Merge branch 'master' into bug/msys-python

1 files changed, 3 insertions, 3 deletions

diff --git a/SCons/Tool/swig.py b/SCons/Tool/swig.py
index ff0c80d44..aefd7cbaa 100644
--- a/SCons/Tool/swig.py
+++ b/SCons/Tool/swig.py
@@ -46,7 +46,7 @@ swigs = [ 'swig', 'swig3.0', 'swig2.0' ]
 
 SwigAction = SCons.Action.Action('$SWIGCOM', '$SWIGCOMSTR')
 
-def swigSuffixEmitter(env, source):
+def swigSuffixEmitter(env, source) -> str:
     if '-c++' in SCons.Util.CLVar(env.subst("$SWIGFLAGS", source=source)):
         return '$SWIGCXXFILESUFFIX'
     else:
@@ -78,7 +78,7 @@ def _find_modules(src):
         directors = directors or 'directors' in m[0]
     return mnames, directors
 
-def _add_director_header_targets(target, env):
+def _add_director_header_targets(target, env) -> None:
     # Directors only work with C++ code, not C
     suffix = env.subst(env['SWIGCXXFILESUFFIX'])
     # For each file ending in SWIGCXXFILESUFFIX, add a new target director
@@ -158,7 +158,7 @@ def _get_swig_version(env, swig):
 
     return version
 
-def generate(env):
+def generate(env) -> None:
     """Add Builders and construction variables for swig to an Environment."""
     c_file, cxx_file = SCons.Tool.createCFileBuilders(env)