don't implicitly convert doubles to ints

example/issues.cpp

@@ -104,4 +104,8 @@ void init_issues(py::module &m) {
 
     // (no id): should not be able to pass 'None' to a reference argument
     m2.def("print_element", [](ElementA &el) { std::cout << el.value() << std::endl; });
+
+    // (no id): don't cast doubles to ints
+    m2.def("expect_float", [](float f) { return f; });
+    m2.def("expect_int", [](int i) { return i; });
 }

example/issues.py

@@ -8,6 +8,7 @@ from example.issues import DispatchIssue, dispatch_issue_go
 from example.issues import Placeholder, return_vec_of_reference_wrapper
 from example.issues import iterator_passthrough
 from example.issues import ElementList, ElementA, print_element
+from example.issues import expect_float, expect_int
 import gc
 
 print_cchar("const char *")
@@ -47,3 +48,10 @@ try:
     print_element(None)
 except Exception as e:
     print("Failed as expected: " + str(e))
+
+try:
+    print(expect_int(5.2))
+except Exception as e:
+    print("Failed as expected: " + str(e))
+
+print(expect_float(12))

example/issues.ref

@@ -8,3 +8,7 @@ Yay..
 Failed as expected: Incompatible function arguments. The following argument types are supported:
     1. (example.issues.ElementA) -> NoneType
 
+Failed as expected: Incompatible function arguments. The following argument types are supported:
+    1. (int) -> int
+
+12.0