<INTERFACE> The <CD/REGEXP/ signature <SEEALSO> <FCTREF/RegExpFn/ <STRREF/MatchTree/ </SEEALSO> <PP> This is the signature of a regular expressions matching structure. Such a structure is created by applying the functor <CD/RegExpFn/ to a given concrete syntax for regular expressions and a given matching engine.<PP> <SPEC> <TYPE><ID>regexp <COMMENT><PP> the type of a compiled regular expression <SPEC> <VAL>compile<TY>(char,'a) StringCvt.reader -> (regexp,'a) StringCvt.reader <COMMENT> <PROTOTY> compile <ARG/getc/ </PROTOTY> Given a character reader <ARG/getc/, this function returns a reader that parses a regular expression in the concrete syntax from the stream and compiles it. <SPEC> <VAL>compileString<TY>string -> regexp <COMMENT> <PROTOTY> compileString <ARG/s/ </PROTOTY> compiles a string representing a regular expression in the concrete syntax. The function <CD/compileString/ is equivalent to <CD/StringCvt.scanString compile/. <SPEC> <VAL>find<TY>regexp -> (char,'a) StringCvt.reader -> ({pos : 'a, len : int} option MatchTree.match_tree,'a) StringCvt.reader <COMMENT> <PROTOTY> find <ARG/r/ <ARG/getc/ </PROTOTY> Given a compiled regular expression <ARG/r/ and a character reader <ARG/getc/, this function returns a reader that scans the stream for the first match of the regular expression. The reader returns <CD/NONE/ if no match is found. <SPEC> <VAL>prefix<TY>regexp -> (char,'a) StringCvt.reader -> ({pos : 'a, len : int} option MatchTree.match_tree,'a) StringCvt.reader <COMMENT> <PROTOTY> prefix <ARG/r/ <ARG/getc/ </PROTOTY> Given a compiled regular expression <ARG/r/ and a character reader <ARG/getc/, this functions returns a reader that attempts to match the stream at its current position with the regular expression. The reader returns <CD/NONE/ if there is not match at the current position of the stream. <SPEC> <VAL>match<TY>(string * ({pos : 'a, len : int} option MatchTree.match_tree -> 'b)) list -> (char,'a) StringCvt.reader -> ('b,'a) StringCvt.reader <COMMENT> <PROTOTY> match <ARG/l/ <ARG/getc/ </PROTOTY> Given a list <ARG/l/ of tuples made up of a string representing a regular expression in the concrete syntax and a function from matching tree to values of type <CD/'b/, and given a character reader <ARG/getc/, this function returns a reader that attempts to match one of the given regular expressions at the current position of the stream. If a match is found, the corresponding function is applied to the match tree and the result is returned. The reader returns <CD/NONE/ if no match is found. </SIGNATURE> </INTERFACE>