[Webkit-unassigned] [Bug 243596] New: [JSC] The JSONP parser for the fast path should be more idiomatic

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=243596

            Bug ID: 243596
           Summary: [JSC] The JSONP parser for the fast path should be
                    more idiomatic
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: yijia_huang at apple.com

JOSNP is a super legacy feature. And the current JSONP parser for the fast path doesn't lines up with JSONP idioms.

Patterns should not trigger JSONP fast path:
* "const" and "let"
* "var foo", "x.foo =", and "x["foo"] ="

Reasonable Patterns for JSONP fast path:
* "foo(<JSON>)", "x.foo(<JSON>)", and "x["foo"](<JSON>)"
* One expression statement that ends with a call

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