1 files changed, 28 insertions, 0 deletions
diff --git a/docs/examples/userguide/fusedtypes/type_checking.pyx b/docs/examples/userguide/fusedtypes/type_checking.pyx
new file mode 100644
index 000000000..7bd359739
--- /dev/null
+++ b/docs/examples/userguide/fusedtypes/type_checking.pyx
@@ -0,0 +1,28 @@
+cimport cython
+
+ctypedef fused bunch_of_types:
+    bytes
+    int
+    float
+
+ctypedef fused string_t:
+    cython.p_char
+    bytes
+    unicode
+
+cdef cython.integral myfunc(cython.integral i, bunch_of_types s):
+    # Only one of these branches will be compiled for each specialization!
+    if cython.integral is int:
+        print('i is int')
+    elif cython.integral is long:
+        print('i is long')
+    else:
+        print('i is short')
+
+    if bunch_of_types in string_t:
+        print("s is a string!")
+    return i * 2
+
+myfunc(<int> 5, b'm')  # will print "i is an int" and "s is a string"
+myfunc(<long> 5, 3)    # will print "i is a long"
+myfunc(<short> 5, 3)   # will print "i is a short"