refactor: Replace _impl aliases with explicit wrappers in R/trees.R

[Copilot]

Replaces direct _impl function aliases with explicit wrapper functions for improved code consistency and maintainability.

Changes:

• is_forest <- is_forest_impl → explicit wrapper forwarding graph, mode, details
• to_prufer <- to_prufer_impl → explicit wrapper forwarding graph

Pattern:

# Before
is_forest <- is_forest_impl

# After
is_forest <- function(graph, mode = c("out", "in", "all", "total"), details = FALSE) {
  is_forest_impl(
    graph = graph,
    mode = mode,
    details = details
  )
}

Follows the established convention from R/assortativity.R and other files. All arguments forwarded explicitly without using ....

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Replace _impl aliases in R/trees.R</issue_title>
<issue_description>Goal
Review the code in R/trees.R and replace all direct _impl function aliases with explicit wrapper functions.

Functions to update:

• is_forest <- is_forest_impl
• to_prufer <- to_prufer_impl

Instructions

1. Review the code to understand the function signatures
2. Create explicit wrapper functions that forward to the _impl functions
3. Forward each argument individually and explicitly using arg = arg notation
4. Do not use ... unless the _impl function itself uses ...

Pattern
Replace direct aliasing like:

func_name <- func_name_impl

With an explicit wrapper:

func_name <- function(arg1, arg2, ...) {
  func_name_impl(
    arg1 = arg1,
    arg2 = arg2,
    ...
  )
}

File
R/trees.R</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Replace _impl aliases in R/trees.R #2367

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.