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Module `std.string`

String handling functions.


Category	Functions
Searching	`column` `indexOf` `indexOfAny` `indexOfNeither` `lastIndexOf` `lastIndexOfAny` `lastIndexOfNeither`
Comparison	`isNumeric`
Mutation	`capitalize`
Pruning and Filling	`center` `chomp` `chompPrefix` `chop` `detabber` `detab` `entab` `entabber` `leftJustify` `outdent` `rightJustify` `strip` `stripLeft` `stripRight` `wrap`
Substitution	`abbrev` `soundex` `soundexer` `succ` `tr` `translate`
Miscellaneous	`assumeUTF` `fromStringz` `lineSplitter` `representation` `splitLines` `toStringz`

Objects of types string, wstring, and dstring are value types and cannot be mutated element-by-element. For using mutation during building strings, use char[], wchar[], or dchar[]. The xxxstring types are preferable because they don't exhibit undesired aliasing, thus making code more robust.

The following functions are publicly imported:


Module	Functions
*Publicly imported functions*
std.algorithm	`cmp` `count` `endsWith` `startsWith`
std.array	`join` `replace` `replaceInPlace` `split` `empty`
std.format	`format` `sformat`
std.uni	`icmp` `toLower` `toLowerInPlace` `toUpper` `toUpperInPlace`

There is a rich set of functions for string handling defined in other modules. Functions related to Unicode and ASCII are found in std.uni and std.ascii, respectively. Other functions that have a wider generality than just strings can be found in std.algorithm and std.range.

Functions

Name	Description
`abbrev(values)`	Construct an associative array consisting of all abbreviations that uniquely map to the strings in values.
`assumeUTF(arr)`	Assume the given array of integers `arr` is a well-formed UTF string and return it typed as a UTF string.
`capitalize(input)`	Capitalize the first character of `s` and convert the rest of `s` to lowercase.
`center(s, width, fillChar)`	Center `s` in a field `width` characters wide. `fillChar` is the character that will be used to fill up the space in the field that `s` doesn't fill.
`centerJustifier(r, width, fillChar)`	Center justify `r` in a field `width` characters wide. `fillChar` is the character that will be used to fill up the space in the field that `r` doesn't fill.
`chomp(str)`	If `str` ends with `delimiter`, then `str` is returned without `delimiter` on its end. If it `str` does not end with `delimiter`, then it is returned unchanged.
`chompPrefix(str, delimiter)`	If `str` starts with `delimiter`, then the part of `str` following `delimiter` is returned. If `str` does not start with
`chop(str)`	Returns `str` without its last character, if there is one. If `str` ends with `"\r\n"`, then both are removed. If `str` is empty, then it is returned unchanged.
`column(str, tabsize)`	Compute column number at the end of the printed form of the string, assuming the string starts in the leftmost column, which is numbered starting from 0.
`detab(s, tabSize)`	Replace each tab character in `s` with the number of spaces necessary to align the following character at the next tab stop.
`detabber(r, tabSize)`	Replace each tab character in `r` with the number of spaces necessary to align the following character at the next tab stop.
`entab(s, tabSize)`	Replaces spaces in `s` with the optimal number of tabs. All spaces and tabs at the end of a line are removed.
`entabber(r, tabSize)`	Replaces spaces in range `r` with the optimal number of tabs. All spaces and tabs at the end of a line are removed.
`fromStringz(cString)`
`indexOf(s, c, cs)`	Searches for character in range.
`indexOf(s, sub)`	Searches for substring in `s`.
`indexOfAny(haystack, needles, cs)`	Returns the index of the first occurrence of any of the elements in `needles` in `haystack`. If no element of `needles` is found, then `-1` is returned. The `startIdx` slices `haystack` in the following way `haystack[startIdx .. $]`. `startIdx` represents a codeunit index in `haystack`. If the sequence ending at `startIdx` does not represent a well formed codepoint, then a `UTFException` may be thrown.
`indexOfNeither(haystack, needles, cs)`	Returns the index of the first occurrence of any character not an elements in `needles` in `haystack`. If all element of `haystack` are element of `needles` `-1` is returned.
`isNumeric(s, bAllowSep)`	Takes a string `s` and determines if it represents a number. This function also takes an optional parameter, `bAllowSep`, which will accept the separator characters `','` and `_` within the string. But these characters should be stripped from the string before using any of the conversion functions like `to!int()`, `to!float()`, and etc else an error will occur.
`lastIndexOf(s, c, cs)`
`lastIndexOf(s, sub, cs)`
`lastIndexOfAny(haystack, needles, cs)`	Returns the index of the last occurrence of any of the elements in `needles` in `haystack`. If no element of `needles` is found, then `-1` is returned. The `stopIdx` slices `haystack` in the following way `s[0 .. stopIdx]`. `stopIdx` represents a codeunit index in `haystack`. If the sequence ending at `startIdx` does not represent a well formed codepoint, then a `UTFException` may be thrown.
`lastIndexOfNeither(haystack, needles, cs)`	Returns the last index of the first occurence of any character that is not an elements in `needles` in `haystack`. If all element of `haystack` are element of `needles` `-1` is returned.
`leftJustifier(r, width, fillChar)`	Left justify `s` in a field `width` characters wide. `fillChar` is the character that will be used to fill up the space in the field that `s` doesn't fill.
`leftJustify(s, width, fillChar)`	Left justify `s` in a field `width` characters wide. `fillChar` is the character that will be used to fill up the space in the field that `s` doesn't fill.
`lineSplitter(r)`	Split an array or slicable range of characters into a range of lines using `'\r'`, `'\n'`, `'\v'`, `'\f'`, `"\r\n"`, `lineSep`, `paraSep` and `'\u0085'` (NEL) as delimiters. If `keepTerm` is set to `Yes.keepTerminator`, then the delimiter is included in the slices returned.
`makeTrans(from, to)`	Do same thing as `makeTransTable` but allocate the translation table on the GC heap.
`makeTransTable(from, to)`	Construct 256 character translation table, where characters in from[] are replaced by corresponding characters in to[].
`outdent(str)`	Removes one level of indentation from a multi-line string.
`outdent(lines)`	Removes one level of indentation from an array of single-line strings.
`representation(s)`	Returns the representation of a string, which has the same type as the string except the character type is replaced by `ubyte`, `ushort`, or `uint` depending on the character width.
`rightJustifier(r, width, fillChar)`	Right justify `s` in a field `width` characters wide. `fillChar` is the character that will be used to fill up the space in the field that `s` doesn't fill.
`rightJustify(s, width, fillChar)`	Right justify `s` in a field `width` characters wide. `fillChar` is the character that will be used to fill up the space in the field that `s` doesn't fill.
`soundex(str, buffer)`	Like `soundexer`, but with different parameters and return value.
`soundexer(str)`	Soundex algorithm.
`splitLines(s, keepTerm)`	Split `s` into an array of lines according to the unicode standard using `'\r'`, `'\n'`, `"\r\n"`, `lineSep`, `paraSep`, `U+0085` (NEL), `'\v'` and `'\f'` as delimiters. If `keepTerm` is set to `KeepTerminator.yes`, then the delimiter is included in the strings returned.
`strip(str)`	Strips both leading and trailing whitespace (as defined by `isWhite`) or as specified in the second argument.
`stripLeft(input)`	Strips leading whitespace (as defined by `isWhite`) or as specified in the second argument.
`stripRight(str)`	Strips trailing whitespace (as defined by `isWhite`) or as specified in the second argument.
`succ(s)`	Return string that is the 'successor' to s[]. If the rightmost character is a-zA-Z0-9, it is incremented within its case or digits. If it generates a carry, the process is repeated with the one to its immediate left.
`toStringz(s)`
`tr(str, from, to, modifiers)`	Replaces the characters in `str` which are in `from` with the the corresponding characters in `to` and returns the resulting string.
`translate(str, transTable, toRemove)`	Replaces the characters in `str` which are keys in `transTable` with their corresponding values in `transTable`. `transTable` is an AA where its keys are `dchar` and its values are either `dchar` or some type of string. Also, if `toRemove` is given, the characters in it are removed from `str` prior to translation. `str` itself is unaltered. A copy with the changes is returned.
`translate(str, transTable, toRemove, buffer)`	This is an overload of `translate` which takes an existing buffer to write the contents to.
`translate(str, transTable, toRemove)`	This is an ASCII-only overload of `translate`. It will not work with Unicode. It exists as an optimization for the cases where Unicode processing is not necessary.
`translate(str, transTable, toRemove, buffer)`	This is an ASCII-only overload of `translate` which takes an existing buffer to write the contents to.
`wrap(s, columns, firstindent, indent, tabsize)`	Wrap text into a paragraph.

Classes

Name	Description
`StringException`	Exception thrown on errors in std.string functions.

Aliases

Name	Type	Description
`CaseSensitive`	`Flag!("caseSensitive")`	Flag indicating whether a search is case-sensitive.
`KeepTerminator`	`Flag!("keepTerminator")`	Split `s` into an array of lines according to the unicode standard using `'\r'`, `'\n'`, `"\r\n"`, `lineSep`, `paraSep`, `U+0085` (NEL), `'\v'` and `'\f'` as delimiters. If `keepTerm` is set to `KeepTerminator.yes`, then the delimiter is included in the strings returned.

Authors

Walter Bright, Andrei Alexandrescu, Jonathan M Davis, and David L. 'SpottedTiger' Davis

License

Boost License 1.0.

API Documentation

Module `std.string`

See Also

Functions

Classes

Aliases

Authors

License

API Documentation

Module std.string

See Also

Functions

Classes

Aliases

Authors

License

Module `std.string`