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symbolType4.ts(2,1): error TS2356: An arithmetic operand must be of type 'any', 'number', 'bigint' or an enum type.
symbolType4.ts(3,1): error TS2356: An arithmetic operand must be of type 'any', 'number', 'bigint' or an enum type.
==== symbolType4.ts (2 errors) ====
var s = Symbol.for("postfix");
s++;
~
!!! error TS2356: An arithmetic operand must be of type 'any', 'number', 'bigint' or an enum type.
s--;
~
!!! error TS2356: An arithmetic operand must be of type 'any', 'number', 'bigint' or an enum type.
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