51 lines
1.6 KiB
Ruby
51 lines
1.6 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-3.5.1.tar.xz"
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mirror "https://ftpmirror.gnu.org/bison/bison-3.5.1.tar.xz"
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sha256 "3e7e097bd9709a2d5e40e69446b74b149733b3de864fadb7a9b54eca7b2a4dd0"
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bottle do
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sha256 "0a99cc32f88221f5e733ee7db13536f83a2e5232458f89b1725a3bfe09013b08" => :catalina
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sha256 "9e0c9fffc249e3578f103b70163e76cb6757c896794e7c59c5caf17c7ff32258" => :mojave
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sha256 "ef24c90f7fb895768f1c96b9822dae1b112b068a075e2afd5baf398313b6d395" => :high_sierra
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end
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keg_only :provided_by_macos, "some formulae require a newer version of bison"
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uses_from_macos "m4"
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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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