string_example.cc

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/*                Centre for Speech Technology Research                 */
/*                     University of Edinburgh, UK                      */
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/************************************************************************/
/*                 Author: Richard Caley                                */
/*                   Date: May 1997                                     */
/************************************************************************/
#include "EST_String.h"
#include <iostream>
#include <cstdio>

using namespace std;

int main()
{
    EST_String example("hello world");
    EST_Regex exclamation("\\(wow\\|yey\\|lo\\)[^a-z]");

    cout << example << "\n";
    cout.flush();
    printf("stdio version %s\n", (const char *)example);
    fflush(stdout);

    if (example.contains(exclamation))
      cout << "\nYes, it contains a match for " << exclamation << "\n";

    // find a match and extract the thing in brackets
    size_t start_br[EST_Regex_max_subexpressions];
    size_t end_br[EST_Regex_max_subexpressions];
    size_t len;

    if (example.search(exclamation, len, 0, start_br, end_br)!=EST_STRING_ERR_IDX)
      {
    // whole match is item 0
    cout << "match was '" << example.at(start_br[0], end_br[0]- start_br[0]) << "'\n";

    // first set of brackets.
    cout << " word was '" << example.at(start_br[1], end_br[1]- start_br[1]) << "'\n";
      }

    cout << "\n";

    // substituting into a string based on a regular expression
    EST_String source("http://www.cstr.ed.ac.uk/speech_tools");
    EST_Regex url_re("\\([a-z]*\\)://\\([^/]*\\)\\(.*\\)");
    EST_String target("protocol=\\1 host=\\2 path=\\3 dummy=\\6");

    cout << "processing '" <<source <<"'\n";
    if (source.matches(url_re,
               0, 
               start_br, end_br))
      {
    target.subst(source, start_br, end_br);
    cout << "   gives '" << target <<"'\n";
      }
    else
      cout <<"No match for URL RE\n";

    EST_String complex("what if I don't like 'hello world'?");

    EST_String quoted(complex.quote_if_needed('\''));
    EST_String unquoted(quoted.unquote_if_needed('\''));

    cout << "\n";
    cout << "start with \"" << complex << "\"\n";
    cout << "    quoted \"" << quoted << "\"\n";
    cout << "   unquoted \"" << unquoted << "\"\n";

#if 0
    EST_String gubbins = unquoted + quoted;

    cout << "   gubbins \"" << gubbins << "\"\n";
#endif

    return 0;
}