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, 4 insertions, 4 deletions

diff --git a/third_party/nix/src/libstore/crypto.cc b/third_party/nix/src/libstore/crypto.cc
index 90580b8dc902..eb5bb6670738 100644
--- a/third_party/nix/src/libstore/crypto.cc
+++ b/third_party/nix/src/libstore/crypto.cc
@@ -9,7 +9,7 @@
 
 namespace nix {
 
-static std::pair<std::string, std::string> split(const string& s) {
+static std::pair<std::string, std::string> split(const std::string& s) {
   size_t colon = s.find(':');
   if (colon == std::string::npos || colon == 0) {
     return {"", ""};
@@ -17,7 +17,7 @@ static std::pair<std::string, std::string> split(const string& s) {
   return {std::string(s, 0, colon), std::string(s, colon + 1)};
 }
 
-Key::Key(const string& s) {
+Key::Key(const std::string& s) {
   auto ss = split(s);
 
   name = ss.first;
@@ -30,7 +30,7 @@ Key::Key(const string& s) {
   key = base64Decode(key);
 }
 
-SecretKey::SecretKey(const string& s) : Key(s) {
+SecretKey::SecretKey(const std::string& s) : Key(s) {
 #if HAVE_SODIUM
   if (key.size() != crypto_sign_SECRETKEYBYTES) {
     throw Error("secret key is not valid");
@@ -68,7 +68,7 @@ PublicKey SecretKey::toPublicKey() const {
 #endif
 }
 
-PublicKey::PublicKey(const string& s) : Key(s) {
+PublicKey::PublicKey(const std::string& s) : Key(s) {
 #if HAVE_SODIUM
   if (key.size() != crypto_sign_PUBLICKEYBYTES) {
     throw Error("public key is not valid");