[Bug]: Singleton types with parenthesis cannot be parsed in local variable declaration in some cases

[lochana-chathura]

Description

$subject.

Consider the below sample.

+2|-4|"s"|"a" a1 = 2; // ok

+2|-4|"s"|("a") a2 = 2; // ok

+2|(-4) a3 = 2; // ok

(+2)|(-4) a4 = 2; // ok

function foo() {
    +2|-4|"s"|"a" b1 = 2; // ok

    +2|-4|"s"|("a") b2 = 2; // cannot parse

    +2|(-4) b3 = 2; // cannot parse

    (+2)|(-4) b4 = 2; // ok
}

Affected Version(s)

SL 2201.7.1 at least