Add support for fakes with const parameters

[michahoiting]

Using a fake function that has a const parameter leads to compiler errors.
For instance using a fake for the function ‘strlcpy’ see below.

• fff_test_cpp.cpp: FAKE_VALUE_FUNC(int, strlcpy3, char* const, const char* const, const size_t);
• test_cases.include: TEST_F(FFFTestSuite, when_fake_func_called_then_const_arguments_captured) { char dst[80]; strlcpy3(dst, __FUNCTION__, sizeof(__FUNCTION__)); }
• Running gmake:
Building file: fff_test_cpp.cpp
Invoking: GCC C++ Compiler
g++ -I../ -O0 -g3 -Wall -c -o "../build/fff_test_cpp.o" "fff_test_cpp.cpp"
fff_test_cpp.cpp:23: error: structure strlcpy3_fake' with uninitialized const members fff_test_cpp.cpp: In functionint strlcpy3(char_, const char_, size_t)':
fff_test_cpp.cpp:23: error: assignment of read-only data-member strlcpy3_Fake::arg0_val' fff_test_cpp.cpp:23: error: assignment of read-only data-memberstrlcpy3_Fake::arg1_val'
fff_test_cpp.cpp:23: error: assignment of read-only data-member `strlcpy3_Fake::arg2_val'
fff_test_cpp.cpp:23: error: assignment of read-only location
fff_test_cpp.cpp:23: error: assignment of read-only location
fff_test_cpp.cpp:23: error: assignment of read-only location
gmake[1]: *** [../build/fff_test_cpp.o] Error 1
• See also https://github.com/michahoiting/fff/tree/const-issue.
  The macros SAVE_ARG and SAVE_ARG_HISTORY in fff.h will need to be changed.

[daveismith]

Agreed, this feature would significantly increase the utility of fff for me.

[vperron]

Have been using @michahoiting 's fork with no issues for my (strongly) const parameterized code. Maybe it'd be time considering pulling that request ?
Many thanks for that microframework, has been incredibly helpful !

[meekrosoft]

I'd love to include this feature but I haven't received a pull request so far. Let me take a look at how to get his changes in here.

[meekrosoft]

Hi folks,
I have merged Micha's const parameter support. Many thanks to Micha for sharing!
Cheers,
Mike