# bad inputs give informative warnings Code t <- select_topics("x + ", topics) Condition Error: ! In '_pkgdown.yml', topic must be valid R code x Not 'x + ' Code t <- select_topics("y", topics) Condition Error: ! In '_pkgdown.yml', topic must be a known topic name or alias x Not 'y' Code t <- select_topics("paste(1)", topics) Condition Error: ! In '_pkgdown.yml', topic must be a known selector function x Not 'paste(1)' Caused by error in `paste()`: ! could not find function "paste" Code t <- select_topics("starts_with", topics) Condition Error: ! In '_pkgdown.yml', topic must be a known topic name or alias x Not 'starts_with' Code t <- select_topics("1", topics) Condition Error: ! In '_pkgdown.yml', topic must be a string or function call x Not '1' Code t <- select_topics("starts_with('y')", topics, check = TRUE) Condition Error in `select_topics()`: ! No topics matched in '_pkgdown.yml'. No topics selected. # can select by name or alias Code select_topics("a4", topics) Condition Error: ! In '_pkgdown.yml', topic must be a known topic name or alias x Not 'a4' Code select_topics("c::a", topics) Condition Error: ! In '_pkgdown.yml', topic must be a known topic name or alias x Not 'c::a' # an unmatched selection generates a warning Code select_topics(c("a", "starts_with('unmatched')"), topics, check = TRUE) Condition Error: ! In '_pkgdown.yml', topic must match a function or concept x Not 'starts_with(\'unmatched\')'
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