imports: Switch to Microsoft GSL implementation

... with two minor code base changes compared to previous
use of gsl-lite:

- dag.hpp: ActionNode::Ptr and ArtifactNode::Ptr are not
  wrapped in gsl::not_null<> anymore, due to lack of support
  for wrapping std::unique_ptr<>. More specifically, the
  move constructor is missing, rendering it impossible to
  use std::vector<>::emplace_back().

- utils/cpp/gsl.hpp: New header file added to implement the
  macros ExpectsAudit() and EnsureAudit(), asserts running
  only in debug builds, which were available in gsl-lite but
  are missing in MS GSL.

1 files changed, 4 insertions, 3 deletions

diff --git a/src/buildtool/build_engine/base_maps/user_rule.hpp b/src/buildtool/build_engine/base_maps/user_rule.hpp
index c1b6398c..58e5ca40 100644
--- a/src/buildtool/build_engine/base_maps/user_rule.hpp
+++ b/src/buildtool/build_engine/base_maps/user_rule.hpp
@@ -25,11 +25,12 @@
 #include <vector>
 
 #include "fmt/core.h"
-#include "gsl-lite/gsl-lite.hpp"
+#include "gsl/gsl"
 #include "src/buildtool/build_engine/base_maps/entity_name.hpp"
 #include "src/buildtool/build_engine/base_maps/expression_function.hpp"
 #include "src/buildtool/build_engine/expression/expression.hpp"
 #include "src/utils/cpp/concepts.hpp"
+#include "src/utils/cpp/gsl.hpp"
 
 namespace BuildMaps::Base {
 
@@ -357,8 +358,8 @@ static auto inline FindDuplicates(gsl::not_null<T_Result*> const& dups,
                                   T_First const& first,
                                   T_Second const& second,
                                   T_Rest const&... rest) -> void {
-    gsl_ExpectsAudit(std::is_sorted(first.begin(), first.end()) and
-                     std::is_sorted(second.begin(), second.end()));
+    ExpectsAudit(std::is_sorted(first.begin(), first.end()) and
+                 std::is_sorted(second.begin(), second.end()));
     std::set_intersection(first.begin(),
                           first.end(),
                           second.begin(),