Warn if int/hex/string symbols are evaluated logically

They always evaluate to n.

Would be nice if there was a trivial way to give the location(s). Just
say "somewhere" for now.

1 files changed, 7 insertions, 0 deletions

diff --git a/kconfiglib.py b/kconfiglib.py
index 5afe43e..19cb32f 100644
--- a/kconfiglib.py
+++ b/kconfiglib.py
@@ -3334,6 +3334,13 @@ class Symbol(object):
             return self._cached_tri_val
 
         if self.orig_type not in (BOOL, TRISTATE):
+            if self.orig_type != UNKNOWN:
+                # Would take some work to give the location here
+                self.kconfig._warn(
+                    "The {} symbol {} is being evaluated in a logical context "
+                    "somewhere. It will always evaluate to n."
+                    .format(TYPE_TO_STR[self.orig_type], _name_and_loc(self)))
+
             self._cached_tri_val = 0
             return 0