int2String() -> std::to_string()

src/libexpr/eval.cc

@@ -1392,7 +1392,7 @@ string EvalState::coerceToString(const Pos & pos, Value & v, PathSet & context,
            shell scripting convenience, just like `null'. */
         if (v.type == tBool && v.boolean) return "1";
         if (v.type == tBool && !v.boolean) return "";
-        if (v.type == tInt) return int2String(v.integer);
+        if (v.type == tInt) return std::to_string(v.integer);
         if (v.type == tNull) return "";
 
         if (v.isList()) {

src/libstore/build.cc

@@ -1732,7 +1732,7 @@ void DerivationGoal::startBuilder()
         if (passAsFile.find(i.first) == passAsFile.end()) {
             env[i.first] = i.second;
         } else {
-            Path p = tmpDir + "/.attr-" + int2String(fileNr++);
+            Path p = tmpDir + "/.attr-" + std::to_string(fileNr++);
             writeFile(p, i.second);
             filesToChown.insert(p);
             env[i.first + "Path"] = p;
@@ -2142,7 +2142,7 @@ void DerivationGoal::startBuilder()
                    CLONE_PARENT are not allowed together. */
                 child = clone(childEntry, stack + stackSize, flags & ~CLONE_NEWPID, this);
             if (child == -1) throw SysError("cloning builder process");
-            writeFull(builderOut.writeSide, int2String(child) + "\n");
+            writeFull(builderOut.writeSide, std::to_string(child) + "\n");
             _exit(0);
         }, options);
         if (helper.wait(true) != 0)

src/libstore/download.cc

@@ -240,7 +240,7 @@ Path downloadFileCached(const string & url, bool unpack)
             assert(!storePath.empty());
             replaceSymlink(storePath, fileLink);
 
-            writeFile(dataFile, url + "\n" + res.etag + "\n" + int2String(time(0)) + "\n");
+            writeFile(dataFile, url + "\n" + res.etag + "\n" + std::to_string(time(0)) + "\n");
         } catch (DownloadError & e) {
             if (storePath.empty()) throw;
             printMsg(lvlError, format("warning: %1%; using cached result") % e.msg());

src/libutil/archive.cc

@@ -243,7 +243,7 @@ static void parse(ParseSink & sink, Source & source, const Path & path)
                         if (i != names.end()) {
                             printMsg(lvlDebug, format("case collision between ‘%1%’ and ‘%2%’") % i->first % name);
                             name += caseHackSuffix;
-                            name += int2String(++i->second);
+                            name += std::to_string(++i->second);
                         } else
                             names[name] = 0;
                     }

src/libutil/util.cc

@@ -453,7 +453,7 @@ Nest::~Nest()
 
 static string escVerbosity(Verbosity level)
 {
-    return int2String((int) level);
+    return std::to_string((int) level);
 }
 
 

src/libutil/util.hh

@@ -356,13 +356,6 @@ template<class N> bool string2Int(const string & s, N & n)
     return str && str.get() == EOF;
 }
 
-template<class N> string int2String(N n)
-{
-    std::ostringstream str;
-    str << n;
-    return str.str();
-}
-
 
 /* Return true iff `s' ends in `suffix'. */
 bool hasSuffix(const string & s, const string & suffix);

src/nix-daemon/nix-daemon.cc

@@ -416,8 +416,8 @@ static void performOp(bool trusted, unsigned int clientVersion,
         settings.keepGoing = readInt(from) != 0;
         settings.set("build-fallback", readInt(from) ? "true" : "false");
         verbosity = (Verbosity) readInt(from);
-        settings.set("build-max-jobs", int2String(readInt(from)));
-        settings.set("build-max-silent-time", int2String(readInt(from)));
+        settings.set("build-max-jobs", std::to_string(readInt(from)));
+        settings.set("build-max-silent-time", std::to_string(readInt(from)));
         if (GET_PROTOCOL_MINOR(clientVersion) >= 2)
             settings.useBuildHook = readInt(from) != 0;
         if (GET_PROTOCOL_MINOR(clientVersion) >= 4) {
@@ -426,7 +426,7 @@ static void performOp(bool trusted, unsigned int clientVersion,
             settings.printBuildTrace = readInt(from) != 0;
         }
         if (GET_PROTOCOL_MINOR(clientVersion) >= 6)
-            settings.set("build-cores", int2String(readInt(from)));
+            settings.set("build-cores", std::to_string(readInt(from)));
         if (GET_PROTOCOL_MINOR(clientVersion) >= 10)
             settings.set("build-use-substitutes", readInt(from) ? "true" : "false");
         if (GET_PROTOCOL_MINOR(clientVersion) >= 12) {
@@ -720,7 +720,7 @@ static void daemonLoop(char * * argv)
 
     /* Handle socket-based activation by systemd. */
     if (getEnv("LISTEN_FDS") != "") {
-        if (getEnv("LISTEN_PID") != int2String(getpid()) || getEnv("LISTEN_FDS") != "1")
+        if (getEnv("LISTEN_PID") != std::to_string(getpid()) || getEnv("LISTEN_FDS") != "1")
             throw Error("unexpected systemd environment variables");
         fdSocket = SD_LISTEN_FDS_START;
     }
@@ -796,10 +796,10 @@ static void daemonLoop(char * * argv)
             PeerInfo peer = getPeerInfo(remote);
 
             struct passwd * pw = peer.uidKnown ? getpwuid(peer.uid) : 0;
-            string user = pw ? pw->pw_name : int2String(peer.uid);
+            string user = pw ? pw->pw_name : std::to_string(peer.uid);
 
             struct group * gr = peer.gidKnown ? getgrgid(peer.gid) : 0;
-            string group = gr ? gr->gr_name : int2String(peer.gid);
+            string group = gr ? gr->gr_name : std::to_string(peer.gid);
 
             Strings trustedUsers = settings.get("trusted-users", Strings({"root"}));
             Strings allowedUsers = settings.get("allowed-users", Strings({"*"}));
@@ -811,7 +811,7 @@ static void daemonLoop(char * * argv)
                 throw Error(format("user ‘%1%’ is not allowed to connect to the Nix daemon") % user);
 
             printMsg(lvlInfo, format((string) "accepted connection from pid %1%, user %2%" + (trusted ? " (trusted)" : ""))
-                % (peer.pidKnown ? int2String(peer.pid) : "<unknown>")
+                % (peer.pidKnown ? std::to_string(peer.pid) : "<unknown>")
                 % (peer.uidKnown ? user : "<unknown>"));
 
             /* Fork a child to handle the connection. */
@@ -832,7 +832,7 @@ static void daemonLoop(char * * argv)
 
                 /* For debugging, stuff the pid into argv[1]. */
                 if (peer.pidKnown && argv[1]) {
-                    string processName = int2String(peer.pid);
+                    string processName = std::to_string(peer.pid);
                     strncpy(argv[1], processName.c_str(), strlen(argv[1]));
                 }
 

src/nix-instantiate/nix-instantiate.cc

@@ -79,7 +79,7 @@ void processExpr(EvalState & state, const Strings & attrPaths,
                     printGCWarning();
                 else {
                     Path rootName = gcRoot;
-                    if (++rootNr > 1) rootName += "-" + int2String(rootNr);
+                    if (++rootNr > 1) rootName += "-" + std::to_string(rootNr);
                     drvPath = addPermRoot(*store, drvPath, rootName, indirectRoot);
                 }
                 std::cout << format("%1%%2%\n") % drvPath % (outputName != "out" ? "!" + outputName : "");

src/nix-store/nix-store.cc

@@ -81,7 +81,7 @@ static PathSet realisePath(Path path, bool build = true)
                 printGCWarning();
             else {
                 Path rootName = gcRoot;
-                if (rootNr > 1) rootName += "-" + int2String(rootNr);
+                if (rootNr > 1) rootName += "-" + std::to_string(rootNr);
                 if (i->first != "out") rootName += "-" + i->first;
                 outPath = addPermRoot(*store, outPath, rootName, indirectRoot);
             }
@@ -98,7 +98,7 @@ static PathSet realisePath(Path path, bool build = true)
         else {
             Path rootName = gcRoot;
             rootNr++;
-            if (rootNr > 1) rootName += "-" + int2String(rootNr);
+            if (rootNr > 1) rootName += "-" + std::to_string(rootNr);
             path = addPermRoot(*store, path, rootName, indirectRoot);
         }
         return singleton<PathSet>(path);