regex_library.md

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Regex library

Provides standard regular expression functions. For Concert versions 8.0+.

Import

The following statement may be used to import the regex library:

import regex;

Functions

Name	Description
regex_search	Search for all matches of a regular expression in a string.
regex_match	Check if string matches regular expression.
regex_replace	Replace all occurrences of regular expression in string.

Examples

regex_search

The first argument is the name of the object variable to create. The object variable will contain a string array named data and an int count named length which indicates how long data is.

string data = "(Speed:366 Mass:35 Speed:378 Mass:32";
string regex = "(Speed:\d*)";

call regex_search : "result", data, regex;

println result.length;
println result.data[0], result.data[1], " done.";

int x = 0;

while x < result.length[0];
	println result.data[x];
	x += 1;
end;

regex_match

Will return 1 if there was an exact match, or 0 if there was no exact match.

int match;
string data2 = "subject";
string regex2 = "(sub)(.*)";

call regex_match : data2, regex2 -> match;

regex_replace

string r1 = "there is a subsequence in the string\n";
string r2 = "\b(sub)([^ ]*)";
string r3;
string r4 = "sub-$2";

call regex_replace : r1, r2, r4 -> r3;

println r3;