doc pages: add the ability to search unknown types

quodlibetor · Manishearth · commit 17691af38d68 · 2016-02-16T04:10:30.000+05:30
This enables `*` in all type positions in doc searches, which I often want in order to find functions that create or convert specific types (e.g. `* -> vec`) but I don't actually know what kinds of input they expect. I actually started working on this because of #31598, but I've wanted it several times when exploring new crates.
diff --git a/src/librustdoc/html/layout.rs b/src/librustdoc/html/layout.rs
@@ -122,7 +122,7 @@ r##"<!DOCTYPE html>
 
                 <p>
                     Search functions by type signature (e.g.
-                    <code>vec -> usize</code>)
+                    <code>vec -> usize</code> or <code>* -> vec</code>)
                 </p>
             </div>
         </div>
diff --git a/src/librustdoc/html/static/main.js b/src/librustdoc/html/static/main.js
@@ -280,7 +280,7 @@
                 var parts = val.split("->").map(trimmer);
                 var input = parts[0];
                 // sort inputs so that order does not matter
-                var inputs = input.split(",").map(trimmer).sort();
+                var inputs = input.split(",").map(trimmer).sort().toString();
                 var output = parts[1];
 
                 for (var i = 0; i < nSearchWords; ++i) {
@@ -296,8 +296,8 @@
 
                     // allow searching for void (no output) functions as well
                     var typeOutput = type.output ? type.output.name : "";
-                    if (inputs.toString() === typeInputs.toString() &&
-                        output == typeOutput) {
+                    if ((inputs === "*" || inputs === typeInputs.toString()) &&
+                        (output === "*" || output == typeOutput)) {
                         results.push({id: i, index: -1, dontValidate: true});
                     }
                 }
