find_node_indices: Find Node Indices in an RStatic Object
In nick-ulle/ast: Low-level Static Analysis Tools for R Code

Description Usage Arguments Details Value See Also Examples

This function traverses the given RStatic object and returns a list of indices for all descendants that satisfy the given test function.

1 2	find_node_indices(node, test, ..., recursive = TRUE, initial = list(), index = integer(0))

`node`	(ASTNode) The RStatic object to search.
`test`	(function) The test function, which should accept an rstatic object to check as its first argument and return a scalar logical.
`...`	Additional arguments to the test function.
`recursive`	(logical) Search recursively in matching nodes?
`initial`	(list) Initial list of indices for matching nodes.
`index`	(integer) The index of `node`.

All indices are relative to node, unless index is supplied.

Note that node itself is not tested.

A list of indices for matching nodes.

find_nodes()

ast = quote_ast(
  function(x, y) {
    x = x + y
    function() x
  })

find_node_indices(ast, is, "Function")

find_node_indices(ast, is_symbol, "x")