better-enums/example/3-switch.cc
Ben Alex 832dad561f Modifications to support aggressive compiler warning levels.
These modifications ensure enum.h can be used in a wider
selection of end user projects without triggering warnings.

GCC 4.9.2 was used with the following warning flags set:

-Wall -Wextra -Wshadow -Weffc++ -Wno-unused-parameter
-Wno-unused-local-typedefs -Wno-long-long -Wstrict-aliasing
-Werror -pedantic -std=c++1y -Wformat=2 -Wmissing-include-dirs
-Wsync-nand -Wuninitialized -Wconditionally-supported -Wconversion
-Wuseless-cast -Wzero-as-null-pointer-constant

This commit includes the modifications required to enable successful
use of enum.h via both the "test" and "example" directories.
2015-05-27 14:18:12 +10:00

39 lines
813 B
C++

// Switch case exhaustiveness checking.
#include <iostream>
#include <enum.h>
ENUM(Channel, int, Red, Green, Blue)
void respond_to_channel(Channel channel)
{
// Try adding an extra case or removing one. Your compiler should issue a
// warning.
switch (channel) {
case +Channel::Red:
std::cout << "red channel" << std::endl;
break;
case +Channel::Green:
std::cout << "green channel" << std::endl;
break;
case +Channel::Blue:
std::cout << "blue channel" << std::endl;
break;
// A redundant case.
// case 3:
// break;
}
}
int main()
{
respond_to_channel(Channel::Red);
respond_to_channel(Channel::Blue);
respond_to_channel(Channel::Green);
return 0;
}