Fix eBNF and handling of whitespace characters when not in a path

2 files changed, 116 insertions, 3 deletions

diff --git a/src/librustdoc/html/static/js/search.js b/src/librustdoc/html/static/js/search.js
index 35abce0903c..009775645f5 100644
--- a/src/librustdoc/html/static/js/search.js
+++ b/src/librustdoc/html/static/js/search.js
@@ -838,7 +838,13 @@ function initSearch(rawSearchIndex) {
                 throw ["Unexpected ", c];
             } else if (c === ":" && !isPathStart(parserState)) {
                 if (parserState.typeFilter !== null) {
-                    throw ["Unexpected ", ":"];
+                    throw [
+                        "Unexpected ",
+                        ":",
+                        " (expected path after type filter ",
+                        parserState.typeFilter + ":",
+                        ")",
+                    ];
                 } else if (query.elems.length === 0) {
                     throw ["Expected type filter before ", ":"];
                 } else if (query.literalSearch) {
@@ -853,6 +859,9 @@ function initSearch(rawSearchIndex) {
                 query.literalSearch = false;
                 foundStopChar = true;
                 continue;
+            } else if (isWhitespace(c)) {
+                skipWhitespace(parserState);
+                continue;
             }
             if (!foundStopChar) {
                 let extra = "";
@@ -983,7 +992,7 @@ function initSearch(rawSearchIndex) {
      * path = ident *(DOUBLE-COLON/{WS} ident) [!]
      * slice = OPEN-SQUARE-BRACKET [ nonempty-arg-list ] CLOSE-SQUARE-BRACKET
      * arg = [type-filter *WS COLON *WS] (path [generics] / slice)
-     * type-sep = COMMA *(COMMA)
+     * type-sep = *WS COMMA *(COMMA)
      * nonempty-arg-list = *(type-sep) arg *(type-sep arg) *(type-sep)
      * generics = OPEN-ANGLE-BRACKET [ nonempty-arg-list ] *(type-sep)
      *            CLOSE-ANGLE-BRACKET
diff --git a/tests/rustdoc-js-std/parser-errors.js b/tests/rustdoc-js-std/parser-errors.js
index 66b0e516b2b..b32bfea5439 100644
--- a/tests/rustdoc-js-std/parser-errors.js
+++ b/tests/rustdoc-js-std/parser-errors.js
@@ -366,7 +366,7 @@ const PARSED = [
         original: "a<>  :",
         returned: [],
         userQuery: "a<>  :",
-        error: 'Expected `,`, `:` or `->` after `>`, found ` `',
+        error: 'Unexpected `<` in type filter (before `:`)',
     },
     {
         query: "mod : :",
@@ -440,4 +440,108 @@ const PARSED = [
         userQuery: "a<",
         error: "Unclosed `<`",
     },
+    {
+        query: "p<x> , y",
+        elems: [
+            {
+                name: "p",
+                fullPath: ["p"],
+                pathWithoutLast: [],
+                pathLast: "p",
+                generics: [
+                    {
+                        name: "x",
+                        fullPath: ["x"],
+                        pathWithoutLast: [],
+                        pathLast: "x",
+                        generics: [],
+                        typeFilter: -1,
+                    },
+                ],
+                typeFilter: -1,
+            },
+            {
+                name: "y",
+                fullPath: ["y"],
+                pathWithoutLast: [],
+                pathLast: "y",
+                generics: [],
+                typeFilter: -1,
+            },
+        ],
+        foundElems: 2,
+        original: "p<x> , y",
+        returned: [],
+        userQuery: "p<x> , y",
+        error: null,
+    },
+    {
+        query: "p<x , y>",
+        elems: [
+            {
+                name: "p",
+                fullPath: ["p"],
+                pathWithoutLast: [],
+                pathLast: "p",
+                generics: [
+                    {
+                        name: "x",
+                        fullPath: ["x"],
+                        pathWithoutLast: [],
+                        pathLast: "x",
+                        generics: [],
+                        typeFilter: -1,
+                    },
+                    {
+                        name: "y",
+                        fullPath: ["y"],
+                        pathWithoutLast: [],
+                        pathLast: "y",
+                        generics: [],
+                        typeFilter: -1,
+                    },
+                ],
+                typeFilter: -1,
+            },
+        ],
+        foundElems: 1,
+        original: "p<x , y>",
+        returned: [],
+        userQuery: "p<x , y>",
+        error: null,
+    },
+    {
+        query: "p ,x , y",
+        elems: [
+            {
+                name: "p",
+                fullPath: ["p"],
+                pathWithoutLast: [],
+                pathLast: "p",
+                generics: [],
+                typeFilter: -1,
+            },
+            {
+                name: "x",
+                fullPath: ["x"],
+                pathWithoutLast: [],
+                pathLast: "x",
+                generics: [],
+                typeFilter: -1,
+            },
+            {
+                name: "y",
+                fullPath: ["y"],
+                pathWithoutLast: [],
+                pathLast: "y",
+                generics: [],
+                typeFilter: -1,
+            },
+        ],
+        foundElems: 3,
+        original: "p ,x , y",
+        returned: [],
+        userQuery: "p ,x , y",
+        error: null,
+    },
 ];