exprChildrenOrEmptyList: Return the Children of an Expression or the Empty List if there are None
Description
Internal tool function that returns the children expressions of an R expression or the
empty list if there are no children, i.e. if the expression is atomic or NULL.
If the expression is a "function" expression, i.e. an expression that would evaluate
to a function, exprChildrenOrEmptyList will return the function body expression
as the only child.
Usage
exprChildrenOrEmptyList(expr)
Arguments
expr
The expression to return the children for.
Value
The expression's children as a list, or the empty list if there are none.