From ec7b7e37ce97d25adc209befb2c12cf16eb06ef1 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Tue, 28 Jun 2016 13:00:14 +0300
Subject: Port to MSVC

---
 build2/b.cxx           |  4 ----
 build2/bin/target.cxx  |  2 +-
 build2/cli/target.cxx  |  4 ++--
 build2/cxx/target.cxx  | 14 +++++++-------
 build2/cxx/utility.cxx |  6 +++---
 build2/diagnostics     | 27 +++++++++++----------------
 build2/scope.cxx       |  4 +++-
 build2/target.cxx      |  7 ++++---
 build2/variable        |  5 ++++-
 build2/variable.cxx    | 15 +++++++--------
 build2/variable.txx    |  4 ++--
 11 files changed, 44 insertions(+), 48 deletions(-)

(limited to 'build2')

diff --git a/build2/b.cxx b/build2/b.cxx
index 713b227..3be9f95 100644
--- a/build2/b.cxx
+++ b/build2/b.cxx
@@ -5,10 +5,6 @@
 #include <time.h>      // tzset()
 #include <string.h>    // strerror()
 
-#include <stdlib.h>    // getenv()
-#include <unistd.h>    // getuid()
-#include <sys/types.h> // uid_t
-
 #include <sstream>
 #include <cstring>     // strcmp(), strchr()
 #include <typeinfo>
diff --git a/build2/bin/target.cxx b/build2/bin/target.cxx
index b0ce6d5..f141d97 100644
--- a/build2/bin/target.cxx
+++ b/build2/bin/target.cxx
@@ -10,7 +10,7 @@ namespace build2
 {
   namespace bin
   {
-    constexpr const char ext_var[] = "extension";
+    extern const char ext_var[] = "extension"; // VC 19 rejects constexpr.
 
     static target*
     obja_factory (const target_type&,
diff --git a/build2/cli/target.cxx b/build2/cli/target.cxx
index 52ddd17..e3d1526 100644
--- a/build2/cli/target.cxx
+++ b/build2/cli/target.cxx
@@ -15,8 +15,8 @@ namespace build2
   {
     // cli
     //
-    constexpr const char cli_ext_var[] = "extension";
-    constexpr const char cli_ext_def[] = "cli";
+    extern const char cli_ext_var[] = "extension";  // VC 19 rejects constexpr.
+    extern const char cli_ext_def[] = "cli";
 
     const target_type cli::static_type
     {
diff --git a/build2/cxx/target.cxx b/build2/cxx/target.cxx
index c5b5080..22ace50 100644
--- a/build2/cxx/target.cxx
+++ b/build2/cxx/target.cxx
@@ -10,9 +10,9 @@ namespace build2
 {
   namespace cxx
   {
-    constexpr const char ext_var[] = "extension";
+    extern const char ext_var[] = "extension";  // VC 19 rejects constexpr.
 
-    constexpr const char hxx_ext_def[] = "hxx";
+    extern const char hxx_ext_def[] = "hxx";
     const target_type hxx::static_type
     {
       "hxx",
@@ -24,7 +24,7 @@ namespace build2
       false
     };
 
-    constexpr const char ixx_ext_def[] = "ixx";
+    extern const char ixx_ext_def[] = "ixx";
     const target_type ixx::static_type
     {
       "ixx",
@@ -36,7 +36,7 @@ namespace build2
       false
     };
 
-    constexpr const char txx_ext_def[] = "txx";
+    extern const char txx_ext_def[] = "txx";
     const target_type txx::static_type
     {
       "txx",
@@ -48,7 +48,7 @@ namespace build2
       false
     };
 
-    constexpr const char cxx_ext_def[] = "cxx";
+    extern const char cxx_ext_def[] = "cxx";
     const target_type cxx::static_type
     {
       "cxx",
@@ -60,7 +60,7 @@ namespace build2
       false
     };
 
-    constexpr const char h_ext_def[] = "h";
+    extern const char h_ext_def[] = "h";
     const target_type h::static_type
     {
       "h",
@@ -72,7 +72,7 @@ namespace build2
       false
     };
 
-    constexpr const char c_ext_def[] = "c";
+    extern const char c_ext_def[] = "c";
     const target_type c::static_type
     {
       "c",
diff --git a/build2/cxx/utility.cxx b/build2/cxx/utility.cxx
index 0f4eb08..ed57fd2 100644
--- a/build2/cxx/utility.cxx
+++ b/build2/cxx/utility.cxx
@@ -36,9 +36,9 @@ namespace build2
 
           // @@ Is mapping for 14 and 17 correct? Maybe Update 2 for 14?
           //
-          if ((v == "11" && cver <= 16) || // C++11 since VS2010/10.0.
-              (v == "14" && cver <= 19) || // C++14 since VS2015/14.0.
-              (v == "17" && cver <= 20))   // C++17 since VS20??/15.0.
+          if ((v == "11" && cver < 16) || // C++11 since VS2010/10.0.
+              (v == "14" && cver < 19) || // C++14 since VS2015/14.0.
+              (v == "17" && cver < 20))   // C++17 since VS20??/15.0.
           {
             fail << "C++" << v << " is not supported by "
                  << cast<string> (rs["cxx.signature"]) <<
diff --git a/build2/diagnostics b/build2/diagnostics
index c0ba6ec..8aedf13 100644
--- a/build2/diagnostics
+++ b/build2/diagnostics
@@ -140,7 +140,7 @@ namespace build2
     diag_record (const diag_mark<B>& m)
         : empty_ (true), epilogue_ (nullptr) { *this << m;}
 
-    ~diag_record () noexcept(false);
+    ~diag_record () noexcept (false);
 
     void
     append (diag_epilogue e) const
@@ -159,30 +159,25 @@ namespace build2
 
     // Move constructible-only type.
     //
-    /*
-    @@ libstdc++ doesn't yet have the ostringstream move support.
-
+    // Older versions of libstdc++ don't have the ostringstream move support
+    // and accuratly detecting its version is non-trivial. So we always use
+    // the pessimized implementation with libstdc++. Luckily, GCC doesn't seem
+    // to be needing move due to copy/move elision.
+    //
     diag_record (diag_record&& r)
+#ifndef __GLIBCXX__
         : os_ (move (r.os_))
-    {
-      empty_ = r.empty_;
-      r.empty_ = true;
-
-      epilogue_ = r.epilogue_;
-      r.epilogue_ = nullptr;
-    }
-    */
-
-    diag_record (diag_record&& r)
+#endif
     {
       empty_ = r.empty_;
       epilogue_ = r.epilogue_;
 
       if (!empty_)
       {
-        assert (false); //@@ Stream verbosity will not be transferred.
+#ifdef __GLIBCXX__
+        stream_verb (os_, stream_verb (r.os_));
         os_ << r.os_.str ();
-
+#endif
         r.empty_ = true;
         r.epilogue_ = nullptr;
       }
diff --git a/build2/scope.cxx b/build2/scope.cxx
index c9a8ab9..0ef8de6 100644
--- a/build2/scope.cxx
+++ b/build2/scope.cxx
@@ -540,7 +540,9 @@ namespace build2
     return r;
   }
 
-  constexpr const char derived_tt_ext_var[] = "extension";
+  // VC 19 rejects constexpr.
+  //
+  extern const char derived_tt_ext_var[] = "extension";
 
   pair<reference_wrapper<const target_type>, bool> scope::
   derive_target_type (const string& name, const target_type& base)
diff --git a/build2/target.cxx b/build2/target.cxx
index 2e500aa..12bbfd1 100644
--- a/build2/target.cxx
+++ b/build2/target.cxx
@@ -498,8 +498,8 @@ namespace build2
        : &extension_pool.find (ext)));
   }
 
-  constexpr const char file_ext_var[] = "extension";
-  constexpr const char file_ext_def[] = "";
+  extern const char file_ext_var[] = "extension"; // VC 19 rejects constexpr.
+  extern const char file_ext_def[] = "";
 
   const target_type file::static_type
   {
@@ -613,7 +613,8 @@ namespace build2
     false
   };
 
-  constexpr const char man1_ext[] = "1";
+  extern const char man1_ext[] = "1"; // VC 19 rejects constexpr.
+
   const target_type man1::static_type
   {
     "man1",
diff --git a/build2/variable b/build2/variable
index a63b5b4..5b9189c 100644
--- a/build2/variable
+++ b/build2/variable
@@ -216,7 +216,10 @@ namespace build2
     // fit will have to be handled with an extra dynamic allocation.
     //
     std::aligned_storage<sizeof (name)>::type data_;
-    static const size_t size_ = sizeof (data_);
+
+    // VC 19 needs decltype.
+    //
+    static const size_t size_ = sizeof (decltype (data_));
 
     // Make sure we have sufficient storage for untyped values.
     //
diff --git a/build2/variable.cxx b/build2/variable.cxx
index 65bc023..67efc95 100644
--- a/build2/variable.cxx
+++ b/build2/variable.cxx
@@ -333,7 +333,7 @@ namespace build2
     throw invalid_argument (string ());
   }
 
-  constexpr const char* const value_traits<bool>::type_name = "bool";
+  const char* const value_traits<bool>::type_name = "bool";
 
   const value_type value_traits<bool>::value_type
   {
@@ -373,7 +373,7 @@ namespace build2
     throw invalid_argument (string ());
   }
 
-  constexpr const char* const value_traits<uint64_t>::type_name = "uint64";
+  const char* const value_traits<uint64_t>::type_name = "uint64";
 
   const value_type value_traits<uint64_t>::value_type
   {
@@ -459,7 +459,7 @@ namespace build2
     return s;
   }
 
-  constexpr const char* const value_traits<string>::type_name = "string";
+  const char* const value_traits<string>::type_name = "string";
 
   const value_type value_traits<string>::value_type
   {
@@ -504,7 +504,7 @@ namespace build2
     throw invalid_argument (string ());
   }
 
-  constexpr const char* const value_traits<path>::type_name = "path";
+  const char* const value_traits<path>::type_name = "path";
 
   const value_type value_traits<path>::value_type
   {
@@ -547,7 +547,7 @@ namespace build2
     throw invalid_argument (string ());
   }
 
-  constexpr const char* const value_traits<dir_path>::type_name = "dir_path";
+  const char* const value_traits<dir_path>::type_name = "dir_path";
 
   const value_type value_traits<dir_path>::value_type
   {
@@ -580,8 +580,7 @@ namespace build2
     return abs_dir_path (move (d));
   }
 
-  constexpr const char* const value_traits<abs_dir_path>::type_name =
-    "abs_dir_path";
+  const char* const value_traits<abs_dir_path>::type_name = "abs_dir_path";
 
   const value_type value_traits<abs_dir_path>::value_type
   {
@@ -616,7 +615,7 @@ namespace build2
     return names_view (&v.as<name> (), 1);
   }
 
-  constexpr const char* const value_traits<name>::type_name = "name";
+  const char* const value_traits<name>::type_name = "name";
 
   const value_type value_traits<name>::value_type
   {
diff --git a/build2/variable.txx b/build2/variable.txx
index 6d3121a..a3511d4 100644
--- a/build2/variable.txx
+++ b/build2/variable.txx
@@ -275,7 +275,7 @@ namespace build2
     value_traits<T>::type_name) + 's';
 
   template <typename T>
-  const value_type value_traits<vector<T>>::value_type
+  const value_type value_traits<vector<T>>::value_type = // VC 19 wants =.
   {
     value_traits<vector<T>>::type_name.c_str (),
     sizeof (vector<T>),
@@ -436,7 +436,7 @@ namespace build2
     value_traits<V>::type_name + "_map";
 
   template <typename K, typename V>
-  const value_type value_traits<std::map<K, V>>::value_type
+  const value_type value_traits<std::map<K, V>>::value_type = // VC 19 wants =.
   {
     value_traits<map<K, V>>::type_name.c_str (),
     sizeof (map<K, V>),
-- 
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