on_contract_violation default None

recipes/gsl-lite/all/conanfile.py

@@ -1,7 +1,8 @@
+import os
+
 from conan import ConanFile
-from conan.tools.files import get, copy
+from conan.tools.files import copy, get
 from conan.tools.layout import basic_layout
-import os
 
 required_conan_version = ">=1.50.0"
 
@@ -23,11 +24,12 @@ class GslLiteConan(ConanFile):
     #  2. GSL_THROW_ON_CONTRACT_VIOLATION: a gsl::fail_fast exception will be thrown
     #  3. GSL_UNENFORCED_ON_CONTRACT_VIOLATION: nothing happens
     #
-    options = {
-        "on_contract_violation": ["terminate", "throw", "unenforced", "None"]
-    }
+    options = {"on_contract_violation": [None, "terminate", "throw", "unenforced"]}
     default_options = {
-        "on_contract_violation": "terminate",
+        "on_contract_violation": None,
+    }
+    options_description = {
+        "on_contract_violation": "Select the behavior when pre/post conditions on the GSL types are violated"
     }
 
     no_copy_source = True
@@ -59,7 +61,7 @@ def package_info(self):
         self.cpp_info.bindirs = []
         self.cpp_info.libdirs = []
         # TODO: back to global scope in conan v2 once cmake_find_package* generators removed
-        if self.options.on_contract_violation != "None":
+        if self.options.on_contract_violation:
             self.cpp_info.components["gsllite"].defines = [self._contract_map[str(self.options.on_contract_violation)]]
 
         # TODO: to remove in conan v2 once cmake_find_package* generators removed