enh(cpp) Recognize priority_queue, pair as containers (#2541)

Author: Reqwey

CHANGES.md

@@ -26,6 +26,7 @@ Language Improvements:
 - enh(typescript) add setInterval, setTimeout, clearInterval, clearTimeout (#2514) [Josh Goebel][]
 - enh(javascript) add setInterval, setTimeout, clearInterval, clearTimeout (#2514) [Vania Kucher][]
 - enh(cpp) add `pair`, `make_pair`, `priority_queue` as built-ins (#2538) [Hankun Lin][]
+- enh(cpp) recognize `priority_queue` `pair` as cpp containers (#2541) [Hankun Lin][]
 - fix(javascript) prevent `set` keyword conflicting with setTimeout, etc. (#2514) [Vania Kucher][]
 - fix(cpp) Fix highlighting of unterminated raw strings (#2261) [David Benjamin][]
 - fix(javascript) `=>` function with nested `()` in params now works (#2502) [Josh Goebel][]

src/languages/c-like.js

@@ -212,8 +212,8 @@ export default function(hljs) {
       EXPRESSION_CONTAINS,
       [
       PREPROCESSOR,
-      {
-        begin: '\\b(deque|list|queue|stack|vector|map|set|bitset|multiset|multimap|unordered_map|unordered_set|unordered_multiset|unordered_multimap|array)\\s*<', end: '>',
+      { // containers: ie, `vector <int> rooms (9);`
+        begin: '\\b(deque|list|queue|priority_queue|pair|stack|vector|map|set|bitset|multiset|multimap|unordered_map|unordered_set|unordered_multiset|unordered_multimap|array)\\s*<', end: '>',
         keywords: CPP_KEYWORDS,
         contains: ['self', CPP_PRIMITIVE_TYPES]
       },