CUDA Example: Refactor to Number 0

Less fiddeling in the scripts when adding more examples later on.

CMakeLists.txt

@@ -115,6 +115,8 @@ set(PYBIND11_EXAMPLES
   example/example13.cpp
 )
 
+set(PYBIND11_FIRSTEXAMPLE 1)
+set(PYBIND11_LASTEXAMPLE 13)
 
 if(${CUDA_FOUND})
   macro(add_library_wrapper)
@@ -125,7 +127,8 @@ if(${CUDA_FOUND})
   add_definitions(-DPYBIND11_CUDA=1)
   list(APPEND CUDA_NVCC_FLAGS -std=c++11)
   list(APPEND CUDA_NVCC_FLAGS -arch=${CUDA_ARCH})
-  set(PYBIND11_EXAMPLES ${PYBIND11_EXAMPLES} example/example14.cu)
+  set(PYBIND11_EXAMPLES ${PYBIND11_EXAMPLES} example/example0.cu)
+  set(PYBIND11_FIRSTEXAMPLE 0)
 else()
   macro(add_library_wrapper)
     add_library(${ARGV})
@@ -207,9 +210,7 @@ endif()
 
 enable_testing()
 set(RUN_TEST ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/example/run_test.py)
-list(LENGTH PYBIND11_EXAMPLES PYBIND11_NUMEXAMPLES)
-math(EXPR PYBIND11_NUMEXAMPLES "${PYBIND11_NUMEXAMPLES} - 1")
-foreach(i RANGE 1 ${PYBIND11_NUMEXAMPLES})
+foreach(i RANGE ${PYBIND11_FIRSTEXAMPLE} ${PYBIND11_LASTEXAMPLE})
   add_test(NAME example${i} COMMAND ${RUN_TEST} example${i})
 endforeach()
 

example/example.cpp

@@ -10,6 +10,9 @@
 
 #include "example.h"
 
+#if (PYBIND11_CUDA==1)
+void init_ex0(py::module &);
+#endif
 void init_ex1(py::module &);
 void init_ex2(py::module &);
 void init_ex3(py::module &);
@@ -23,13 +26,13 @@ void init_ex10(py::module &);
 void init_ex11(py::module &);
 void init_ex12(py::module &);
 void init_ex13(py::module &);
-#if (PYBIND11_CUDA==1)
-void init_ex14(py::module &);
-#endif
 
 PYBIND11_PLUGIN(example) {
     py::module m("example", "pybind example plugin");
 
+#if (PYBIND11_CUDA==1)
+    init_ex0(m);
+#endif
     init_ex1(m);
     init_ex2(m);
     init_ex3(m);
@@ -43,9 +46,6 @@ PYBIND11_PLUGIN(example) {
     init_ex11(m);
     init_ex12(m);
     init_ex13(m);
-#if (PYBIND11_CUDA==1)
-    init_ex14(m);
-#endif
 
     return m.ptr();
 }

example/example0.cu

@@ -1,5 +1,5 @@
 /*
-    example/example14.cu -- CUDA acceleratred Mandelbrot example
+    example/example0.cu -- CUDA acceleratred Mandelbrot example
 
     Copyright (c) 2012-2016 Axel Huebl <a.huebl@hzdr.de>
 
@@ -157,6 +157,6 @@ int mandelbrot() {
 
 namespace py = pybind11;
 
-void init_ex14(py::module &m) {
+void init_ex0(py::module &m) {
     m.def("mandelbrot", &mandelbrot, "Start mandelbrot calculation");
 }