Topkg.StringStrings.
include module type of Stringmake n c is a string of length n with each index holding the character c.
init n f is a string of length n with index i holding the character f i (called in increasing index order).
get s i is the character at index i in s. This is the same as writing s.[i].
Note. The Stdlib.( ^ ) binary operator concatenates two strings.
concat sep ss concatenates the list of strings ss, inserting the separator string sep between each.
compare s0 s1 sorts s0 and s1 in lexicographical order. compare behaves like Stdlib.compare on strings but may be more efficient.
contains_from s start c is true if and only if c appears in s after position start.
rcontains_from s stop c is true if and only if c appears in s before position stop+1.
contains s c is String.contains_from s 0 c.
sub s pos len is a string of length len, containing the substring of s that starts at position pos and has length len.
split_on_char sep s is the list of all (possibly empty) substrings of s that are delimited by the character sep.
The function's result is specified by the following invariants:
sep as a separator returns a string equal to the input (concat (make 1 sep)
(split_on_char sep s) = s).sep character.map f s is the string resulting from applying f to all the characters of s in increasing order.
mapi f s is like map but the index of the character is also passed to f.
trim s is s without leading and trailing whitespace. Whitespace characters are: ' ', '\x0C' (form feed), '\n', '\r', and '\t'.
escaped s is s with special characters represented by escape sequences, following the lexical conventions of OCaml.
All characters outside the US-ASCII printable range [0x20;0x7E] are escaped, as well as backslash (0x2F) and double-quote (0x22).
The function Scanf.unescaped is a left inverse of escaped, i.e. Scanf.unescaped (escaped s) = s for any string s (unless escaped s fails).
uppercase_ascii s is s with all lowercase letters translated to uppercase, using the US-ASCII character set.
lowercase_ascii s is s with all uppercase letters translated to lowercase, using the US-ASCII character set.
capitalize_ascii s is s with the first character set to uppercase, using the US-ASCII character set.
uncapitalize_ascii s is s with the first character set to lowercase, using the US-ASCII character set.
iter f s applies function f in turn to all the characters of s. It is equivalent to f s.[0]; f s.[1]; ...; f s.[length s - 1]; ().
iteri is like iter, but the function is also given the corresponding character index.
index_from s i c is the index of the first occurrence of c in s after position i.
index_from_opt s i c is the index of the first occurrence of c in s after position i (if any).
rindex_from s i c is the index of the last occurrence of c in s before position i+1.
rindex_from_opt s i c is the index of the last occurrence of c in s before position i+1 (if any).
index s c is String.index_from s 0 c.
index_opt s c is String.index_from_opt s 0 c.
rindex s c is String.rindex_from s (length s - 1) c.
rindex_opt s c is String.rindex_from_opt s (length s - 1) c.
to_seq s is a sequence made of the string's characters in increasing order. In "unsafe-string" mode, modifications of the string during iteration will be reflected in the iterator.
to_seqi s is like to_seq but also tuples the corresponding index.
create n returns a fresh byte sequence of length n. The sequence is uninitialized and contains arbitrary bytes.
set s n c modifies byte sequence s in place, replacing the byte at index n with c. You can also write s.[n] <- c instead of set s n c.
blit src src_pos dst dst_pos len copies len bytes from the string src, starting at index src_pos, to byte sequence dst, starting at character number dst_pos.
fill s pos len c modifies byte sequence s in place, replacing len bytes by c, starting at pos.
Return a copy of the argument, with all lowercase letters translated to uppercase, including accented letters of the ISO Latin-1 (8859-1) character set.
Return a copy of the argument, with all uppercase letters translated to lowercase, including accented letters of the ISO Latin-1 (8859-1) character set.
Return a copy of the argument, with the first character set to uppercase, using the ISO Latin-1 (8859-1) character set..
is_prefix ~affix s is true iff affix.[i] = s.[i] for all indices i of affix.
is_suffix ~affix s is true iff affix.[n - i] = s.[m - i] for all indices i of affix with n = String.length affix - 1 and m =
String.length s - 1.
for_all p s is true iff for all indices i of s, p s.[i]
= true.
exists p s is true iff there exists an index i of s with p s.[i] = true.
with_index_range ~first ~last s are the consecutive bytes of s whose indices exist in the range [first;last].
first defaults to 0 and last to String.length s - 1.
Note that both first and last can be any integer. If first > last the interval is empty and the empty string is returned.
cut ~sep s is either the pair Some (l,r) of the two (possibly empty) substrings of s that are delimited by the first match of the separator character sep or None if sep can't be matched in s. Matching starts from the beginning of s (rev is false, default) or the end (rev is true).
The invariant l ^ (String.make 1 sep) ^ r = s holds.
cuts ~sep s is the list of all substring of s that are delimited by matches of sep. Empty substrings are ommited in the list if empty is falsee (defaults to true). The invariant String.concat (String.make 1 sep) (split ~sep s) = s holds.
parse_version parses version strings of the form:
"[v]major.minor[.patchlevel][+additional-info]"into (major, minor, patch, additiona_info) tuples.