Cross-platform Vox hello world

// > vox hello_vox.vx && hello_vox // hello windows // > vox hello_vox.vx --target=linux-x64 // > wsl ./hello_vox // hello linux

#version(windows) { @extern(module, "kernel32"):

enum u32 stdin  = 0xFFFFFFF6;
enum u32 stdout = 0xFFFFFFF5;
enum u32 stderr = 0xFFFFFFF4;

noreturn ExitProcess(u32 uExitCode);
u8 WriteConsoleA(void* hConsoleOutput, u8* lpBuffer, u32 nNumberOfCharsToWrite, u32* lpNumberOfCharsWritten, void* lpReserved);
void* GetStdHandle(u32 nStdHandle);

alias exit = ExitProcess;

void write(u32 fd, u8[] data) {
	WriteConsoleA(GetStdHandle(fd), data.ptr, cast(u32)data.length, null, null);
}

}

#version(linux) { enum u32 stdin = 0; enum u32 stdout = 1; enum u32 stderr = 2;

@extern(syscall, 60)
void exit(i32 error_code);

@extern(syscall, 1)
void sys_write(u32 fd, u8* buf, u64 count);

void write(u32 fd, u8[] data) {
	sys_write(fd, data.ptr, data.length);
}

}

void main(void* hInstance, void* hPrevInstance, u8* lpCmdLine, i32 nShowCmd) { #version(windows) u8[] msg = "hello windows\n"; #version(linux) u8[] msg = "hello linux\n"; write(stdout, msg); exit(0); }