Replace include guards with "#pragma once" #506
Merged
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As per our previous discussion here #500
this PR replaces the header include guards with
#pragma once
in all header files and in the python generator scripts. All tests (core+postgresql+mysql+sqlite3) ran successfully.The
#pragma once
is not standard but is supported by all major C++ compilers and easier to maintain than the old-style #ifndef #define...#endif include guards.