12.3.3.19 General rules for simple expression

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12.3.3.19 General rules for simple expressions
The following rule applies to these kinds of expressions: literals (?4.5.1),
simple names (?4.5.2), member
access expressions (?4.5.4), non-indexed base access expressions (?4.5.8),
and typeof expressions
(?4.5.11).
?The definite assignment state of v at the end of such an expression is
the same as the definite
assignment state of v at the beginning of the expression.