50 lines
1.6 KiB
Ruby
50 lines
1.6 KiB
Ruby
class BisonAT27 < 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-2.7.1.tar.gz"
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mirror "https://ftpmirror.gnu.org/bison/bison-2.7.1.tar.gz"
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sha256 "08e2296b024bab8ea36f3bb3b91d071165b22afda39a17ffc8ff53ade2883431"
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bottle do
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sha256 "c6c60860d585646d15840350b5c9e7b36026bdef84eab99dcd83887c20080d8a" => :high_sierra
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sha256 "f826962030514764d143e70416b82ad39b83b011f56836ed66dde769d267f1c5" => :sierra
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sha256 "f445b3e75cf7ac40ef2b4bfa2953acaf477e21bc9fae7957584772a49b54872a" => :el_capitan
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sha256 "bafa9e03f97e3de2199a7c612d86f15dbb9722f77865a35a6d1cffb2d501841a" => :yosemite
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end
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keg_only :versioned_formula
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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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