support nullish coalescing operator (#4678)

2021-02-23 21:57:11 +00:00
parent d68d155f93
commit c885660347
16 changed files with 177 additions and 36 deletions
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -107,7 +107,8 @@ var OPERATORS = makePredicate([
    "^=",
    "&=",
    "&&",
-    "||"
+    "||",
+    "??",
 ]);

 var NEWLINE_CHARS = "\n\r\u2028\u2029";
@@ -662,6 +663,7 @@ var PRECEDENCE = function(a, ret) {
    }
    return ret;
 }([
+    ["??"],
    ["||"],
    ["&&"],
    ["|"],