sig</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_stmt</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">stmt</span>: <span class="kw-2">&</span><span class="ident">Stmt</span>) {
<span class="ident">walk_stmt</span>(<span class="self">self</span>, <span class="ident">stmt</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_local</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">local</span>: <span class="kw-2">&</span><span class="ident">Local</span>) {
<span class="ident">walk_local</span>(<span class="self">self</span>, <span class="ident">local</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">visit_view_path</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">view_path</span>: <span class="kw-2">&</span><span class="ident">ViewPath</span>) {
<span class="ident">walk_view_path</span>(<span class="self">self</span>, <span class="ident">view_path</span>);
}
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">walk_list</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">visitor</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">method</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">list</span>:<span class="ident">expr</span> $(, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">extra_args</span>:<span class="ident">expr</span>)<span class="kw-2">*</span>) <span class="op">=></span> {
<span class="kw">for</span> <span class="ident">elem</span> <span class="kw">in</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">list</span> {
<span class="macro-nonterminal">$</span><span class="macro-nonterminal">visitor</span>.<span class="macro-nonterminal">$</span><span class="macro-nonterminal">method</span>(<span class="ident">elem</span> $(, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">extra_args</span>)<span class="kw-2">*</span>)
}
};
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_opt_ident</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">opt_ident</span>: <span class="kw-2">&</span><span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Ident</span><span class="op">></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">ident</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">opt_ident</span> {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="ident">ident</span>);
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_lifetime_def</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">lifetime_def</span>: <span class="kw-2">&</span><span class="ident">LifetimeDef</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_lifetime</span>(<span class="kw-2">&</span><span class="ident">lifetime_def</span>.<span class="ident">lifetime</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_lifetime</span>, <span class="kw-2">&</span><span class="ident">lifetime_def</span>.<span class="ident">bounds</span>);
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_poly_trait_ref</span><span class="op"><</span><span class="ident">V</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">trait_ref</span>: <span class="kw-2">&</span><span class="ident">PolyTraitRef</span>, _: <span class="kw-2">&</span><span class="ident">TraitBoundModifier</span>)
<span class="kw">where</span> <span class="ident">V</span>: <span class="ident">Visitor</span>
{
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_lifetime_def</span>, <span class="kw-2">&</span><span class="ident">trait_ref</span>.<span class="ident">bound_lifetimes</span>);
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="kw-2">&</span><span class="ident">trait_ref</span>.<span class="ident">trait_ref</span>);
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_derive_input</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">derive_input</span>: <span class="kw-2">&</span><span class="ident">DeriveInput</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="kw-2">&</span><span class="ident">derive_input</span>.<span class="ident">ident</span>);
<span class="ident">visitor</span>.<span class="ident">visit_generics</span>(<span class="kw-2">&</span><span class="ident">derive_input</span>.<span class="ident">generics</span>);
<span class="kw">match</span> <span class="ident">derive_input</span>.<span class="ident">body</span> {
<span class="ident">Body</span>::<span class="ident">Enum</span>(<span class="kw-2">ref</span> <span class="ident">variants</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_variant</span>, <span class="ident">variants</span>, <span class="kw-2">&</span><span class="ident">derive_input</span>.<span class="ident">generics</span>);
}
<span class="ident">Body</span>::<span class="ident">Struct</span>(<span class="kw-2">ref</span> <span class="ident">variant_data</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_variant_data</span>(<span class="ident">variant_data</span>, <span class="kw-2">&</span><span class="ident">derive_input</span>.<span class="ident">ident</span>, <span class="kw-2">&</span><span class="ident">derive_input</span>.<span class="ident">generics</span>);
}
}
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="kw-2">&</span><span class="ident">derive_input</span>.<span class="ident">attrs</span>);
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_variant</span><span class="op"><</span><span class="ident">V</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">variant</span>: <span class="kw-2">&</span><span class="ident">Variant</span>, <span class="ident">generics</span>: <span class="kw-2">&</span><span class="ident">Generics</span>)
<span class="kw">where</span> <span class="ident">V</span>: <span class="ident">Visitor</span>
{
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="kw-2">&</span><span class="ident">variant</span>.<span class="ident">ident</span>);
<span class="ident">visitor</span>.<span class="ident">visit_variant_data</span>(<span class="kw-2">&</span><span class="ident">variant</span>.<span class="ident">data</span>, <span class="kw-2">&</span><span class="ident">variant</span>.<span class="ident">ident</span>, <span class="ident">generics</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="kw-2">&</span><span class="ident">variant</span>.<span class="ident">attrs</span>);
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_ty</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">ty</span>: <span class="kw-2">&</span><span class="ident">Ty</span>) {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">ty</span> {
<span class="ident">Ty</span>::<span class="ident">Slice</span>(<span class="kw-2">ref</span> <span class="ident">inner</span>) <span class="op">|</span>
<span class="ident">Ty</span>::<span class="ident">Paren</span>(<span class="kw-2">ref</span> <span class="ident">inner</span>) <span class="op">=></span> <span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">inner</span>),
<span class="ident">Ty</span>::<span class="ident">Ptr</span>(<span class="kw-2">ref</span> <span class="ident">mutable_type</span>) <span class="op">=></span> <span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="kw-2">&</span><span class="ident">mutable_type</span>.<span class="ident">ty</span>),
<span class="ident">Ty</span>::<span class="ident">Rptr</span>(<span class="kw-2">ref</span> <span class="ident">opt_lifetime</span>, <span class="kw-2">ref</span> <span class="ident">mutable_type</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_lifetime</span>, <span class="ident">opt_lifetime</span>);
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="kw-2">&</span><span class="ident">mutable_type</span>.<span class="ident">ty</span>)
}
<span class="ident">Ty</span>::<span class="ident">Never</span> <span class="op">|</span> <span class="ident">Ty</span>::<span class="ident">Infer</span> <span class="op">=></span> {}
<span class="ident">Ty</span>::<span class="ident">Tup</span>(<span class="kw-2">ref</span> <span class="ident">tuple_element_types</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_ty</span>, <span class="ident">tuple_element_types</span>);
}
<span class="ident">Ty</span>::<span class="ident">BareFn</span>(<span class="kw-2">ref</span> <span class="ident">bare_fn</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_lifetime_def</span>, <span class="kw-2">&</span><span class="ident">bare_fn</span>.<span class="ident">lifetimes</span>);
<span class="kw">for</span> <span class="ident">argument</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">bare_fn</span>.<span class="ident">inputs</span> {
<span class="ident">walk_opt_ident</span>(<span class="ident">visitor</span>, <span class="kw-2">&</span><span class="ident">argument</span>.<span class="ident">name</span>);
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="kw-2">&</span><span class="ident">argument</span>.<span class="ident">ty</span>)
}
<span class="ident">visitor</span>.<span class="ident">visit_fn_ret_ty</span>(<span class="kw-2">&</span><span class="ident">bare_fn</span>.<span class="ident">output</span>)
}
<span class="ident">Ty</span>::<span class="ident">Path</span>(<span class="kw-2">ref</span> <span class="ident">maybe_qself</span>, <span class="kw-2">ref</span> <span class="ident">path</span>) <span class="op">=></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">qself</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_qself</span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="kw-2">&</span><span class="ident">qself</span>.<span class="ident">ty</span>);
}
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
}
<span class="ident">Ty</span>::<span class="ident">Array</span>(<span class="kw-2">ref</span> <span class="ident">inner</span>, <span class="kw-2">ref</span> <span class="ident">len</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">inner</span>);
<span class="ident">visitor</span>.<span class="ident">visit_const_expr</span>(<span class="ident">len</span>);
}
<span class="ident">Ty</span>::<span class="ident">TraitObject</span>(<span class="kw-2">ref</span> <span class="ident">bounds</span>) <span class="op">|</span>
<span class="ident">Ty</span>::<span class="ident">ImplTrait</span>(<span class="kw-2">ref</span> <span class="ident">bounds</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_ty_param_bound</span>, <span class="ident">bounds</span>);
}
<span class="ident">Ty</span>::<span class="ident">Mac</span>(<span class="kw-2">ref</span> <span class="ident">mac</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_mac</span>(<span class="ident">mac</span>);
}
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_path</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">path</span>: <span class="kw-2">&</span><span class="ident">Path</span>) {
<span class="kw">for</span> <span class="ident">segment</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">path</span>.<span class="ident">segments</span> {
<span class="ident">visitor</span>.<span class="ident">visit_path_segment</span>(<span class="ident">segment</span>);
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_path_segment</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">segment</span>: <span class="kw-2">&</span><span class="ident">PathSegment</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="kw-2">&</span><span class="ident">segment</span>.<span class="ident">ident</span>);
<span class="ident">visitor</span>.<span class="ident">visit_path_parameters</span>(<span class="kw-2">&</span><span class="ident">segment</span>.<span class="ident">parameters</span>);
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_path_parameters</span><span class="op"><</span><span class="ident">V</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">path_parameters</span>: <span class="kw-2">&</span><span class="ident">PathParameters</span>)
<span class="kw">where</span> <span class="ident">V</span>: <span class="ident">Visitor</span>
{
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">path_parameters</span> {
<span class="ident">PathParameters</span>::<span class="ident">AngleBracketed</span>(<span class="kw-2">ref</span> <span class="ident">data</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_ty</span>, <span class="kw-2">&</span><span class="ident">data</span>.<span class="ident">types</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_lifetime</span>, <span class="kw-2">&</span><span class="ident">data</span>.<span class="ident">lifetimes</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_assoc_type_binding</span>, <span class="kw-2">&</span><span class="ident">data</span>.<span class="ident">bindings</span>);
}
<span class="ident">PathParameters</span>::<span class="ident">Parenthesized</span>(<span class="kw-2">ref</span> <span class="ident">data</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_ty</span>, <span class="kw-2">&</span><span class="ident">data</span>.<span class="ident">inputs</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_ty</span>, <span class="kw-2">&</span><span class="ident">data</span>.<span class="ident">output</span>);
}
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_assoc_type_binding</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">type_binding</span>: <span class="kw-2">&</span><span class="ident">TypeBinding</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="kw-2">&</span><span class="ident">type_binding</span>.<span class="ident">ident</span>);
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="kw-2">&</span><span class="ident">type_binding</span>.<span class="ident">ty</span>);
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_ty_param_bound</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">bound</span>: <span class="kw-2">&</span><span class="ident">TyParamBound</span>) {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">bound</span> {
<span class="ident">TyParamBound</span>::<span class="ident">Trait</span>(<span class="kw-2">ref</span> <span class="ident">ty</span>, <span class="kw-2">ref</span> <span class="ident">modifier</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_poly_trait_ref</span>(<span class="ident">ty</span>, <span class="ident">modifier</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">visitor</span>.<span class="ident">visit_lifetime</span>(<span class="ident">lifetime</span>);
}
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_generics</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">generics</span>: <span class="kw-2">&</span><span class="ident">Generics</span>) {
<span class="kw">for</span> <span class="ident">param</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">generics</span>.<span class="ident">ty_params</span> {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="kw-2">&</span><span class="ident">param</span>.<span class="ident">ident</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_ty_param_bound</span>, <span class="kw-2">&</span><span class="ident">param</span>.<span class="ident">bounds</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_ty</span>, <span class="kw-2">&</span><span class="ident">param</span>.<span class="ident">default</span>);
}
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_lifetime_def</span>, <span class="kw-2">&</span><span class="ident">generics</span>.<span class="ident">lifetimes</span>);
<span class="kw">for</span> <span class="ident">predicate</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">generics</span>.<span class="ident">where_clause</span>.<span class="ident">predicates</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">predicate</span> {
<span class="ident">WherePredicate</span>::<span class="ident">BoundPredicate</span>(<span class="ident">WhereBoundPredicate</span> { <span class="kw-2">ref</span> <span class="ident">bounded_ty</span>,
<span class="kw-2">ref</span> <span class="ident">bounds</span>,
<span class="kw-2">ref</span> <span class="ident">bound_lifetimes</span>,
.. }) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">bounded_ty</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_ty_param_bound</span>, <span class="ident">bounds</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_lifetime_def</span>, <span class="ident">bound_lifetimes</span>);
}
<span class="ident">WherePredicate</span>::<span class="ident">RegionPredicate</span>(<span class="ident">WhereRegionPredicate</span> { <span class="kw-2">ref</span> <span class="ident">lifetime</span>,
<span class="kw-2">ref</span> <span class="ident">bounds</span>,
.. }) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_lifetime</span>(<span class="ident">lifetime</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_lifetime</span>, <span class="ident">bounds</span>);
}
<span class="ident">WherePredicate</span>::<span class="ident">EqPredicate</span>(<span class="ident">WhereEqPredicate</span> { <span class="kw-2">ref</span> <span class="ident">lhs_ty</span>, <span class="kw-2">ref</span> <span class="ident">rhs_ty</span>, .. }) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">lhs_ty</span>);
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">rhs_ty</span>);
}
}
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_fn_ret_ty</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">ret_ty</span>: <span class="kw-2">&</span><span class="ident">FunctionRetTy</span>) {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">FunctionRetTy</span>::<span class="ident">Ty</span>(<span class="kw-2">ref</span> <span class="ident">output_ty</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">ret_ty</span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">output_ty</span>)
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_variant_data</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">data</span>: <span class="kw-2">&</span><span class="ident">VariantData</span>) {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_field</span>, <span class="ident">data</span>.<span class="ident">fields</span>());
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_field</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">field</span>: <span class="kw-2">&</span><span class="ident">Field</span>) {
<span class="ident">walk_opt_ident</span>(<span class="ident">visitor</span>, <span class="kw-2">&</span><span class="ident">field</span>.<span class="ident">ident</span>);
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="kw-2">&</span><span class="ident">field</span>.<span class="ident">ty</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="kw-2">&</span><span class="ident">field</span>.<span class="ident">attrs</span>);
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_const_expr</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">len</span>: <span class="kw-2">&</span><span class="ident">ConstExpr</span>) {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">len</span> {
<span class="ident">ConstExpr</span>::<span class="ident">Call</span>(<span class="kw-2">ref</span> <span class="ident">function</span>, <span class="kw-2">ref</span> <span class="ident">args</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_const_expr</span>(<span class="ident">function</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_const_expr</span>, <span class="ident">args</span>);
}
<span class="ident">ConstExpr</span>::<span class="ident">Binary</span>(<span class="ident">_op</span>, <span class="kw-2">ref</span> <span class="ident">left</span>, <span class="kw-2">ref</span> <span class="ident">right</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_const_expr</span>(<span class="ident">left</span>);
<span class="ident">visitor</span>.<span class="ident">visit_const_expr</span>(<span class="ident">right</span>);
}
<span class="ident">ConstExpr</span>::<span class="ident">Unary</span>(<span class="ident">_op</span>, <span class="kw-2">ref</span> <span class="ident">v</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_const_expr</span>(<span class="ident">v</span>);
}
<span class="ident">ConstExpr</span>::<span class="ident">Lit</span>(<span class="kw-2">ref</span> <span class="ident">lit</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_lit</span>(<span class="ident">lit</span>);
}
<span class="ident">ConstExpr</span>::<span class="ident">Cast</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>, <span class="kw-2">ref</span> <span class="ident">ty</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_const_expr</span>(<span class="ident">expr</span>);
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</span>);
}
<span class="ident">ConstExpr</span>::<span class="ident">Path</span>(<span class="kw-2">ref</span> <span class="ident">path</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
}
<span class="ident">ConstExpr</span>::<span class="ident">Index</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>, <span class="kw-2">ref</span> <span class="ident">index</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_const_expr</span>(<span class="ident">expr</span>);
<span class="ident">visitor</span>.<span class="ident">visit_const_expr</span>(<span class="ident">index</span>);
}
<span class="ident">ConstExpr</span>::<span class="ident">Paren</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_const_expr</span>(<span class="ident">expr</span>);
}
<span class="ident">ConstExpr</span>::<span class="ident">Other</span>(<span class="kw-2">ref</span> <span class="ident">other</span>) <span class="op">=></span> {
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">fn</span> <span class="ident">walk_other</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">Expr</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">other</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>))]</span>
<span class="kw">fn</span> <span class="ident">walk_other</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(_: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, _: <span class="kw-2">&</span><span class="kw">super</span>::<span class="ident">constant</span>::<span class="ident">Other</span>) {}
<span class="ident">walk_other</span>(<span class="ident">visitor</span>, <span class="ident">other</span>);
}
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_mac</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">mac</span>: <span class="kw-2">&</span><span class="ident">Mac</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="kw-2">&</span><span class="ident">mac</span>.<span class="ident">path</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_crate</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">_crate</span>: <span class="kw-2">&</span><span class="ident">Crate</span>) {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="kw-2">&</span><span class="ident">_crate</span>.<span class="ident">attrs</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_item</span>, <span class="kw-2">&</span><span class="ident">_crate</span>.<span class="ident">items</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_item</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">item</span>: <span class="kw-2">&</span><span class="ident">Item</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="kw-2">&</span><span class="ident">item</span>.<span class="ident">ident</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="kw-2">&</span><span class="ident">item</span>.<span class="ident">attrs</span>);
<span class="kw">match</span> <span class="ident">item</span>.<span class="ident">node</span> {
<span class="ident">ItemKind</span>::<span class="ident">ExternCrate</span>(<span class="kw-2">ref</span> <span class="ident">ident</span>) <span class="op">=></span> {
<span class="ident">walk_opt_ident</span>(<span class="ident">visitor</span>, <span class="ident">ident</span>);
}
<span class="ident">ItemKind</span>::<span class="ident">Use</span>(<span class="kw-2">ref</span> <span class="ident">view_path</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_view_path</span>(<span class="ident">view_path</span>);
}
<span class="ident">ItemKind</span>::<span class="ident">Static</span>(<span class="kw-2">ref</span> <span class="ident">ty</span>, _, <span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">|</span>
<span class="ident">ItemKind</span>::<span class="ident">Const</span>(<span class="kw-2">ref</span> <span class="ident">ty</span>, <span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
}
<span class="ident">ItemKind</span>::<span class="ident">Fn</span>(<span class="kw-2">ref</span> <span class="ident">decl</span>, _, _, _, <span class="kw-2">ref</span> <span class="ident">generics</span>, <span class="kw-2">ref</span> <span class="ident">body</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_fn_decl</span>(<span class="ident">decl</span>);
<span class="ident">visitor</span>.<span class="ident">visit_generics</span>(<span class="ident">generics</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_stmt</span>, <span class="kw-2">&</span><span class="ident">body</span>.<span class="ident">stmts</span>);
}
<span class="ident">ItemKind</span>::<span class="ident">Mod</span>(<span class="kw-2">ref</span> <span class="ident">maybe_items</span>) <span class="op">=></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">items</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_items</span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_item</span>, <span class="ident">items</span>);
}
}
<span class="ident">ItemKind</span>::<span class="ident">ForeignMod</span>(<span class="kw-2">ref</span> <span class="ident">foreign_mod</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_foreign_item</span>, <span class="kw-2">&</span><span class="ident">foreign_mod</span>.<span class="ident">items</span>);
}
<span class="ident">ItemKind</span>::<span class="ident">Ty</span>(<span class="kw-2">ref</span> <span class="ident">ty</span>, <span class="kw-2">ref</span> <span class="ident">generics</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</span>);
<span class="ident">visitor</span>.<span class="ident">visit_generics</span>(<span class="ident">generics</span>);
}
<span class="ident">ItemKind</span>::<span class="ident">Enum</span>(<span class="kw-2">ref</span> <span class="ident">variant</span>, <span class="kw-2">ref</span> <span class="ident">generics</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_variant</span>, <span class="ident">variant</span>, <span class="ident">generics</span>);
}
<span class="ident">ItemKind</span>::<span class="ident">Struct</span>(<span class="kw-2">ref</span> <span class="ident">variant_data</span>, <span class="kw-2">ref</span> <span class="ident">generics</span>) <span class="op">|</span>
<span class="ident">ItemKind</span>::<span class="ident">Union</span>(<span class="kw-2">ref</span> <span class="ident">variant_data</span>, <span class="kw-2">ref</span> <span class="ident">generics</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_variant_data</span>(<span class="ident">variant_data</span>, <span class="kw-2">&</span><span class="ident">item</span>.<span class="ident">ident</span>, <span class="ident">generics</span>);
}
<span class="ident">ItemKind</span>::<span class="ident">Trait</span>(_, <span class="kw-2">ref</span> <span class="ident">generics</span>, <span class="kw-2">ref</span> <span class="ident">bounds</span>, <span class="kw-2">ref</span> <span class="ident">trait_items</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_generics</span>(<span class="ident">generics</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_ty_param_bound</span>, <span class="ident">bounds</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_trait_item</span>, <span class="ident">trait_items</span>);
}
<span class="ident">ItemKind</span>::<span class="ident">DefaultImpl</span>(_, <span class="kw-2">ref</span> <span class="ident">path</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
}
<span class="ident">ItemKind</span>::<span class="ident">Impl</span>(_, _, <span class="kw-2">ref</span> <span class="ident">generics</span>, <span class="kw-2">ref</span> <span class="ident">maybe_path</span>, <span class="kw-2">ref</span> <span class="ident">ty</span>, <span class="kw-2">ref</span> <span class="ident">impl_items</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_generics</span>(<span class="ident">generics</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">path</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_path</span> {
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
}
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_impl_item</span>, <span class="ident">impl_items</span>);
}
<span class="ident">ItemKind</span>::<span class="ident">Mac</span>(<span class="kw-2">ref</span> <span class="ident">mac</span>) <span class="op">=></span> <span class="ident">visitor</span>.<span class="ident">visit_mac</span>(<span class="ident">mac</span>),
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"cargo-clippy"</span>, <span class="ident">allow</span>(<span class="ident">cyclomatic_complexity</span>))]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_expr</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">expr</span>: <span class="kw-2">&</span><span class="ident">Expr</span>) {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="kw-2">&</span><span class="ident">expr</span>.<span class="ident">attrs</span>);
<span class="kw">match</span> <span class="ident">expr</span>.<span class="ident">node</span> {
<span class="ident">ExprKind</span>::<span class="ident">InPlace</span>(<span class="kw-2">ref</span> <span class="ident">place</span>, <span class="kw-2">ref</span> <span class="ident">value</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">place</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">value</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Call</span>(<span class="kw-2">ref</span> <span class="ident">callee</span>, <span class="kw-2">ref</span> <span class="ident">args</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">callee</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_expr</span>, <span class="ident">args</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">MethodCall</span>(<span class="kw-2">ref</span> <span class="ident">name</span>, <span class="kw-2">ref</span> <span class="ident">ty_args</span>, <span class="kw-2">ref</span> <span class="ident">args</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="ident">name</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_ty</span>, <span class="ident">ty_args</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_expr</span>, <span class="ident">args</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Array</span>(<span class="kw-2">ref</span> <span class="ident">exprs</span>) <span class="op">|</span>
<span class="ident">ExprKind</span>::<span class="ident">Tup</span>(<span class="kw-2">ref</span> <span class="ident">exprs</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_expr</span>, <span class="ident">exprs</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Unary</span>(_, <span class="kw-2">ref</span> <span class="ident">operand</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">operand</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Lit</span>(<span class="kw-2">ref</span> <span class="ident">lit</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_lit</span>(<span class="ident">lit</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Cast</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>, <span class="kw-2">ref</span> <span class="ident">ty</span>) <span class="op">|</span>
<span class="ident">ExprKind</span>::<span class="ident">Type</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>, <span class="kw-2">ref</span> <span class="ident">ty</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">If</span>(<span class="kw-2">ref</span> <span class="ident">cond</span>, <span class="kw-2">ref</span> <span class="ident">cons</span>, <span class="kw-2">ref</span> <span class="ident">maybe_alt</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">cond</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_stmt</span>, <span class="kw-2">&</span><span class="ident">cons</span>.<span class="ident">stmts</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">alt</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_alt</span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">alt</span>);
}
}
<span class="ident">ExprKind</span>::<span class="ident">IfLet</span>(<span class="kw-2">ref</span> <span class="ident">pat</span>, <span class="kw-2">ref</span> <span class="ident">cond</span>, <span class="kw-2">ref</span> <span class="ident">cons</span>, <span class="kw-2">ref</span> <span class="ident">maybe_alt</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_pat</span>(<span class="ident">pat</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">cond</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_stmt</span>, <span class="kw-2">&</span><span class="ident">cons</span>.<span class="ident">stmts</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">alt</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_alt</span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">alt</span>);
}
}
<span class="ident">ExprKind</span>::<span class="ident">While</span>(<span class="kw-2">ref</span> <span class="ident">cond</span>, <span class="kw-2">ref</span> <span class="ident">body</span>, <span class="kw-2">ref</span> <span class="ident">label</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">cond</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_stmt</span>, <span class="kw-2">&</span><span class="ident">body</span>.<span class="ident">stmts</span>);
<span class="ident">walk_opt_ident</span>(<span class="ident">visitor</span>, <span class="ident">label</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">WhileLet</span>(<span class="kw-2">ref</span> <span class="ident">pat</span>, <span class="kw-2">ref</span> <span class="ident">cond</span>, <span class="kw-2">ref</span> <span class="ident">body</span>, <span class="kw-2">ref</span> <span class="ident">label</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_pat</span>(<span class="ident">pat</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">cond</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_stmt</span>, <span class="kw-2">&</span><span class="ident">body</span>.<span class="ident">stmts</span>);
<span class="ident">walk_opt_ident</span>(<span class="ident">visitor</span>, <span class="ident">label</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">ForLoop</span>(<span class="kw-2">ref</span> <span class="ident">pat</span>, <span class="kw-2">ref</span> <span class="ident">expr</span>, <span class="kw-2">ref</span> <span class="ident">body</span>, <span class="kw-2">ref</span> <span class="ident">label</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_pat</span>(<span class="ident">pat</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_stmt</span>, <span class="kw-2">&</span><span class="ident">body</span>.<span class="ident">stmts</span>);
<span class="ident">walk_opt_ident</span>(<span class="ident">visitor</span>, <span class="ident">label</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Loop</span>(<span class="kw-2">ref</span> <span class="ident">body</span>, <span class="kw-2">ref</span> <span class="ident">label</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_stmt</span>, <span class="kw-2">&</span><span class="ident">body</span>.<span class="ident">stmts</span>);
<span class="ident">walk_opt_ident</span>(<span class="ident">visitor</span>, <span class="ident">label</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Match</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>, <span class="kw-2">ref</span> <span class="ident">arms</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
<span class="kw">for</span> <span class="kw-2">&</span><span class="ident">Arm</span> { <span class="kw-2">ref</span> <span class="ident">attrs</span>, <span class="kw-2">ref</span> <span class="ident">pats</span>, <span class="kw-2">ref</span> <span class="ident">guard</span>, <span class="kw-2">ref</span> <span class="ident">body</span> } <span class="kw">in</span> <span class="ident">arms</span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="ident">attrs</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_pat</span>, <span class="ident">pats</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">guard</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">guard</span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">guard</span>);
}
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">body</span>);
}
}
<span class="ident">ExprKind</span>::<span class="ident">Closure</span>(_, <span class="kw-2">ref</span> <span class="ident">decl</span>, <span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_fn_decl</span>(<span class="ident">decl</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Block</span>(_, <span class="kw-2">ref</span> <span class="ident">block</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_stmt</span>, <span class="kw-2">&</span><span class="ident">block</span>.<span class="ident">stmts</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Binary</span>(_, <span class="kw-2">ref</span> <span class="ident">lhs</span>, <span class="kw-2">ref</span> <span class="ident">rhs</span>) <span class="op">|</span>
<span class="ident">ExprKind</span>::<span class="ident">Assign</span>(<span class="kw-2">ref</span> <span class="ident">lhs</span>, <span class="kw-2">ref</span> <span class="ident">rhs</span>) <span class="op">|</span>
<span class="ident">ExprKind</span>::<span class="ident">AssignOp</span>(_, <span class="kw-2">ref</span> <span class="ident">lhs</span>, <span class="kw-2">ref</span> <span class="ident">rhs</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">lhs</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">rhs</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Field</span>(<span class="kw-2">ref</span> <span class="ident">obj</span>, <span class="kw-2">ref</span> <span class="ident">field</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">obj</span>);
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="ident">field</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">TupField</span>(<span class="kw-2">ref</span> <span class="ident">obj</span>, _) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">obj</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Index</span>(<span class="kw-2">ref</span> <span class="ident">obj</span>, <span class="kw-2">ref</span> <span class="ident">idx</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">obj</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">idx</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Range</span>(<span class="kw-2">ref</span> <span class="ident">maybe_start</span>, <span class="kw-2">ref</span> <span class="ident">maybe_end</span>, _) <span class="op">=></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">start</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_start</span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">start</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">end</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_end</span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">end</span>);
}
}
<span class="ident">ExprKind</span>::<span class="ident">Path</span>(<span class="kw-2">ref</span> <span class="ident">maybe_qself</span>, <span class="kw-2">ref</span> <span class="ident">path</span>) <span class="op">=></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">qself</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_qself</span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="kw-2">&</span><span class="ident">qself</span>.<span class="ident">ty</span>);
}
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Break</span>(<span class="kw-2">ref</span> <span class="ident">maybe_label</span>, <span class="kw-2">ref</span> <span class="ident">maybe_expr</span>) <span class="op">=></span> {
<span class="ident">walk_opt_ident</span>(<span class="ident">visitor</span>, <span class="ident">maybe_label</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">expr</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_expr</span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
}
}
<span class="ident">ExprKind</span>::<span class="ident">Continue</span>(<span class="kw-2">ref</span> <span class="ident">maybe_label</span>) <span class="op">=></span> {
<span class="ident">walk_opt_ident</span>(<span class="ident">visitor</span>, <span class="ident">maybe_label</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Ret</span>(<span class="kw-2">ref</span> <span class="ident">maybe_expr</span>) <span class="op">=></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">expr</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_expr</span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
}
}
<span class="ident">ExprKind</span>::<span class="ident">Mac</span>(<span class="kw-2">ref</span> <span class="ident">mac</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_mac</span>(<span class="ident">mac</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Struct</span>(<span class="kw-2">ref</span> <span class="ident">path</span>, <span class="kw-2">ref</span> <span class="ident">fields</span>, <span class="kw-2">ref</span> <span class="ident">maybe_base</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
<span class="kw">for</span> <span class="kw-2">&</span><span class="ident">FieldValue</span> { <span class="kw-2">ref</span> <span class="ident">ident</span>, <span class="kw-2">ref</span> <span class="ident">expr</span>, .. } <span class="kw">in</span> <span class="ident">fields</span> {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="ident">ident</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</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">base</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_base</span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">base</span>);
}
}
<span class="ident">ExprKind</span>::<span class="ident">Repeat</span>(<span class="kw-2">ref</span> <span class="ident">value</span>, <span class="kw-2">ref</span> <span class="ident">times</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">value</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">times</span>);
}
<span class="ident">ExprKind</span>::<span class="ident">Box</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">|</span>
<span class="ident">ExprKind</span>::<span class="ident">AddrOf</span>(_, <span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">|</span>
<span class="ident">ExprKind</span>::<span class="ident">Paren</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">|</span>
<span class="ident">ExprKind</span>::<span class="ident">Try</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
}
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_foreign_item</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">foreign_item</span>: <span class="kw-2">&</span><span class="ident">ForeignItem</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="kw-2">&</span><span class="ident">foreign_item</span>.<span class="ident">ident</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="kw-2">&</span><span class="ident">foreign_item</span>.<span class="ident">attrs</span>);
<span class="kw">match</span> <span class="ident">foreign_item</span>.<span class="ident">node</span> {
<span class="ident">ForeignItemKind</span>::<span class="ident">Fn</span>(<span class="kw-2">ref</span> <span class="ident">decl</span>, <span class="kw-2">ref</span> <span class="ident">generics</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_fn_decl</span>(<span class="ident">decl</span>);
<span class="ident">visitor</span>.<span class="ident">visit_generics</span>(<span class="ident">generics</span>);
}
<span class="ident">ForeignItemKind</span>::<span class="ident">Static</span>(<span class="kw-2">ref</span> <span class="ident">ty</span>, _) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_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">"full"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_pat</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">pat</span>: <span class="kw-2">&</span><span class="ident">Pat</span>) {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">pat</span> {
<span class="ident">Pat</span>::<span class="ident">Wild</span> <span class="op">=></span> {}
<span class="ident">Pat</span>::<span class="ident">Ident</span>(_, <span class="kw-2">ref</span> <span class="ident">ident</span>, <span class="kw-2">ref</span> <span class="ident">maybe_pat</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="ident">ident</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">pat</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_pat</span> {
<span class="ident">visitor</span>.<span class="ident">visit_pat</span>(<span class="ident">pat</span>);
}
}
<span class="ident">Pat</span>::<span class="ident">Struct</span>(<span class="kw-2">ref</span> <span class="ident">path</span>, <span class="kw-2">ref</span> <span class="ident">field_pats</span>, _) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
<span class="kw">for</span> <span class="kw-2">&</span><span class="ident">FieldPat</span> { <span class="kw-2">ref</span> <span class="ident">ident</span>, <span class="kw-2">ref</span> <span class="ident">pat</span>, .. } <span class="kw">in</span> <span class="ident">field_pats</span> {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="ident">ident</span>);
<span class="ident">visitor</span>.<span class="ident">visit_pat</span>(<span class="ident">pat</span>);
}
}
<span class="ident">Pat</span>::<span class="ident">TupleStruct</span>(<span class="kw-2">ref</span> <span class="ident">path</span>, <span class="kw-2">ref</span> <span class="ident">pats</span>, _) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_pat</span>, <span class="ident">pats</span>);
}
<span class="ident">Pat</span>::<span class="ident">Path</span>(<span class="kw-2">ref</span> <span class="ident">maybe_qself</span>, <span class="kw-2">ref</span> <span class="ident">path</span>) <span class="op">=></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">qself</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_qself</span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="kw-2">&</span><span class="ident">qself</span>.<span class="ident">ty</span>);
}
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
}
<span class="ident">Pat</span>::<span class="ident">Tuple</span>(<span class="kw-2">ref</span> <span class="ident">pats</span>, _) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_pat</span>, <span class="ident">pats</span>);
}
<span class="ident">Pat</span>::<span class="ident">Box</span>(<span class="kw-2">ref</span> <span class="ident">pat</span>) <span class="op">|</span>
<span class="ident">Pat</span>::<span class="ident">Ref</span>(<span class="kw-2">ref</span> <span class="ident">pat</span>, _) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_pat</span>(<span class="ident">pat</span>);
}
<span class="ident">Pat</span>::<span class="ident">Lit</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
}
<span class="ident">Pat</span>::<span class="ident">Range</span>(<span class="kw-2">ref</span> <span class="ident">start</span>, <span class="kw-2">ref</span> <span class="ident">end</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">start</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">end</span>);
}
<span class="ident">Pat</span>::<span class="ident">Slice</span>(<span class="kw-2">ref</span> <span class="ident">start</span>, <span class="kw-2">ref</span> <span class="ident">maybe_mid</span>, <span class="kw-2">ref</span> <span class="ident">end</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_pat</span>, <span class="ident">start</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">mid</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_mid</span> {
<span class="ident">visitor</span>.<span class="ident">visit_pat</span>(<span class="ident">mid</span>);
}
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_pat</span>, <span class="ident">end</span>);
}
<span class="ident">Pat</span>::<span class="ident">Mac</span>(<span class="kw-2">ref</span> <span class="ident">mac</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_mac</span>(<span class="ident">mac</span>);
}
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_fn_decl</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">fn_decl</span>: <span class="kw-2">&</span><span class="ident">FnDecl</span>) {
<span class="kw">for</span> <span class="ident">input</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">fn_decl</span>.<span class="ident">inputs</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">input</span> {
<span class="ident">FnArg</span>::<span class="ident">SelfRef</span>(_, _) <span class="op">|</span>
<span class="ident">FnArg</span>::<span class="ident">SelfValue</span>(_) <span class="op">=></span> {}
<span class="ident">FnArg</span>::<span class="ident">Captured</span>(<span class="kw-2">ref</span> <span class="ident">pat</span>, <span class="kw-2">ref</span> <span class="ident">ty</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_pat</span>(<span class="ident">pat</span>);
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</span>);
}
<span class="ident">FnArg</span>::<span class="ident">Ignored</span>(<span class="kw-2">ref</span> <span class="ident">ty</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</span>);
}
}
}
<span class="ident">visitor</span>.<span class="ident">visit_fn_ret_ty</span>(<span class="kw-2">&</span><span class="ident">fn_decl</span>.<span class="ident">output</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_trait_item</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">trait_item</span>: <span class="kw-2">&</span><span class="ident">TraitItem</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="kw-2">&</span><span class="ident">trait_item</span>.<span class="ident">ident</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="kw-2">&</span><span class="ident">trait_item</span>.<span class="ident">attrs</span>);
<span class="kw">match</span> <span class="ident">trait_item</span>.<span class="ident">node</span> {
<span class="ident">TraitItemKind</span>::<span class="ident">Const</span>(<span class="kw-2">ref</span> <span class="ident">ty</span>, <span class="kw-2">ref</span> <span class="ident">maybe_expr</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</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">expr</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_expr</span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
}
}
<span class="ident">TraitItemKind</span>::<span class="ident">Method</span>(<span class="kw-2">ref</span> <span class="ident">method_sig</span>, <span class="kw-2">ref</span> <span class="ident">maybe_block</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_method_sig</span>(<span class="ident">method_sig</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">block</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_block</span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_stmt</span>, <span class="kw-2">&</span><span class="ident">block</span>.<span class="ident">stmts</span>);
}
}
<span class="ident">TraitItemKind</span>::<span class="ident">Type</span>(<span class="kw-2">ref</span> <span class="ident">bounds</span>, <span class="kw-2">ref</span> <span class="ident">maybe_ty</span>) <span class="op">=></span> {
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_ty_param_bound</span>, <span class="ident">bounds</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">ty</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">maybe_ty</span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</span>);
}
}
<span class="ident">TraitItemKind</span>::<span class="ident">Macro</span>(<span class="kw-2">ref</span> <span class="ident">mac</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_mac</span>(<span class="ident">mac</span>);
}
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_impl_item</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">impl_item</span>: <span class="kw-2">&</span><span class="ident">ImplItem</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="kw-2">&</span><span class="ident">impl_item</span>.<span class="ident">ident</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="kw-2">&</span><span class="ident">impl_item</span>.<span class="ident">attrs</span>);
<span class="kw">match</span> <span class="ident">impl_item</span>.<span class="ident">node</span> {
<span class="ident">ImplItemKind</span>::<span class="ident">Const</span>(<span class="kw-2">ref</span> <span class="ident">ty</span>, <span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</span>);
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
}
<span class="ident">ImplItemKind</span>::<span class="ident">Method</span>(<span class="kw-2">ref</span> <span class="ident">method_sig</span>, <span class="kw-2">ref</span> <span class="ident">block</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_method_sig</span>(<span class="ident">method_sig</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_stmt</span>, <span class="kw-2">&</span><span class="ident">block</span>.<span class="ident">stmts</span>);
}
<span class="ident">ImplItemKind</span>::<span class="ident">Type</span>(<span class="kw-2">ref</span> <span class="ident">ty</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</span>);
}
<span class="ident">ImplItemKind</span>::<span class="ident">Macro</span>(<span class="kw-2">ref</span> <span class="ident">mac</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_mac</span>(<span class="ident">mac</span>);
}
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_method_sig</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">method_sig</span>: <span class="kw-2">&</span><span class="ident">MethodSig</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_fn_decl</span>(<span class="kw-2">&</span><span class="ident">method_sig</span>.<span class="ident">decl</span>);
<span class="ident">visitor</span>.<span class="ident">visit_generics</span>(<span class="kw-2">&</span><span class="ident">method_sig</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">"full"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_stmt</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">stmt</span>: <span class="kw-2">&</span><span class="ident">Stmt</span>) {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">stmt</span> {
<span class="ident">Stmt</span>::<span class="ident">Local</span>(<span class="kw-2">ref</span> <span class="ident">local</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_local</span>(<span class="ident">local</span>);
}
<span class="ident">Stmt</span>::<span class="ident">Item</span>(<span class="kw-2">ref</span> <span class="ident">item</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_item</span>(<span class="ident">item</span>);
}
<span class="ident">Stmt</span>::<span class="ident">Expr</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">|</span>
<span class="ident">Stmt</span>::<span class="ident">Semi</span>(<span class="kw-2">ref</span> <span class="ident">expr</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">expr</span>);
}
<span class="ident">Stmt</span>::<span class="ident">Mac</span>(<span class="kw-2">ref</span> <span class="ident">details</span>) <span class="op">=></span> {
<span class="kw">let</span> (<span class="kw-2">ref</span> <span class="ident">mac</span>, _, <span class="kw-2">ref</span> <span class="ident">attrs</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">details</span>;
<span class="ident">visitor</span>.<span class="ident">visit_mac</span>(<span class="ident">mac</span>);
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="ident">attrs</span>);
}
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_local</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">local</span>: <span class="kw-2">&</span><span class="ident">Local</span>) {
<span class="ident">visitor</span>.<span class="ident">visit_pat</span>(<span class="kw-2">&</span><span class="ident">local</span>.<span class="ident">pat</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">ty</span>) <span class="op">=</span> <span class="ident">local</span>.<span class="ident">ty</span> {
<span class="ident">visitor</span>.<span class="ident">visit_ty</span>(<span class="ident">ty</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">init</span>) <span class="op">=</span> <span class="ident">local</span>.<span class="ident">init</span> {
<span class="ident">visitor</span>.<span class="ident">visit_expr</span>(<span class="ident">init</span>);
}
<span class="macro">walk_list</span><span class="macro">!</span>(<span class="ident">visitor</span>, <span class="ident">visit_attribute</span>, <span class="kw-2">&</span><span class="ident">local</span>.<span class="ident">attrs</span>);
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"full"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">walk_view_path</span><span class="op"><</span><span class="ident">V</span>: <span class="ident">Visitor</span><span class="op">></span>(<span class="ident">visitor</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">V</span>, <span class="ident">view_path</span>: <span class="kw-2">&</span><span class="ident">ViewPath</span>) {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">view_path</span> {
<span class="ident">ViewPath</span>::<span class="ident">Simple</span>(<span class="kw-2">ref</span> <span class="ident">path</span>, <span class="kw-2">ref</span> <span class="ident">maybe_ident</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
<span class="ident">walk_opt_ident</span>(<span class="ident">visitor</span>, <span class="ident">maybe_ident</span>);
}
<span class="ident">ViewPath</span>::<span class="ident">Glob</span>(<span class="kw-2">ref</span> <span class="ident">path</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
}
<span class="ident">ViewPath</span>::<span class="ident">List</span>(<span class="kw-2">ref</span> <span class="ident">path</span>, <span class="kw-2">ref</span> <span class="ident">items</span>) <span class="op">=></span> {
<span class="ident">visitor</span>.<span class="ident">visit_path</span>(<span class="ident">path</span>);
<span class="kw">for</span> <span class="kw-2">&</span><span class="ident">PathListItem</span> { <span class="kw-2">ref</span> <span class="ident">name</span>, <span class="kw-2">ref</span> <span class="ident">rename</span> } <span class="kw">in</span> <span class="ident">items</span> {
<span class="ident">visitor</span>.<span class="ident">visit_ident</span>(<span class="ident">name</span>);
<span class="ident">walk_opt_ident</span>(<span class="ident">visitor</span>, <span class="ident">rename</span>);
}
}
}
}
</pre>
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