style(3p/nix): Remove 'using std::*' from types.hh r/840

It is considered bad form to use things from includes in headers, as
these directives propagate to everywhere else and can make it
confusing.

types.hh (which is includes almost literally everywhere) had some of
these directives, which this commit removes.

1 files changed, 34 insertions, 30 deletions

diff --git a/third_party/nix/src/libstore/store-api.cc b/third_party/nix/src/libstore/store-api.cc
index 50e9b3b6ea..e6891395cd 100644
--- a/third_party/nix/src/libstore/store-api.cc
+++ b/third_party/nix/src/libstore/store-api.cc
@@ -48,7 +48,7 @@ Path Store::followLinksToStore(const Path& _path) const {
     if (!isLink(path)) {
       break;
     }
-    string target = readLink(path);
+    std::string target = readLink(path);
     path = absPath(target, dirOf(path));
   }
   if (!isInStore(path)) {
@@ -61,22 +61,23 @@ Path Store::followLinksToStorePath(const Path& path) const {
   return toStorePath(followLinksToStore(path));
 }
 
-string storePathToName(const Path& path) {
+std::string storePathToName(const Path& path) {
   auto base = baseNameOf(path);
   assert(base.size() == storePathHashLen ||
          (base.size() > storePathHashLen && base[storePathHashLen] == '-'));
-  return base.size() == storePathHashLen ? ""
-                                         : string(base, storePathHashLen + 1);
+  return base.size() == storePathHashLen
+             ? ""
+             : std::string(base, storePathHashLen + 1);
 }
 
-string storePathToHash(const Path& path) {
+std::string storePathToHash(const Path& path) {
   auto base = baseNameOf(path);
   assert(base.size() >= storePathHashLen);
-  return string(base, 0, storePathHashLen);
+  return std::string(base, 0, storePathHashLen);
 }
 
-void checkStoreName(const string& name) {
-  string validChars = "+-._?=";
+void checkStoreName(const std::string& name) {
+  std::string validChars = "+-._?=";
 
   auto baseError =
       format(
@@ -90,7 +91,7 @@ void checkStoreName(const string& name) {
 
   /* Disallow names starting with a dot for possible security
      reasons (e.g., "." and ".."). */
-  if (string(name, 0, 1) == ".") {
+  if (std::string(name, 0, 1) == ".") {
     throw Error(baseError % "it is illegal to start the name with a period");
   }
   /* Disallow names longer than 211 characters. ext4’s max is 256,
@@ -100,7 +101,7 @@ void checkStoreName(const string& name) {
   }
   for (auto& i : name) {
     if (!((i >= 'A' && i <= 'Z') || (i >= 'a' && i <= 'z') ||
-          (i >= '0' && i <= '9') || validChars.find(i) != string::npos)) {
+          (i >= '0' && i <= '9') || validChars.find(i) != std::string::npos)) {
       throw Error(baseError % (format("the '%1%' character is invalid") % i));
     }
   }
@@ -176,10 +177,11 @@ void checkStoreName(const string& name) {
    "source:".
 */
 
-Path Store::makeStorePath(const string& type, const Hash& hash,
-                          const string& name) const {
+Path Store::makeStorePath(const std::string& type, const Hash& hash,
+                          const std::string& name) const {
   /* e.g., "source:sha256:1abc...:/nix/store:foo.tar.gz" */
-  string s = type + ":" + hash.to_string(Base16) + ":" + storeDir + ":" + name;
+  std::string s =
+      type + ":" + hash.to_string(Base16) + ":" + storeDir + ":" + name;
 
   checkStoreName(name);
 
@@ -188,31 +190,32 @@ Path Store::makeStorePath(const string& type, const Hash& hash,
          "-" + name;
 }
 
-Path Store::makeOutputPath(const string& id, const Hash& hash,
-                           const string& name) const {
+Path Store::makeOutputPath(const std::string& id, const Hash& hash,
+                           const std::string& name) const {
   return makeStorePath("output:" + id, hash,
                        name + (id == "out" ? "" : "-" + id));
 }
 
 Path Store::makeFixedOutputPath(bool recursive, const Hash& hash,
-                                const string& name) const {
+                                const std::string& name) const {
   return hash.type == htSHA256 && recursive
              ? makeStorePath("source", hash, name)
              : makeStorePath(
                    "output:out",
-                   hashString(htSHA256,
-                              "fixed:out:" + (recursive ? (string) "r:" : "") +
-                                  hash.to_string(Base16) + ":"),
+                   hashString(
+                       htSHA256,
+                       "fixed:out:" + (recursive ? (std::string) "r:" : "") +
+                           hash.to_string(Base16) + ":"),
                    name);
 }
 
-Path Store::makeTextPath(const string& name, const Hash& hash,
+Path Store::makeTextPath(const std::string& name, const Hash& hash,
                          const PathSet& references) const {
   assert(hash.type == htSHA256);
   /* Stuff the references (if any) into the type.  This is a bit
      hacky, but we can't put them in `s' since that would be
      ambiguous. */
-  string type = "text";
+  std::string type = "text";
   for (auto& i : references) {
     type += ":";
     type += i;
@@ -220,7 +223,7 @@ Path Store::makeTextPath(const string& name, const Hash& hash,
   return makeStorePath(type, hash, name);
 }
 
-std::pair<Path, Hash> Store::computeStorePathForPath(const string& name,
+std::pair<Path, Hash> Store::computeStorePathForPath(const std::string& name,
                                                      const Path& srcPath,
                                                      bool recursive,
                                                      HashType hashAlgo,
@@ -231,7 +234,8 @@ std::pair<Path, Hash> Store::computeStorePathForPath(const string& name,
   return std::pair<Path, Hash>(dstPath, h);
 }
 
-Path Store::computeStorePathForText(const string& name, const string& s,
+Path Store::computeStorePathForText(const std::string& name,
+                                    const std::string& s,
                                     const PathSet& references) const {
   return makeTextPath(name, hashString(htSHA256, s), references);
 }
@@ -428,9 +432,9 @@ PathSet Store::queryValidPaths(const PathSet& paths,
 /* Return a string accepted by decodeValidPathInfo() that
    registers the specified paths as valid.  Note: it's the
    responsibility of the caller to provide a closure. */
-string Store::makeValidityRegistration(const PathSet& paths, bool showDerivers,
-                                       bool showHash) {
-  string s = s;
+std::string Store::makeValidityRegistration(const PathSet& paths,
+                                            bool showDerivers, bool showHash) {
+  std::string s = s;
 
   for (auto& i : paths) {
     s += i + "\n";
@@ -710,7 +714,7 @@ ValidPathInfo decodeValidPathInfo(std::istream& str, bool hashGiven) {
     return info;
   }
   if (hashGiven) {
-    string s;
+    std::string s;
     getline(str, s);
     info.narHash = Hash(s, htSHA256);
     getline(str, s);
@@ -719,7 +723,7 @@ ValidPathInfo decodeValidPathInfo(std::istream& str, bool hashGiven) {
     }
   }
   getline(str, info.deriver);
-  string s;
+  std::string s;
   int n;
   getline(str, s);
   if (!string2Int(s, n)) {
@@ -735,8 +739,8 @@ ValidPathInfo decodeValidPathInfo(std::istream& str, bool hashGiven) {
   return info;
 }
 
-string showPaths(const PathSet& paths) {
-  string s;
+std::string showPaths(const PathSet& paths) {
+  std::string s;
   for (auto& i : paths) {
     if (!s.empty()) {
       s += ", ";