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Add builtin constants ‘langVersion’ and ‘nixVersion’

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The integer constant ‘langVersion’ denotes the current language
version.  It gets increased every time a language feature is
added/changed/removed.  It's currently 1.

The string constant ‘nixVersion’ contains the current Nix version,
e.g. "1.2pre2980_9de6bc5".
This commit is contained in:
Eelco Dolstra 2012-11-27 13:29:55 +01:00
parent 5943f41b8b
commit 8b8ee53bc7
6 changed files with 18 additions and 2 deletions
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2
src/libmain/shared.cc
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@ -180,7 +180,7 @@ static void initAndRun(int argc, char * * argv)
return;
}
else if (arg == "--version") {
std::cout << format("%1% (Nix) %2%") % programId % NIX_VERSION << std::endl;
std::cout << format("%1% (Nix) %2%") % programId % nixVersion << std::endl;
return;
}
else if (arg == "--keep-failed" || arg == "-K")