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, 5 insertions, 5 deletions

diff --git a/third_party/nix/src/libutil/hash.hh b/third_party/nix/src/libutil/hash.hh
index a9002023fa..f9c63c155e 100644
--- a/third_party/nix/src/libutil/hash.hh
+++ b/third_party/nix/src/libutil/hash.hh
@@ -14,7 +14,7 @@ const int sha1HashSize = 20;
 const int sha256HashSize = 32;
 const int sha512HashSize = 64;
 
-extern const string base32Chars;
+extern const std::string base32Chars;
 
 enum Base : int { Base64, Base32, Base16, SRI };
 
@@ -68,10 +68,10 @@ struct Hash {
 };
 
 /* Print a hash in base-16 if it's MD5, or base-32 otherwise. */
-string printHash16or32(const Hash& hash);
+std::string printHash16or32(const Hash& hash);
 
 /* Compute the hash of the given string. */
-Hash hashString(HashType ht, const string& s);
+Hash hashString(HashType ht, const std::string& s);
 
 /* Compute the hash of the given file. */
 Hash hashFile(HashType ht, const Path& path);
@@ -87,10 +87,10 @@ HashResult hashPath(HashType ht, const Path& path,
 Hash compressHash(const Hash& hash, unsigned int newSize);
 
 /* Parse a string representing a hash type. */
-HashType parseHashType(const string& s);
+HashType parseHashType(const std::string& s);
 
 /* And the reverse. */
-string printHashType(HashType ht);
+std::string printHashType(HashType ht);
 
 union Ctx;