Skip to main content Module strings Copy item path Source FmtSpec 🔒 Parsed format specifier from a sprintf format string. StringError Structured error type for string operations. __BUILTIN_REG_BUILTIN_AGREP 🔒 __BUILTIN_REG_BUILTIN_AGREPL 🔒 __BUILTIN_REG_BUILTIN_AS_RAW 🔒 __BUILTIN_REG_BUILTIN_BASENAME 🔒 __BUILTIN_REG_BUILTIN_CASEFOLD 🔒 __BUILTIN_REG_BUILTIN_CHARTR 🔒 __BUILTIN_REG_BUILTIN_CHAR_TO_RAW 🔒 __BUILTIN_REG_BUILTIN_DEPARSE 🔒 __BUILTIN_REG_BUILTIN_DEPARSE1 🔒 __BUILTIN_REG_BUILTIN_DIRNAME 🔒 __BUILTIN_REG_BUILTIN_DQUOTE 🔒 __BUILTIN_REG_BUILTIN_ENC2NATIVE 🔒 __BUILTIN_REG_BUILTIN_ENC2UTF8 🔒 __BUILTIN_REG_BUILTIN_ENCODE_STRING 🔒 __BUILTIN_REG_BUILTIN_ENCODING 🔒 __BUILTIN_REG_BUILTIN_ENDS_WITH 🔒 __BUILTIN_REG_BUILTIN_FORMAT_C 🔒 __BUILTIN_REG_BUILTIN_FORMAT_PVAL 🔒 __BUILTIN_REG_BUILTIN_GETTEXT 🔒 __BUILTIN_REG_BUILTIN_GETTEXTF 🔒 __BUILTIN_REG_BUILTIN_GLOB2RX 🔒 __BUILTIN_REG_BUILTIN_GREGEXPR 🔒 __BUILTIN_REG_BUILTIN_GREP 🔒 __BUILTIN_REG_BUILTIN_GREPL 🔒 __BUILTIN_REG_BUILTIN_GSUB 🔒 __BUILTIN_REG_BUILTIN_ICONV 🔒 __BUILTIN_REG_BUILTIN_INT_TO_UTF8 🔒 __BUILTIN_REG_BUILTIN_IS_RAW 🔒 __BUILTIN_REG_BUILTIN_MAKE_NAMES 🔒 __BUILTIN_REG_BUILTIN_MAKE_UNIQUE 🔒 __BUILTIN_REG_BUILTIN_NGETTEXT 🔒 __BUILTIN_REG_BUILTIN_NZCHAR 🔒 __BUILTIN_REG_BUILTIN_PRETTY_NUM 🔒 __BUILTIN_REG_BUILTIN_RAW 🔒 __BUILTIN_REG_BUILTIN_RAW_SHIFT 🔒 __BUILTIN_REG_BUILTIN_RAW_TO_CHAR 🔒 __BUILTIN_REG_BUILTIN_REGEXEC 🔒 __BUILTIN_REG_BUILTIN_REGEXPR 🔒 __BUILTIN_REG_BUILTIN_REGMATCHES 🔒 __BUILTIN_REG_BUILTIN_REGMATCHES_ASSIGN 🔒 __BUILTIN_REG_BUILTIN_SPRINTF 🔒 __BUILTIN_REG_BUILTIN_SQUOTE 🔒 __BUILTIN_REG_BUILTIN_STARTS_WITH 🔒 __BUILTIN_REG_BUILTIN_STRREP 🔒 __BUILTIN_REG_BUILTIN_STRSPLIT 🔒 __BUILTIN_REG_BUILTIN_STRTOI 🔒 __BUILTIN_REG_BUILTIN_STRTRIM 🔒 __BUILTIN_REG_BUILTIN_STRWRAP 🔒 __BUILTIN_REG_BUILTIN_SUB 🔒 __BUILTIN_REG_BUILTIN_SUBSTR 🔒 __BUILTIN_REG_BUILTIN_SUBSTR_ASSIGN 🔒 __BUILTIN_REG_BUILTIN_SYS_GETLOCALE 🔒 __BUILTIN_REG_BUILTIN_SYS_SETLOCALE 🔒 __BUILTIN_REG_BUILTIN_TOLOWER 🔒 __BUILTIN_REG_BUILTIN_TOUPPER 🔒 __BUILTIN_REG_BUILTIN_TO_STRING 🔒 __BUILTIN_REG_BUILTIN_TRIMWS 🔒 __BUILTIN_REG_BUILTIN_TYPE_CONVERT 🔒 __BUILTIN_REG_BUILTIN_URLDECODE 🔒 __BUILTIN_REG_BUILTIN_URLENCODE 🔒 __BUILTIN_REG_BUILTIN_UTF8_TO_INT 🔒 __INTERP_REG_INTERP_DPUT 🔒 approximate_contains 🔒 Check whether haystack contains a substring approximately matching needle
within the given maximum edit distance. Uses a sliding-window approach:
for each window of length needle.len() +/- max_dist, compute Levenshtein distance. build_fixed_searcher 🔒 Build an AhoCorasick automaton for a single fixed pattern, optionally case-insensitive.
This builds the automaton once and amortizes the cost across many haystack searches. build_regex 🔒 builtin_agrep 🔒 Approximate grep: search for approximate pattern matches in a character vector. builtin_agrepl 🔒 Approximate grepl: test whether a pattern approximately matches each element. builtin_as_raw 🔒 as.raw(x) — coerce to raw (byte) values (0-255), truncating to lowest byte.builtin_basename 🔒 Extract the file name from paths. builtin_casefold 🔒 Convert case of a character vector. builtin_char_to_raw 🔒 Convert a character string to a raw (byte) vector. builtin_chartr 🔒 Translate characters in strings (character-by-character substitution). builtin_deparse 🔒 Convert an R expression or value to its string representation. builtin_deparse1 🔒 Single-string deparse (R 4.0+). Collapses multi-line deparse output. builtin_dirname 🔒 Extract the directory part from paths. builtin_dquote 🔒 Wrap strings in double (typographic) quotes. builtin_enc2native 🔒 Convert character vector to native encoding (passthrough in miniR). builtin_enc2utf8 🔒 Convert character vector to UTF-8 encoding (passthrough in miniR). builtin_encode_string 🔒 Encode a character string with optional quoting, width, and justification. builtin_encoding 🔒 Report the encoding of character strings. builtin_ends_with 🔒 Test whether strings end with a given suffix. builtin_format_c 🔒 Formatted printing of numbers and strings, similar to C’s printf family. builtin_format_pval 🔒 Format p-values for display, showing e.g. “< 2.2e-16” for very small values. builtin_gettext 🔒 Translate a message (i18n stub — returns the message unchanged). builtin_gettextf 🔒 Format and translate a message (i18n stub — delegates to sprintf). builtin_glob2rx 🔒 Convert a glob (wildcard) pattern to a regular expression. builtin_gregexpr 🔒 Find all matches of a pattern in each element of a character vector. builtin_grep 🔒 Search for pattern matches in a character vector. builtin_grepl 🔒 Test whether a pattern matches each element of a character vector. builtin_gsub 🔒 Replace all occurrences of a pattern in character strings. builtin_iconv 🔒 Convert character strings between encodings. builtin_int_to_utf8 🔒 Convert integer Unicode code points to a UTF-8 string. builtin_is_raw 🔒 is.raw(x) — test if argument is a raw vector.builtin_make_names 🔒 Make syntactically valid R names from character strings. builtin_make_unique 🔒 Make character strings unique by appending sequence numbers to duplicates. builtin_ngettext 🔒 Translate a message with singular/plural forms (i18n stub). builtin_nzchar 🔒 Test whether character strings are non-empty. builtin_pretty_num 🔒 Format numbers with separators for readability (e.g., thousand separators). builtin_raw 🔒 raw(length) — create a raw (byte) vector of zeros.builtin_raw_shift 🔒 rawShift(x, n) — bitwise shift of raw (byte) values.
Positive n shifts left, negative n shifts right.builtin_raw_to_char 🔒 Convert a raw (byte) vector to a character string. builtin_regexec 🔒 Match a pattern with capture groups against a character vector. builtin_regexpr 🔒 Find the first match of a pattern in each element of a character vector. builtin_regmatches 🔒 Extract matched substrings from regexpr/gregexpr results. builtin_regmatches_assign 🔒 Replace matched substrings using regexpr/gregexpr match data. builtin_sprintf 🔒 Format strings using C-style format specifiers, vectorized over arguments. builtin_squote 🔒 Wrap strings in single (typographic) quotes. builtin_starts_with 🔒 Test whether strings start with a given prefix. builtin_strrep 🔒 Repeat each element of a character vector a specified number of times. builtin_strsplit 🔒 Split strings by a pattern or fixed delimiter. builtin_strtoi 🔒 Convert strings to integers using a specified base (radix). builtin_strtrim 🔒 Trim character strings to a specified display width. builtin_strwrap 🔒 Wrap character strings to a specified width. builtin_sub 🔒 Replace the first occurrence of a pattern in character strings. builtin_substr 🔒 Extract substrings from character strings. builtin_substr_assign 🔒 Replace substrings in character strings. builtin_sys_getlocale 🔒 Get the current locale setting (stub — returns “C” locale). builtin_sys_setlocale 🔒 Set the locale (stub — accepts but ignores the setting). builtin_to_string 🔒 Collapse a vector into a single comma-separated string. builtin_tolower 🔒 Convert strings to lower case. builtin_toupper 🔒 Convert strings to upper case. builtin_trimws 🔒 Remove leading and/or trailing whitespace from strings. builtin_type_convert 🔒 Auto-convert character vector to appropriate type. builtin_urldecode 🔒 Decode percent-encoded URL strings. builtin_urlencode 🔒 Percent-encode URL strings per RFC 3986. builtin_utf8_to_int 🔒 Convert a UTF-8 string to integer Unicode code points. collect_fmt_specs 🔒 Collect the format specifiers from a format string, returning a list of
(FmtSpec, arg_index) pairs (0-based among the data args, i.e. excluding fmt). convert_replacement 🔒 Convert R-style replacement backreferences (\1, \2) to regex crate style ($1, $2) fixed_gsub 🔒 Replace all occurrences of needle in haystack with replacement. fixed_split 🔒 Split haystack on all occurrences of needle. format_g 🔒 Format using %g/%G: use shorter of %f and %e, removing trailing zeros. format_scientific 🔒 Format a float in scientific notation matching R’s output (two-digit exponent minimum). get_regex_opts 🔒 Extract common regex options from named args: fixed, ignore.case, perl iconv_one 🔒 Convert a single string between encodings using bstr for byte-level access. insert_marks 🔒 Insert big_mark every 3 digits before the decimal point and small_mark
every 3 digits after the decimal point. interp_dput 🔒 Write a deparsed representation of an R object to stdout. levenshtein_distance 🔒 Compute the Levenshtein edit distance between two strings.
Uses a single-row DP approach (O(min(m,n)) space). normalize_encoding_name 🔒 Normalize an encoding name to a canonical form. parse_fmt_spec 🔒 Parse a format specifier starting after ‘%’. Returns (FmtSpec, chars consumed). parse_max_distance 🔒 Parse R’s max.distance argument for agrep/agrepl.
R accepts either a single numeric (fraction of pattern length if < 1, absolute if >= 1)
or a named list. We support the simple numeric case. sprintf_one 🔒 Format one string from the format template, using element elem_idx from
each data-arg vector (with recycling). translate_pcre_to_rust 🔒 Build a compiled regex from a pattern string, respecting fixed and ignore.case options.
Returns Err(RError) if the pattern is invalid regex.
Translate R/PCRE regex patterns to Rust regex syntax. trim_to_width 🔒 Trim a string to at most max_width display columns.