convert various input as pattern to a vector used in tokens_select, tokens_compound and kwic.
pattern2id(pattern, types, valuetype, case_insensitive, concatenator = "_",
remove_unigram = FALSE)a character vector, list of character vectors, dictionary, collocations, or dfm. See pattern for details.
the type of pattern matching: "glob" for
"glob"-style wildcard expressions; "regex" for regular expressions;
or "fixed" for exact matching. See valuetype for details.
ignore the case of dictionary values if TRUE
concatenator that join multi-word expression in tokens object
ignore single-word patterns if TRUE
regex2id