Member predicate AssignExpr::getUnderlyingValue

Gets the innermost expression that this expression evaluates to.

Examples:

• a parenthesised expression (e): the underlying value of e.
• a sequence expression e1, e2: the underlying value of e2.
• an assignment expression v = e: the underlying value of e.
• a TypeScript type assertion e as T: the underlying value of e.
• any other expression: the expression itself.

Also see getUnderlyingReference and stripParens.