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53 lines
1.5 KiB
Ruby
53 lines
1.5 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 "http://ftpmirror.gnu.org/bison/bison-3.8.2.tar.xz"
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mirror "https://ftp.gnu.org/gnu/bison/bison-3.8.2.tar.xz"
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sha256 "9bba0214ccf7f1079c5d59210045227bcf619519840ebfa80cd3849cff5a5bf2"
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bottle do
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sha256 "7a9139192cc1d0e5768b80e1857651daafdc708ad1e379a4c050dca324a248af" => :tiger_altivec
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end
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if MacOS.version < :leopard
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# GNU M4 1.4.6 or later is required; 1.4.16 or newer is recommended.
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depends_on "m4"
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end
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keg_only :provided_by_osx, "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.undent
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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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