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, 8 insertions, 6 deletions

diff --git a/third_party/nix/src/nix/why-depends.cc b/third_party/nix/src/nix/why-depends.cc
index bbbfd1fe0182..9c5eaf737c03 100644
--- a/third_party/nix/src/nix/why-depends.cc
+++ b/third_party/nix/src/nix/why-depends.cc
@@ -133,16 +133,18 @@ struct CmdWhyDepends : SourceExprCommand {
        closure (i.e., that have a non-infinite distance to
        'dependency'). Print every edge on a path between `package`
        and `dependency`. */
-    std::function<void(Node&, const string&, const string&)> printNode;
+    std::function<void(Node&, const std::string&, const std::string&)>
+        printNode;
 
-    const string treeConn = "╠═══";
-    const string treeLast = "╚═══";
-    const string treeLine = "║   ";
-    const string treeNull = "    ";
+    const std::string treeConn = "╠═══";
+    const std::string treeLast = "╚═══";
+    const std::string treeLine = "║   ";
+    const std::string treeNull = "    ";
 
     struct BailOut {};
 
-    printNode = [&](Node& node, const string& firstPad, const string& tailPad) {
+    printNode = [&](Node& node, const std::string& firstPad,
+                    const std::string& tailPad) {
       assert(node.dist != inf);
       std::cout << fmt("%s%s%s%s" ANSI_NORMAL "\n", firstPad,
                        node.visited ? "\e[38;5;244m" : "",