replace own regex class with std::regex

src/libutil/regex.cc

@@ -1,50 +0,0 @@
-#include "regex.hh"
-#include "types.hh"
-
-#include <algorithm>
-
-namespace nix {
-
-Regex::Regex(const string & pattern, bool subs)
-{
-    /* Patterns must match the entire string. */
-    int err = regcomp(&preg, ("^(" + pattern + ")$").c_str(), (subs ? 0 : REG_NOSUB) | REG_EXTENDED);
-    if (err) throw RegexError(format("compiling pattern ‘%1%’: %2%") % pattern % showError(err));
-    nrParens = subs ? std::count(pattern.begin(), pattern.end(), '(') : 0;
-}
-
-Regex::~Regex()
-{
-    regfree(&preg);
-}
-
-bool Regex::matches(const string & s)
-{
-    int err = regexec(&preg, s.c_str(), 0, 0, 0);
-    if (err == 0) return true;
-    else if (err == REG_NOMATCH) return false;
-    throw Error(format("matching string ‘%1%’: %2%") % s % showError(err));
-}
-
-bool Regex::matches(const string & s, Subs & subs)
-{
-    regmatch_t pmatch[nrParens + 2];
-    int err = regexec(&preg, s.c_str(), nrParens + 2, pmatch, 0);
-    if (err == 0) {
-        for (unsigned int n = 2; n < nrParens + 2; ++n)
-            if (pmatch[n].rm_eo != -1)
-                subs[n - 2] = string(s, pmatch[n].rm_so, pmatch[n].rm_eo - pmatch[n].rm_so);
-        return true;
-    }
-    else if (err == REG_NOMATCH) return false;
-    throw Error(format("matching string ‘%1%’: %2%") % s % showError(err));
-}
-
-string Regex::showError(int err)
-{
-    char buf[256];
-    regerror(err, &preg, buf, sizeof(buf));
-    return string(buf);
-}
-
-}

src/libutil/regex.hh

@@ -1,29 +0,0 @@
-#pragma once
-
-#include "types.hh"
-
-#include <sys/types.h>
-#include <regex.h>
-
-#include <map>
-
-namespace nix {
-
-MakeError(RegexError, Error)
-
-class Regex
-{
-public:
-    Regex(const string & pattern, bool subs = false);
-    ~Regex();
-    bool matches(const string & s);
-    typedef std::map<unsigned int, string> Subs;
-    bool matches(const string & s, Subs & subs);
-
-private:
-    unsigned nrParens;
-    regex_t preg;
-    string showError(int err);
-};
-
-}