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, 2 insertions, 2 deletions

diff --git a/third_party/nix/src/libstore/builtins/buildenv.cc b/third_party/nix/src/libstore/builtins/buildenv.cc
index 77ad722fab15..d14474a93d7e 100644
--- a/third_party/nix/src/libstore/builtins/buildenv.cc
+++ b/third_party/nix/src/libstore/builtins/buildenv.cc
@@ -133,7 +133,7 @@ static void addPkg(const Path& pkgDir, int priority) {
   createLinks(pkgDir, out, priority);
 
   try {
-    for (const auto& p : tokenizeString<std::vector<string>>(
+    for (const auto& p : tokenizeString<std::vector<std::string>>(
              readFile(pkgDir + "/nix-support/propagated-user-env-packages"),
              " \n"))
       if (!done.count(p)) {
@@ -157,7 +157,7 @@ struct Package {
 typedef std::vector<Package> Packages;
 
 void builtinBuildenv(const BasicDerivation& drv) {
-  auto getAttr = [&](const string& name) {
+  auto getAttr = [&](const std::string& name) {
     auto i = drv.env.find(name);
     if (i == drv.env.end()) {
       throw Error("attribute '%s' missing", name);