From ed4505ca0538664c5db9bfc832b3f82bb54bdd43 Mon Sep 17 00:00:00 2001
From: Antony Polukhin <antoshkka@gmail.com>
Date: Wed, 21 Oct 2020 14:38:35 +0300
Subject: [PATCH] Make the generate_cpp17.py script python version agnostic and
 add smoke test that the script works (fixes #57)

---
 misc/generate_cpp17.py | 32 ++++++++++++++++----------------
 test/Jamfile.v2        |  7 ++++++-
 2 files changed, 22 insertions(+), 17 deletions(-)

diff --git a/misc/generate_cpp17.py b/misc/generate_cpp17.py
index 4290d0c..ee94c32 100644
--- a/misc/generate_cpp17.py
+++ b/misc/generate_cpp17.py
@@ -79,33 +79,33 @@ constexpr void tie_as_tuple(T& /*val*/, size_t_<I>) noexcept {
 
 
 indexes = "    a"
-print PROLOGUE
+print(PROLOGUE)
 funcs_count = 100 if len(sys.argv) == 1 else int(sys.argv[1])
 max_args_on_a_line = len(ascii_letters)
-for i in xrange(1, funcs_count):
+for i in range(1, funcs_count):
     if i % max_args_on_a_line == 0:
         indexes += ",\n    "
     else:
         indexes += ","
 
     if i >= max_args_on_a_line:
-        indexes += ascii_letters[i / max_args_on_a_line - 1]
+        indexes += ascii_letters[i // max_args_on_a_line - 1]
     indexes += ascii_letters[i % max_args_on_a_line]
 
-    print "template <class T>"
-    print "constexpr auto tie_as_tuple(T& val, size_t_<" + str(i + 1) + ">) noexcept {"
+    print("template <class T>")
+    print("constexpr auto tie_as_tuple(T& val, size_t_<" + str(i + 1) + ">) noexcept {")
     if i < max_args_on_a_line:
-        print "  auto& [" + indexes.strip() + "] = val; // ====================> Boost.PFR: User-provided type is not a SimpleAggregate."
-        print "  return ::boost::pfr::detail::make_tuple_of_references(" + indexes.strip() + ");"
+        print("  auto& [" + indexes.strip() + "] = val; // ====================> Boost.PFR: User-provided type is not a SimpleAggregate.")
+        print("  return ::boost::pfr::detail::make_tuple_of_references(" + indexes.strip() + ");")
     else:
-        print "  auto& ["
-        print indexes
-        print "  ] = val; // ====================> Boost.PFR: User-provided type is not a SimpleAggregate."
-        print ""
-        print "  return ::boost::pfr::detail::make_tuple_of_references("
-        print indexes
-        print "  );"
+        print("  auto& [")
+        print(indexes)
+        print("  ] = val; // ====================> Boost.PFR: User-provided type is not a SimpleAggregate.")
+        print("")
+        print("  return ::boost::pfr::detail::make_tuple_of_references(")
+        print(indexes)
+        print("  );")
 
-    print "}\n"
+    print("}\n")
 
-print EPILOGUE
+print(EPILOGUE)
diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index 68ecbb2..5e53d60 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -5,6 +5,7 @@
 # http://www.boost.org/LICENSE_1_0.txt)
 #
 
+import python ;
 import testing ;
 import ../../config/checks/config : requires ;
 
@@ -16,7 +17,6 @@ project
         [ requires cxx14_constexpr ]
     ;
 
-
 ########## BEGIN of helpers to detect Loophole trick support
 
 actions mp_simple_run_action
@@ -125,3 +125,8 @@ for local source_file in [ glob ./compile-fail/*.cpp ]
     pfr_tests += [ compile-fail $(source_file) : $(LOOPHOLE_ENGINE) : $(target_name)_lh ] ;
     pfr_tests += [ compile-fail $(source_file) : $(CLASSIC_ENGINE) : $(target_name)_classic ] ;
 }
+
+if [ python.configured ]
+{
+    testing.make-test run-pyd : ../misc/generate_cpp17.py ;
+}