52 lines
1.7 KiB
Ruby
52 lines
1.7 KiB
Ruby
class Bison < Formula
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desc "Parser generator"
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homepage "https://www.gnu.org/software/bison/"
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url "https://ftp.gnu.org/gnu/bison/bison-3.4.2.tar.xz"
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mirror "https://ftpmirror.gnu.org/bison/bison-3.4.2.tar.xz"
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sha256 "27d05534699735dc69e86add5b808d6cb35900ad3fd63fa82e3eb644336abfa0"
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bottle do
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sha256 "9365c9bf0e92fe51879eef413dc8acaf0486ceb04af9e4d1d0f4f6854b26790f" => :catalina
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sha256 "0908297a5806ee2bfd3ce20e88ca83cb43252f937b0edfb206cc4c3aa6fc1212" => :mojave
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sha256 "30f01dbe68208544cf61eb26895facc6c3ffd788a97097286261ebfab4736112" => :high_sierra
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sha256 "38fb4e95438e8d7ecd176c047880822bba5c6c6ce352516fce161fa6ba36bce8" => :sierra
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end
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uses_from_macos "m4"
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keg_only :provided_by_macos, "some formulae require a newer version of bison"
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def install
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system "./configure", "--disable-dependency-tracking",
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"--prefix=#{prefix}"
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system "make", "install"
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end
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test do
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(testpath/"test.y").write <<~EOS
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%{ #include <iostream>
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using namespace std;
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extern void yyerror (char *s);
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extern int yylex ();
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%}
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%start prog
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%%
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prog: // empty
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| prog expr '\\n' { cout << "pass"; exit(0); }
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;
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expr: '(' ')'
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| '(' expr ')'
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| expr expr
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;
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%%
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char c;
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void yyerror (char *s) { cout << "fail"; exit(0); }
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int yylex () { cin.get(c); return c; }
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int main() { yyparse(); }
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EOS
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system "#{bin}/bison", "test.y"
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system ENV.cxx, "test.tab.c", "-o", "test"
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assert_equal "pass", shell_output("echo \"((()(())))()\" | ./test")
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assert_equal "fail", shell_output("echo \"())\" | ./test")
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end
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end
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