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Rename father parameter/field to parent in BFS/DFS calls#208

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schochastics:fix-igraph
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Rename father parameter/field to parent in BFS/DFS calls#208
schochastics wants to merge 1 commit into
thomasp85:mainfrom
schochastics:fix-igraph

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@schochastics schochastics commented May 22, 2026

Hi Thomas,

In the github version of igraph, we have now advanced all deprecation levels and some functions/parameters are going to be defunct on CRAN eventually.

bfs(father = ) and dfs(father = ) were deprecated in igraph 2.2.0 in favour of parent =.
Both advanced from deprecate_warn to deprecate_stop in #2634.

tidygraph::map_bfs*() / map_dfs*() call igraph::bfs(..., father = TRUE). The same call breaks the dci, ggraph, and scistreer downstream packages.

This PR replaces all uses of "father" with "parent"

(also closes #205)

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Deprecated 'father' feature in igraph

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